參數(shù)資料
型號(hào)： SI9175DH-T1
廠商： Vishay Intertechnology,Inc.
元件分類： DC/DC變換器
英文描述： High Performance Step-Down DC-DC Converter With Adjustable Output Voltage
中文描述： 高性能降壓型DC - DC，可調(diào)輸出電壓轉(zhuǎn)換器
文件頁數(shù)： 1/12頁
文件大?。?/td> 323K
代理商： SI9175DH-T1
Si9175
Vishay Siliconix
New Product
Document Number: 71728
S-21823—Rev. A, 07-Oct-02
www.vishay.com
1
High Performance Step-Down DC-DC Converter
With Adjustable Output Voltage
FEATURES
D
2-MHz PWM Operation
D
Integrated MOSFET Switches
D
2.6-V to 6.0-V Input Voltage Range
D
Minimal Number of External Components
D
Up to 96% conversion efficiency
D
600-mA Load Capability
D
100% Duty Cycle Allows Low Dropout
D
Integrated Compensation Circuit
D
Over-Current Protection
D
Shutdown Current < 2
m
A
D
Thermal Shutdown
D
Integrated UVLO
D
10-Pin MSOP and Space Saving MLP33 Packaging
D
Synchronizable to13-MHz Clock
D
User Selectable PWM, PSM, or AUTO Mode
D
PSM Frequency
≥
20 kHz for Inaudible
Harmonics
APPLICATIONS
D
W-CDMA Cell Phone
D
PDAs/Palmtop PCs
D
LCD Modules
D
Portable Image Scanners
D
GPS Receivers
D
Smart Phones
D
MP3 Players
D
3G Cell Phone
D
Digital Cameras
DESCRIPTION
The Si9175 is a high efficiency 600-mA step down converter
with internal low on resistance power MOSFET switch and
synchronous rectifier transistors. Itis designed to convertone
cell LiIon battery or three cell alkaline battery voltages to a
dynamically adjustable dc output.
frequency
error
amplifier
with
minimizes external components.
The integrated high
internal
compensation
In order to insure efficient conversion throughout the entire
load range, PWM (pulse width modulation), PSM (pulse
skipping mode)orAuto mode can beselected. In PWMmode,
2-MHz switching permits use of small external inductor and
capacitor sizes allowing
one of the smallest solutions
. To
minimize system noise, the switching frequency can be
synchronized to an external 13-MHz clock.
PSMmodeprovidesincreasedefficiencyatlightloads.InPSM
mode the oscillator frequency is kept above 20 kHz to avoid
audio band interference. When operating in Auto mode, the
converter automatically selects operating in either PWM or
PSM mode according to load current demand.
The Si9175 is available in 10-pin MSOP and even smaller
MLP33 packages and is specified to operate over the
industrial temperature range of –40
_
C to 85
_
C.
TYPICAL APPLICATIONS CIRCUIT
PWM/PSM/AUTO
ENABLE
13 MHz
BATTERY
LX
V
IN
SYNC
SD
MODE
PGND
FB
AGND
V
OUT
Si9175
2.2
m
H
C
OUT
4.7
m
F
C
IN
10
m
F
V
DD
R
2
R
1
REF
REF
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SI9175DH-T1-E3 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
SI9175DM-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
SI9175DM-T1-E3 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
SI9176 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:High Performance Step-Down DC-DC Converter With Adjustable Output Voltage
SI9176DB 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:High Performance Step-Down DC-DC Converter With Adjustable Output Voltage
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