SI4812DY-T1-E3 Vishay Semiconductors, SI4812DY-T1-E3 Datasheet

SI4812DY-T1-E3

Manufacturer Part Number

SI4812DY-T1-E3

Description

Manufacturer

Vishay Semiconductors

Datasheets

1.SI4812DY-T1-E3.pdf (15 pages)

2.SI4812DY-T1-E3.pdf (5 pages)

3.SI4812DY-T1-E3.pdf (5 pages)

Specifications of SI4812DY-T1-E3

Case

SOP8

Date_code

09+

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

SI4812DY-T1-E3

Manufacturer:

VISHAY

Quantity:

1 544

Company:

Meier Automation Equipment Co., Limited

Part Number:

SI4812DY-T1-E3

Manufacturer:

VISHAY/威世

Quantity:

20 000

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DESCRIPTION

The Si9135 is a current-mode PWM and PSM converter

controller, with two synchronous buck converters (3.3 V and

5 V) and a flyback (non-isolated buck-boost) converter (12 V).

Designed for portable devices, it offers a total five power

outputs (three tightly regulated dc/dc converter outputs, a

precision 3.3-V reference and a 5-V LDO output). It requires

minimum external components and is capable of achieving

conversion efficiencies approaching 95%.

Document Number: 70817

S-40806—Rev. C, 26-Apr-04

FEATURES

D Up to 95% Efficiency

D 3% Total Regulation (Each Controller)

D 5.5-V to 30-V Input Voltage Range

D 3.3-V, 5-V, and 12-V Outputs

D 200-kHz/300-kHz Low-Noise Frequency Operation

D Precision 3.3-V Reference Output

D 30 mA Linear Regulator Output

D SMBUS Interface

FUNCTIONAL BLOCK DIAGRAM

SMBUS Clock Line

SMBUS Data Line

(5.0 V)

+3.3 V

SMBus Multi-Output Power-Supply Controller

Regulator

Linear

SMPS

3.3-V

5-V

On/Off Control

12-V SMPS

D High Efficiency Pulse Skipping Mode Operation at

D Only Three Inductors Required*No Transformer

D LITTLE FOOT

D Internal Soft-Start

D Synchronizable

D Minimal External Control Components

D 28-Pin SSOP Package

Reference

Light Load

Voltage

SMPS

3.3-V

5-V

Along with the SMBUS interface, the Si9135 provides

programmable output selection capability.

The Si9135 is available in both standard and lead (Pb)-free

28-pin SSOP packages and specified to operate over the

extended commercial (0_C to 90_C) temperature range.

Optimized Output Drivers

Vishay Siliconix

(+3.3 V)

+5 V

+12 V

REF

www.vishay.com

Si9135

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