Copyright

© ANPEC Electronics Corp.

Rev. A.1 - Dec., 2012

APW8820

www.anpec.com.tw

10

Pin Description (Cont.)

PIN

TQFN4x4-24 QFN3x3-20

NAME

Function

21

18

PHASE5

This pin is the return path for the high-side gate driver of PWM5. Connecting this pin to

the high-side MOSFET source and connecting a capacitor to BOOT5 for the bootstrap

voltage.

22

19

SYSPOK

PWM5 and PWM3 Power Good Output Indicator. This pin used to indicate the status of

the PWM5 and PWM3. If an fault even detected on FB5, this pin represents a 100Ω

resistance. If an fault even detected on FB3, this pin represents a 45Ω resistance.

represents high impedance.

23

-

BYP

LDO5. Connecting this pin to output of PWM5.

24

20

CSN5

Negative Input of current sensing amplifier for PWM5. This pin combined with CSP5

senses the inductor current through an RC network.

Exposed

Pad

Exposed

Pad

GND

Signal and Power Ground.