EVAL5987A: 1.8V @ 3A, 2.9 ~ 18 Vin

Summary

The EVAL5987/A demonstration board provides the design engineer with a fully functional stepdown switching regulator with an output current of up to 3 A. The board integrates STMicroelectronics’ L5987/A step-down switching regulator, together with all the external components required for a typical application.

The rated voltage of the input capacitor and the Schottky diode rectifier repetitive peak reverse voltage are both 25 V, making the board capable of covering the entire 2.9 V - 18 V input voltage range of the L5987/A device.

The board features an external resistor divider (R1 and R2) designed for an output voltage of 1.8 V.

The switching frequency on the demonstration board is set to 500 kHz by means of the R5 resistor connected to pin Fsw.

Specifications

Manufacturer STMicroelectronics
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number 497-8370-ND
Eval Board Supplier STMicroelectronics
Eval Board Board not Stocked
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 1.8 V
Current Out 3 A
Voltage In 2.9 ~ 18 V
Efficiency @ Conditions >75%, 5V in, 1.8V @ 0.3 ~ 3 A
>75%, 3.3V in, 1.8V @ 0.3 ~ 2.8 A
Voltage Out Range 0.6 ~ Vin
Features Over Current Protection
Over Voltage Protection
Shutdown, Enable, Standby
Soft Start
Synchronizable
Thermal Protection
Switching Frequency 500 kHz
Standby Current [Typical] 20 µA
Quiescent Current [Typical]
Component Count + Extras 14 + 5
Internal Switch Yes
Design Author STMicroelectronics
Application / Target Market Computers
FPGA / DSP / Processors
Point of Load (PoL)
Set-Top Boxes
Telecom
Standby Current [Maximum] 30 µA
Quiescent Current [Maximum] 2.4 mA
Main I.C. Base Part L5987A
Date Created By Author
Date Added To Library 2011-03

Support Documents & Media

L5987 - Datasheet / Board User Guide EVAL5987A - Data Brief

Media

EVAL5987A_Schematic.JPG EVAL5987A_Board.JPG