-
2022-09-24 22:26:30
LX432 - Low Voltage Precision Shunt Regulator
DESCRIPTION The LX432 series are low voltage precision adjustable shunt regulators with a 1.24V reference voltage. The output voltage can be set to any value between 1.24V and 20V by two external resistors. These devices offer low output impedance for improved load regulation - typical output impedance 250mΩ. The operation of the LX432 series with low operating currents such as 80µA makes these devices suitable for portable and micro applications. Low voltage operation allows the LX432 to be used for low voltage supplies isolated in the feedback loop. The minimum output voltage is determined by the LX432 output voltage plus the forward voltage drop of the optocoupler LED (usually 1.24 +1.4 = 2.64V minimum). See Figure 10. The LX432 is offered in SOT-23 or TO-92 packages on pins 3 and 5 and is a dropin replacement for the TLV431 and SC431L devices.
Main Features Low Voltage Operation: 1.24V Reference Preliminary Reference Voltage Accuracy 1%
Adjustable Output Voltage from VREF to 20V
Typical output dynamic impedance minus over 250 meters with sink current capability of 80 to 20 mA
Direct replacement for TLV431
Applications Low Voltage Adjustable Power Instrumentation Computer Portable Equipment