LT1573 Low Dropout PNP Regulator Driver
FEATURES
s s
DESCRIPTIO
s
s s s s s s
Low Cost Solution for High Current, L...
LT1573 Low Dropout
PNP Regulator Driver
FEATURES
s s
DESCRIPTIO
s
s s s s s s
Low Cost Solution for High Current, Low Dropout
Regulators Fast Transient Response Needs Much Less Bulk Capacitance Latching Overload Protection Minimizes Heat Sink Size Precision Output Voltage (1%) Single Supply Operation: VIN = 2.8V to 10V Small Surface Mount Package Capable of Very Low Dropout Voltage (<0.2V) Fixed or Adjustable Outputs Shutdown
The LT ®1573 is a
regulator driver IC designed to provide a low cost solution for applications requiring high current, low dropout and fast transient response. When combined with an external
PNP power
transistor, this device provides load current up to 5A with dropout voltages as low as 0.35V. The LT1573 circuitry is designed for extremely fast transient response. This greatly reduces bulk storage capacitance when the
regulator is used in applications with fast, high current load transients. To keep cost and complexity low, the LT1573 uses a new time-delayed latching overcurrent protection technique that requires no external current sense resistor. Base drive is limited for instantaneous protection, and a time-delayed latch protects the
regulator from continuous short circuits. The LT1573 is available as an adjustable
regulator with an output range of 1.27V to 6.8V and with fixed output voltages of 2.5V, 2.8V and 3.3V. Output accuracy is better than 1% to meet the critical regulation requirement of fast microprocessors. A special 8-pin, fused-lead ...