Datasheet 搜索 > 电压基准芯片 > TI（德州仪器） > LMV431ACM5 数据手册 > LMV431ACM5 开发手册 1/16 页
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LMV431ACM5 开发手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
电压基准芯片
封装:
SOT-23-5
描述:
TEXAS INSTRUMENTS LMV431ACM5 电压基准, 精密, 分流 - 可调, LMV431A系列, 1.24V至30V, SOT-23-5
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典型应用电路图在P1P2P13P14
原理图在P2
封装尺寸在P15P16
型号编码规则在P3
标记信息在P3
功能描述在P1
技术参数、封装参数在P4P7
应用领域在P1P13P14
电气规格在P4P5P6P7P8P9P10P11P12
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LMV431ACM5数据手册
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LMV431/LMV431A/LMV431B
Low-Voltage (1.24V) Adjustable Precision Shunt
Regulators
General Description
The LMV431, LMV431A and LMV431B are precision 1.24V
shunt regulators capable of adjustment to 30V. Negative
feedback from the cathode to the adjust pin controls the
cathode voltage, much like a non-inverting op amp configu-
ration (Refer to Symbol and Functional diagrams). A two
resistor voltage divider terminated at the adjust pin controls
the gain of a 1.24V band-gap reference. Shorting the cath-
ode to the adjust pin (voltage follower) provides a cathode
voltage of a 1.24V.
The LMV431, LMV431A and LMV431B have respective ini-
tial tolerances of 1.5%, 1% and 0.5%. The LMV431 and
LMV431A are available in commercial and Industrial tem-
perature ranges. The LMV431B is only available in commer-
cial temperature range.
The LMV431, LMV431A and LMV431B functionally lends
themselves to several applications that require zener diode
type performance at low voltages. Applications include a 3V
to 2.7V low drop-out regulator, an error amplifier in a 3V
off-line switching regulator and even as a voltage detector.
These parts are typically stable with capacitive loads greater
than 10nF and less than 50pF.
The LMV431, LMV431A and LMV431B provide performance
at a competitive price.
Features
n Low Voltage Operation/Wide Adjust Range (1.24V/30V)
n 0.5% Initial Tolerance (LMV431B)
n Temperature Compensated for Industrial Temperature
Range (39 PPM/˚C for the LMV431AI)
n Low Operation Current (55µA)
n Low Output Impedance (0.25Ω)
n Fast Turn-On Response
n Low Cost
Applications
n Shunt Regulator
n Series Regulator
n Current Source or Sink
n Voltage Monitor
n Error Amplifier
n 3V Off-Line Switching Regulator
n Low Dropout N-Channel Series Regulator
Connection Diagrams
TO92: Plastic Package
10095801
Top View
SOT23-5
10095844
*
Pin 1 is not internally connected.
*
Pin 2 is internally connected to Anode pin. Pin 2 should be either floating
or connected to Anode pin.
Top View
SOT23-3
10095867
Top View
June 2003
LMV431/LMV431A/LMV431B Low-Voltage (1.24V) Adjustable Precision Shunt Regulators
© 2003 National Semiconductor Corporation DS100958 www.national.com
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