DESCRIPTION
The L296 andL296P are stepdownpowerswitching regulators delivering 4 A at a voltage variable from 5.1 V to 40 V. Featuresof the devices includesoft start, remoteinhibit, thermal protection, a reset output for microprocessors and a PWM comparator input for synchronization in multichip configurations. Efficient operation at switching frequencies up to 200 KHz allows a reduction in the size and cost of external filter components. A voltage sense input and SCR drive output are provided for optional crowbar overvoltage protection with an external SCR. June 2000 1/22 L296 - L296P PIN FUNCTIONS N° 1 Name CROWBAR INPUT Function Voltage Sense Input for Crowbar Overvoltage Protection. Normally connected to the feedback input thus triggering the SCR when V out exceeds nominal by 20 %. May also monitor the input and a voltage divider can be added to increase the threshold. Connected to ground when SCR not used. Regulator Output Unrergulated Voltage Input. An internal Regulator Powers the L296s Internal Logic.
STMicroelectronics
