LTC3532 - Micropower Synchronous Buck-Boost DC/DC Converter
Features
- 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
Typical Application
Description
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.
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 |
|---|---|---|---|---|---|
| LTC3532EDD#PBF | 3x3 DFN-10 | DD | E | 05-08-1699 | Yes |
| LTC3532EDD#TRPBF | 3x3 DFN-10 | DD | E | 05-08-1699 | Yes |
| LTC3532EMS#PBF | MS-10 | MS | E | 05-08-1661 | Yes |
| LTC3532EMS#TRPBF | MS-10 | MS | E | 05-08-1661 | 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 | |
|---|---|---|---|---|---|---|
| LTC3532EDD#PBF | 3x3 DFN-10 | E | $3.36 | $2.35 | Yes | |
| LTC3532EDD#TRPBF | 3x3 DFN-10 | E | $2.41 | Yes | ||
| LTC3532EMS#PBF | MS-10 | E | $3.36 | $2.35 | Yes | |
| LTC3532EMS#TRPBF | MS-10 | E | $2.41 | 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 |
|---|---|---|---|
| DC921A | LTC3532EDD Demo Board | Buck-Boost, 2.4V ≤ VIN ≤ 5.5V, Vout = 3.3V @ 300mA | $125.00 | |
| Buy Now | |||
Applications
- Miniature Hard Disk Drive Power Supply
- MP3 Players
- Handheld Instruments
- Digital Cameras
- Handheld Terminals
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LTC3532
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.
