STEVAL-ISA079V2 [STMICROELECTRONICS]
High-efficiency monolithic synchronous step-down regulator based on the L6928; 基于L6928高效率单片同步降压型稳压器
| 型号： | STEVAL-ISA079V2 |
| 厂家： | 
ST |
| 描述： | High-efficiency monolithic synchronous step-down regulator based on the L6928 |
| 文件： | 总4页 (文件大小：106K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
STEVAL-ISA079V2
High-efficiency monolithic synchronous step-down regulator based
on the L6928
Data brief
Features
■ 2.0 V to 5.5 V battery input range
■ High efficiency: up to 95%
■ Extremely low quiescent current
■ 1 µA max shutdown supply current
■ 800 mA max output current
■ Adjustable output voltage from 0.6 V
■ Low dropout operation: up to 100% duty cycle
■
1% output voltage accuracy
■ 1.4 MHz switching frequency
■ Externally synchronizable from 1 MHz to 2
STEVAL-ISA079V2
MHz
■ Short-circuit protection
■ RoHS compliant
Description
The STEVAL-ISA079V2 demonstration board is
based on the L6928 DC-DC monolithic regulator,
specifically designed to provide extremely high
efficiency.
The L6928 supply voltage can be as low as 2.0 V,
allowing its use in single Li-Ion cell supplied
applications.
The output voltage can be selected by an external
divider down to 0.6 V. The duty cycle can saturate
to 100%, allowing low dropout operation.
Note:
Previous part number EVAL6928Q1
October 2011
Doc ID 022262 Rev 2
1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Application diagram
STEVAL-ISA079V2
1
Application diagram
Figure 1.
Application diagram
L4.7µH
VOUT=1.8V
5
VCC
VIN=2V to5.5V
LX
6
7
R3
C4
R4
200K
10µF
6.3V
100K
SYNC
RUN
L6928
C1
10mF
6.3V
8
1
PGOOD
VFB
3
2
4
R2
100K
COMP
GND
C3
220pF
R1
10K
AM10172V1
2/4
Doc ID 022262 Rev 2
STEVAL-ISA079V2
Revision history
2
Revision history
Table 1.
Date
Document revision history
Revision
Changes
23-Sep-2011
06-Oct-2011
1
2
Initial release.
Minor text changes on coverpage.
Doc ID 022262 Rev 2
3/4
STEVAL-ISA079V2
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4/4
Doc ID 022262 Rev 2
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