LTC3455/LTC3455-1
NOT RECOMMENDED FOR NEW DESIGNSDual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
- Part Models
- 4
- 1ku List Price
- Starting From $5.19
Overview
- Seamless Transition between Input Power Sources:
- Li-Ion Battery,
- USB, and
- 5V Wall Adapter
- Accurate USB Current Limiting (500mA/100mA)
- Two High Efficiency DC/DC Converters: Up to 96%
- Thermal Regulation Maximizes Battery Charge Rate without Risk of Overheating
- Full-Featured Li-Ion Battery Charger with 4.2V Float Voltage for LTC3455 and 4.1V for LTC3455-1
- 4.1V Float Voltage (LTC3455-1) Improves Battery Life and High Temperature Safety Margin
- Hot Swap™ Output for SDIO and Memory Cards
- Pin-Selectable Burst Mode® Operation
- Output Disconnect: All Outputs Discharged to Ground During Shutdown
- Available in a 4mm × 4mm × 0.75mm 24-Pin QFN Package
The LTC3455/LTC3455-1 are complete power management solutions for a variety of portable applications. These devices contain two synchronous step-down DC/DC converters, a USB power controller, a full-featured Li-Ion battery charger, a Hot Swap output, a low-battery indicator, and numerous internal protection features. The LTC3455/LTC3455-1 provide a small, simple solution for obtaining power from three different power sources: a single-cell Li-Ion battery, a USB port, and a wall adapter. Current drawn from the USB bus is accurately limited under all conditions. Whenever a USB or a wall adapter is present, the battery charger is enabled and all internal power for the device is drawn from the appropriate external power source. All outputs are discharged to ground during shutdown to provide complete output disconnect. These devices are available in a 4mm × 4mm 24-pin exposed-pad QFN package.
Applications
- Handheld Computers
- Digital Cameras
- MP3 Players
Documentation
Data Sheet 1
User Guide 2
Design Note 2
Technical Articles 2
Press Release 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 |
|---|---|---|---|
| LTC3455EUF#PBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3455EUF#TRPBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3455EUF-1#PBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3455EUF-1#TRPBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 25, 2023 - 23_0106 Obsolete parts: LTC3455EUF-1#PBF, LTC3455EUF-1#TRPBF, LTC3455EUF#PBF, LTC3455EUF#TRPBF |
||
| LTC3455EUF#PBF | Obsolete | |
| LTC3455EUF#TRPBF | Obsolete | |
| LTC3455EUF-1#PBF | Obsolete | |
| LTC3455EUF-1#TRPBF | Obsolete | |
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 |
|---|---|---|
| Battery Monitors & Fuel Gauges 1 | ||
| LTC2942 | Obsolete | Battery Gas Gauge with Temperature, Voltage Measurement |
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Hot Swap Controllers 1 | ||
| LTC4261 | PRODUCTION | Negative Voltage Hot Swap Controllers with ADC and I²C Monitoring |
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC2955 | RECOMMENDED FOR NEW DESIGNS | Pushbutton On/Off Controller with Automatic Turn-On |
Evaluation Kits
LTC3455EUF-1 Demo Board | USB Power Solution, USB/5V Adapter Input, Linear Li-Ion Charger, Dual Synchronous Buck 3.15V at 500mA, 1.8V at 400mA
Resources
LTC3455EUF Demo Board | USB Power Solution, USB/5V Adapter Input, Linear Li-Ion Charger, Dual Synchronous Buck 3.15V @ 500mA, 1.8V @ 400mA