MPQ9840 – 36V, 3.5A, LOW IQ, SYNC STEP-DOWN CONVERTER, AEC-Q100

MPQ9840 Rev. 1.02

www.MonolithicPower.com

29

7/1/2020

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© 2020 MPS. All Rights Reserved.

TYPICAL APPLICATION CIRCUITS (continued)

Figure 10: VOUT = 3.3V, FSW = 2.2MHz

10μF

C1A

0.1μF

C1C

100kΩ

R1

0.1μF

C5

2.2μH

L1

22μF

C2A

5V/3.5A

EN

VOUT

10μF

C1B

SW

3, 10

EN

5

VIN

2

FB

15

VCC

12

BST

11

PGND

PG

7

U1

1μF

C4

100kΩ

R5

PG

GND

13kΩ

R4

VIN

GND

3.3V-36V

14

SS

AGND

68.1kΩ

R3

16

FREQ

BIAS

SYNC

6

PHASE

1

8

4.7nF

C3

R2

SYNC

PHASE

33kΩ

22μF

C2B

10pF

C6

0.1μF

C1D

C7

0.1uF

R6

10Ω

Figure 11: VOUT = 5V, FSW = 2.2MHz