ST ISA025V1 User Manual

Step-down DC-DC converter at 3.3 Vout/20 A and switching

frequency of 400 kHz evaluation board based on L6730

Features

■ Input voltage, Vin: 4.5 to 14 V

■ Output voltage: 3.3 V

■ Selectable switching frequency

■ Overvoltage protection

■ Thermal shut-down

Description

This 4-layer PCB demoboard implements a step­down DC/DC converter and shows the operation
of the L6730 device in a general-purpose
application. The input voltage can range from

4.5 V to 14 V and the output voltage is 3.3 V. The
module can deliver an output current in excess of
30 A. The switching frequency is set at 400 kHz
(controller free-running FSW), but it can be
increased up to 1 MHz. A 7-position dip-switch
selects the UVLO threshold (5 V or 12 V bus), the
OVP intervention mode and the sink-mode current
capability.

STEVAL-ISA025V1

Data Brief

STEVAL-ISA025V1

August 2007 Rev 1 1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

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Board schematic STEVAL-ISA025V1

1 Board schematic

Figure 1. Scheme

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