The LTC1772ES6#TRPBF is a constant frequency current mode step-down DC/DC controller providing excellent AC and DC load and line regulation. The device incorporates an accurate undervoltage lockout feature that shuts down the LTC1772ES6#TRPBF when the input voltage falls below 2.0V.

The LTC1772ES6#TRPBF provides a ±2.5% output voltage accuracy and consumes only 270µA of quiescent current. For applications where efficiency is a prime consideration, the LTC1772ES6#TRPBF is configured for Burst Mode operation, which enhances efficiency at low output current.

To further maximize the life of a battery source, the external P-channel MOSFET is turned on continuously in dropout (100% duty cycle).In shutdown, the device draws a mere 8µA. High constant operating frequency of 550kHz allows the use of a small external inductor.

The LTC1772ES6#TRPBF is available in a small footprint 6-lead SOT-23.

Burst ModeLTC1772YesLTC1772BNo

High Efficiency: Up to 94%

High Output Currents Easily Achieved

Wide VIN Range: 2.5V to 9.8V

Constant Frequency 550kHz Operation

Burst Mode® Operation at Light Load

Low Dropout: 100% Duty Cycle

Tiny 6-Lead SOT-23 Package

0.8V Reference Allows Low Output Voltages

Current Mode Operation for Excellent Line and Load

Transient Response

Low Quiescent Current: 270µA

Shutdown Mode Draws Only 8µA Supply Current

±2.5% Reference Accuracy

One or Two Lithium-Ion-Powered Applications

Cellular Telephones

Wireless Modems

Portable Computers

Distributed 3.3V, 2.5V or 1.8V Power Systems

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