LTC3530 - Wide Input Voltage Synchronous Buck-Boost DC/DC Converter
Features
- Regulated Output with Input Voltages Above, Below or Equal to the Output
- 1.8V to 5.5V Input and 1.8V to 5.25V Output Range
- 250mA Continuous Output Current from 1.8V VIN
- 600mA Continuous/1A Peak Output Current from Li-Ion
- Single Inductor
- Synchronous Rectification: Up to 96% Effi ciency
- Programmable Automatic Burst Mode® Operation
- Output Disconnect in Shutdown
- Pin Compatible with the LTC3440
- Programmable Frequency from 300kHz to 2MHz
- <1µA Shutdown Current
- Small Thermally Enhanced 10-Lead (3mm × 3mm) DFN and 10-Lead MS Packages
Typical Application
Description
The LTC3530 is a wide VIN range, highly efficient, 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, two-cell alkaline or NiMH applications where the output voltage is within the battery voltage range.The LTC3530 is pin compatible with the LTC3440 buckboost DC/DC converter but adds programmable automatic Burst Mode operation and extends the VIN/VOUT range to 1.8V. Switching frequencies up to 2MHz are programmed with an external resistor. Automatic Burst Mode operation allows the user to program the load current threshold for Burst Mode operation using a single resistor from the BURST pin to GND.
Other features include 1µA shutdown, short circuit protection, programmable soft-start control, current limit and thermal shutdown. The LTC3530 is available in a thermally enhanced 10-lead (3mm × 3mm) DFN or MSOP package.
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 |
|---|---|---|---|---|---|
| LTC3530EDD#PBF | 3x3 DFN-10 | DD | E | 05-08-1699 | Yes |
| LTC3530EDD#TRPBF | 3x3 DFN-10 | DD | E | 05-08-1699 | Yes |
| LTC3530EMS#PBF | MS-10 | MS | E | 05-08-1661 | Yes |
| LTC3530EMS#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 | |
|---|---|---|---|---|---|---|
| LTC3530EDD#PBF | 3x3 DFN-10 | E | $4.24 | $2.75 | Yes | |
| LTC3530EDD#TRPBF | 3x3 DFN-10 | E | $2.80 | Yes | ||
| LTC3530EMS#PBF | MS-10 | E | $4.24 | $2.75 | Yes | |
| LTC3530EMS#TRPBF | MS-10 | E | $2.80 | 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 |
|---|---|---|---|
| DC938A | LTC3530EDD | Low Vin, 600mA Buck-Boost Converter | $125.00 | |
| Buy Now | |||
Applications
- MP3 Players
- Handheld Instruments
- Digital Cameras
- Smart Phones
- Portable GPS Units
- Miniature Hard Disk Drive Power
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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:
LTC3530
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.
