SC1485 Dual Synchronous Buck Pseudo Fixed Frequency Power Supply Controller

Semtech Corporation

Description

www.DataSheet4U.com Dual Synchronous Buck Pseudo Fixed Frequency Power Supply Controller POWER MANAGEMENT .
The SC1485 is a dual output constant on synchronousbuck PWM controller intended for use in notebook computers and other battery operated portable devi.

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Datasheet Specifications

Part number: SC1485
Manufacturer: Semtech Corporation
File Size: 459.83 KB
Datasheet: SC1485_SemtechCorporation.pdf
Description: Dual Synchronous Buck Pseudo Fixed Frequency Power Supply Controller

Features

* include high efficiency and a fast dynamic response with no minimum on time. The excellent transient response, means that SC1485 based solutions will require less output capacitance than competing fixed frequency converters. The frequency is constant until a step in load or line voltage occurs at wh

Applications

* Notebook computers CPU I/O supplies Handheld terminals and PDAs LCD monitors Network power supplies Typical Application Circuit R1 VBAT R2 9 8 22 TON2 EN/PSV2 EN/PSV1 23 TON1 PGOOD1 27 13 PGOOD1 PGOOD2 VBAT SC1485 PGOOD2 EN2 EN1 DH2 LX2 20 19 R8 18 16 15 12 26 Q4 L2 VOUT2 Q3 + C8 Q1 6 5

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SC1485 Dual Synchronous Buck Pseudo Fixed Frequency Power Supply Controller Semtech Corporation

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