UC2834

· 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

Input Supply Voltage, VIN + . . . . . . . . . . . . . . . . . . 40V
Driver Current . . . . . . . . . . . . . . . . .. . . . . . . . . . 400mA
Driver Source to Sink Voltage . . . . . . . . . . . . . . . . . 40V
Crowbar Current . . . . . . . . . . . . .  . . . . . . . . . . -200mA
+1.5V Reference Output Current . .  . . . . . . . . . . -10mA
Fault Alert Voltage . . . . . . . . . . . .  . . . . . . . . . . . . . 40V
Fault Alert Current . . . . . . . . . . . . . . . . . . . . . . . . 15mA
Error Amplifier Inputs . . . . . . . . . . .. . . . . . -0.5V to 35V
Current Sense Inputs . . . . . . . . . . . . . . . . -0.5V to 40V
O.V. Latch Output Voltage . . . . . . .. . . . . . -0.5V to 40V
O.V. Latch Output Current . . . . . .. . . . . . . . . . . . 15mA
Power Dissipation at TA = 25°C . . . . . . . . . . . 1000mW
Power Dissipation at TC = 25°C. . .. . . . . . . . . 2000mW
Operating Junction Temperature . .. . -55°C to +150°C
Storage Temperature. . . . . . . . . . . . . -65°C to +150°C
Lead Temperature (soldering, 10 seconds). . . . . 300°C

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.