STEVAL-ISA047V2 [STMICROELECTRONICS]
1.5 A / 3.3 V step-down DC-DC converter demonstration board based on the ST1S03A; 1.5 A / 3.3 V的降压型DC -DC转换器的示范基于所述ST1S03A板![STEVAL-ISA047V2](http://pdffile.icpdf.com/pdf1/p00192/img/icpdf/STEVAL_1083502_icpdf.jpg)
型号: | STEVAL-ISA047V2 |
厂家: | ![]() |
描述: | 1.5 A / 3.3 V step-down DC-DC converter demonstration board based on the ST1S03A |
文件: | 总4页 (文件大小:219K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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STEVAL-ISA047V2
1.5 A / 3.3 V step-down DC-DC converter
demonstration board based on the ST1S03A
Data brief
Features
■ Step-down current mode PWM (1.5 MHz)
DC-DC converter
■ 2% DC output voltage tolerance
■ Internal soft-start for start-up current limitation
and power on delay of 50-100 µs
■ Typical efficiency: > 85%
■ Inhibit function
■ 1.5 A output current capability
■ Not switching quiescent current: max 1.5 mA
(overtemperature range)
■ Switch V : max 200 mV @ I
= 750 mA
DS
SW
STEVAL-ISA047V2
■ Uses tiny capacitors and inductors
■ RoHS compliant
Description
This demonstration board is based on the
ST1S03A, an adjustable current mode PWM
step-down DC-DC converter with internal 1.5 A
power switch, packaged in a 6-lead DFN 3x3 mm.
It's a complete 1.5 A switching regulator with its
internal compensation eliminating additional
component.
The constant frequency, current mode, PWM
architecture and stable operation with ceramic
capacitors results in low, predictable output ripple.
However, in order to maximize the power
conversion efficiency with light load, the regulator
reduces automatically the switching frequency
when the output load becomes less than 250 mA
typically.
July 2009
Doc ID 15973 Rev 1
1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Circuit schematic
STEVAL-ISA047V2
1
Circuit schematic
Figure 1.
Schematic diagram
2/4
Doc ID 15973 Rev 1
STEVAL-ISA047V2
Revision history
2
Revision history
Table 1.
Date
01-Jul-2009
Document revision history
Revision
Changes
1
Initial release.
Doc ID 15973 Rev 1
3/4
STEVAL-ISA047V2
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