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FEATURES

· 300mA Continuous Output Current

· Low Side or High Side Switch

Configuration

· 8V to 65V Operation

· Overload and Short Circuit Protection

· Power Interruption Protection

· +6V Regulated Voltage

· 2mA Quiescent Current

· Programmable Overcurrent and

Power Interruption Protection

· 1% to 30% Programmable Input

Comparator Hysteresis (on UC37132)

· Low and High Side Internal High

Current Clamps When Driving

Inductive Loads

DESCRIPTION

The UC37131, UC37132 and UC37133 are a family of smart power

switches which can drive resistive or inductive loads from the high side or

low side.

The UC37132 is available in 14 pin (DIP), 16 pin (SOIC), or 20 pin (CLCC)

packages and can accommodate both low side (load to VCC) or high side

(load to GND) configurations. The UC37131 and UC37133 are exclusively

for a low side or a high side configuration respectively and both are available

in an 8 pin package. Both high side and low side configurations provide

high current switching with low saturation voltages which can drive resistive

or inductive loads.

The input to the switch is driven by a low voltage signal, typically 5V. Additionally,

UC37132 features adjustable hysteresis. The output of the device

can switch a load between 8V and 65V. Output current capability is 300mA

continuous or 700mA peak.

The device also has inherent smart features that allow for programmable

turn-on delay in enabling the output following startup. The same capacitor

that specifies the turn-on delay is also used to program a VCC power interruption

time. If VCC drops below a threshold for a time specified by this capacitor,

the output is turned off and a new turn-on delay will be re-triggered.

Similarly, if high current persists longer than the response delay, the output

driver will operate in a very low duty cycle mode to protect the IC.