LTC3534 - 7V, 500mA Synchronous Buck-Boost DC/DC Converter
Features
- Regulated Output with Input Voltages Above, Below or Equal to the Output
- 2.4V to 7V VIN and 1.8V to 7V VOUT Ranges
- 5V VOUT at 500mA from 4 AA Cells
- Single Inductor
- Synchronous Rectification: Up to 94% Efficiency
- Burst Mode® Operation with 25μA IQ
- Output Disconnect in Shutdown
- 1MHz Switching Frequency
- <1μA Shutdown Current
- Small Thermally Enhanced 16-Lead (5mm × 3mm × 0.75mm) DFN and 16-Lead GN Packages
Typical Application
Description
The LTC®3534 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 multi-cell Alkaline/NiMH or single Lithium-Ion/Polymer applications where the output voltage is within the battery voltage range.
The LTC3534 offers extended VIN and VOUT ranges of 2.4V to 7V and 1.8V to 7V, respectively. Quiescent current is only 25μA in Burst Mode operation, maximizing battery life in portable applications. Burst Mode operation is user controlled and can be enabled by driving the PWM pin low. If the PWM pin is driven high then fixed frequency switching is enabled.
Other features include fixed 1MHz operating frequency, a <1μA shutdown, short-circuit protection, programmable soft-start, current limit and thermal overload protection. The LTC3534 is available in the thermally enhanced 16-lead (3mm × 5mm) DFN and 16-lead GN 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 |
|---|---|---|---|---|---|
| LTC3534EDHC#PBF | 5x3 DFN-16 | DHC | E | 05-08-1706 | Yes |
| LTC3534EDHC#TRPBF | 5x3 DFN-16 | DHC | E | 05-08-1706 | Yes |
| LTC3534EGN#PBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | Yes |
| LTC3534EGN#TRPBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | 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 | |
|---|---|---|---|---|---|---|
| LTC3534EDHC#PBF | 5x3 DFN-16 | E | $4.50 | $3.15 | Yes | |
| LTC3534EDHC#TRPBF | 5x3 DFN-16 | E | $3.21 | Yes | ||
| LTC3534EGN#PBF | SSOP-16 | E | $4.50 | $3.15 | Yes | |
| LTC3534EGN#TRPBF | SSOP-16 | E | $3.21 | 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 |
|---|---|---|---|
| DC1227A | LTC3534EDHC Demo board | 5V, 500mA Synchronous Buck-Boost DC/DC Converter | $100.00 | |
| Buy Now | |||
Applications
- Medical Instruments
- Portable Barcode Readers
- Portable Inventory Terminals
- USB to 5V Supply
- Handheld GPS
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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:
LTC3534
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.
