The UTC LM2937 is a positive voltage regulator capable of
supplying up to 500mA of load current. The use of a PNP power
transistor provid a low dropout voltage characteristic. With a
load current of 500mA the minimum input to output voltage
differential required for the output to remain in regulation is
tically 0.5V(1V guaranteed maximum over the full operating
temperature range). Special circuitry has been incorporated to
minimize the quicent current to tically only 10mA with a full
500mA load current when the input to output voltage differential is
greater than 3V.
The UTC LM2937 requir an output b capacitor for
stability. As with most low dropout regulators, the R of this
capacitor remains a critical dign parameter, but the LM2937
includ special compensation circuitry that relax R
requirements. The UTC LM2937 is stable for all R below
3Ω.This allows the use of low R chip capacitors.
Ideally suited for automotive applications, the UTC LM2937 will
protect itself and any load circuitry from reverse battery
connections, two-battery jumps and up to +60V/-50V load dump
transients. Familiar regulator featur such as short circuit and
thermal shutdown protection are also built in.
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