LTC4088-1/-2 - High Efficiency Battery Charger/USB Power Manager with Regulated Output Voltage
Features
- Switching Regulator Makes Optimal Use of Limited Power Available from USB Port to Charge Battery and Power Application
- 180mΩ Internal Ideal Diode Plus External Ideal Diode Controller Seamlessly Provide Low Loss Power Path When Input Power is Limited or Unavailable
- Automatic Charge Current Reduction Maintains 3.6V Minimum VOUT
- Full Featured Li-Ion/Polymer Battery Charger
- VBUS Operating Range: 4.25V to 5.5V (7V Absolute Maximum—Transient)
- 1.2A Maximum Input Current Limit
- 1.5A Maximum Charge Current with Thermal Limiting
- Bat-Track Adaptive Output Control
- Slew Control Reduces Switching EMI
- Low Profile (0.75mm) 14-Lead 4mm × 3mm DFN Package
Typical Application
Description
The LTC4088-1/LTC4088-2 is a high efficiency USB PowerPath TM controller and Li-Ion/Polymer battery charger. It includes a synchronous switching input regulator, a full-featured battery charger and an ideal diode. Designed specifically for USB applications, the LTC4088-1/LTC4088-2's switching regulator automatically limits its input current to either 100mA, 500mA or 1A via logic control. The LTC4088-1 powers-up with the charger off; the LTC4088-2 powers-up with the charger on.
The switching input stage provides power to VOUT where power sharing between the application circuit and the battery charger is managed. Charge current is automatically reduced to maintain a regulated 3.6V VOUT during low-battery conditions. As the battery is charged, VOUT tracks VBAT for high efficiency charging. This feature allows the LTC4088-1/LTC4088-2 to provide more power to the application and eases thermal issues in constrained applications.
An ideal diode ensures that system power is available from the battery when the input current limit is reached or if the USB or wall supply is removed. The LTC4088-1/LTC4088-2 is available in the low profile 14-Lead 4mm x 3mm x 0.75mm DFN surface mount package.
| Input Logic Truth Table | Automatic Charge Current Reduction | 3.3V LDO | |
|---|---|---|---|
| LTC4088 | Battery charger enabled with all logic inputs grounded | No | Yes |
| LTC4088-1 | Battery charger enabled with all logic inputs grounded | Yes | No |
| LTC4088-2 | Battery charger enabled with all logic inputs grounded | Yes | No |
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC4088EDE-1#PBF | 4x3 DFN-14 | DE | E | 05-08-1708 | Yes |
| LTC4088EDE-1#TRPBF | 4x3 DFN-14 | DE | E | 05-08-1708 | Yes |
| LTC4088EDE-2#PBF | 4x3 DFN-14 | DE | E | 05-08-1708 | Yes |
| LTC4088EDE-2#TRPBF | 4x3 DFN-14 | DE | E | 05-08-1708 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC4088EDE-1#PBF | 4x3 DFN-14 | E | $3.14 | $2.20 | Yes | |
| LTC4088EDE-1#TRPBF | 4x3 DFN-14 | E | $2.26 | Yes | ||
| LTC4088EDE-2#PBF | 4x3 DFN-14 | E | $3.14 | $2.20 | Yes | |
| LTC4088EDE-2#TRPBF | 4x3 DFN-14 | E | $2.26 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1189A | LTC4088EDE-1 Demo Board| High Efficiency Battery Charger/Power manager | $150.00 | |
| DC1377A | LTC4088EDE-2 | High Efficiency Battery Charger/Power Manager | Contact Factory | |
| Buy Now | |||
Applications
- Media Players
- Digital Cameras
- GPS
- PDAs
- Smart Phones
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
