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  • MIC29202BU图
  • 深圳市高捷芯城科技有限公司

     该会员已使用本站11年以上
  • MIC29202BU 现货库存
  • 数量5098 
  • 厂家MICROCHIP(美国微芯) 
  • 封装TO-263-5 
  • 批号23+ 
  • 百分百原装正品,可原型号开票
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  • MIC29202BU图
  • 深圳市科时进电子有限公司

     该会员已使用本站11年以上
  • MIC29202BU 现货库存
  • 数量520 
  • 厂家MICREL/麦瑞 
  • 封装TO263-5 
  • 批号21+ 
  • 全新进口现货▊一手货源▊热卖支持实单▊bom配单专家
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  • MIC29202BU图
  • 深圳市欧立现代科技有限公司

     该会员已使用本站12年以上
  • MIC29202BU
  • 数量3800 
  • 厂家Micrel 
  • 封装TO-263 
  • 批号24+ 
  • 授权分销 现货热卖
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  • MIC29202BU图
  • 深圳市欧立现代科技有限公司

     该会员已使用本站12年以上
  • MIC29202BU
  • 数量6709 
  • 厂家MICREL 
  • 封装TO-2635 
  • 批号24+ 
  • 全新原装现货,欢迎询购!
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  • MIC29202BU图
  • 深圳市晶美隆科技有限公司

     该会员已使用本站15年以上
  • MIC29202BU
  • 数量68000 
  • 厂家MICREL/麦瑞 
  • 封装SOT-263 
  • 批号24+ 
  • 假一罚十,原装进口正品现货供应,价格优势。
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  • 0755-82865294 QQ:198857245
  • MIC29202BU图
  • 北京耐芯威科技有限公司

     该会员已使用本站13年以上
  • MIC29202BU
  • 数量5000 
  • 厂家MIC 
  • 封装TO-263五脚 
  • 批号21+ 
  • 原装正品,公司现货
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  • MIC29202BU图
  • 北京耐芯威科技有限公司

     该会员已使用本站12年以上
  • MIC29202BU
  • 数量3500 
  • 厂家MIC 
  • 封装TO-263五脚 
  • 批号21+ 
  • 原装正品,公司现货
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  • MIC29202BU图
  • 集好芯城

     该会员已使用本站13年以上
  • MIC29202BU
  • 数量15363 
  • 厂家MIC 
  • 封装SOP 
  • 批号最新批次 
  • 原装原厂 现货现卖
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  • MIC29202BU图
  • 深圳市晶美隆科技有限公司

     该会员已使用本站14年以上
  • MIC29202BU
  • 数量19759 
  • 厂家MIC 
  • 封装ZTP 5 
  • 批号23+ 
  • 全新原装正品现货热卖
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  • MIC29202BU图
  • 深圳市华科泰电子商行

     该会员已使用本站13年以上
  • MIC29202BU
  • 数量840000 
  • 厂家MIC 
  • 封装95 
  • 批号TO2635 
  • 绝对原装现货特价
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  • MIC29202BU图
  • 深圳市宏世佳电子科技有限公司

     该会员已使用本站13年以上
  • MIC29202BU
  • 数量3785 
  • 厂家Microchip 
  • 封装TO-263-6,D?Pak(5 引线 + 接片),TO-263BA 
  • 批号2023+ 
  • 全新原厂原装产品、公司现货销售
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  • MIC29202BU图
  • 首天国际(深圳)科技有限公司

     该会员已使用本站16年以上
  • MIC29202BU
  • 数量92845 
  • 厂家MICREL 
  • 封装OEM渠道,价格超越代理! 
  • 批号2024+ 
  • 百分百原装正品,现货库存
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  • MIC29202BU图
  • 深圳市硅诺电子科技有限公司

     该会员已使用本站8年以上
  • MIC29202BU
  • 数量62398 
  • 厂家MICREL 
  • 封装原厂指定分销商,有意请来电或QQ洽谈 
  • 批号17+ 
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  • MIC29202BU图
  • 深圳市晶美隆科技有限公司

     该会员已使用本站14年以上
  • MIC29202BU
  • 数量15830 
  • 厂家MICREL 
  • 封装TO-263 
  • 批号23+ 
  • 全新原装正品现货热卖
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  • MIC29202BU图
  • 深圳市宏捷佳电子科技有限公司

     该会员已使用本站12年以上
  • MIC29202BU
  • 数量15300 
  • 厂家Microchip Technology 
  • 封装TO-263-6,D?Pak(5 引线 + 接片),TO-263BA 
  • 批号24+ 
  • 只做原装★真实库存★含13点增值税票!
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  • MIC29202BU图
  • 深圳市赛尔通科技有限公司

     该会员已使用本站12年以上
  • MIC29202BU
  • 数量8460 
  • 厂家MICREL 
  • 封装SOP 
  • 批号NEW 
  • 【优势库存】专业代理全新现货热卖
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  • MIC29202BUTR图
  • 北京齐天芯科技有限公司

     该会员已使用本站15年以上
  • MIC29202BUTR
  • 数量5000 
  • 厂家MICREL 
  • 封装原厂封装 
  • 批号2024+ 
  • 原装正品,假一罚十
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  • 深圳市惊羽科技有限公司

     该会员已使用本站11年以上
  • MIC29202BU
  • 数量78800 
  • 厂家MICREL-麦瑞 
  • 封装TO-263-3 
  • 批号▉▉:2年内 
  • ▉▉¥10一一有问必回一一有长期订货一备货HK仓库
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  • MIC29202BU图
  • 深圳市三得电子有限公司

     该会员已使用本站15年以上
  • MIC29202BU
  • 数量36150 
  • 厂家MIC 
  • 封装SOT-263-5 
  • 批号2024 
  • 深圳原装现货库存,欢迎咨询合作
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  • MIC29202BU图
  • 上海熠富电子科技有限公司

     该会员已使用本站15年以上
  • MIC29202BU
  • 数量25000 
  • 厂家MIC 
  • 封装N/A 
  • 批号2024 
  • 上海原装现货库存,欢迎查询!
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  • MIC29202BU图
  • 深圳市浩兴林电子有限公司

     该会员已使用本站16年以上
  • MIC29202BU
  • 数量5000 
  • 厂家MIC 
  • 封装SMD 
  • 批号2017+ 
  • 优势库存现货,部分无铅
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  • MIC29202BU图
  • 深圳市宏世佳电子科技有限公司

     该会员已使用本站13年以上
  • MIC29202BU
  • 数量4675 
  • 厂家MICREL 
  • 封装TO263-5 
  • 批号2023+ 
  • 全新原厂原装产品、公司现货销售
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  • MIC29202BU图
  • 深圳市芳益电子科技有限公司

     该会员已使用本站10年以上
  • MIC29202BU
  • 数量30000 
  • 厂家MICREL 
  • 封装 
  • 批号2023+ 
  • 原装现货大量库存 低价出售 欢迎加Q详谈
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  • MIC29202BU图
  • 深圳市宗天技术开发有限公司

     该会员已使用本站10年以上
  • MIC29202BU
  • 数量1112 
  • 厂家MICREL/麦瑞 
  • 封装TO-263 
  • 批号21+ 
  • 宗天技术 原装现货/假一赔十
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  • MIC29202BU图
  • 上海金庆电子技术有限公司

     该会员已使用本站15年以上
  • MIC29202BU
  • 数量20237 
  • 厂家MIC 
  • 封装 
  • 批号新 
  • 全新原装 货期两周
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  • MIC29202BU图
  • 深圳市能元时代电子有限公司

     该会员已使用本站10年以上
  • MIC29202BU
  • 数量23000 
  • 厂家MIC 
  • 封装 
  • 批号24+ 
  • 原装现货假一赔十,可含长期供货!
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  • MIC29202BUTR图
  • 上海金庆电子技术有限公司

     该会员已使用本站15年以上
  • MIC29202BUTR
  • 数量4590 
  • 厂家MICREL 
  • 封装 
  • 批号新 
  • 全新原装 货期两周
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  • 深圳市华来深电子有限公司

     该会员已使用本站13年以上
  • MIC29202BU
  • 数量8560 
  • 厂家MIC 
  • 封装TO263-5 
  • 批号17+ 
  • 受权代理!全新原装现货特价热卖!
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  • 深圳市富科达科技有限公司

     该会员已使用本站13年以上
  • MIC29202BU
  • 数量38500 
  • 厂家MICREL 
  • 封装TO-263-5 
  • 批号2020+ 
  • 全新原装进口现货特价热卖,长期供货
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  • 深圳市思诺康科技有限公司

     该会员已使用本站16年以上
  • MIC29202BU
  • 数量1000 
  • 厂家Microchip Technology 
  • 封装TO-263-6 
  • 批号23+ 
  • IC-电源管理线性稳压器
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  • 万三科技(深圳)有限公司

     该会员已使用本站2年以上
  • MIC29202BU
  • 数量660000 
  • 厂家Microchip Technology 
  • 封装原厂原装 
  • 批号23+ 
  • 支持实单/只做原装
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  • MIC29202BU图
  • 万三科技(深圳)有限公司

     该会员已使用本站2年以上
  • MIC29202BU
  • 数量6500000 
  • 厂家微芯 
  • 封装原厂原装 
  • 批号22+ 
  • 万三科技 秉承原装 实单可议
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  • MIC29202BU图
  • 深圳市捷兴胜微电子科技有限公司

     该会员已使用本站13年以上
  • MIC29202BU
  • 数量1790 
  • 厂家MIC 
  • 封装TO-263 
  • 批号07+ 
  • 原装 现货 专业MIC供应商 优势库存热卖中!
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产品型号MIC29202BU的概述

芯片MIC29202BU概述 MIC29202BU是一款高性能线性稳压器,由Microchip Technology Inc.制造。其设计目标是提供稳定的输出电压,以满足各种电子设备对电源的需求。这款线性稳压器具有高效率、低功耗以及良好的负载和线路反馈特性,适用于广泛的应用场合,如电源管理、消费类电子、工业设备等。 MIC29202BU的输出电压可调范围为1.24V到37V,能够适应多种电压要求。这一特性使其在需要定制电压的应用中显得尤为重要。为了确保使用的灵活性,用户还可通过外部电阻设置输出电压,提供极大的配置自由度。 芯片MIC29202BU的详细参数 MIC29202BU的主要技术参数如下: - 输入电压范围:最大为40V - 输出电压范围:1.24V至37V(可调) - 输出电流:最大可达2A - 输出纹波电压:小于50mV(典型值) - 温度范围:-40°C至125°C - ...

产品型号MIC29202BU的Datasheet PDF文件预览

MIC2920A/29201/29202/29204  
400mA Low-Dropout Voltage Regulator  
General Description  
Features  
High output voltage accuracy  
The MIC2920A family are “bulletproof,” efficient voltage  
regulators with very low dropout voltage (typically 40mV at  
light loads and 370mV at 250mA), and very low quiescent  
current(140µAtypical).ThequiescentcurrentoftheMIC2920A  
increases only slightly in dropout, prolonging battery life. Key  
MIC2920Afeaturesincludeprotectionagainstreversedbattery,  
fold-back current limiting, and automotive “load dump”  
protection (60V positive transient).  
Guaranteed 400mA output  
Low quiescent current  
Low dropout voltage  
Extremely tight load and line regulation  
Very low temperature coefficient  
Current and thermal limiting  
Input withstands –20V reverse battery and  
60V positive transients  
The MIC2920 is available in several configurations. The  
MIC2920A-x.x devices are three pin fixed voltage regulators  
available in 3.3V, 4.85V, 5V, and 12V outputs. The MIC29201  
is a fixed regulator offering a logic compatible ON/OFF  
(shutdown) input and an error flag output. This flag may also  
be used as a power-on reset signal. A logic-compatible  
shutdown input is provided on the adjustable MIC29202  
which allows the regulator to be switched on and off. The  
MIC29204 8-pin SOIC adjustable regulator includes both  
shutdown and error flag pins and may be pin-strapped for 5V  
output or programmed from 1.24V to 26V using two external  
resistors.  
Error flag warns of output dropout  
Logic-controlled electronic shutdown  
Output programmable from 1.24V to 26V  
(MIC29202/MIC29204)  
Available in TO-220, TO-220-5, and surface-mount  
TO-263-5, SOT-223, and SO-8 packages.  
3
Applications  
Battery-powered equipment  
Cellular telephones  
Laptop, notebook, and palmtop computers  
PCMCIA VCC and VPP regulation/switching  
Bar code scanners  
Automotive electronics  
SMPS post-regulators  
Voltage reference  
High-efficiency linear power supplies  
Pin Configuration  
TAB  
OUTPUT  
SENSE  
INPUT  
NC  
1
2
3
4
8
7
6
5
SHUTDOWN  
GROUND  
NC  
1
2
3
ERROR  
INPUT  
OUTPUT  
MIC29201-3.3BM (SO-8)  
GROUND  
MIC2920A-x.xBS  
(SOT-223)  
OUTPUT  
SENSE  
INPUT  
1
2
3
4
8
7
6
5
ADJUST  
5V TAP  
ERROR  
SHUTDOWN  
GROUND  
MIC29204BM (SO-8)  
1
2 3 4 5  
1
2
3
5-Lead Package Pinouts  
MIC29201 MIC29202  
INPUT OUTPUT  
GROUND  
1) Error  
Adjust  
MIC2920A-xxBT  
(TO-220)  
MIC29201/29202BT  
(TO-220-5)  
1
2 3 4 5  
2) Input  
Shutdown  
Ground  
Input  
3) Ground  
4) Output  
5) Shutdown  
MIC29201/29202BU  
(TO-263-5)  
Output  
Tab is Ground on SOT-223, TO-220, and TO-263 packages.  
January 1998  
3-9  
MIC2920A/29201/29202/29204  
Micrel  
Absolute Maximum Ratings  
Ordering Information  
If Military/Aerospace specified devices  
are required, contact your local Micrel  
representative/distributor for availability  
and specifications.  
Part Number  
Voltage Temperature Range*  
Package  
SOT-223  
TO-220  
MIC2920A-3.3BS  
MIC2920A-3.3BT  
MIC2920A-4.8BS  
MIC2920A-4.8BT  
MIC2920A-5.0BS  
MIC2920A-5.0BT  
MIC2920A-12BS  
MIC2920A-12BT  
MIC29201-3.3BM  
MIC29201-3.3BT  
MIC29201-3.3BU  
MIC29201-4.8BT  
MIC29201-4.8BU  
MIC29201-5.0BT  
MIC29201-5.0BU  
MIC29201-12BT  
MIC29201-12BU  
MIC29202BT  
3.3V  
3.3V  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
–40°C to +125°C  
Power Dissipation ................ Internally Limited, Note 1  
4.85V  
4.85V  
5.0V  
SOT-223  
TO-220  
Lead Temperature (Soldering, 5 seconds) ........ 260°C  
Storage Temperature Range ............ –65°C to +150°C  
Operating Junction Temperature Range  
................................................. –40°C to +125°C  
Thermal Characteristics:  
SOT223 θJC .................................................... 15°C/W  
TO-220 θJC ......................................................... 3°C/W  
TO-263 θJC ......................................................... 3°C/W  
8-Pin SOIC θJA ...................................................Note 1  
Input Supply Voltage ...............................20V to +60V  
Operating Input Supply Voltage ...................2Vto 26V  
Adjust Input Voltage (Notes 9 and 10)  
......................................................1.5V to +26V  
Shutdown Input Voltage .........................0.3V to +30V  
Error Comparator Output Voltage .......... –0.3V to +30V  
SOT-223  
TO-220  
5.0V  
12V  
SOT-223  
TO-220  
12V  
3.3V  
SO-8  
3.3V  
TO-220-5  
TO-263-5  
TO-220-5  
TO-263-5  
TO-220-5  
TO-263-5  
TO-220-5  
TO-263-5  
TO-220-5  
TO-263-5  
SO-8  
3.3V  
4.85V  
4.85V  
5.0V  
Across the full operating temperature, the minimum  
input voltage range for full output current is 4.3V to 26V.  
Output will remain in-regulation at lower output voltages  
and low current loads down to an input of 2V at 25°C.  
5.0V  
12V  
12V  
* Junction temperatures  
Adj  
MIC29202BU  
Adj  
MIC29204BM  
5V and Adj  
5V and Adj  
MIC29204BN  
8-pin PDIP  
3-10  
January 1998  
MIC2920A/29201/29202/29204  
Micrel  
Electrical Characteristics  
Limits in standard typeface are for TJ = 25°C and limits in boldface apply over the full operating temperature range. Unless  
otherwisespecified,VIN =VOUT +1V,IL =1mA,CL =10µF.Adjustableversionaresetforanoutputof5V.TheMIC29202VSHUTDOWN  
0.7V. The eight pin MIC29204 is configured with the Adjust pin tied to the 5V Tap, the Output is tied to Output Sense (VOUT  
= 5V), and VSHUTDOWN 0.7V.  
Symbol  
Parameter  
Output Voltage  
Accuracy  
Conditions  
Min  
–1  
Typical  
Max  
1
Units  
VO  
Variation from factory trimmed VOUT  
%
–2  
2
1mA IL 400mA, across temp. range  
–2.5  
2.5  
MIC2920A-12 and 29201-12 only  
–1.5  
–3  
1.5  
3
1mA IL 400mA, across temp. range  
–4  
4
VO  
T  
Output Voltage  
Temperature Coef.  
Line Regulation  
(Note 2)  
20  
80  
100  
350  
ppm/°C  
VOUT > 10V only  
VO  
VO  
VIN = VOUT + 1V to 26V  
0.03  
0.10  
0.40  
0.16  
0.30  
%
%
VO  
VO  
Load Regulation  
IL = 1 to 250mA (Note 3)  
0.04  
100  
3
VIN – VO  
Dropout Voltage  
(Note 4)  
IL = 1mA  
150  
mV  
180  
IL = 100mA  
250  
350  
370  
500  
450  
VOUT > 10V only  
VOUT > 10V only  
IL = 250mA  
IL = 400mA  
600  
750  
IGND  
Ground Pin Current IL = 1mA  
(Note 5)  
140  
200  
µA  
300  
IL = 100mA  
1.3  
5
2
2.5  
mA  
IL = 250mA  
IL = 400mA  
9
12  
15  
13  
IGNDDO  
Ground Pin  
VIN = 0.5V less than designed VOUT  
180  
400  
µA  
Current at Dropout (VOUT 3.3V)  
(Note 5)  
IO = 1mA  
ILIMIT  
Current Limit  
VOUT = 0V  
(Note 6)  
425  
1000  
mA  
%/W  
1200  
VO  
PD  
Thermal Regulation (Note 7)  
0.05  
0.2  
en  
Output Noise  
Voltage  
CL = 10µF  
400  
260  
µV RMS  
(10Hz to 100kHz)  
IL = 100mA  
CL = 100µF  
January 1998  
3-11  
MIC2920A/29201/29202/29204  
Micrel  
Electrical Characteristics (Continued)  
MIC29202, MIC29204  
Parameter  
Conditions  
Min  
Typ  
Max  
Units  
Reference Voltage  
MIC29202  
1.223  
1.235  
1.247  
V
1.210  
1.260  
Reference Voltage  
Reference Voltage  
MIC29202 (Note 8)  
MIC29204  
1.204  
1.266  
V
V
1.210  
1.235  
1.260  
1.200  
1.270  
Reference Voltage  
MIC29204 (Note 8)  
(Note 7)  
1.185  
1.285  
V
Adjust Pin  
Bias Current  
20  
20  
40  
60  
nA  
Reference Voltage  
Temperature  
Coefficient  
ppm/°C  
nA/°C  
Adjust Pin Bias  
Current Temperature  
Coefficient  
0.1  
Error Comparator  
MIC29201, MIC29204  
Output Leakage  
Current  
V
OH = 26V  
0.01  
150  
60  
1.00  
2.00  
µA  
mV  
mV  
mV  
mV  
Output Low  
Voltage  
V
IN = 4.5V  
250  
400  
IOL = 250µA  
Upper Threshold  
Voltage  
(Note 9)  
40  
25  
Lower Threshold  
Voltage  
(Note 9)  
75  
95  
140  
Hysteresis  
(Note 9)  
15  
Shutdown Input  
Input Logic Voltage  
MIC29201, MIC29202, MIC29204  
1.3  
30  
V
Low (ON)  
High (OFF)  
0.7  
2.0  
Shutdown Pin  
Input Current  
VSHUTDOWN = 2.4V  
50  
100  
µA  
VSHUTDOWN = 26V  
450  
3
600  
750  
µA  
µA  
Regulator Output  
(Note 10)  
10  
Current in Shutdown  
20  
3-12  
January 1998  
MIC2920A/29201/29202/29204  
Micrel  
General Note: Devices are ESD protected; however, handling precautions are recommended.  
Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not  
apply when operating the device outside of its rated operating conditions. The maximum allowable power dissipation is a function of the  
maximum junction temperature, TJ (MAX), the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum  
allowable power dissipation at any ambient temperature is calculated using: P(MAX) = (TJ(MAX) – TA)/ θJA. Exceeding the maximum allowable  
power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The junction to ambient thermal  
resistance of the MIC29204BM is 160°C/W mounted on a PC board.  
Note 2: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.  
Note 3: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Changes in output voltage due to  
heating effects are covered by the thermal regulation specification.  
Note 4: Dropout Voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value  
measured at 1V differential. At low values of programmed output voltage, the minimum input supply voltage of 4.3V over temperature must  
be taken into account. The MIC2920A operates down to 2V of input at reduced output current at 25°C.  
Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus  
the ground pin current.  
Note 6: The MIC2920A features fold-back current limiting. The short circuit (VOUT = 0V) current limit is less than the maximum current with  
normal output voltage.  
Note 7: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding  
load or line regulation effects. Specifications are for a 200mA load pulse at VIN = 20V (a 4W pulse) for T = 10ms.  
Note 8:  
Note 9: Comparator thresholds are expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage  
measured at 6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = VOUT /VREF  
VREF VOUT (VIN – 1 V), 4.3V VIN 26V, 1 mA < IL 400 mA, TJ TJ MAX.  
=
(R1 + R2)/R2. For example, at a programmed output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95  
mVx5V/1.235V=384mV.ThresholdsremainconstantasapercentofVOUT asVOUT isvaried,withthedropoutwarningoccurringattypically  
5% below nominal, 7.7% guaranteed.  
3
Note 10: VSHUTDOWN 2V, VIN 26V,VOUT = 0, with Adjust pin tied to 5V Tap or to the R1, R2 junction (see Figure 3) with R1 150k.  
Note 11: When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode  
clamped to ground.  
Note 12: Maximum positive supply voltage of 60V must be of limited duration (< 100ms) and duty cycle ( 1%). The maximum continuous  
supply voltage is 26V.  
Schematic Diagram  
ADJUST  
IN  
R18  
20kΩ  
Q15A  
Q15B  
Q24  
Q26  
Q25  
OUT  
Q9  
R11  
18  
kΩ  
Q3  
Q1  
Q4  
Q7  
SENSE  
R27  
R28  
Q8  
Q5  
R17  
12 kΩ  
C1  
20  
pF  
Q14  
R11  
20.6  
kΩ  
Q6  
Q17  
Q16  
V TAP  
Q2  
10  
Q20  
R1  
20 kΩ  
Q22  
R10  
150  
kΩ  
Q42  
R8  
31.4 kΩ  
Q21  
Q23  
C2  
40 pF  
R2  
50 kΩ  
R15  
100 kΩ  
R5  
180  
kΩ  
R6  
140  
kΩ  
R9  
27.8 kΩ  
R12  
110  
kΩ  
R14  
350  
kΩ  
R13  
100  
kΩ  
R16  
30 kΩ  
Q40  
Q13  
Q12  
R17  
Q41  
Q11  
10 Ω  
Q29  
R30  
30  
Q18  
Q19  
Q28  
kΩ  
R3  
50 kΩ  
R4  
13 kΩ  
R21 8 Ω  
50 kΩ  
10 kΩ  
Q30 Q31  
SHDN  
R23 60 kΩ  
Q37  
Q36  
R22  
150 kΩ  
R24  
50 kΩ  
ERROR  
Q38  
Q34  
DENOTES CONNECTION ON  
MIC2920A-xx AND MIC29201-xx  
VERSIONS ONLY  
R26  
60 kΩ  
R25  
2.8 kΩ  
GND  
Q39  
January 1998  
3-13  
MIC2920A/29201/29202/29204  
Micrel  
Typical Characteristics  
Dropout Voltage  
vs. Temperature  
Dropout Voltage  
vs. Output Current  
Dropout  
Characteristics  
700  
600  
500  
400  
300  
200  
100  
0
500  
6
5
4
3
2
1
0
400  
300  
200  
100  
0
ILOAD = 1mA  
ILOAD = 400mA  
ILOAD = 400mA  
-60 -30  
0
30 60 90 120 150  
0
100  
200  
300  
400  
0
1
2
3
4
5
6
TEMPERATURE (°C)  
OUTPUT CURRENT (mA)  
INPUT VOLTAGE (V)  
Ground Current  
vs. Output Current  
Ground Current  
vs. Supply Voltage  
Ground Current  
vs. Supply Voltage  
20  
10  
200  
150  
100  
50  
30  
25  
20  
15  
10  
5
1
VOUT = 5V  
I
OUT = 1mA  
VOUT = 5V  
I
OUT = 400mA  
0.1  
0
0
1
10  
100  
400  
0
1
2
3
4
5
6
7
8
0
2
4
6
8
10  
OUTPUT CURRENT (mA)  
SUPPLY VOLTAGE (V)  
INPUT VOLTAGE (V)  
Ground Current  
vs. Temperature  
Ground Current  
vs. Temperature  
Ground Current  
vs. Temperature  
3
2
1
0
25  
20  
15  
10  
5
0.20  
0.15  
0.10  
0.05  
0.00  
ILOAD = 400mA  
ILOAD = 100mA  
IOUT = 1mA  
0
-60 -30  
0
30 60 90 120 150  
-60 -30  
0
30 60 90 120 150  
-60 -30  
0
30 60 90 120 150  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
Fixed 3.3V Output Voltage  
vs. Temperature  
Short Circuit and Maximum  
Current vs. Temperature  
Ground Current  
vs. Supply Voltage  
3.40  
3.38  
3.36  
3.34  
3.32  
3.30  
3.28  
3.26  
3.24  
3.22  
3.20  
700  
650  
600  
550  
500  
450  
400  
350  
300  
1000  
900  
800  
700  
600  
500  
400  
300  
200  
100  
0
VOUT = VNOMINAL – 0.5V  
VOUT = 3.3V  
RLOAD = 100Ω  
3 SAMPLES  
(HI/AVG/LO)  
VOUT = 0V  
-100  
-60 -30  
0
30 60 90 120 150  
-60 -30  
0
30 60 90 120 150  
-30 -20 -10  
0
10 20 30  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
INPUT VOLTAGE (V)  
3-14  
January 1998  
MIC2920A/29201/29202/29204  
Micrel  
MIC29201/2 Shutdown Current  
vs. Temperaure  
Load Transient  
Load Transient  
125  
200  
100  
0
100  
50  
0
COUT = 10µF  
COUT = 100µF  
100  
VEN = 5V  
-100  
-50  
75  
6
-200  
6
-100  
50  
400  
200  
0
400  
200  
0
VEN = 2V  
1mA  
1mA  
25  
0
-200  
-200  
-60 -30  
0
30 60 90 120 150  
-5  
0
5
10 15 20 25  
-5  
0
5
10 15 20 25  
TEMPERATURE (°C)  
TIME (ms)  
TIME (ms)  
MIC29202 Adjust Pin  
Current vs. Temperature  
Line Transient  
Line Transient  
50  
40  
30  
20  
10  
0
40  
20  
0
20  
10  
0
COUT = 10 µF  
L = 10mA  
COUT = 100 µF  
L = 10mA  
I
I
-20  
-410  
-10  
-210  
3
8
6
4
8
6
4
ILOAD = 1mA  
-60 -30  
0
30 60 90 120 150  
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4  
TIME (ms)  
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4  
TIME (ms)  
TEMPERATURE (°C)  
Output Impedance  
vs. Frequency  
10  
1
0.1  
ILOAD = 10mA  
0.01  
1
10  
100  
1k  
FREQUENCY (Hz)  
10k 1M  
100k  
Ripple Rejection  
0
-20  
CL = 10µF  
IL = 100mA  
-40  
1mA  
-60  
-80  
-100  
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6  
10  
1k  
10k 100k 1M  
100  
FREQUENCY (Hz)  
January 1998  
3-15  
MIC2920A/29201/29202/29204  
Applications Information  
External Capacitors  
Micrel  
system requirements, this resistor may be returned to the 5V  
output or some other supply voltage. In determining a value  
for this resistor, note that while the output is rated to sink  
250µA, this sink current adds to battery drain in a low battery  
condition. Suggested values range from 100k to 1M. The  
resistor is not required if this output is unused.  
A 10µF (or greater) capacitor is required between the  
MIC2920A output and ground to prevent oscillations due to  
instability. Most types of tantalum or aluminum electrolytics  
will be adequate; film types will work, but are costly and  
therefore not recommended. Many aluminum electrolytics  
haveelectrolytesthatfreezeatabout30°C,sosolidtantalums  
are recommended for operation below –25°C. The important  
parameters of the capacitor are an effective series resistance  
of about 5or less and a resonant frequency above 500kHz.  
The value of this capacitor may be increased without limit.  
Programming the Output Voltage (MIC29202/29204)  
The MIC29202/29204 may be programmed for any output  
voltage between its 1.235V reference and its 26V maximum  
rating, using an external pair of resistors, as shown in  
Figure 3.  
The complete equation for the output voltage is  
At lower values of output current, less output capacitance is  
required for output stability. The capacitor can be reduced to  
2.2µF for current below 10mA or 1µF for currents below  
1mA. Adjusting the MIC29202/29204 to voltages below 5V  
runs the error amplifier at lower gains so that more output  
capacitance is needed. For the worst-case situation of a  
500mAloadat1.23Voutput(OutputshortedtoAdjust)a47µF  
(or greater) capacitor should be used.  
VOUT = VREF × { 1 + R1/R2 } – |IFB| R1  
where VREF is the nominal 1.235 reference voltage and IFB is  
the Adjust pin bias current, nominally 20nA. The minimum  
recommended load current of 1µA forces an upper limit of  
1.2Mon the value of R2, if the regulator must work with no  
load (a condition often found in CMOS in standby), IFB will  
produce a –2% typical error in VOUT which may be eliminated  
at room temperature by trimming R1. For better accuracy,  
choosing R2 = 100k reduces this error to 0.17% while  
increasing the resistor program current to 12µA. Since the  
MIC29202/29204 typically draws 110µA at no load with  
SHUTDOWN open-circuited, this is a negligible addition. The  
MIC29204 may be pin-strapped for 5V using the internal  
voltage divider by tying Pin 1 (output) to Pin 2 (sense) and Pin  
7 (Adjust) to Pin 6 (V Tap).  
TheMIC2920A/29201willremaininregulationwithaminimum  
loadof1mA.WhensettingtheoutputvoltageoftheMIC29202/  
29204 versions with external resistors, the current through  
these resistors may be included as a portion of the minimum  
load.  
A 0.1µF capacitor should be placed from the MIC2920A input  
to ground if there is more than 10 inches of wire between the  
input and the AC filter capacitor or if a battery is used as the  
input.  
Configuring the MIC29201-3.3BM  
For the MIC29201-3.3BM, the output (Pin 1) and sense pin  
(pin 2), must be connected to ensure proper operation. They  
are not connected internally.  
Error Detection Comparator Output  
(MIC29201/MIC29204)  
Alogiclowoutputwillbeproducedbythecomparatorwhenever  
the MIC29201/29204 output falls out of regulation by more  
than approximately 5%. This figure is the comparator’s built-  
in offset of about 75mV divided by the 1.235V reference  
voltage. (Refer to the block diagram on Page 1). This trip level  
remains “5% below normal” regardless of the programmed  
output voltage of the MIC29201/29204. For example, the  
error flag trip level is typically 4.75V for a 5V output or 11.4V  
for a 12V output. The out of regulation condition may be due  
either to low input voltage, extremely high input voltage,  
current limiting, or thermal limiting.  
Reducing Output Noise  
In reference applications it may be advantageous to reduce  
the AC noise present at the output. One method is to reduce  
the regulator bandwidth by increasing the size of the output  
4.75V  
OUTPUT  
VOLTAGE  
NOT  
NOT  
*
ERROR  
*
Figure 1 is a timing diagram depicting the ERROR signal and  
the regulated output voltage as the MIC29201/29204 input is  
rampedupanddown.TheERRORsignalbecomesvalid(low)  
at about 1.3V input. It goes high at about 5V input (the input  
voltage at which VOUT = 4.75). Since the MIC29201/29204’s  
dropout voltage is load-dependent (see curve in Typical  
Performance Characteristics), the input voltage trip point  
(about 5V) will vary with the load current. The output voltage  
trip point (approximately 4.75V) does not vary with load.  
VALID  
VALID  
INPUT  
VOLTAGE  
5V  
1.3V  
* SEE APPLICATIONS INFORMATION  
Figure 1. ERROR Output Timing  
The error comparator has an NPN open-collector output  
which requires an external pull-up resistor. Depending on  
3-16  
January 1998  
MIC2920A/29201/29202/29204  
Micrel  
capacitor. This is relatively inefficient, as increasing the  
capacitor from 1µF to 220µF only decreases the noise from  
430µV to 160µVRMS for a 100kHz bandwidth at 5V output.  
Noise can be reduced fourfold by a bypass capacitor across  
R1, since it reduces the high frequency gain from 4 to unity.  
Automotive Applications  
TheMIC2920Aisideallysuitedforautomotiveapplicationsfor  
a variety of reasons. It will operate over a wide range of input  
voltages with very low dropout voltages (40mV at light loads),  
andverylowquiescentcurrents(100µAtypical).Thesefeatures  
are necessary for use in battery powered systems, such as  
automobiles. It is a “bulletproof” device with the ability to  
survive both reverse battery (negative transients up to 20V  
below ground), and load dump (positive transients up to 60V)  
conditions. A wide operating temperature range with low  
temperature coefficients is yet another reason to use these  
versatile regulators in automotive designs.  
Pick  
1
• 200 Hz  
CBYPASS  
2
π
R1  
or about 0.01µF. When doing this, the output capacitor must  
be increased to 10µF to maintain stability. These changes  
reduce the output noise from 430µV to 100µV rms for a  
100kHz bandwidth at 5V output. With the bypass capacitor  
added, noise no longer scales with output voltage so that  
improvements are more dramatic at higher output voltages.  
Typical Applications  
+V  
IN  
V
IN  
100kΩ  
8
V
IN  
V
+V  
OUT  
1.6V  
IN  
5
1
ERROR  
ERROR  
OUTPUT  
V
V
OUT  
3
OUT  
VOUT = 5V  
3
+
SHUTDOWN  
INPUT  
SHUTDOWN  
10µF  
10µF  
R
1
100  
pF  
OFF  
GND ADJUST  
GND  
ON  
4
7
1.23V  
R
R
2
V
1
REF  
V
= V  
REF  
x (1 +  
)
OUT  
R
2
NOTE: PINS 2 AND 6 ARE LEFT OPEN  
Figure 2. MIC2920A-5.0 Fixed +5V Regulator  
Figure 3. MIC29202/29204 Adjustable Regulator. Pinout is for  
MIC29204.  
5.3V  
+V  
IN  
8
8
+V  
IN  
V
OUT  
CC  
+V  
IN  
1
V
OUT  
SHUTDOWN  
INPUT  
3
*V  
OUT  
V  
IN  
1
ERROR  
OUTPUT  
5
SHUT-  
DOWN  
V
OUT  
ERROR  
HIGH = OFF  
+
10µF  
300kΩ  
100pF  
LOW = ON  
1%  
3
GND  
4
ADJUST  
7
SHUTDOWN  
INPUT  
SD  
OFF  
ADJUST  
GND  
220kΩ  
1%  
180kΩ  
1%  
ON  
HIGH = 5V OUT  
470 kΩ  
4
7
2N2222  
LOW = 3.3V OUT  
*MINIMUM INPUT-OUTPUT VOLTAGE RANGES FROM 40mV TO 400mV,  
DEPENDING ON LOAD CURRENT.  
PIN 3 LOW= ENABLE OUTPUT. Q1 ON = 3.3V, Q1 OFF = 5.0V.  
Figure 4. MIC29204 Wide Input Voltage Range Current Limiter  
Figure 5. MIC29202/29204 5.0V or 3.3V Selectable Regulator  
with Shutdown. Pinout is for MIC29204.  
January 1998  
3-17  
配单直通车
MIC29202BU产品参数
型号:MIC29202BU
是否Rohs认证: 不符合
生命周期:Obsolete
零件包装代码:D2PAK
包装说明:TO-263, 5 PIN
针数:4
Reach Compliance Code:not_compliant
ECCN代码:EAR99
HTS代码:8542.39.00.01
风险等级:5.69
可调性:ADJUSTABLE
最大回动电压 1:0.75 V
标称回动电压 1:0.5 V
JESD-30 代码:R-PSSO-G5
JESD-609代码:e0
长度:10.363 mm
最大电网调整率 (%/V):0.016
最大负载调整率 (%):0.3%
湿度敏感等级:3
功能数量:1
输出次数:1
端子数量:5
工作温度TJ-Max:125 °C
工作温度TJ-Min:-40 °C
最大输出电流 1:0.4 A
最大输出电压 1:26 V
最小输出电压 1:1.24 V
封装主体材料:PLASTIC/EPOXY
封装代码:TO-263
封装等效代码:SMSIP5H,.6,67TB
封装形状:RECTANGULAR
封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):240
认证状态:Not Qualified
调节器类型:ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR
座面最大高度:4.902 mm
子类别:Other Regulators
表面贴装:YES
技术:BIPOLAR
端子面层:Tin/Lead (Sn85Pb15)
端子形式:GULL WING
端子节距:1.7 mm
端子位置:SINGLE
处于峰值回流温度下的最长时间:30
宽度:8.7755 mm
Base Number Matches:1
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