Products
Back
Manufacturers
Back
Resources
Back
- Building
- Content
- Applications & Technologies
- Articles & Blogs
- eMagazines & eBooks
- Maker.io
- Product Training Library
- TechForum
- Training & Events
- Video Library
- Search All
Back
Back
- Programs & Services
- Academic Program
- Automation & Control
- Design & Integration Services
- Digital Solutions
- IoT Solutions
- Part Tracing
- Product Services
Back
- Buying
- Tools
- myLists
- Quotes
- Products
- Manufacturers
Part Tracing

TechForum

Webinars

Scheme It
Request a Quote

LM3485EVAL: 3.3V @ 1A, 7 ~ 28 Vin

Summary

The LM3485 is a Hysteretic P-FET Buck Controller, which uses a pulse-frequency modulation (PFM) scheme to regulate the output voltage.

This LM3485 demo board and the recommended components are intended to demonstrate the performance with a 3.3V output from a 12V source. The demo board can be used with source voltages from 7V to 28V to deliver output load currents up to 1A. By changing the size of a single resistor, regulated output voltages from 1.242V to 5V can be obtained.

Specifications

Manufacturer	Texas Instruments
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	LM3485EVAL-ND
Eval Board Supplier	Texas Instruments
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	3.3 V
Current Out	1 A
Voltage In	7 ~ 28 V
Efficiency @ Conditions	>83%, 12V in, 3.3V @ 0.1 ~ 1 A >77%, 24V in, 3.3V @ 0.1 ~ 1 A
Voltage Out Range	1.25 ~ 5 V
Features	Current Limit (Adj. or Fixed)
Switching Frequency	- Not Given
Standby Current [Typical]
Quiescent Current [Typical]	250 µA
Component Count + Extras	11 + 3
Internal Switch	No
Design Author	Texas Instruments
Application / Target Market	Computers FPGA / DSP / Processors LCD TV / Monitor Point of Load (PoL) Portable Devices Set-Top Boxes USB Powered Devices
Standby Current [Maximum]
Quiescent Current [Maximum]	400 µA
Main I.C. Base Part	LM3485
Date Created By Author
Date Added To Library	2011-03