LTC4020
RECOMMENDED FOR NEW DESIGNS55V Buck-Boost Multi-Chemistry Battery Charger
- Part Models
- 4
- 1ku List Price
- Starting From $7.47
Overview
- Wide Voltage Range: 4.5V to 55V Input, Up to 55V Output (60V Absolute Maximums)
- Synchronous Buck-Boost DC/DC Controller
- Li-Ion and Lead-Acid Charge Algorithms
- ±0.5% Float Voltage Accuracy
- ±5% Charge Current Accuracy
- Instant-On for Heavily Discharged Batteries
- Ideal Diode Controller Provides Low Loss PowerPath When Input Power is Limited
- Input Voltage Regulation for High Impedance Input Supplies and Solar Panel Peak Power Operation
- Onboard Timer for Protection and Termination
- Bad Battery Detection with Auto-Reset
- NTC Input for Temperature Qualified Charging
- Binary Coded Open-Collector Status Pins
- Low Profile (0.75mm) 38-Pin 5mm × 7mm QFN Package
The LTC4020 is a high voltage power manager providing PowerPath™ instant-on operation and high efficiency battery charging over a wide voltage range. An onboard buck-boost DC/DC controller operates with battery and/or system voltages above, below, or equal to the input voltage.
The LTC4020 seamlessly manages power distribution between battery and converter outputs in response to load variations, battery charge requirements and input power supply limitations.
The LTC4020 battery charger can provide a constant-current/constant-voltage charge algorithm (CC/CV), constant-current charging (CC), or charging with an optimized 4-step, 3-stage lead-acid battery charge profile. Maximum converter and battery charge currents are resistor programmable.
The IC's instant-on operation ensures system load power even with a fully discharged battery. Additional safety features include preconditioning for heavily discharged batteries and an integrated timer for termination and protection.
APPLICATIONS
- Portable Industrial and Medical Equipment
- Solar-Powered Systems
- Military Communications Equipment
- 12V to 24V Embedded Automotive Systems
Documentation
Data Sheet 1
User Guide 4
Application Note 1
Design Note 1
Technical Articles 3
Video 2
Product Selector Card 1
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 |
|---|---|---|---|
| LTC4020EUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC4020EUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC4020IUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC4020IUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
| Ideal Diodes and PowerPath Controllers 2 | ||
| LTC4417 | RECOMMENDED FOR NEW DESIGNS | Prioritized PowerPath™ Controller |
| LTC2956 | RECOMMENDED FOR NEW DESIGNS | Wake-Up Timer with Pushbutton Control |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4020
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
LTC4020EUHF | High Voltage Buck-Boost Multi-Chemistry Battery Charger
Resources
LTC4020EUHF | High Voltage Buck-Boost Multi-Chemistry Battery Charger
Resources
LTC4020EUHF | High Power Buck-Boost Multi‑Chemistry Battery Charger
Resources
LTC4020EUHF | High Power Buck-Boost Multi‑Chemistry Battery Charger