CS5301 datasheet(9/20 Pages) ONSEMI

Teilenummer	CS5301

Bauteilbeschribung	Three-Phase Buck Controller with Integrated Gate Drivers and Power Good

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CS5301

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PACKAGE PIN DESCRIPTION

PACKAGE PIN #

PIN SYMBOL

FUNCTION

1

COMP

Output of the error amplifier and input for the PWM

comparators.

2

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 bias current of the

VFB pin and the resistor value determine output voltage offset

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

3

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.

4–6

CS1–CS3

Current sense inputs. Connect current sense network for the

corresponding phase to each input.

7

CSREF

Reference for current sense amplifiers. To balance input

offset voltages between the inverting and noninverting inputs

of the Current Sense Amplifiers, connect a resistor between

CSREF and the output voltage. The value should be 1/3 of

the value of the resistors connected to the CSx pins.

8

PWRGD

Power Good Output. Open collector output goes low when

CSREF is out of regulation.

9–13

VID4–VID0

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

3.3 V if left open.

14

PWRGDS

Power Good Sense. Connect to Output.

15

ILIM

Sets threshold for current limit. Connect to reference through

a resistive divider.

16

REF

Reference output. Decouple with 0.1

µF to LGND.

17

LGND

Return for internal control circuits and IC substrate connection.

18

VCCH3

Power for GATE(H)3.

19

Gate(H)3

High side driver #3.

20

GND3

Return for #3 drivers.

21

Gate(L)3

Low side driver #3.

22

VCCL23

Power for GATE(L)2 and GATE(L)3.

23

Gate(L)2

Low side driver #2.

24

GND2

Return for #2 driver.

25

Gate(H)2

High side driver #2.

26

VCCH12

Power for GATE(H)1 and GATE(H)2. UVLO Sense for High

Side Driver supply connects to this pin.

27

Gate(H)1

High side driver #1.

28

GND1

Return #1 drivers.

29

Gate(L)1

Low side driver #1.

30

VCCL1

Power for GATE(L)1.

31

VCCL

Power for internal control circuits and UVLO Sense for Logic.

32

ROSC

A resistor from this pin to ground sets operating frequency

and VFB bias current.

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