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MA5608

Major Power Technology Co., Ltd.

Rev.1.1 Apr.12, 2017

40V5A Synchronous Buck Converter With 2CH CC/CV



GENERAL DESCRIPTION

The MA5608 is a monolithic synchronous buck regulator. The device integrates internal high

side and external low side power MOSFETs, and provides 5A of continuous load current over a

wide input voltage. Current mode control provides fast transient response and cycle-by-cycle

current limit.

An internal soft-start prevents inrush current at turn-on, This device available in SOP8L-EP

(Exposed pad) package, provides a very compact solution with minimal external components.



FEATURES

- Wide 8V to 40V Operating Input Range

- Integrated 45mΩ high side Power MOSFET Switches

- Output Adjustable from VFB(1.00V±2%) to 16V

- Up to 95% Efficiency

- Internal Soft-Start and Fixed 160KHz Frequency

- Stable with Low ESR Polymer Al-E-Capacitors

- Cycle-by-Cycle Over Current Protection

- Input Under/Over Voltage Lockout



APPLICATION CIRCUIT

IN

CS2

GND

LG

BS

SW

FB

CS1

C7

10μF

35V

C5

100nF

L1

33μH

R1

40kΩ

R2

10kΩ

C8

10μF

10V

VOUT=5V 4A

5V 1.6A

C6

0.1μF

MA5608

R5

0Ω

PAD(SENSE)

C2

470μF

16V

M1

NMOS

C1

220μF

35V

VIN=8~32V

38mΩ

RSEN1

VOUT1-

RSEN2

VOUT2-

55mΩ

5V 2.4A

CFB

3.3nF

40N04

C11

10μF

35V

RCL

0.1Ω

Option

VOUT=VFB × (1+R1/R2), VFB = 1.00V, R2 suggest 1k~40KΩ

ISEN = 2.63A (ISEN=VCS1(0.1V) / RSEN(38mΩ))