LTC3025-4 Datasheet | Linear Technology

Features n Wide Input Voltage Range: 0.9V to 5.5V n Stable with Ceramic Capacitors n Very Low Dropout: 85m V at 500m A n Adjustable Output Range: 0.4V to 3.6V (LTC3025-1) n Fixed Output: 1.2V (LTC3025-2), 1.5V (LTC3025-3), 1.8V (LTC3025-4) n ±2% Voltage Accuracy over Temperature, Supply and Load n Low Noise: 80µVRMS (10Hz to 100k Hz) n BIAS Voltage Range: 2.5V to 5.5V n Fast Transient Recovery n Shutdown Disconnects Load from VIN and VBIAS n Low Operating Current: IIN = 4µA, IBIAS = 50µA Typ n Low Shutdown Current: IIN = 1µA, IBIAS = 0.01µA Typ n Output Current Limit n Thermal Overload Protection n Available in 6-Lead (2mm × 2mm) DFN Package Applications n Low Power Handheld Devices n Low Voltage Logic Supplies n DSP Power Supplies n Cellular Phones n Portable Electronic Equipment n Handheld Medical Instruments n Post Regulator for Switching Supply Noise Rejection LTC3025-1/LTC3025-2/ LTC3025-3/LTC3025-4 500m A Micropower VLDO Linear Regulators Description The LTC®3025-X is a micropower, VLDO™ (very low dropout) linear regulator which operates from input voltages as low as 0.9V. The device is capable of supplying 500m A of output current with a typical dropout voltage of only 85m V. A BIAS supply is required to run the internal reference and LDO circuitry while output current es directly from the IN supply for high efficiency regulation. The LTC3025-1 Features an adjustable output with a low 0.4V reference while the LTC3025-2, LTC3025-3, and LTC3025-4 have fixed 1.2V, 1.5V and 1.8V output voltages respectively. The LTC3025-X’s low quiescent current makes it an ideal choice for use in battery-powered systems. For 3-cell Ni MH and single cell Li-Ion applications, the BIAS voltage can be supplied directly from the battery while the input can e from a high efficiency buck regulator, providing a high efficiency, low noise output. Other Features include high output voltage accuracy, excellent transient response, stability with ultralow ESR ceramic capacitors as small as...