LTC3533
RECOMMENDED FOR NEW DESIGNS2A Wide Input Voltage Synchronous Buck-Boost DC/DC Converter
- Part Models
- 2
- 1ku List Price
- Starting From $5.38
Overview
- Regulated Output with Input Voltages Above, Below or Equal to the Output
- 1.8V to 5.5V (Input) and 5.25V (Output) Voltage Range
- 0.8A Continuous Output Current: VIN > 1.8V
- 2A Continuous Output Current: VIN > 3V
- Single Inductor
- Synchronous Rectification: Up to 96% Efficiency
- Programmable Burst Mode® Operation: IQ = 40µA
- Output Disconnect in Shutdown
- Programmable Frequency from 300kHz to 2MHz
- <1µA Shutdown Current
- Small Thermally Enhanced 14-Lead (3mm × 4mm × 0.75mm) DFN package
The LTC3533 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 cell lithium-ion/polymer or multi-cell alkaline/NiMH applications where the output voltage is within the input voltage range.
The LTC3533 features programmable Burst Mode operation, extended VIN and VOUT ranges down to 1.8V, and increased output current. Switching frequencies up to 2MHz are programmed with an external resistor. The Burst Mode threshold is programmed with a single resistor from the BURST pin to GND.
Other features include 1µA shutdown current, short circuit protection, programmable soft-start, current limit and thermal shutdown. The LTC3533 is housed in the thermally enhanced 14-lead (3mm × 4mm × 0.75mm) DFN package.
Applications
- GSM Modems
- Handheld Instruments
- Digital Cameras
- Smart Phones
- Media Players
- Miniature Hard Disk Drive Power
Documentation
Data Sheet 1
User Guide 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. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3533EDE#PBF | 14-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC3533EDE#TRPBF | 14-Lead DFN (4mm x 3mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LTC3533EDE#PBF | PRODUCTION | |
| LTC3533EDE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Switching Regulators & Controllers 1 | ||
| LTC3112 | RECOMMENDED FOR NEW DESIGNS | 15V, 2.5A Synchronous Buck-Boost DC/DC Converter |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3533
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.
Evaluation Kits
LTC3533EDE Demo Board | High Efficiency Synchronous Buck-Boost Converter