Features and Benefits
- Switching Regulator Makes Optimal Use of Limited Power Available from USB Port to Charge Battery and Power Application
- 180mΩ Internal Ideal Diode Plus Optional External Ideal Diode Controller Seamlessly Provides Low Loss Power Path When Input Power is Limited or Unavailable
- 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
The LTC4088 is a high efﬁciency USB PowerPath™ 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’s switching regulator automatically limits its input current to either 100mA, 500mA or 1A for wall-powered applications via logic control.
The switching input stage provides power to VOUT where power sharing between the application circuit and the battery charger is managed. Unlike linear PowerPath controllers, the LTC4088’s switching input stage can use nearly all of the 0.5W or 2.5W available from the USB port with minimal power dissipation. This feature allows the LTC4088 to provide more power to the application and eases thermal issues in space-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 is available in the low profile 14-Lead 4mm × 3mm × 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|
- Media Players
- Digital Cameras
- Smart Phones
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration Circuit 1007 is a high efficiency USB power manager with PowerPathTM control and Li-Ion/Polymer battery charger featuring the LTC4088. It includes a synchronous buck switching regulator, a full featured battery charger and an ideal diode. Designed specifically for USB applications, the LTC4088’s switching regulator automatically limits its input current to either 100mA, 500mA or 1A for wall-powered applications via logic control. There are also 2.5mA and 500uA suspend modes to prevent the battery from running down when the product is connected to a suspended USB bus. The demo board targets 4.2V li-ion batteries. It has a 4.35V to 5.5V input voltage range and generates a 3.5V to 4.7V system output voltage from which a CC/CV linear charger provides the 500mA charge current. Though limited by the demo board, the LTC4088's maximum charge current is 1.5A from a 5V power source such as a wall cube.
Product Selector Card (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.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.