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http://www.union-ic.com

Rev.01 Dec.2012

2/6

UM3865P

Typical Application Circuit

COMPONENTS

R1

Pull-Up Resistor

Typical 20kΩ to 1MΩ*

R2

Optional Slew-Rate Control

Typical 0 to 50kΩ

C1

Optional Slew-Rate Control

Typical 1000pF

*Minimum R1 value should be at least 10×R2 to ensure Q1 turn-on.

Note: For R2 switching variations with other VIN/R1 combinations See Typical Characteristics

Switching Variation

(R2@VIN=2.5V,R1=20kΩ)

0

10

20

30

40

50

02

4

6

8

10

R2(kΩ)

td(on)

tr

td(off)

tf