LTC3625
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LTC3625

1A High Efficiency 2-Cell Supercapacitor Charger with Automatic Cell Balancing

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LTspice LTC3625 - Power Management Download 1.38 KB LTspice LTC3625/LT1784/LT1634 Demo Circuit - Solar Powered SCAP Charger with MPPT Download 4.00KB
Part Models 8
1ku List Price Starting From $3.61
Features
  • High Efficiency Step-Up/Step-Down Charging of Two Series Supercapacitors
  • Automatic Cell Balancing Prevents Capacitor Overvoltage During Charging
  • Programmable Charging Current Up to 500mA (Single Inductor), 1A (Dual Inductor)
  • VIN = 2.7V to 5.5V
  • Selectable 2.4V/2.65V Regulation per Cell (LTC3625)
  • Selectable 2V/2.25V Regulation per Cell (LTC3625-1)
  • Low No-Load Quiescent Current: 23μA
  • IVOUT, IVIN < 1μA in Shutdown
  • Low Profile 12-lead 3mm × 4mm DFN Package
Additional Details
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The LTC3625/LTC3625-1 are programmable supercapacitor chargers designed to charge two supercapacitors in series to a fixed output voltage (4.8V/5.3V or 4V/4.5V selectable) from a 2.7V to 5.5V input supply. Automatic cell balancing prevents overvoltage damage to either supercapacitor while maximizing charge rate. No balancing resistors are required.

High efficiency, high charging current, low quiescent current and low minimum external parts count (one inductor, one bypass capacitor at VIN and one programming resistor) make the LTC3625/LTC3625-1 ideally suited for small form factor backup or high peak power systems.

Charging current/maximum input current level is programmed with an external resistor. When the input supply is removed and/or the EN pin is low, the LTC3625/LTC3625-1 automatically enter a low current state, drawing less than 1μA from the supercapacitors.

The LTC3625/LTC3625-1 are available in a compact 12‑lead 3mm × 4mm × 0.75mm DFN package.

Applications

  • Servers, RAID Systems, Mass Storage, High Current Backup Supplies
  • Solid State Hard Drives
  • Wireless Power Meters
  • High Peak Power Boosted Supplies
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file View Data Sheet
Documentation View All Documentation
LTspice LTC3625 - Power Management Download 1.38 KB LTspice LTC3625/LT1784/LT1634 Demo Circuit - Solar Powered SCAP Charger with MPPT Download 4.00KB
Part Models 8
1ku List Price Starting From $3.61
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LTC3625

Documentation

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Data Sheet

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UPDATED 07/20/2010
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LTC3625: 1A High Efficiency 2-Cell Supercapacitor Charger with Automatic Cell Balancing Data Sheet

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UPDATED 07/20/2010
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LTC3625/LTC3625-1: 1A High Efficiency 2-Cell Supercapacitor Charger with Automatic Cell Balancing Data Sheet

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UPDATED 09/16/2010
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LTC3625: 自動セル・バランシング付きの1A 高効率2セル・スーパーキャパシタ・チャージャ データシート

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User Guide

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UPDATED 11/22/2010
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DC1583A - Demo Manual redirect icon

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Design Note

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UPDATED 01/25/2011
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DN487 - Supercapacitor-Based Power Backup Prevents Data Loss in RAID Systems redirect icon

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UPDATED 05/04/2011
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DN487 - 基于超级电容的后备电源可防止 RAID 系统中的数据丢失 redirect icon

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UPDATED 03/09/2011
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DN487 - RAIDシステムのデータ喪失を防ぐスーパーキャパシタをベースにした電源パックアップ redirect icon

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Reliability Data

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UPDATED 03/26/2018
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R540 Reliability Data redirect icon

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UPDATED 10/01/2010
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Battery-Free Power Backup System Uses Supercapacitors to Prevent Data Loss in RAID Systems redirect icon

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Documentation

Technical Documents 5
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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
LTC3625EDE#PBF 12-Lead DFN (4mm x 3mm w/ EP) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC3625EDE#TRPBF 12-Lead DFN (4mm x 3mm w/ EP) external-link
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LTC3625EDE-1#PBF 12-Lead DFN (4mm x 3mm w/ EP) external-link
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  • Material Declaration external-link
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LTC3625EDE-1#TRPBF 12-Lead DFN (4mm x 3mm w/ EP) external-link
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  • Material Declaration external-link
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LTC3625IDE#PBF 12-Lead DFN (4mm x 3mm w/ EP) external-link
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LTC3625IDE#TRPBF 12-Lead DFN (4mm x 3mm w/ EP) external-link
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LTC3625IDE-1#PBF 12-Lead DFN (4mm x 3mm w/ EP) external-link
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  • Reliablity Data external-link
LTC3625IDE-1#TRPBF 12-Lead DFN (4mm x 3mm w/ EP) external-link
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Software & Part Ecosystem

Parts Product Life Cycle Description

Supercapacitor Chargers1
LTC4425
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RECOMMENDED FOR NEW DESIGNS

Linear SuperCap Charger with Current-Limited Ideal Diode and V/I Monitor

Evaluation Kits 2

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DC1583A-B

LTC3625-1EDE Demo Board | VIN = 2.7V to 5.5V, VOUT = 4.5V or 4.0V @ IOUT up to 1A

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DC1583A-B

LTC3625-1EDE Demo Board | VIN = 2.7V to 5.5V, VOUT = 4.5V or 4.0V @ IOUT up to 1A

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DC1583A-B
LTC3625-1EDE Demo Board | VIN = 2.7V to 5.5V, VOUT = 4.5V or 4.0V @ IOUT up to 1A
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Product Detail

Demonstration circuit 1583A is a 1A high efficiency 2-Cell supercapacitor charger with automatic cell balancing featuring the LTC3625/LTC3625-1. The LTC3625/LTC3625-1 are step-up/step-down programmable supercapacitor chargers designed to charge two supercapacitors in series to a fixed voltage of 5.3V or 4.8V (LTC3625), or 4.5V or 4.0V (LTC3625-1) from a 2.7V to 5.5V input supply. Automatic cell balancing is achieved during the charging phase, preventing overvoltage damage to either supercapacitor while maximizing charge rate.

Resources

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DC1583A - Schematic Download

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DC1583A - Design Files Download

844.00K

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DC1583A - Demo Manual Download

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DC1583A-A

LTC3625EDE Demo Board | VIN = 2.7V to 5.5V, VOUT = 5.3V/4.8V @ IOUT up to 1A

Evaluation Kits2

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DC1583A-B

LTC3625-1EDE Demo Board | VIN = 2.7V to 5.5V, VOUT = 4.5V or 4.0V @ IOUT up to 1A
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DC1583A-A

LTC3625EDE Demo Board | VIN = 2.7V to 5.5V, VOUT = 5.3V/4.8V @ IOUT up to 1A

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

spice tool Lt Spice

LTC3625 - Power Management Download

1.38 K

spice tool Lt Spice

LTC3625/LT1784/LT1634 Demo Circuit - Solar Powered SCAP Charger with MPPT Download

4.00K

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