SC2441AEVB(2006) 데이터 시트보기 (PDF) - Semtech Corporation

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SC2441AEVB
(Rev.:2006)

1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter

Semtech Corporation 

POWER MANAGEMENT

SC2441A

Vcc

4.5V

1.25V

3.3V

VSOFT-START

Enable Hiccup

1.85V

VCOMP

PWM

VOUT

Figure 6a. SC2441A Start-up Timing Diagram

VSOFT-START-CAP

VO

70% X VO Setpoint

0.8V 1.25V

3.3V

Enable

Hiccup

1.85V

VCOMP

VO

PWM

0.5V

Disable Hiccup

restart

Figure 6b. SC2441A Overload Hiccup Operation Timing Diagram

 2006 Semtech Corp.

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