Power Management
FemtoBuck DC-DC Regulators and Controllers

Semtech SC2544

High Performance Wide Input Range Dual Synchronous Buck Controller

The SC2544 is a high performance dual PWM controller. It is designed to convert a wide ranged input voltage down to two independent output rails. The SC2544 support “peel off ” tracking for the two outputs at start up which means the two outputs ramp up together till the one with lower output level reaching the regulation.

Overview

Features

Independent dual-outputs
“Peel off “start up tracking Independent dual-outputs
Wide input voltage range: 4.5V~28V
Adjustable output voltage down to 0.75V
Flexible power sequencing with enable and power good output
Synchronous Buck topology with voltage mode control
Out of phase operation to reduce cost of input capacitor
10V internal regulator for gate driver to deliver high efficiency
Programmable switching frequency: 100kHz~300kHz
Full protection: UVLO, OVP and programmable OCP
No need for current sense resistor
Low shutdown current (100nA typical)
24 lead TSSOP and MLPQ packages
Fully WEEE and RoHS Compliant

Applications

Systems with 4.5V~28V input
LCDTV and PDPTV
Network and telecom systems

Packaging

TSSOP-24, MLPQ-24

Order Codes

SC2544MLTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only (MLPQ-24)
SC2544TSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only (TSSOP-24)