TC120 데이터 시트보기 (PDF) - Microchip Technology

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TC120

PWM/PFM Step-Down Combination Regulator/Controller

Microchip Technology 

TC120

FIGURE 3-3:

SHUTDOWN CONTROL CIRCUITS

TC120XX03

SHDN

ON OFF

47K

SHDN/SS

2N2222

CSS

4.7nF

a) Using an Open Collector Device

SHDN

ON OFF

VIN CMOS

Gate

R1

TC120XX03

SHDN/SS

CSS

b) Using a Complementary Output Device

VIN

TC120XX03

RSS

SHDN/SS

CSS

c) Shutdown Not Used – with Pull-Up

FIGURE 3-4:

SOFT START TIMING

Shutdown

Signal

OFF

TC120XX03

SHDN/SS

CSS

4.7nF

d) Shutdown Not Used – No Pull-Up

ON

0.65V

SHDN/SS 0V

X

1.5msec

DS21365C-page 8

 2001-2012 Microchip Technology Inc.

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