LT3653
PRODUCTION1.2A, HV Input Regulator with Output Current Limit for Battery Charger Applications
- Part Models
- 4
- 1ku List Price
- Starting From $3.81
Overview
- Wide Input Range:
- Operation from 7.5V to 30V
- Overvoltage Lockout Protects Circuit Through 60V Transients
- Operates with LTC Bat-Track™ Li-Ion Battery Chargers to Maximize Efficiency
- No Reverse Discharge Path from VOUT to VIN
- Programmable Output Current Limit
- Integrated BOOST Diode
- Thermal Protection
- Small Application Size
- Thermally Enhanced 2mm × 3mm DFN Package
The LT3653 is a monolithic current mode PWM step-down regulator with programmable output current limit. Typically, it is used with battery charger power path controllers to pre-regulate the output and optimize the battery charger efficiency. Output current limit provides accurate control over system power dissipation.
The wide operating input voltage range of 7.5V to 30V suits the LT3653 to a variety of input sources, including unregulated 12V wall adapters, 24V industrial supplies, Firewire and automotive power. Input overvoltage protection allows the LT3653 to handle 60V input transients.
The LT3653 control pin, VC, is available for external battery tracking control, Bat-Track. The LT3653 will block output discharge during an open or shorted input.
The HVOK pin indicates that the internal bias supplies are present and no faults have occurred (i.e., overtemperature and input overvoltage and undervoltage). The LT3653 includes a 1.5MHz frequency oscillator, internal compensation, and an internal boost diode to minimize the number of external components. The LT3653 is available in an 8-lead (2mm × 3mm) package with exposed pads for low thermal resistance.
Applications
- Battery Powered Equipment
- Portable USB Devices – Cameras, MP3 Players, PDAs
- Automotive Battery Regulation
- Multiple-Source Battery Chargers
Documentation
Data Sheet 1
User Guide 1
Technical Articles 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 |
|---|---|---|---|
| LT3653EDCB#TRMPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LT3653EDCB#TRPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LT3653IDCB#TRMPBF | 8-Lead DFN (2mm x 3mm w/ EP) | ||
| LT3653IDCB#TRPBF | 8-Lead DFN (2mm x 3mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Hot Swap Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
| Switching Regulators & Controllers 1 | ||
| LTC3880 | RECOMMENDED FOR NEW DESIGNS | Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management |
Evaluation Kits
LT3653EDCB Demo Board | 1.2A, HV Input Pre-Regulator with Output Current Limit for Battery Charger Application
Resources
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