LT3652 - Power Tracking 2A Battery Charger for Solar Power


  • 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 VIN 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
  • 3mm × 3mm DFN12 or MSOP-12 Packages

Typical Application

LT3652 Typical Application
LT3652 Typical Application


The LT®3652 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.

 Vin MaxVfloat MaxFeatures
LT3652 32V 14.4V internal reverse blocking
LT3652HV 34V 18V  


For complete and up to date package information and drawings, please refer to our packaging page

DFN-12, MS-12

LT3652 Package Drawing
LT3652 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3652EDD#PBF DFN 12 E $4.36 $3.05 View
LT3652EDD#TRPBF DFN 12 E $3.11 View
LT3652EMSE#PBF MSOP 12 E $4.36 $3.05 View
LT3652EMSE#TRPBF MSOP 12 E $3.11 View
LT3652IDD#PBF DFN 12 I $4.80 $3.36 View
LT3652IDD#TRPBF DFN 12 I $3.42 View
LT3652IMSE#PBF MSOP 12 I $4.80 $3.36 View
LT3652IMSE#TRPBF MSOP 12 I $3.42 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1568A LT3652EDD Demo Board | 11.5V to 32VIN, 2A Buck Battery Charger, MPPC for Solar Power Input $150.00
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Click here to view our complete list of demo boards


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

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