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