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TPS61170DRVR 参数 Datasheet PDF下载

TPS61170DRVR图片预览
型号: TPS61170DRVR
PDF下载: 下载PDF文件 查看货源
内容描述: 1.2A高电压升压转换器2x2mm2 QFN封装 [1.2A High Voltage Boost Converter in 2x2mm2 QFN Package]
分类和应用: 转换器稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管升压转换器
文件页数/大小: 27 页 / 953 K
品牌: TI [ TEXAS INSTRUMENTS ]
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SLVS789A – NOVEMBER 2007 – REVISED FEBRUARY 2008
1.2A High Voltage Boost Converter in 2x2mm
2
QFN Package
1
FEATURES
3-V to 18-V Input Voltage Range
High Output Voltage: Up to 38 V
1.2-A integrated Switch
1.2-MHz Fixed Switching Frequency
12 V at 300 mA and 24 V at 150 mA from 5-V
Input (Typical)
Up to 93% Efficiency
On-The-Fly
Output Voltage Reprogramming
Skip-Switching Cycle for Output Regulation at
Light Load
Built-in Soft Start
6-Pin, 2 mm
×
2 mm QFN Package
DESCRIPTION
The TPS61170 is a monolithic high voltage switching
regulator with integrated 1.2-A, 40-V power MOSFET.
It can be configured in several standard
switching-regulator topologies, including boost and
SEPIC. The device has a wide input-voltage range to
support applications with input voltage from multi-cell
batteries or regulated 5-V, 12-V power rails.
The TPS61170 uses a 1.2-MHz switching frequency,
allowing the use low-profile inductors and low-value
ceramic input and output capacitors. The external
loop compensation gives the user flexibility to
optimize loop compensation and transient response.
The device has built-in protection features, such as
pulse-by-pulse overcurrent limit, soft start and thermal
shutdown.
The feedback reference voltage of the FB pin is
1.229V. It can be lowered using a 1-wire digital
interface (Easyscale™ protocol) through the CTRL
pin. Alternatively, a pulse width-modulation (PWM)
signal can be applied to the CTRL pin. The duty cycle
of the signal reduces the feedback reference voltage
proportionally.
The TPS61170 is available in a 6-pin 2 mm
×
2 mm
QFN package, allowing a compact power-supply
solution.
APPLICATIONS
5-V to 12-V and 24-V, 12-V to 24-V Boost
Converter
Buck Boost Regulation Using SEPIC Topology
ADSL Modems
VIN 5 V
L1
10
m
H
D1
VOUT 12 V/ 300 mA
C1
4.7
m
F
TPS 61170
VIN
CTRL
COMP
SW
FB
GND
C2
4.7
m
F
R1
87.6 kW
R3
10 kW
C3
680 pF
R2
10 kW
L1: TOKO#A915_Y-100M
C1: Murata GRM188R61A475K
C2: Murata GRM21BR61E475K
D1:
ONsemi MBR0540T1
*R3, C3: Compensation RC network
Figure 1. Typical Application
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007–2008, Texas Instruments Incorporated