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LTC3250-1.5

Linear
Part Number LTC3250-1.5
Manufacturer Linear
Description Inductorless Step-Down DC/DC Converter
Published Apr 3, 2016
Detailed Description LTC3250-1.5/LTC3250-1.2 High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter U U FEATURES s 2.7V to 5.5V...
Datasheet PDF File LTC3250-1.5 PDF File

LTC3250-1.5
LTC3250-1.5

Overview
LTC3250-1.
5/LTC3250-1.
2 High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter U U FEATURES s 2.
7V to 5.
5V Input Voltage Range s No Inductors s Li-Ion (3.
6V) to 1.
5V with 81% Efficiency s Low Noise Constant Frequency Operation s Output Voltages: 1.
5V ±4%, 1.
2V ±4% s Output Current: 250mA s Shutdown Disconnects Load from VIN s Low Operating Current: IQ = 35µA s Low Shutdown Current: ISD < 1µA s Oscillator Frequency = 1.
5MHz s Soft-Start Limits Inrush Current at Turn-On s Short-Circuit and Overtemperature Protected s Low Profile (1mm) SOT-23 Package U APPLICATIO S s Handheld Computers s Cellular Phones s Digital Cameras s Handheld Medical Instruments s Low Power DSP Supplies DESCRIPTIO The LTC®3250-1.
5/LTC3250-1.
2 are charge pump stepdown DC/DC converters that produce a 1.
5V or 1.
2V regulated output from a 2.
7V to 5.
5V input.
The parts use switched capacitor fractional conversion to achieve typical efficiency two times higher than that of a linear regulator.
No inductors are required.
A unique constant frequency architecture provides a low noise regulated output as well as lower input noise than conventional charge pump regulators.
* High frequency operation (fOSC = 1.
5MHz) simplifies filtering to further reduce conducted noise.
The part also uses Burst Mode® operation to improve efficiency at light loads.
Low operating current (35µA with no load, <1µA in shutdown) and low external parts count (three small ceramic capacitors) make the LTC3250-1.
5/LTC3250-1.
2 ideally suited for space constrained battery powered applications.
The parts are short-circuit and overtemperature protected, and are available in a low profile (1mm) 6-pin ThinSOTTM package.
, LTC and LT are registered trademarks of Linear Technology Corporation Burst Mode is a registered trademark of Linear Technology Corporation ThinSOT is a trademark of Linear Technology Corporation.
*U.
S.
Patent #6, 411, 531 TYPICAL APPLICATIO Li-Ion to 1.
5V Output with Shutdown 1µF VIN 3.
2V TO 4.
2V Li-Ion 1...


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