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MA5609

Major Power Technology Co., Ltd.

Rev.1.3 Apr. 12 , 2017

36V Synchronous Buck Converter With CC/CV



GENERAL DESCRIPTION

MA5609 is a wide input voltage, high efficiency Active CC step-down DC/DC converter that

operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode.

MA5609 provides up to 3.5A output current at 160kHz switching frequency. 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 an

SOP8L-EP(Exposed pad) package, provides a very compact solution with minimal external

components.



FEATURES

- Wide 8V to 36V Operating Input Range

- Integrated 75/45m

Ω 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

C1

4.7

μF

35V

40k

10k

VOUT+

5V 3A

C6

0.1

μF

IN

PGND

GND

SW

CS

FB

V

30m

L1

33

μH

C2

R1

R2

BS

C5

10nF

MA5609

R5

24

10

μF

10V

PAD

C7

470

μF

16V

C8

RSEN

VOUT-

CFB

3.3nF

GND

100

μF

35V

Ω

Ω))