TC120 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

TC120

PWM/PFM Step-Down Combination Regulator/Controller

Microchip Technology 

FIGURE 3-5:

USING EXTERNAL TRANSISTOR SWITCH

VIN

TC120

VIN

LX

EXTW

EXT

TC120XX03

CPC

GND

SHDN/SS

CSS

4.7 nF

SENSE

CIN

47μF

Tantalum

L1

22μH

IN5817

VOUT

COUT

47μF

Tantalum

FIGURE 3-6:

EXTERNAL (EXT) AND EXTENDED EXTERNAL (EXTW) SWITCHING

TRANSISTOR DRIVE OUTPUT

EXT

EXTW

100nsec

100nsec

 2001-2012 Microchip Technology Inc.

DS21365C-page 9

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