Design contains obsolete parts

STEVAL-ISA039V1: 1.25 @ 5A, 5 ~ 12V in

Summary

The purpose of this design is to demonstrate the key features of STMicroelectronics L6727 a new powerful buck controller. The L6727 allow simple, cost effective design of complete step-down voltage regulators. It provides a full solution by integrating a 0.8V reference, control logic and protection, and NMOS drivers in an 8-pin package.

This L6727 demo board realizes in a two layer PCB a step-down DC/DC converter and shows the operation of the device in a general purpose low-current application. The input voltage can range from 5V to 12V buses and the output voltage is fixed at 1.25V. The application can deliver an output current in excess of 5A. The switching frequency is 300 kHz.

Specifications

Manufacturer STMicroelectronics
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number 497-8266-ND
Eval Board Supplier STMicroelectronics
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 1.25 V
2.5 V
Current Out 5 A
Voltage In 5 ~ 12 V
Efficiency @ Conditions >92%, 5V in, 2.5V @ 1.2 ~ 5 A
>86%, 5V in, 1.25V @ 1.1 ~ 5 A
>84%, 12V in, 2.5V @ 2 ~ 5 A
>76%, 12V in, 1.25V @ 2 ~ 5 A
Voltage Out Range - Not Given
Features Current Limit (Adj. or Fixed)
Over Current Protection
Shutdown, Enable, Standby
Soft Start
Under Voltage Protection, Brown-Out
Switching Frequency 300 kHz
Standby Current [Typical] 20 µA
Quiescent Current [Typical] 6 mA
Component Count + Extras 27 + 4
Internal Switch No
Design Author STMicroelectronics
Application / Target Market Computers
FPGA / DSP / Processors
Point of Load (PoL)
Standby Current [Maximum]
Quiescent Current [Maximum]
Main I.C. Base Part L6727
Date Created By Author 2010-04
Date Added To Library 2012-10

Support Documents & Media

L6727 - Datasheet and Eval Board Guides

Media

STEVAL_ISA039V1_Schematic_Full.png STEVAL_ISA039V1_Board_Full.jpg STEVAL_ISA039V1_Chart_Full.png