UMC33167

DESCRIPTION

The UTC UMC33167 series are high performance fixed frequency

power switching regulators that contain the primary functions required

for dc-to-dc converters. This series was specifically designed to be

incorporated in step-down and voltage-inverting configurations with a

minimum number of external components and can also be used cost

effectively in step-up applications.

These devices consist of an internal temperature compensated

reference, fixed frequency oscillator with on-chip timing components,

latching pulse width modulator for single pulse metering, high gain

error amplifier, and a high current output switch.

Protective features consist of cycle-by-cycle current limiting,

undervoltage lockout, and thermal shutdown. Also included is a low

power standby mode that reduces power supply current to 36μA.

FEATURES

* Output Switch Current in Excess of 5.0A

* Fixed Frequency Oscillator (72kHz) with On-Chip Timing

* Provides 5.05V Output without External Resistor Divider

* Precision 2% Reference

* 0% ~ 95% Output Duty Cycle

* Cycle-by-Cycle Current Limiting

* Undervoltage Lockout with Hysteresis

* Internal Thermal Shutdown

* Operation from 7.5V ~ 40V

* Standby Mode Reduces Power Supply Current to 36μA

规格书UMC33167