UC2832DW                     DESCRIPTION

The UC2832 and UC3833 series of precision linear regulators include all the control functions required in the design of very low dropout linear regulators Additionally, they feature an innovative duty-ratio current limiting technique which provides peak load capability while limiting the average power dissipation of the external pass transistor during fault conditions.When the load cur rent reaches an accurately programmed threshold a gated- as table timer is enabled. which switches the regulator’s pass device off and on at an externally programmable duty-ratio. During the on-time of the pass element the out current is limited to a value slightly higher than the trip threshold of the duty-ratio timer.The constant-current-limit is programmable on the UCx832 to allow higher peak current during the on-time of the pass device.With duty-ratio control, high initial load demands and short circuit protection may both be accommodated without extra heat sinking or fold back current limiting.Additionally if the timer pin is grounded the duty-ratio timer is disabled and the IC operates in constant-voltage/constant-current regulating mode

UC2832DW                 FEATURES

Precision 1% Reference

Over-Current Sense Threshold

Accurate to 5%

Programmable Duty-Ratio

Over-Current Protection

4.5Vto36VOperation

·100mA Output Drive,Sourceor

Sink

Under-Voltage Lockout

Additional Features of the UC2832 series:

Adjustable Current Limit to Current Sense Ratio

Separate+ViN terminal

Programmable Driver Current Limit

· Access to VREF and E/A(+) Logic-Level Disable Input                                                                                                                                                                                                                              

UC2832DW              APPLICATIONS

·Point-of-Load Synchronous Buck Converter

for Applications in NetworkingTelecomand Computing Systems

·Optimized for Control FETApplications