LT3652

PRODUCTION

Power Tracking 2A Battery Charger for Solar Power

Part Models: 8
1ku List Price: Starting From $3.66

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Part Details

Input Supply Voltage Regulation Loop for Peak Power Tracking in (MPPT) Solar Applications
Wide Input Voltage Range: 4.95V to 32V (40V Abs Max)
Programmable Charge Rate Up to 2A
User Selectable Termination: C/10 or On-Board Termination Timer
Resistor Programmable Float Voltage Up to 14.4V Accommodates Li-Ion/Polymer, LiFePO₄, SLA Chemistries

No V_IN Blocking Diode Required for Battery Voltages ≤ 4.2V
1MHz Fixed Frequency
0.5% Float Voltage Reference Accuracy
5% Charge Current Accuracy
2.5% C/10 Detection Accuracy
Binary-Coded Open-Collector Status Pins
Thermally Enhanced 12-Lead 3mm × 3mm DFN and MSE Packages

The LT3652 is a complete monolithic step-down battery charger that operates over a 4.95V to 32V input voltage range. The LT3652 provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A. The charger employs a 3.3V float voltage feedback reference, so any desired battery float voltage up to 14.4V can be programmed with a resistor divider.

The LT3652 employs an input voltage regulation loop, which reduces charge current if the input voltage falls below a programmed level, set with a resistor divider. When the LT3652 is powered by a solar panel, the input regulation loop is used to maintain the panel at peak output power.

The LT3652 can be configured to terminate charging when charge current falls below 1/10 of the programmed maximum (C/10). Once charging is terminated, the LT3652 enters a low-current (85μA) standby mode. An auto-recharge feature starts a new charging cycle if the battery voltage falls 2.5% below the programmed float voltage. The LT3652 also contains a programmable safety timer, used to terminate charging after a desired time is reached. This allows top-off charging at currents less than C/10.


	V_IN Max	V_FLOAT Max	Features
LT3652	32V	14.4V	Internal Reverse Blocking V_BAT< 4.2V
LT3652HV	34V	18V

APPLICATIONS

Solar Powered Applications
Remote Monitoring Stations
LiFePO₄ (Lithium Phosphate) Applications
Portable Handheld Instruments
12V to 24V Automotive Systems

Part Models: 8
1ku List Price: Starting From $3.66

Documentation

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
LT3652EDD#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3652EDD#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3652EMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3652EMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3652IDD#PBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3652IDD#TRPBF	12-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3652IMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3652IMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only)
		PCN25_0016_Form Material_Report Qualification Results Summary
LT3652EDD#PBF	PRODUCTION
LT3652EDD#TRPBF	PRODUCTION
LT3652EMSE#PBF	PRODUCTION
LT3652EMSE#TRPBF	PRODUCTION
LT3652IDD#PBF	PRODUCTION
LT3652IDD#TRPBF	PRODUCTION
LT3652IMSE#PBF	PRODUCTION
LT3652IMSE#TRPBF	PRODUCTION
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT3652EMSE#PBF	PRODUCTION
LT3652EMSE#TRPBF	PRODUCTION
LT3652IMSE#PBF	PRODUCTION
LT3652IMSE#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0129 Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0129_Form Material_Report
LT3652EMSE#PBF	PRODUCTION
LT3652EMSE#TRPBF	PRODUCTION
LT3652IMSE#PBF	PRODUCTION
LT3652IMSE#TRPBF	PRODUCTION

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

Hardware Ecosystem

Parts	Product Life Cycle	Description
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LTM8062	RECOMMENDED FOR NEW DESIGNS	32V_IN, 2A μModule (Power Module) Power Tracking Battery Charger
Battery Fuel Gauge and Coulomb Counter 1
LTC2943	PRODUCTION	Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement
Digital Temperature Sensors 1
LTC2991	RECOMMENDED FOR NEW DESIGNS	Octal I²C Voltage, Current, and Temperature Monitor
Dual-Supply Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor

PowerPath, Ideal Diodes, and Load Switches 2
LTC4359	RECOMMENDED FOR NEW DESIGNS	Ideal Diode Controller with Reverse Input Protection
LTC4417	RECOMMENDED FOR NEW DESIGNS	Prioritized PowerPath^™ Controller
Pushbutton Controllers 1
LTC2956	RECOMMENDED FOR NEW DESIGNS	Wake-Up Timer with Pushbutton Control

Parts	Product Life Cycle	Description
LT3652HV	RECOMMENDED FOR NEW DESIGNS	Power Tracking 2A Battery Charger

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT3652
LT3652HV

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

LT3652EDD Demo Board | 11.5V to 32VIN, 2A Buck Battery Charger, MPPC for Solar Power Input

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Product Details

Demonstration circuit 1568A is a 2A monolithic multichemistry battery charger for solar power applications featuring the LT3652EDD. The LT3652 is a complete mid-power Li-Ion battery charger that can operate over a wide input voltage range. The charger employs a 3.3V float voltage feedback reference that allows the battery float voltage to be adjusted up to 14.4V.

The LT3652 has an input voltage regulation loop which reduces charge current if the input falls below a programmed level, set with a resistor divider. The circuit provides CC/CV charging with a 2A maximum charge current that is programmed by a sense resistor.

Resources

DC1568A - Design Files
741.00K

DC1568A - Schematic
82.00K

DC1568A - Demo Manual
232.00K

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LT3652

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Application Note 1

Technical Articles 5

Video 1

Solutions Bulletin & Brochure 2

Product Selector Card 4