LP38690

LP38690/LP38692 1A Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors January 2005 LP38690/LP38692 1A Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors General Description The LP38690/2 low dropout CMOS linear regulators provide tight output tolerance (2.5% typical), extremely low dropout voltage (450mV @ 1A 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: 450 mV (typ) @ 1A (typ. 5V out). Ground Pin Current: 55 µA (typ) at full load. Precision Output Voltage: 2.5% (25˚C) accuracy. Features n n n n n n n n n n 2.5% output accuracy (25˚C) Low dropout voltage: 450mV @ 1A (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 (LP38692) Applications n n n n Hard Disk Drives Notebook Computers Battery Powered Devices Portable Instrumentation Typical Application Circuits 20126601 20126602...