CS5332GDWR28 datasheet(8/20 Pages) ONSEMI

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CS5332

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PACKAGE PIN DESCRIPTION

PACKAGE PIN #

PIN SYMBOL

FUNCTION

28 Lead SO Wide

COMP

Output of the error amplifier and input for the PWM

comparators.

VFB

Voltage Feedback Pin. To use Adaptive Voltage Positioning

(AVP) select an offset voltage at light load and connect a

resistor between VFB and VOUT. The input current of the VFB

pin and the resistor value determine output voltage offset for

zero output current. Short VFB to VOUT for no AVP.

VDRP

Current sense output for AVP. The offset of this pin above the

DAC voltage is proportional to the output current. Connect a

resistor from this pin to VFB to set amount AVP or leave this

pin open for no AVP.

4−5

CS1−CS2

Current sense inputs. Connect current sense network for the

corresponding phase to each input.

CSREF

Reference for current sense amplifiers and input for Power

Good comparators. To balance input offset voltages between

the inverting and non−inverting inputs of the current sense

amplifiers, connect a resistor between CSREF and the output

voltage. The value should be 2/5 of the value of the resistors

connected to the CSx pins.

PWRGD

Power−Good Output. Open collector output goes low when

the CSREF is out of regulation.

8−12

VID4−VID0

Voltage ID DAC inputs. These pins are internally pulled up to

3.3 V if left open.

ILIM

Sets threshold for current limit. Connect to reference through

a resistive divider.

REF

Reference output. Decouple with 0.1 μF to LGND

VCCH2

Power for GATE(H)2.

GATE(H)2

High side driver #2.

GND2

Return for #2 drivers.

GATE(L)2

Low side driver #2.

VCCL2

Power for GATE(L)2.

Soft Start capacitor pin. The Soft Start capacitor controls both

Soft Start time and hiccup mode frequency. The COMP pin is

clamped below Soft Start during start up and hiccup mode.

LGND

Return for internal control circuits and IC substrate connection.

VCCH1

Power for GATE(H)1. UVLO Sense for High Side Driver sup-

ply connects to this pin.

GATE(H)1

High side driver #1.

GND1

Return for #1 drivers.

GATE(L)1

Low side driver #1.

VCCL1

Power for GATE(L)1.

VCCL

Power for internal control circuits. UVLO Sense for Logic

connects to this pin.

ROSC

A resistor from this pin to ground sets operating frequency

and VFB bias current.

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