RH1573K - Radiation Hardened Low Dropout PNP Regulator Driver

The RH1573 is a regulator driver IC designed to provide a solution for applications requiring high current, low dropout and fast transient response. When driving an external PNP power transistor, this device provides load current up to 5A with a dropout voltage as low as 0.35V. The RH1573 circuitry is designed for extremely fast transient response. This greatly reduces the output capacitance requirements when the regulator is used in applications with fast, high current load transients. The RH1573 uses a time-delayed latching overcurrent protection technique that requires no external sense resistor. Base drive is limited for instantaneous protection, and a time-delayed latch protects the regulator from continuous short circuits.

Linear Technology partners with third party vendors who assemble and test packaged products with LTC RH Dice inside.

Features

MIL-PRF-38535 Class V Compliant Dice
Drives External PNP Transistor
Output Currents up to 5A
Typical Dropout Voltage 0.22V at 2.5A
Fast Transient Response Reduces Output Capacitance
Latching Overload Protection
Precision Output Voltage: ±2% after 200Krad TID exposure
Single Supply Operation: VIN = 2.8V to 10V
Shutdown
Total Ionizing Dose (TID) Tolerance, per TM1019.8, MIL-STD-883:- 200kRad (Si), per condition A at 50Rads(Si)/sec- 50kRad (Si), per condition D at 10mRads(Si)/sec- ELDRS Pass 50kRad(Si)
Displacement Damage Defect (DDD) up to 1E12 Neutrons/cm2