LTM4693

RECOMMENDED FOR NEW DESIGNS

Ultrathin Low V_IN, 2A Buck-Boost μModule Regulator

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $4.15

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Overview

Wide Input Voltage Range: 2.6V to 5.5V
Adjustable Output Voltage Range: 1.8V to 5.5V
2A of Continuous Output Current with V_IN ≥ V_OUT (Buck Mode and Buck-Boost Mode); Minimum 1A Continuous Output Current with V_IN < V_OUT (Boost Mode).

Low Ripple Buck-Boost Architecture
Programmable Soft-Start and V_IN UVLO
Burst Mode I_Q 15μA for High Efficiency at Light Loads
Ultrathin, Small Surface Mount Footprint
3.5mm × 4mm × 1.25mm LGA Package

The LTM4693 is an ultrathin, highly efficient, 2A buck-boost μModule^® DC/DC converter that operates from input voltages above, below or equal to the output voltage. Included in the package are the switching controller, power MOSFETs, inductor and support components. The LTM4693’s advanced topology provides a continuous transfer through all operating modes. V_IN operation from 2.6V to 5.5V covers a wide variety of power sources including typical 3.3V and 5V. Output voltage ranging from 1.8V to 5.5V is set by an external resistor. Only a few external components are needed for a typical application.

Selectable Burst Mode^® operation reduces quiescent current to 15μA, ensuring high efficiency across the entire load range. To optimize applications for highest efficiency, the switching frequency can be programmed between 1MHz to 4MHz or synchronized to an external clock for noise sensitive circuits.

LTM4693 is available in ultrathin, 3.5mm × 4mm ×1.25mm LGA Package. The LTM4693 is Pb-free and RoHS compliant.

APPLICATIONS

Telecom, Datacom (Optical Modules) and Industrial Equipment
Medical and Industrial Instruments
Wireless RF Transmitter
Battery Powered System

Part Models: 2
1ku List Price: Starting From $4.15

Documentation

Informational 1

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTM4693EV#PBF	25-Lead LGA (3.5mm × 4mm × 1.25mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTM4693IV#PBF	25-Lead LGA (3.5mm × 4mm × 1.25mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 16, 2025 - 25_0052 LTM4693 - Die Thickness and Inductor Change
		PCN25_0052_Form Material_Report Qualification Results Summary Qualification Results Summary Other
LTM4693EV#PBF	PRODUCTION
LTM4693IV#PBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice 1

LTM4693 Demo Circuit - 2A Buck-Boost uModule Regulator (2.6-5.5V to 3.3V @2A)

Models for the following parts are available in LTspice:

LTM4693

LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:

LTM4693

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

LTM4693 | 2.6V - 5.5V Input to 1.8V - 5V Output, Ultrathin 2A Buck-Boost μModule Regulator

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Product Details

Demonstration circuit DC3016A is a buck-boost power supply featuring the LTM4693, ultrathin, highly efficient, 2A buck-boost μModule^® regulator. The LTM4693 regulates an output voltage above, below, or equal to the input voltage. This demonstration circuit is designed to have an input voltage from 2.6V to 5.5V with selectable 1.8V, 2.5V, 3.3V, and 5V output voltage up to 2A load. Derating may be necessary for specific V_IN, V_OUT, and thermal conditions.

This demo board includes a mode selector that allows the converter to run in CCM or Burst Mode^® operation. Synchronization to an external clock is also possible. The switching frequency can be adjusted from 1MHz to 4MHz by a resistor. And the soft-start period is programmable by an external capacitor. The LTM4693 data sheet gives a complete description of these functions, operation, and application information. The data sheet must be read in conjunction with this quick start guide for demo circuit 3016A.