LMV431A

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1%, low-voltage (1.24-V) adjustable precision shunt regulator

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Data sheet

document-pdfAcrobat LMV431l;LMV431Al;LMV431B Low-Voltage (1.24V) Adj Precision Shunt Regs datasheet (Rev. G)

LMV431A

ACTIVE

Data sheet

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Product details

VO (V)

1.24

Initial accuracy (max) (%)

1

VO adj (min) (V)

1.24

VO adj (max) (V)

30

Iz for regulation (min) (µA)

80

Reference voltage (V)

adjustable

Rating

Catalog

Temp coeff (max) (ppm/°C)

138

Operating temperature range (°C)

-40 to 85

Iout/Iz (max) (mA)

15

VO (V)

1.24

Initial accuracy (max) (%)

1

VO adj (min) (V)

1.24

VO adj (max) (V)

30

Iz for regulation (min) (µA)

80

Reference voltage (V)

adjustable

Rating

Catalog

Temp coeff (max) (ppm/°C)

138

Operating temperature range (°C)

-40 to 85

Iout/Iz (max) (mA)

15

SOT-23 (DBV)

5

8.12 mm² 2.9 x 2.8

SOT-23 (DBZ)

3

6.9204 mm² 2.92 x 2.37

TO-92 (LP)

3

19.136 mm² 5.2 x 3.68

Low-Voltage Operation/Wide Adjust Range
(1.24 V/30 V)
0.5% Initial Tolerance (LMV431B)
Temperature Compensated for Industrial
Temperature Range (39 PPM/°C for
the LMV431AI)
Low Operation Current (55 µA)
Low Output Impedance (0.25 Ω)
Fast Turn-On Response
Low Cost

Low-Voltage Operation/Wide Adjust Range
(1.24 V/30 V)
0.5% Initial Tolerance (LMV431B)
Temperature Compensated for Industrial
Temperature Range (39 PPM/°C for
the LMV431AI)
Low Operation Current (55 µA)
Low Output Impedance (0.25 Ω)
Fast Turn-On Response
Low Cost

The LMV431, LMV431A and LMV431B are precision 1.24 V shunt regulators capable of adjustment to 30 V. Negative feedback from the cathode to the adjust pin controls the cathode voltage, much like a non-inverting op amp configuration (Refer to Symbol and Functional Diagrams). A two-resistor voltage divider terminated at the adjust pin controls the gain of a 1.24 V band-gap reference. Shorting the cathode to the adjust pin (voltage follower) provides a cathode voltage of a 1.24 V.

The LMV431, LMV431A and LMV431B have respective initial tolerances of 1.5%, 1%, and 0.5%, and functionally lend themselves to several applications that require zener diode type performance at low voltages. Applications include a 3 V to 2.7 V low drop-out regulator, an error amplifier in a 3 V off-line switching regulator and even as a voltage detector. These parts are typically stable with capacitive loads greater than 10 nF and less than 50 pF.

The LMV431, LMV431A and LMV431B provide performance at a competitive price.

The LMV431, LMV431A and LMV431B are precision 1.24 V shunt regulators capable of adjustment to 30 V. Negative feedback from the cathode to the adjust pin controls the cathode voltage, much like a non-inverting op amp configuration (Refer to Symbol and Functional Diagrams). A two-resistor voltage divider terminated at the adjust pin controls the gain of a 1.24 V band-gap reference. Shorting the cathode to the adjust pin (voltage follower) provides a cathode voltage of a 1.24 V.

The LMV431, LMV431A and LMV431B have respective initial tolerances of 1.5%, 1%, and 0.5%, and functionally lend themselves to several applications that require zener diode type performance at low voltages. Applications include a 3 V to 2.7 V low drop-out regulator, an error amplifier in a 3 V off-line switching regulator and even as a voltage detector. These parts are typically stable with capacitive loads greater than 10 nF and less than 50 pF.

The LMV431, LMV431A and LMV431B provide performance at a competitive price.

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	Type	Title	Date
*	Data sheet	LMV431l;LMV431Al;LMV431B Low-Voltage (1.24V) Adj Precision Shunt Regs datasheet (Rev. G)	22 Sep 2014
	E-book	Voltage Supervisor and Reset ICs: Tips, Tricks and Basics	28 Jun 2019
	Application note	TO-92 Packing Options / Ordering Instructions (Rev. A)	23 Jun 2010

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

LMV431A PSpice Transient Model

SNVMA25.ZIP (57 KB) - PSpice Model

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Simulation model

LMV431A Unencrypted PSpice Transient Model

SNVMA26.ZIP (1 KB) - PSpice Model

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Calculation tool

SHUNT-REFERENCE-CALC — Shunt Reference Selector and Design Calculator

This tool guides the user through the design process for the TLx431 and LM40x0 family of shunt voltage references. This calculator will recommend resistance and capacitance values to optimally meet the user's desired specifications.

Supported products & hardware

Products

Shunt voltage references

ATL431 — 2.5-V low-IQ adjustable precision shunt regulator

ATL431LI — Low-IQ programmable shunt regulator offered in an ultra-small DQN package

ATL431LI-Q1 — Automotive, high-bandwidth, low-IQ programmable shunt regulator (pinout: KRA)

ATL432 — 2.5-V precision programmable shunt regulator

ATL432LI — High-bandwidth, low-IQ programmable shunt regulator (pinout: RKA)

ATL432LI-Q1 — Automotive, high-bandwidth, low-IQ programmable shunt regulator (pinout: RKA)

LM4030 — Ultra-high-precision shunt voltage reference

LM4040 — Fixed voltage, 45-µA, precision micropower shunt voltage reference

LM4040-N — 100-ppm/°C precision micropower shunt voltage reference

LM4040-N-Q1 — Automotive, 100-ppm/°C precision micropower shunt voltage reference

LM4040C25-EP — Enhanced Product 2.5-V Precision Micropower Shunt Voltage Reference, 0.5% accuracy

LM4041-N — Fixed & adjustable, 45-µA, precision micropower shunt voltage reference

LM4041-N-Q1 — Automotive, precision micropower shunt voltage reference

LM4041A12 — 1.2-V precision micropower shunt voltage reference with 0.1% accuracy

LM4041B — Adjustable, precision micropower shunt voltage reference with 0.2% accuracy

LM4041B12 — 1.2-V precision micropower shunt voltage reference with 0.2% accuracy

LM4041C — Adjustable, precision micropower shunt voltage reference with 0.5% accuracy

LM4041C12 — 1.2-V precision micropower shunt voltage reference with 0.5% accuracy

LM4041D — Adjustable, precision micropower shunt voltage reference with 1% accuracy

LM4041D12 — 1.2-V precision micropower shunt voltage reference with 1% accuracy

LM4050-N — 50-ppm/°C precision micropower shunt voltage reference

LM4050-N-Q1 — Automotive, 50-ppm/°C precision micropower shunt voltage reference

LM4050QML-SP — Radiation-hardened QMLV, 2.5-V or 5-V shunt voltage reference

LM4051-N — Fixed & adjustable, precision micropower shunt voltage reference

LMV431 — 1.5%, low-voltage (1.24-V) adjustable precision shunt regulator

LMV431A — 1%, low-voltage (1.24-V) adjustable precision shunt regulator

LMV431B — 0.5%, low-voltage (1.24-V) adjustable precision shunt regulator

TL431 — Adjustable precision shunt regulator

TL431-Q1 — Automotive adjustable precision shunt regulator (pin layout: KRA)

TL431C — 2% adjustable precision shunt regulator

TL431LI — Adjustable precision shunt regulator with optimized reference current (pin layout: KRA)

TL431LI-Q1 — Automotive, adjustable, precision shunt regulator with optimized reference current

TL432 — Adjustable precision shunt regulator (reverse pinout)

TL432-Q1 — Automotive adjustable precision shunt regulator (pin layout: RKA)

TL432LI — Adjustable precision shunt regulator with optimized reference current (pin layout: RKA)

TL432LI-Q1 — Automotive, adjustable, precision shunt regulator with optimized reference current

TLA431 — All-capacitor stable precision programmable reference with KRA pin layout

TLV431 — 1.5% accuracy, low-voltage, adjustable precision shunt regulator

TLV431A — 1% accuracy, low-voltage, adjustable precision shunt regulator

TLV431A-Q1 — Automotive, low-voltage adjustable precision shunt regulator

TLV431B — 0.5% accuracy, low-voltage, adjustable precision shunt regulator

TLV431B-Q1 — Automotive, low-voltage adjustable precision shunt regulator

TLVH431 — 1.5% low-voltage wide-operating current adjustable precision shunt regulator

TLVH431A — 1% low-voltage wide-operating current adjustable precision shunt regulator

TLVH431A-Q1 — Automotive, low-voltage adjustable precision shunt regulator

TLVH431B — 0.5% low-voltage wide-operating current adjustable precision shunt regulator

TLVH431B-EP — Enhanced-plastic 0.5% low-voltage wide-operating-current adjustable precision shunt regulator

TLVH431B-Q1 — Automotive, low-voltage adjustable precision shunt regulator (reverse pinout)

TLVH432 — 1.5% low-voltage wide-operating current adjustable precision shunt regulator (reverse pinout)

TLVH432A — 1% low-voltage wide-operating current adjustable precision shunt regulator (reverse pinout)

TLVH432B — 0.5% low-voltage wide-operating current adjustable precision shunt regulator (reverse pinout)

General-purpose op amps

TLV4313 — Quad, 5.5-V, 1-MHz, low quiescent current (65-μA), RRIO operational amplifier

TLV4314 — Quad, 5.5-V, 3-MHz, RRIO operational amplifier

TLV4314-Q1 — Automotive-grade, quad, 5.5-V, 3-MHz, RRIO operational amplifier

TLV4316 — Quad, 5.5-V, 10-MHz, RRIO operational amplifier

TLV4316-Q1 — Automotive-grade, quad, 5.5-V, 10-MHz, RRIO operational amplifier

TLV4379 — Quad, 5.5-V, 90-kHz, low quiescent current (4-μA), RRIO operational amplifier

Precision op amps (Vos<1mV)

TLV4333 — Quad, 350-kHz, low-noise, RRIO, CMOS operational amplifier for cost-sensitive systems

TLV4376 — Quad 5.5-MHz, 100-µV offset, 8-nV/√Hz noise, 815-µA power, precision operational amplifiers

TLV4387 — Quad, ultra-high-precision (10 μV) zero-drift (0.01 μV/°C) low-input-bias-current op amp

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Calculation tool

SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR — Shunt Voltage Reference External Resistor Quick Start Calculator

This external resistor quick-start calculator tool lets you easily calculate valid external resistor values relative to voltage reference, supply and load-current bounds. With these inputs, you can instantly view the resulting calculations and use the color-coded indications to understand (...)

Supported products & hardware

Products

Die & wafer services

LM336-2.5-MIL — Shunt Voltage Reference

Shunt voltage references

ATL431 — 2.5-V low-IQ adjustable precision shunt regulator

LM136-2.5-N — Voltage Reference Diode

LM136-5.0 — 5.0V Reference Diode

LM136-5.0QML — 5.0V Reference Diode

LM136A-2.5QML — 2.5V Reference Diode

LM136A-2.5QML-SP — Radiation-hardened QMLV, 2.5-V shunt voltage reference

LM136A-5.0QML — 5.0V Reference Diode

LM185-1.2-N — Micropower Voltage Reference Diode

LM185-1.2QML — Micropower Voltage Reference Diode

LM185-1.2QML-SP — Radiation-hardened QMLV, 1.2-V shunt voltage reference

LM185-2.5-N — Micropower Voltage Reference Diode

LM185-2.5QML — Micropower Voltage Reference Diode

LM185-2.5QML-SP — Space-grade QMLV 2.5-V shunt voltage reference

LM185-ADJ — Adjustable Micropower Voltage Reference

LM185QML — Adjustable Micropower Voltage Reference

LM285-1.2 — 1.235-V, –40°C to +85°C, micropower voltage reference

LM285-1.2-N — 1.235-V, –40°C to +85°C, micropower voltage reference diode

LM285-2.5 — 2.5-V, –40°C to +85°C, micropower voltage reference

LM285-2.5-N — 2.5-V, –40°C to +85°C, micropower voltage reference diode

LM285-ADJ — Adjustable, 85°C, micropower voltage reference

LM336-2.5 — 0°C to 70°C, 2.5-V integrated reference circuit

LM336-2.5-N — Voltage reference diode

LM336-5.0 — 5-V reference diode

LM385-1.2 — 1.235-V, 2%, 0°C to 70°C, micropower voltage reference

LM385-1.2-MIL — Micropower Voltage Reference

LM385-1.2-N — 1.235-V, 0°C to 70°C, micropower voltage reference diode

LM385-2.5 — 2.5-V, 2%, 70°C, micropower voltage reference

LM385-2.5-N — 2.5-V, 0°C to 70°C, micropower voltage reference diode

LM385-ADJ — Adjustable, 70°C, micropower voltage reference