LP38693 Datasheet | National Semiconductor

Description The LP38691/3 low dropout CMOS linear regulators provide tight output tolerance (2.0% typical), extremely low dropout voltage (250 m V @ 500m A load current, VOUT = 5V), and excellent AC performance utilizing ultra low ESR ceramic output capacitors. The low thermal resistance of the LLP, SOT-223 and T0-252 packages allow the full operating current to be used even in high ambient temperature environments. The use of a PMOS power transistor means that no DC base drive current is required to bias it allowing ground pin current to remain below 100 µA regardless of load current, input voltage, or operating temperature. Dropout Voltage: 250 m V (typ) @ 500m A (typ. 5V out). Ground Pin Current: 55 µA (typ) at full load. Precision Output Voltage: 2.0% (25˚C) accuracy. Features n n n n n n n n n n 2.0% output accuracy (25˚C) Low dropout voltage: 250 m V @ 500m A (typ, 5V out) Wide input voltage range (2.7V to 10V) Precision (trimmed) bandgap reference Guaranteed specs for -40˚C to +125˚C 1µA off-state quiescent current Thermal overload protection Foldback current limiting T0-252, SOT-223 and 6-Lead LLP packages Enable pin (LP38693) Applications n n n n Hard Disk Drives Notebook puters Battery Powered Devices Portable Instrumentation Typical Application Circuits Note: - Minimum value required for stability. - - LLP package devices only. © 2005 National Semiconductor Corporation DS201265 .national. LP38691/LP38693 Connection Diagrams TO-252, Top View LP38691DT-X.X SOT-223, Top View LP38693MP-X.X 6-Lead LLP, Bottom View LP38691SD-X.X 6-Lead LLP, Bottom View LP38693SD-X.X Pin Description PIN VIN GND SNS DESCRIPTION This is the input supply voltage to the regulator. For LLP devices, both VIN pins must be tied together for full current operation (250m A maximum per pin). Circuit ground for the regulator. This is connected to the die through the lead frame, and also functions as the heat sink when the...