Features and Benefits
- 2.7V to 38V VIN Range
- IQ = 18μA Operating; 4μA in Shutdown
- 12V to 5V Efficiency = 81%
- Multimode Operation (2:1, 1:1, 1:2) with Automatic Mode Switching
- Low Noise, Constant Frequency Operation
- Pin Selectable Burst Mode® Operation
- VOUT: Fixed 3.3V, 5V or Adjustable (2.5V to 5V)/li>
- IOUT Up to 250mA
- Overtemperature and Short-Circuit Protection
- Operating Junction Temperature: 150°C Maximum
- Thermally Enhanced 12-Pin MSOP and Low Profile 12-Pin (3mm × 4mm) DFN Packages
The LTC3245 is a switched capacitor buck-boost DC/DC converter that produces a regulated output (3.3V, 5V or adjustable) from a 2.7V to 38V input. The device uses switched capacitor fractional conversion to maintain regulation over a wide range of input voltage. Internal circuitry automatically selects the conversion ratio to optimize efficiency as input voltage and load conditions vary. No inductors are required.
The unique constant frequency architecture provides a lower noise output than conventional charge pump regulators. To optimize efficiency at the expense of slightly higher output ripple, the device has pin selectable Burst Mode operation.
Low operating current (20μA with no load, 4μA in shutdown) and low external parts count (three small ceramic capacitors) make the LTC3245 ideally suited for low power, space constrained automotive/industrial applications. The device is short-circuit and overtemperature protected, and is available in thermally enhanced 12-pin MSOP and low profile 3mm × 4mm 12-pin DFN packages.
- Automotive ECU/CAN Transceiver Supplies
- Industrial Housekeeping Supplies
- Low Power 12V to 5V Conversion
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 DC1802A is a wide VIN range, low noise, 250mA buck-boost charge pump featuring the LTC3245EMSE. It has an input supply range of 2.7V to 38V and provides a jumper-selectable 5V, 3.3V, or adjustable output (set to 1.2V) at 250mA.
Tools & Simulations
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.
Models for the following parts are available in LTspice:
LTC3245 Companion Parts
Recommended Related Parts
Product Selector Card (1)
Solutions Bulletins & Brochures (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.
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.