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MA5605

Major Power Technology Co., Ltd.

Rev.1.2 Apr. 12, 2017

36V 4.5A Synchronous Buck Converter With 2CH CC/CV



GENERAL DESCRIPTION

The MA5605 is a monolithic synchronous buck regulator. The device integrates internal high

side and external low side power MOSFETs, and provides 4.5A 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, and provides a very compact solution with minimal external components.



FEATURES

- Wide 8V to 36V Operating Input Range

- Integrated 75m

Ω high side Power MOSFET Switches

- Output Adjustable : VFB(1.00V±2%) .

- 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

10

μF

35V

C5

10nF

L1

33

μH

R1

40kΩ

R2

10kΩ

C8

10

μF

10V

VOUT=5V

5V 1.0A

C6

0.1

μF

MA5605

R5

24Ω

PAD(GND)

C2

470

μF

16V

M1

NMOS

C1

220

μF

35V

38mΩ

RSEN

VOUT1-

RSEN

VOUT2-

80mΩ

5V 2.4A

CFB

3.3nF

40N04S

Ω

Ω))