SC483 Dual Synchronous Buck Pseudo Fixed Frequency Power Supply Controller

Semtech Corporation

Description

POWER MANAGEMENT .
Dual Synchronous Buck Pseudo Fixed Frequency Power Supply Controller Features Constant on-time for fast dynamic response Programmable VOUT range = 0.

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Datasheet Specifications

Part number: SC483
Manufacturer: Semtech Corporation
File Size: 517.61 KB
Datasheet: SC483_SemtechCorporation.pdf
Description: Dual Synchronous Buck Pseudo Fixed Frequency Power Supply Controller

Features

* Constant on-time for fast dynamic response Programmable VOUT range = 0.5
* VCCA VBAT Range = 1.8V
* 25V DC current sense using low-side RDS(ON) sensing or sense resistor Resistor programmable frequency Cycle-by-cycle current limit Digital soft-start Separate PSAVE option for each swi

Applications

* Notebook computers CPT I/O supplies Handheld terminals and PDAs LCD monitors Network power supplies 5VSUS VBAT D1 R1 RTON1 R2 22 10R 23 VOUT1 R3 25 R5 26 27 R7 C5 1nF C6 1uF VSSA1 5VSUS D2 R8 RTON2 R9 8 10R 9 VOUT2 R10 11 R12 12 13 R14 C11 1nF C12 1uF VSSA2 14 FB2 PGD2 VSSA2 VDDP2 DL2 PGND2 17 Q4 1

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SC483 Dual Synchronous Buck Pseudo Fixed Frequency Power Supply Controller Semtech Corporation

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