LTC3822-1

PRODUCTION

No RSENSE™, Low Input Voltage, Synchronous Step-Down DC/DC Controller

Analog Devices LTC3822-1 Product Info

10 February 2026 4

Features

Dual N-Channel MOSFET Synchronous Drive
No Current Sense Resistor Required
Optimized for 3.3V_IN and Li-Ion Applications
Constant Frequency Current Mode Operation for Excellent Line and Load Transient Response
±1% 0.6V Reference
Low Dropout Operation: 99% Duty Cycle
Phase-Lockable or Adjustable Frequency: 250kHz to 750kHz
Internal Soft-Start Circuitry
Tracking and Adjustable Soft-Start Input

Selectable Maximum Peak Current Sense Threshold
Selectable Burst Mode^®/Forced Continuous/Pulse Skipping Mode at Light Load
Digital RUN Control Pin
Output Overvoltage Protection
Micropower Shutdown: I_Q = 7.5µA
Tiny Thermally Enhanced 12-Pin (3mm × 3mm) DFN or 16-Pin Narrow SSOP Packages

Part details & applications

The LTC3822-1 is a synchronous step-down switching regulator controller that drives external N-channel power MOSFETs using few external components. The constant frequency current mode architecture with MOSFET V_DS sensing eliminates the need for sense resistors and improves efficiency.

Burst Mode operation provides high efficiency at light loads. The 99% maximum duty cycle provides low dropout operation, extending operating time in battery-powered systems.

The operating frequency can be programmed up to 750kHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications, the LTC3822-1 can be synchronized to an external clock from 250kHz to 750kHz.

The LTC3822-1 is available in the tiny footprint thermally enhanced 12-pin DFN package or 16-pin narrow SSOP package.

	Features
LTC3822	Internal soft-start, 34µA in sleep mode
LTC3822-1	External soft start, selectable pulse skip/Burst Mode operation, power good (SSOP-16 package only), 105µA in sleep mode

Applications

Single Cell Li-Ion Powered Systems
3.3V_IN Systems

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