Datasheet 搜索 > DC/DC转换器 > ST Microelectronics（意法半导体） > L4973D5.1 数据手册 > L4973D5.1 产品描述及参数 1/4 页
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L4973D5.1 产品描述及参数 - ST Microelectronics（意法半导体）
制造商:
ST Microelectronics（意法半导体）
分类:
DC/DC转换器
封装:
SOIC-20
描述:
STMICROELECTRONICS L4973D5.1 直流-直流开关降压(逐步递减)稳压器, 可调, 8V-55V输入, 5.1V-50V输出, 3.5A输出, SOIC-20
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L4973D5.1数据手册
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Data brief
For further information contact your local STMicroelectronics sales office.
April 2011 Doc ID 018689 Rev 1 1/4
4
STEVAL-ISA090V1
3.5 A step-down switching regulator based on the L4973
Features
■ Input voltage range: 8 V to 55 V
■ Output voltage: 5.1 V ± 3% (line, load and
thermal)
■ Output ripple: 51 mV
■ Output current range: 1 mA to 3.5 A
■ Max output ripple current: 30%
■ Current limit: 4.5 A
■ Switching frequency: 150 kHz
■ RoHS compliant
Description
The STEVAL-ISA090V1 demonstration board
provides a platform for evaluation of the L4973, a
3.5 A step-down monolithic power switching
regulator operating in continuous mode.
Based on the selection of the external
components, the device can operate in the entire
input voltage range of 8 V < V
IN
< 55 V. The
output voltage is limited by the voltage rating of
the output capacitor, so it can be adjusted within
the 3.3 V < V
OUT
< 30 V range through voltage
divider R
3
, R
4
. The input and output capacitors
are capable of sustaining the RMS current within
the operating range.
STEVAL-ISA090V1
www.st.com
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