ST ISA027V1 User Manual

Single phase step-down converter evaluation board

Features

■ BOM optimized for 12 V input / 1.25 V output @

20 A

■ High flexibility to host wide range designs

■ Customizable output voltage

■ L6726A / L6727 compatibility

■ Controller input voltage (V

12 V

■ Conversion input voltage (V

■ DPAK / SO-8 / PowerSO-8 / PowerFLAT

MOSFET compatibility

■ Multi-footprint for input and output capacitors

■ Through-hole / SMD inductor compatibility

■ 4-layer PCB

Description

) range from 5 V to

CC

) up to 13.2 V

IN

STEVAL-ISA027V1

based on the L6726A

Data Brief

STEVAL-ISA027V1

The purpose of this design is to demonstrate the
key features of STMicroelectronics' L6726A, a
new powerful new buck controller. The L6726A
allows the simple and cost effective design of
complete step-down voltage regulators. Indeed,
and provides a full solution by integrating an 0.8 V
reference, control logic and protection, and NMOS
drivers in an 8-pin package. Moreover, it features
a simple control loop with transconductance error
amplifier and soft-start programmability. The
L6726A evaluation board implements a step-down
DC-DC converter, in a four-layer PCB, and
demostrates the operation of the device in a
general purpose application. The input voltage
can range from 5 V to 12 V and the output voltage
is fixed at 1.25 V. The application can deliver an
output current up to 20 A, with a switching
frequency of 270 KHz.

December 2007 Rev 2 1/4

For further information contact your local STMicroelectronics sales office

www.st.com

4

Board schematic STEVAL-ISA027V1

1 Board schematic

Figure 1. Schematic

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