LTC4070
PRODUCTIONLi-Ion/Polymer Shunt Battery Charger System
- Part Models
- 8
- 1ku List Price
- Starting From $3.46
Overview
- Low Operating Current (450nA)
- 1% Float Voltage Accuracy Over Full Temperature and Shunt Current Range
- 50mA Maximum Internal Shunt Current (500mA with External PFET)
- Pin Selectable Float Voltage Options: 4.0V, 4.1V, 4.2V
- Ultralow Power Pulsed NTC Float Conditioning for Li-Ion/Polymer Protection
- Suitable for Intermittent, Continuous and Very Low Power Charging Sources
- Low and High Battery Status Outputs
- Simple Low Voltage Load Disconnect Application
- Thermally Enhanced, Low Profile (0.75mm) 8-Lead (2mm × 3mm) DFN and MSOP Packages
The LTC4070 allows simple charging of Li-Ion/Polymer batteries from very low current, intermittent or continuous charging sources. The 450nA to 50mA operating current makes charging possible from previously unusable sources. With the addition of an external pass device, shunt current may be boosted to 500mA. Stacked cell high voltage battery packs are inherently balanced with shunt charging. With its low operating current, the LTC4070 is well suited to charge thin film batteries in energy harvesting applications where charging sources may be intermittent or very low power. The unique architecture of the LTC4070 allows for an extremely simple battery charger solution; requiring just one external resistor.
The LTC4070 offers a pin selectable float voltage with 1% accuracy across the full range of operating temperature and shunt current. The integrated thermal battery qualifier extends battery lifetime and improves reliability by automatically reducing the battery float voltage at NTC thermistor temperatures above 40°C. The LTC4070 also provides both low and high battery status outputs. For applications requiring pack protection, see LTC4071.
The device is offered in two thermally enhanced packages, a compact low profile (0.75mm) 8-lead (2mm × 3mm) DFN and an 8-lead MSOP package.
Applications
- Low Power Li-Ion/Polymer Battery Back-Up
- Solar Power Systems with Back-Up
- Memory Back-Up
- Embedded Automotive
- Thin Film Batteries
- Energy Scavenging/Harvesting
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Technical Articles 1
Video 2
Product Selector Card 3
Brochure 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 |
|---|---|---|---|
| LTC4070EDDB#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC4070EDDB#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC4070EMS8E#PBF | 8-Lead MSOP w/ EP | ||
| LTC4070EMS8E#TRPBF | 8-Lead MSOP w/ EP | ||
| LTC4070IDDB#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC4070IDDB#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC4070IMS8E#PBF | 8-Lead MSOP w/ EP | ||
| LTC4070IMS8E#TRPBF | 8-Lead MSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LTC4070EMS8E#PBF | PRODUCTION | |
| LTC4070EMS8E#TRPBF | PRODUCTION | |
| LTC4070IMS8E#PBF | PRODUCTION | |
| LTC4070IMS8E#TRPBF | PRODUCTION | |
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC4070EMS8E#PBF | PRODUCTION | |
| LTC4070EMS8E#TRPBF | PRODUCTION | |
| LTC4070IMS8E#PBF | PRODUCTION | |
| LTC4070IMS8E#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4070
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
LTC4070EDDB Demo Board | Simple Low-IQ Battery Charger/Protector with NTC Thermistor Input
Resources
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