LTC3533
2A Wide Input Voltage Synchronous Buck-Boost DC/DC Converter
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Overview
Features and Benefits
- 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
Product Details
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
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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R415 Reliability Data3/23/2018
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DC999A - Demo Manual9/17/2015
Tools & Simulations
LTspice
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
LTC3533
Product Recommendations
LTC3533 Companion Parts
Recommended Related Parts
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC3533EDE#PBF | Material Declaration | Reliability Data | 14-Lead DFN (4mm x 3mm w/ EP) | |
| LTC3533EDE#TRPBF | Material Declaration | Reliability Data | 14-Lead DFN (4mm x 3mm w/ EP) | |
| Wafer Fabrication Data | R415 Reliability Data |
Support & Discussions
LTC3533 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.