STEVAL-ISA049V2 [STMICROELECTRONICS]
Synchronous dual buck converter with inhibit demonstration board based on the ST2S06B; 基于对ST2S06B同步双降压转换器与抑制演示板
| 型号： | STEVAL-ISA049V2 |
| 厂家： | 
ST |
| 描述： | Synchronous dual buck converter with inhibit demonstration board based on the ST2S06B |
| 文件： | 总4页 (文件大小：170K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
STEVAL-ISA049V2
Synchronous dual buck converter with inhibit
demonstration board based on the ST2S06B
Data brief
Features
■ Step-down current mode PWM (1.5 MHz)
DC-DC converter
■ Fixed or adjustable output voltage from 0.8 V
■ 2% DC output voltage tolerance
■ Synchronous rectification
■ Inhibit function
■ Internal soft start for start-up current limitation
and power ON delay of 50-100 µs
■ Typical efficiency: > 90%
■ 0.5 A output current capability
■ Non-switching quiescent current: max 1 mA
overtemperature range
■ R
150 mΩ (typ.)
DS(on)
■ Uses tiny capacitors and inductors
■ RoHS compliant
Description
STEVAL-ISA049V2
This demonstration board is based on the
ST2S06B, a dual synchronous step-down DC-DC
converter optimized for powering low-voltage
digital cores in ODD applications and, generally,
used to replace the high current linear solution
when the power dissipation may cause a high
heating of the application environment.
It provides up to 0.5 A over an input voltage range
of 2.5 V to 5.5 V.
A high switching frequency (1.5 MHz) allows the
use of tiny surface-mount components. A resistor
divider to set the output voltage value, an inductor
and two capacitors are required for every channel.
In addition, a low output ripple is guaranteed by
the current mode PWM topology and by the use
of low ESR surface-mount ceramic capacitors.
The demoboard is thermal protected and current
limited to prevent damage due to accidental short-
circuit.
July 2009
Doc ID 15977 Rev 1
1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Circuit schematic
STEVAL-ISA049V2
1
Circuit schematic
Figure 1.
Schematic diagram
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2/4
Doc ID 15977 Rev 1
STEVAL-ISA049V2
Revision history
2
Revision history
Table 1.
Date
01-Jul-2009
Document revision history
Revision
Changes
1
Initial release.
Doc ID 15977 Rev 1
3/4
STEVAL-ISA049V2
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