Features and Benefits
- Single Inductor
- Regulated Output with Input Voltages Above, Below or Equal to the Output
- Wide VIN Range: 2.4V to 5.5V
- VOUT Range: 2.4V to 5.25V
- Up to 500mA Peak Output Current
- Synchronous Rectification: Up to 95% Efficiency
- Manual or Programmable Automatic Burst Mode® Operation
- Output Disconnect in Shutdown
- Programmable Oscillator: 300kHz to 2MHz
- Pin Compatible with LTC3440
- Small Thermally Enhanced 10-Lead (3mm × 3mm)
- DFN and 10-Lead MSOP Packages
The LTC3532 is a high efficiency, fixed frequency, buck-boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single lithium-ion, multicell alkaline or NiMH applications where the output voltage is within the battery voltage range.
The device includes two 0.36Ω N-channel MOSFET switches and two 0.42Ω P-channel switches. Switching frequencies up to 2MHz are programmed with an external resistor. Quiescent current is only 35μA in Burst Mode operation, maximizing battery life in portable applications. Automatic Burst Mode operation allows the user to program the load current for Burst Mode operation or to control it manually.
Other features include a 1μA shutdown, soft-start control, thermal shutdown, and peak current limit. The LTC3532 is available in a low profile (0.75mm) 10-lead (3mm × 3mm) DFN and 10-lead MSOP packages.
- Miniature Hard Disk Drive Power Supply
- MP3 Players
- Handheld Instruments
- Digital Cameras
- Handheld Terminals
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 921 is a micropower synchronous buck-boost converter based on the LTC3532 monolithic buck-boost regulator. The DC921 has an input voltage range of 2.4 V to 5.5V and an output of 3.3V @ 300mA.
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:
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.