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SI9175, SI9175DM-T1-E3, SI9176

Table of contents:
Info of SI9175
Info of SI9175DM-T1-E3
Info of SI9176

SI9175, SI9175DM-T1-E3, SI9176 Selling Leads, Datasheet

MFG:Vishay Package Cooled:MLP33-10 D/C:2010+

SI9175, SI9175DM-T1-E3, SI9176 Datasheet download

Five Points

Part Number: SI9175

MFG: Vishay

Package Cooled: MLP33-10

D/C: 2010+

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SI9175DM-T1-E3 General Description

Si9175 datasheet

SI9176 General Description

The Si9176 is a high efficiency 600-mA step down converter with internal low on resistance power MOSFET switch and synchronous rectifier transistors. It is designed to convert one cell LiIon battery or three cell alkaline battery voltages to a dynamically adjustable dc output. The integrated high frequency error amplifier with internal compensation minimizes external components.

In order to insure efficient conversion throughout the entire load range, PWM (pulse width modulation), PSM (pulse skippingmode) or Automode can be selected. InPWMmode, 2-MHz switching permits use of small external inductor and capacitor sizes allowing one of the smallest solutions. PSMmode provides increased efficiency at light loads. 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 Si9176 is available in 10-pin MSOP and even smaller MLP33 packages and is specified to operate over the industrial temperature range of 40 to 85

SI9176 Maximum Ratings

Voltages Referenced to AGND = 0 V
V_IN, V_DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2 V
Lx, SD, MODE, FB, CREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . --0.3 to 6.2 V
(or to VDD +0.3 V whichever is less)
GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . --0.3 to +0.3 V
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . --65 to 125
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Power Dissipation (Package)a
10-pin MSOPb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .481 mW
10-pin MLP33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 915 mW
Thermal Impedance (JA)
10-Pin MSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135/W
10-Pin MLP33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71/W
Peak Inductor Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 A
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 7.4 mW/ above 85.
c. Derate 14 mW/ above 85.

SI9176 Features

` 2-MHz PWM Operation
` Integrated MOSFET Switches
` 2.6-V to 6.0-V Input Voltage Range
` Minimal Number of External Components
` Up to 96% conversion efficiency
` 600-mA Load Capability
` 100% Duty Cycle Allows Low Dropout
` Integrated Compensation Circuit
` Over-Current Protection
` Shutdown Current < 2 mA
` Thermal Shutdown
` Integrated UVLO
` 10-Pin MSOP and Space Saving MLP33 Packaging
` User Selectable PWM, PSM, or AUTO Mode
` PSM Frequency 20 kHz for Inaudible Harmonics

SI9176 Typical Application

· W-CDMA Cell Phone
· PDAs/Palmtop PCs
· LCD Modules
· Portable Image Scanners
· GPS Receivers
· Smart Phones
· MP3 Players
· 3G Cell Phone
· Digital Cameras

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