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參數(shù)資料
| 型號： | Si9172 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | PSM Buck Converter with Dynamic Adjustable Output and Bypass Capability(帶動態(tài)可調(diào)輸出和旁路工作模式的PSM步降轉(zhuǎn)換器) |
| 中文描述： | 掩模降壓轉(zhuǎn)換器動態(tài)可調(diào)輸出和繞道能力（帶動態(tài)可調(diào)輸出和旁路工作模式的掩模步降轉(zhuǎn)換器） |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 38K |
| 代理商： | SI9172 |
Si9172
Vishay Siliconix
New Product
Document Number: 71379
S-02890—Rev. A, 21–Dec-00
www.vishay.com
1
PSM Buck Converter with Dynamic Adjustable Output and
Bypass Capability
2.7-V to 6-V Input Voltage Range
Dynamic Adjustable 1.5-V to 3.6-V Output.
Power Conversion Efficiency of 95% at 170-mA Load
Selectable Pulse Skipping Modulation (PSM) or
Bypass Mode (BP) Operation
Bypass for up to 800-mA Load
Integrated MOSFET with Low External Part Count
Low Quiescent Current–110 A/250 A (BP/PSM)
Shutdown Current <1 A
Integrated UVLO and POR
Integrated Soft-Start
Over Temperature Protection
MSOP-10 Package
Cellular Phones, Cordless Phones
Computer Point of Use, Notebook
PDAs
Battery Powered Devices
The Si9172 is a dual-mode power adjustable output converter.
When it is set to PSM mode, the Si9172 operates as a pulse-
skipping-modulation controlled step-down (buck) converter
with a dynamically adjustable output of 1.5 V to 3.6 V. It has an
integrated MOSFET, capable of supplying a minimum 170-mA
load current with a 1.5- H inductor. The output voltage is
adjusted by the analog dc signal at the ADJ pin. The typical
conversion efficiency is above 90%. A logic high at the
BP/PSM pin puts the Si9172 in bypass mode. The main PMOS
buck switch is forced to turn on at 100% duty cycle, overriding
the FB signal. The voltage differential between input and
output is the resistive voltage drop on the internal PMOS and
the inductor. The Si9172 guarantees to deliver 800-mA load in
bypass mode with a typical 95% efficiency.
The Si9172 is available in MSOP-10 package. In order to
satisfy the stringent ambient temperature requirements, the
Si9172 is rated to handle the industrial temperature range of
–25 C to 85 C.
V
IN
ON/OFF
ENABLE
BP/PSM
ADJ
SI9172
L
X
GND
F
B
REF
1
2
3
4
5
10
9
8
7
6
V
OUT
V
IN
BP/PSM
V
OUT
V
ADJ
3.6 V
1.5 V
0.4 V
2.5 V
MSOP-10
V
IN
L
X
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| SI9181DB | Si9181DB/Si9182DB Demonstration Board |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI9172BH-T1 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 PSM Buck Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| SI9172BH-T1-E3 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 PSM Buck Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| SI9172DB | 功能描述:電源管理IC開發(fā)工具 SI9172 Demo Board RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| SI9174 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:High Performance Step-Down DC-DC Converter With Dynamically Adjustable Output Voltage |
| SI9174DH-T1 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 600mA CMOS PWM/PSM Buck Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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