LT3473
PRODUCTIONMicropower 1A Boost Converter with Schottky and Output Disconnect
- Part Models
- 4
- 1ku List Price
- Starting From $3.37
Overview
- Tiny Solution Size
- Low Quiescent Current:
- 150µA in Active Mode (VIN = 3.6V, VOUT = 15V, No Load)
- 1µA in Shutdown Mode
- Internal 1A, 36V Switch
- Integrated Schottky Diode
- Integrated PNP Output Disconnect
- Internal Reference Override Pin
- PGOOD Pin
- 25V at 80mA from 3.6V Input
- Auxiliary NPNs for Intermediate Bias Voltages (LT3473A)
- Automatic Burst Mode® Operation at Light Load
- Constant Switching Frequency: 1.2MHz
- Thermal Shutdown
- Input Range: 2.2V to 16V
- Low Profile (3mm × 3mm) DFN Package (LT3473)
- Low Profile (4mm × 3mm) DFN Package (LT3473A)
The LT3473/LT3473A are micropower step-up DC/DC converters with integrated Schottky diode and output disconnect circuitry in low profile DFN packages. The small package size, high level of integration and the use of tiny SMT components yield a solution size of less than 50mm2. The internal 1A switch allows the device to deliver 25V at up to 80mA from a Li-Ion cell, while automatic Burst Mode operation maintains efficiency at light load. An auxiliary reference input (CTRL) allows the user to override the internal 1.25V feedback reference with any lower value, allowing full control of the output voltage during operation. A PGOOD pin sinks current when the output voltage reaches 90% of final value.
The LT3473A includes two NPN transistors for generating intermediate bias voltages from the output and is offered in a 12-lead (4mm × 3mm) DFN package. The LT3473 does not include these NPNs and is offered in an 8-lead (3mm × 3mm) package.
The rugged 36V switch and output disconnect circuitry allow outputs up to 34V to be easily generated in a simple boost topology.
Applications
- OLED Bias
- CCD Bias
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Press Release 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 |
|---|---|---|---|
| LT3473AEDE#PBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LT3473AEDE#TRPBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LT3473EDD#PBF | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LT3473EDD#TRPBF | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) |
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 |
|---|---|---|
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT3473
- LT3473A
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
LT3473EDD | Li-Ion to 25V Step-Up DC/DC Converter, 3V to 4.2VIN, 25VOUT @ 80mA