BD9139MUV-E2

General Description

The  BD9139MUV  is  ROHM’s  high  efficiency

step-down switching regulator designed to produce a

voltage as low as 0.8V from a supply voltage of

5.5V/3.3V. It offers high efficiency by using pulse skip

control technology and synchronous switches, and

provides fast transient response to sudden load

changes by implementing current mode control.

Features

 Fast Transient Response because of Current Mode

PWM Control System.

 High Efficiency for All Load Ranges because of

Synchronous Switches (Nch/Nch FET) and SLLM TM

(Simple Light Load Mode)

 Soft-Start Function

 Thermal Shutdown and UVLO Functions

 Short-Circuit Protection with Time Delay Function

 Shutdown Function

Applications

Power Supply for LSI including DSP, Microcomputer

Key Specifications

 Input Voltage Range:  2.7V to 5.5V

 Output Voltage Range:  0.8V to 3.3V

 Output Current:  3.0A (Max)

 Switching Frequency:  1MHz(Typ)

 High Side FET ON-Resistance:  100mΩ(Typ)

 Low Side FET ON-Resistance:  80mΩ(Typ)

 Standby Current:  0μA (Typ)

 Operating Temperature Range:  -40°C to +105°C

规格书BD9139MUV-E2