SC2441ITSTRT View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

SC2441ITSTRT

Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter

Semtech Corporation 

SC2441

POWER MANAGEMENT

Pin Descriptions

Supply Voltage for Both Step-down Controllers and the Low-side Gate Drivers. The boost

21

VCC

converter output is tied to VCC if VIN in not high enough to fully enhance the power MOSFET's

and the boost converter provides an auxiliary supply voltage for the step-down controllers. Tie

VCC to VIN if the boost converter is not needed.

22

GDL1

Gate Drive Output for the Low-side N-channel MOSFET of Output 1. Gate drive voltage

swings from ground to VCC.

23

GDH1

Gate Drive Output for the High-side N-channel MOSFET of Output 1. Gate drive voltage

swings from ground to VBST1.

24

PGND

Ground Supply of the High-side and the Low-side Gate Drivers of Both Step-down Controllers.

It is also the emitter of the boost switch.

25

BST1

Bootstrapped Supply for the High-side Gate Drive 1. Connect to a bootstrap capacitor and an

external diode as described in application information.

The Virtual Phase (Unloaded) Node of the First Step-down Converter. Used for "Combi"

26

VPN1

current sense only. This pin is left open when sensing current with a sense resistor at the

converter output.

27

PH3

Boost Switch Collector. Connect to a boost inductor and a rectifying diode.

28

PVIN

Power Supply Voltage for the Boost Switch and the Virtual Phase Node Drivers.

 2005 Semtech Corp.

7

www.semtech.com

Share Link: