MP6545

– 45V, 2.5A, SIMPLE THREE-PHASE POWER STAGE

MP6545 Rev. 1.1

MonolithicPower.com

3

5/12/2023

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PIN FUNCTIONS

Pin #

(QFN)

Pin #

(TSSOP)

Name

Description

1, 8

4, 11

VIN

Input supply voltage. Decouple the VIN pin to ground using a minimum

100nF ceramic capacitor. Additional bulk capacitance may be required.

2

5

OUT1

Output terminal 1.

3, 6

6, 9

PGND

Power ground for half H-bridge outputs.

4

7

OUT2

Output terminal 2.

5

8

OUT3

Output terminal 3.

11, 24

14, 28

GND

Signal ground.

12

15

VREG

Internal regulator. Connect a 1µF, 16V ceramic capacitor (X7R) to ground.

13

16

nRESET

Reset input. Pull the nRESET pin active low to reset the protection circuits and

disable the outputs. This pin has an internal pull-down resistor.

14

17

nSLEEP

Sleep mode input. Pull the nSLEEP pin logic low to enter low-power sleep

mode. This pin has an internal pull-down resistor.

15

18

nFAULT

Fault indication. The nFAULT pin is an open-drain output. If used, nFAULT

requires an external pull-up resistor. nFAULT is in logic low under fault

conditions.

16

20

HS1

High input turns on the OUT1 high-side MOSFET (HS FET). The HS1 pin

has an internal pull-down resistor.

17

21

LS1

High input turns on the OUT1 low-side MOSFET (LS FET). The LS1 pin has

an internal pull-down resistor.

18

22

HS2

High input turns on the OUT2 HS-FET. The HS2 pin has an internal pull-

down resistor.

19

23

LS2

High input turns on the OUT2 LS-FET. The LS2 pin has an internal pull-down

resistor.

20

24

HS3

High input turns on the OUT3 HS-FET. The HS3 pin has an internal pull-

down resistor.

21

25

LS3

High input turns on the OUT3 LS-FET. The LS3 pin has an internal pull-down

resistor.

25

1

CPA

Charge pump capacitor. Connect a 100nF ceramic capacitor that is rated for

VIN between the CPA and CPB pins.

26

2

CPB

27

3

VCP

Charge pump output. The VCP pin requires a 1µF, 16V ceramic capacitor to

VIN.