UC3833DWTR Description

Precision linear regulators from the UC2832 and UC3833 series come with all the control features needed to create very low dropout linear regulators.

They also have a novel duty-ratio current limitation approach, which limits the average power consumption of the external pass transistor during fault conditions while providing peak load capacity. A gated-astable timer is enabled when the load current reaches a precisely defined threshold, switching the regulator's pass device on and off at an externally controllable duty-ratio. The output current is restricted to a value only slightly greater than the duty-ratio timer's trip threshold when the pass element is turned on. On the UCx832, the constant-current-limit can be programmed to enable a larger peak current during the pass device's on-time.

UC3833DWTR Features

• Precision 1% Reference

• Over-Current Sense Threshold Accurate to 5%

• Programmable Duty-Ratio Over-Current Protection

• 4.5 V to 36 V Operation

• 100mA Output Drive, Source, or Sink

• Under-Voltage Lockout

UC3833DWTR Applications

• Power Management

• Consumer Electronics

• Portable Devices

• Industrial