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LTM4601HV 参数 Datasheet PDF下载

LTM4601HV图片预览
型号: LTM4601HV
PDF下载: 下载PDF文件 查看货源
内容描述: 24V , 15A单片式降压稳压器,带有差分输出检测 [24V, 15A Monolithic Step Down Regulator with Differential Output Sensing]
分类和应用: 稳压器
文件页数/大小: 36 页 / 435 K
品牌: LINEAR [ LINEAR INTEGRATED SYSTEMS ]
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FEATURES
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LTC3613
24V, 15A Monolithic
Step Down Regulator with
Differential Output Sensing
DESCRIPTION
The LTC
®
3613 is a monolithic synchronous step-down
switching regulator capable of regulating outputs from 0.6V
to 5.5V with up to 15A output current. The controlled on-time
constant frequency valley current mode architecture allows for
both fast transient response and constant frequency switch-
ing in steady-state operation, independent of V
IN
, V
OUT
and
load. This also provides excellent current sharing capability.
Differential output voltage sensing along with a precision
internal reference combine to offer ±0.67% output regula-
tion, even if the output ground reference deviates from
local ground by 500mV. The switching frequency can be
programmed from 200kHz to 1MHz with an external resis-
tor. The switching frequency is also phase synchronizable
to an external clock in applications where switching noise/
EMI reduction is crucial.
Very low t
ON
and t
OFF
times allow for near 0% and near 100%
duty cycles, respectively. Voltage tracking soft start-up is
provided for tracking and sequencing applications. Safety fea-
tures include output overvoltage protection, programmable
current limit with foldback, and power good monitoring.
L,
LT, LTC, LTM, OPTI-LOOP Linear Technology and the Linear logo are registered trademarks
,
and Hot Swap and No R
SENSE
is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents including
5481178, 5487554, 6580258, 6304066, 6476589, 6774611.
Wide V
IN
Range: 4.5V to 24V;
V
OUT
Range: 0.6V to 5.5V at up to 15A
0.67% Output Voltage Accuracy
Controlled On-Time Valley Current Mode Architecture,
Excellent Current Sharing Capability
Frequency Programmable from 200kHz to 1MHz
and Synchronizable to External Clock
R
SENSE
or Inductor DCR Current Sensing With
Accurate Current Limit
Fast Transient Response
Differential Output Voltage Sensing Allowing 500mV
Common Mode Remote Ground
t
ON(MIN)
= 65ns; t
OFF(MIN)
= 105ns
Overvoltage Protection and Current Limit Foldback
Power Good Output Voltage Monitor
Voltage Tracking Start-Up
External V
CC
Input for Bypassing Internal LDO
Micropower Shutdown: I
Q
= 15μA
7mm
×
9mm 56-pin QFN Package
APPLICATIONS
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Distributed Power System
Point-of-Load Converters
Servers
TYPICAL APPLICATION
High Efficiency High Power Step-Down Converter
INTV
CC
PV
IN
SV
IN
LTC3613
V
OUT
PGOOD
SENSE
RUN
V
RNG
0.1μF
47pF
270pF
MODE/PLLIN
EXTV
CC
TRACK/SS
SENSE
+
Efficiency and Power Loss
vs Load Current
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
V
IN
= 12V
V
OUT
= 1.5V
0.1
10
1
LOAD CURRENT (A)
3613 TA01a
+
0.1μF
10Ω
1000pF
10Ω
0.47μH
82μF
V
IN
4.5V TO 24V
3.5
PULSE-SKIPPING MODE
3.0
2.5
FORCED
CONTINUOUS
MODE
2.0
1.5
1.0
0.5
0
POWER LOSS (W)
100k
1.5mΩ
15k
SW
0.1μF
BOOST
INTV
CC
10k
4.7μF
V
OUT
1.5V
15A
10
330μF
×2
0
0.01
21k
ITH
115k
RT
SGND
+
PGND
V
OSNS+
V
OSNS–
3613 TA01
3613fa
1