UC2832TDWEP Description

All the control features necessary for the creation of very low dropout linear regulators are included in the UC2832 family of precision 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 UC2832, the constant-current-limit can be programmed to allow a larger peak current during the pass device's on-time.

High initial load requirements and short circuit protection can both be supported via duty-ratio management without the need for additional heat sinking or foldback current limiting. The duty-ratio timer is also deactivated and the IC runs in constant-voltage/constant-current regulating mode if the timer pin is grounded.

UC2832TDWEP Features

• Extended Temperature Performance of –40°C to 105°C

• Enhanced Diminishing Manufacturing Sources (DMS) Support

• Enhanced Product Change Notification

• Qualification Pedigree?

• Precision 1% Reference

• Over-Current Sense Threshold Accurate to 5%

• Programmable Duty-Ratio Over-Current Protection

UC2832TDWEP Applications

• Power Management

• Consumer Electronics

• Portable Devices

• Industrial