FEATURES

· Minimum VIN - VOUT Less Than

0.5V At 5A Load With External

Pass Device

· Equally Usable For Either Positive

or Negative Regulator Design

· Adjustable Low Threshold Current

Sense Amplifier

· Under And Over-Voltage Fault Alert

With Programmable Delay

· Over-Voltage Fault Latch With

100mA Crowbar Drive Output

DESCRIPTION

The UC1834 family of integrated circuits is optimized for the design of low

input-output differential linear regulators. A high gain amplifier and 200mA

sink or source drive outputs facilitate high output current designs which use

an external pass device. With both positive and negative precision references,

either polarity of regulator can be implemented. A current sense amplifier

with a low, adjustable, threshold can be used to sense and limit

currents in either the positive or negative supply lines.

In addition, this series of parts has a fault monitoring circuit which senses

both under and over-voltage fault conditions. After a user defined delay for

transient rejection, this circuitry provides a fault alert output for either fault

condition. In the over-voltage case, a 100mA crowbar output is activated.

An over-voltage latch will maintain the crowbar output and can be used to

shutdown the driver outputs. System control to the device can be accommodated

at a single input which will act as both a supply reset and remote

shutdown terminal. These die are protected against excessive power dissipation

by an internal thermal shutdown function.