ST STEVAL-ISA067V1 Dual step-down controller with auxiliary voltages demonstration board based on the PM6681A for industrial system power
Summary
The STEVAL-ISA067V1 is a demonstration board designed for engineers developing complex industrial power systems. Based on the dual step-down controller PM6681A, it allows comprehensive testing of high-efficiency voltage regulation in demanding environments. The manual provides access to all device functions, showcasing two adjustable outputs (e.g., 3.3V and 1.8V) operating from a wide input range of 5.5 V to 36 V. This tool is essential for validating robust power solutions that require advanced protection, precise current sensing, and controlled voltage delivery.
Page 1 Text Content
STEVAL-ISA067V1
Dual step-down controller with auxiliary voltages demonstration board based on the PM6681A for industrial system power
Data brief
Features 5.5 V to 36 V input voltage range Vout1: 3.3 V, Iout1 > 2.5 A (or adjustable output voltage) Vout2: 1.8 V, Iout2 > 2.5 A (or adjustable output voltage) 0.9 - 3.3 V adjustable LDO delivers 100 m A peak current 5 V LDO delivers 100 m A peak current 1.237 V ± 1% reference voltage available Loss-less current sensing using low-side MOSFET RDS(on) Negative current limit Soft-start internally fixed at 2 ms
STEVAL-ISA067V1
Soft output discharge
respectively. Each switching section delivers more
Latched UVP
than 2.5 A output current.
Non-latched OVP
An internal linear regulator provides a fixed 5 V
Selectable pulse-skipping at light loads
output voltage. Another internal linear regulator Selectable minimum frequency (33 k Hz) in provides an adjustable output voltage (default 2.5 pulse-skip mode V). Both linear regulators can deliver up to 100 m A peak current.
4 m W maximum quiescent power Independent power-good signals Output voltage ripple compensation Ro HS compliant
Description This demonstration board is based on the PM6681A, a dual step-down controller with adjustable output voltages that can be used in industrial power systems. The PM6681A demonstration board allows testing all the device's functions and provides two switching sections, with (typically) 3.3 V (OUT1) and 1.8 V (OUT2) outputs from 5.5 V to 36 V input voltage. The typical operating switching frequency of the two available sections is 200 k Hz/300 k Hz,
April 2009 Doc ID 15643 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com
Page Summary Contents For ST STEVAL-ISA067V1 Dual step-down controller with auxiliary voltages demonstration board based on the PM6681A for industrial system power
Manual Details
| Brand | Dual |
|---|---|
| Pages | 4 |
| File Size | 198.55 KB |
| Published | June 03, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What is the acceptable input voltage range for this board?
The STEVAL-ISA067V1 supports an input voltage range from 5.5 V up to 36 V.
Can I adjust the output voltages on the system?
Yes, one internal linear regulator provides an adjustable output voltage (defaulting to 2.5 V), and another can deliver a fixed 5 V.
Does the controller support soft-start functionality?
Yes, the board features an internally fixed soft-start time of 2 ms and addresses soft output discharge.
What is the minimum selectable operating frequency?
The system allows for a selectable minimum frequency down to 33 kHz.