LTC4000 - High Voltage High Current Controller for Battery Charging and Power Management


  • Complete High Performance Battery Charger When Paired with a DC/DC Converter
  • Wide Input and Output Voltage Range: 3V to 60V
  • Input Ideal Diode for Low Loss Reverse Blocking and Load Sharing
  • Output Ideal Diode for Low Loss PowerPath™ and Load Sharing with the Battery
  • Instant-On Operation with Heavily Discharged Battery
  • Programmable Input and Charge Current: ±1% Accuracy
  • ±0.25% Accurate Programmable Float Voltage
  • Programmable C/X or Timer Based Charge Termination
  • NTC Input for Temperature Qualified Charging
  • 28-Lead 4mm × 5mm QFN or SSOP Packages

Typical Application

LTC4000 Typical Application
LTC4000 Typical Application


The LTC®4000 is a high voltage, high performance controller that converts many externally compensated DC/DC power supplies into full-featured battery chargers.

Features of the LTC4000’s battery charger include: accurate (±0.25%) programmable float voltage, selectable timer or current termination, temperature qualified charging using an NTC thermistor, automatic recharge, C/10 trickle charge for deeply discharged cells, bad battery detection and status indicator outputs. The battery charger also includes precision current sensing that allows lower sense voltages for high current applications.

The LTC4000 supports intelligent PowerPath control. An external PFET provides low loss reverse current protection. Another external PFET provides low loss charging or discharging of the battery. This second PFET also facilitates an instant-on feature that provides immediate downstream system power even when connected to a heavily discharged or short faulted battery.

The LTC4000 is available in a low profile 28-lead 4mm × 5mm QFN and SSOP packages.

Input Voltage Regulation MPPC No Yes
Input Current Monitoring  Yes Yes
Input Current Regulation Yes No


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

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

Part Number Package Code Temp Package
LTC4000EGN#PBF SSOP-28 GN E 05-08-1641 (GN28) Yes
LTC4000EGN#TRPBF SSOP-28 GN E 05-08-1641 (GN28) Yes
LTC4000EUFD#PBF 4x5 QFN-28 UFD E 05-08-1712 Yes
LTC4000EUFD#TRPBF 4x5 QFN-28 UFD E 05-08-1712 Yes
LTC4000IGN#PBF SSOP-28 GN I 05-08-1641 (GN28) Yes
LTC4000IGN#TRPBF SSOP-28 GN I 05-08-1641 (GN28) Yes
LTC4000IUFD#PBF 4x5 QFN-28 UFD I 05-08-1712 Yes
LTC4000IUFD#TRPBF 4x5 QFN-28 UFD I 05-08-1712 Yes

LTC4000 Package Drawing
LTC4000 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC4000EGN#PBF SSOP-28 E $5.90 $4.13 Yes
LTC4000EGN#TRPBF SSOP-28 E $4.19 Yes
LTC4000EUFD#PBF 4x5 QFN-28 E $5.64 $3.95 Yes
LTC4000EUFD#TRPBF 4x5 QFN-28 E $4.01 Yes
LTC4000IGN#PBF SSOP-28 I $6.43 $4.50 Yes
LTC4000IGN#TRPBF SSOP-28 I $4.56 Yes
LTC4000IUFD#PBF 4x5 QFN-28 I $6.23 $4.36 Yes
LTC4000IUFD#TRPBF 4x5 QFN-28 I $4.42 Yes
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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
DC1721A LTC4000EGN/LTC3789EGN Demo Board u 14.6V, 5A Battery Charger with 6VIN to 36VIN Buck-Boost Converter $250.00
DC1830B-A LTC4000EGN Battery Charger Controller and PowerPath Manager $250.00
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Click here to view our complete list of demo boards


  • High Power Battery Charger Systems
  • High Performance Portable Instruments
  • Industrial Battery Equipped Devices
  • Notebook/Subnotebook Computers

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