VESTEL MB37, Service Manual

Page: 71 / 111

16.15 MP1583
16.15.1 General Description
The MP1583 is a step-down regulator with a built in internal Power MOSFET. It achieves
3A continuous output current over a wide input supply range with excellent load and line
regulation.
Current mode operation provides fast transient response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown.
Adjustable soft-start reduces the stress on the input source at turn-on. In shutdown mode
the regulator draws 20µA of supply current.
The MP1583 requires a minimum number of readily available external components to
complete a 3A step down DC to DC converter solution.
16.15.2 Features

3A Output Current

Programmable Soft-Start

100m Ω Internal Power MOSFET Switch

Stable with Low ESR Output Ceramic Capacitors

Up to 95% Efficiency

20µA Shutdown Mode

Fixed 385KHz frequency

Thermal Shutdown

Cycle-by-Cycle Over Current Protection

Wide 4.75 to 23V operating Input Range

Output Adjustable From 1.22 to 21V

Under Voltage Lockout

Available in 8 pin SOIC Package

3A Evaluation Board Available
16.15.3 Absolute Maximum Ratings