GENERAL DESCRIPTION

The MA5640 is a wide input voltage range synchronous buck converter which support

CC/CV mode operating. This device integrates low RDS(ON) P-MOS + N-MOS architecture and

can provide high efficiency, maximum 100 duty voltage conversion. The MA5640 drives up

to 4A continuous output current at 240KHz switching frequency. Current mode control

provides fast transient response and the internal soft-start function prevents inrush current at

power on.

The internal protection functions include input under voltage lock-out(UVLO), input over

voltage lock-out(OVLO), cycle-by-cycle current limit and thermal shutdown protection. The

MA5640 is available in SOP8L-EP(Exposed Pad) package, provides a very compact solution

with minimal external components.

FEATURES

- 8V to 40V Wide Operating Input Voltage Range

- Integrated 75mΩ P-type MOSFET + 45mΩ N-type MOSFET Switches

- Output Voltage Adjustable: VFB(1.00V ± 2)

- Up to 4A Output Current

- CC/CV Mode Control

- Maximum 100 Duty Operating

- Fixed 240KHz Frequency

- Cycle-by-Cycle Current Limit

- Input Under / Over Voltage Lock-Out (UVLO / OVLO)

- Thermal Shutdown Protection (OTP)

- Available in SOP8L-EP Package