LTC3528
LTC3528B
RECOMMENDED FOR NEW DESIGNS
1A, 1MHz Synchronous Step-Up DC/DC Converters in 3mm x 2mm DFN
- Part Models
- 4
- 1ku List Price
- Starting From $2.97
Overview
- Delivers 3.3V at 200mA from a Single Alkaline/NiMH Cell or 3.3V at 400mA from Two Cells
- VIN Start-Up Voltage: 700mV
- 1.6V to 5.25V VOUT Range
- Up to 94% Efficiency
- Output Disconnect
- 1MHz Fixed Frequency Operation
- VIN > VOUT Operation
- Integrated Soft-Start
- Current Mode Control with Internal Compensation
- Burst Mode® Operation with 12µA Quiescent Current (LTC3528)
- Low Noise PWM Operation (LTC3528B)
- Internal Synchronous Rectier
- Logic Controlled Shutdown: <1µA
- Anti-Ringing Control
- Low Prole (3mm x 2mm x 0.75mm) DFN Package
The LTC3528/LTC3528B are synchronous, fixed frequency step-up DC/DC converters with output disconnect. High efficiency synchronous rectification, in addition to a 700mV start-up voltage and operation down to 500mV once started, provides longer run-time for single or multiple cell battery-powered products.
A switching frequency of 1MHz minimizes solution foot- print by allowing the use of tiny, low prole inductors and ceramic capacitors. The current mode PWM is internally compensated, simplifying the design process. The LTC3528 enters Burst Mode operation at light loads, while the LTC3528B features continuous switching at light loads. Anti-ringing circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current, open-drain power good output, short- circuit protection and thermal overload protection.
The LTC3528/LTC3528B are offered in an 8-lead 3mm x 2mm x 0.75mm DFN package.
| Frequency | Burst Mode | |
| LTC3528 | 1MHz | Yes |
| LTC3528B | 1MHz | No |
| LTC3528-2 | 2MHz | Yes |
| LTC3528B-2 | 2MHz | No |
Applications
- Medical Instruments
- Flash-Based MP3 Players
- Noise Canceling Headphones
- Wireless Mice
- Bluetooth Headsets
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 |
|---|---|---|---|
| LTC3528BEDDB#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC3528BEDDB#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC3528EDDB#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC3528EDDB#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LTC3528
- LTC3528-2
- LTC3528B
- LTC3528B-2
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
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