LTC1772

PRODUCTION

Constant Frequency Current Mode Step-Down DC/DC Controller in SOT-23

Analog Devices LTC1772 Product Info

10 February 2026 6

Features

High Efficiency: Up to 94%
High Output Currents Easily Achieved
Wide V_IN 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

Part details & applications

The LTC1772 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 LTC1772 when the input voltage falls below 2.0V.

The LTC1772 provides a ±2.5% output voltage accuracy and consumes only 270µA of quiescent current. For applications where efficiency is a prime consideration, the LTC1772 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 LTC1772 is available in a small footprint 6-lead SOT-23.


	Burst Mode
LTC1772	Yes
LTC1772B	No

Applications

One or Two Lithium-Ion-Powered Applications
Cellular Telephones
Wireless Modems
Portable Computers
Dist

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