STEVAL-ISA067V1 [STMICROELECTRONICS]
Dual step-down controller with auxiliary voltages demonstration board based on the PM6681A for industrial system power; 基于该PM6681A工业系统电源与辅助电压的演示板双降压控制器
| 型号： | STEVAL-ISA067V1 |
| 厂家： | 
ST |
| 描述： | Dual step-down controller with auxiliary voltages demonstration board based on the PM6681A for industrial system power |
| 文件： | 总4页 (文件大小：204K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
■ V
: 3.3 V, I
> 2.5 A (or adjustable output
out1
out1
voltage)
■ V
: 1.8 V, I
> 2.5 A (or adjustable output
out2
out2
voltage)
■ 0.9 - 3.3 V adjustable LDO delivers 100 mA
peak current
■ 5 V LDO delivers 100 mA peak current
■ 1.237 V 1ꢀ reference voltage available
■ Loss-less current sensing using low-side
MOSFET R
DS(on)
■ Negative current limit
■ Soft-start internally fixed at 2 ms
■ Soft output discharge
STEVAL-ISA067V1
respectively. Each switching section delivers more
than 2.5 A output current.
■ Latched UVP
■ Non-latched OVP
An internal linear regulator provides a fixed 5 V
output voltage. Another internal linear regulator
provides an adjustable output voltage (default 2.5
V). Both linear regulators can deliver up to 100
mA peak current.
■ Selectable pulse-skipping at light loads
■ Selectable minimum frequency (33 kHz) in
pulse-skip mode
■ 4 mW maximum quiescent power
■ Independent power-good signals
■ Output voltage ripple compensation
■ RoHS 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 kHz/300 kHz,
April 2009
Doc ID 15643 Rev 1
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For further information contact your local STMicroelectronics sales office.
www.st.com
4
Circuit schematic
STEVAL-ISA067V1
1
Circuit schematic
Figure 1.
Schematic diagram
AM01437v1
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Doc ID 15643 Rev 1
STEVAL-ISA067V1
Revision history
2
Revision history
Table 1.
Date
29-Apr-2009
Document revision history
Revision
Changes
1
Initial release.
Doc ID 15643 Rev 1
3/4
STEVAL-ISA067V1
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