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LTC3025-4

Linear Technology
Part Number LTC3025-4
Manufacturer Linear Technology
Description 500mA Micropower VLDO Linear Regulators
Published Apr 2, 2010
Detailed Description Features n Wide Input Voltage Range: 0.9V to 5.5V n Stable with Ceramic Capacitors n Very Low Dropout: 85mV at 500mA n A...
Datasheet PDF File LTC3025-4 PDF File

LTC3025-4
LTC3025-4


Overview
Features n Wide Input Voltage Range: 0.
9V to 5.
5V n Stable with Ceramic Capacitors n Very Low Dropout: 85mV at 500mA 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 100kHz) 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 500mA 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 500mA of output current with a typical dropout voltage of only 85mV.
A BIAS supply is required to run the internal reference and LDO circuitry while output current comes 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 NiMH and single cell Li-Ion applications, the BIAS voltage can be supplied directly from the battery while the input can come 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 1...


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