Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - voltage reference Shunt Adjustable TO 92 3

REF CATHODE

ANODE

LMV431, LMV431A, LMV431B

www.ti.com

SNVS041F –MAY 2004–REVISED MAY 2005

LMV431/LMV431A/LMV431B Low-Voltage (1.24V) Adjustable Precision Shunt Regulators

Check for Samples: LMV431, LMV431A, LMV431B

FEATURES

DESCRIPTION

The LMV431, LMV431A and LMV431B are precision

• Low Voltage Operation/Wide Adjust Range

1.24V shunt regulators capable of adjustment to 30V.

(1.24V/30V)

Negative feedback from the cathode to the adjust pin

• 0.5% Initial Tolerance (LMV431B)

controls the cathode voltage, much like a non-

• Temperature Compensated for Industrial

inverting op amp configuration (Refer to Symbol and

Functional diagrams). A two resistor voltage divider

Temperature Range (39 PPM/°C for the

terminated at the adjust pin controls the gain of a

LMV431AI)

1.24V band-gap reference. Shorting the cathode to

• Low Operation Current (55µA)

the adjust pin (voltage follower) provides a cathode

• Low Output Impedance (0.25Ω)

voltage of a 1.24V.

• Fast Turn-On Response

The LMV431, LMV431A and LMV431B have

• Low Cost

respective initial tolerances of 1.5%, 1% and 0.5%,

and functionally lends themselves to several

applications that require zener diode type

APPLICATIONS

performance at low voltages. Applications include a

• Shunt Regulator

3V to 2.7V low drop-out regulator, an error amplifier

• Series Regulator

in a 3V off-line switching regulator and even as a

voltage detector. These parts are typically stable with

• Current Source or Sink

capacitive loads greater than 10nF and less than

• Voltage Monitor

50pF.

• Error Amplifier

The LMV431, LMV431A and LMV431B provide

• 3V Off-Line Switching Regulator

performance at a competitive price.

• Low Dropout N-Channel Series Regulator

Connection Diagram

*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.

Figure 1. TO-92: Plastic Package Figure 2. SOT-23-5

Top View Top View

Figure 3. SOT-23-3

Top View

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (27 pages)

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LMV431, LMV431A, LMV431B www.ti.com SNVS041F – MAY 2004 – REVISED MAY 2005 LMV431/LMV431A/LMV431B Low-Voltage (1.24V) Adjustable Precision Shunt Regulators Check for Samples: LMV431, LMV431A, LMV431B FEATURES 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 noninverting op amp configuration (Refer to Symbol and Functional diagrams).
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LMV431, LMV431A, LMV431B SNVS041F – MAY 2004 – REVISED MAY 2005 www.ti.com Symbol and Functional Diagrams Simplified Schematic DC/AC Test Circuits for Table and Curves Note: Figure 4. Test Circuit for VZ = VREF 2 Submit Documentation Feedback VZ = VREF (1 + R1/R2) + IREF• R1 Figure 5.
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LMV431, LMV431A, LMV431B www.ti.com SNVS041F – MAY 2004 – REVISED MAY 2005 Figure 6. Test Circuit for Off-State Current These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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LMV431, LMV431A, LMV431B SNVS041F – MAY 2004 – REVISED MAY 2005 www.ti.com LMV431C ELECTRICAL CHARACTERISTICS TA = 25°C unless otherwise specified Symbol VREF Parameter Conditions Reference Voltage VZ = VREF, IZ = 10mA (See Figure 4 ) Min Typ Max TA = 25°C 1.222 1.24 1.258 TA = Full Range 1.21 1.27 V 4 12 mV −1.5 −2.7 mV/ V 0.5 μA 0.3 μA 55 80 µA 0.001 0.1 μA 0.
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LMV431, LMV431A, LMV431B www.ti.com SNVS041F – MAY 2004 – REVISED MAY 2005 LMV431I ELECTRICAL CHARACTERISTICS TA = 25°C unless otherwise specified Symbol VREF Parameter Conditions Reference Voltage VZ = VREF, IZ = 10mA (See Figure 4 ) Min Typ Max TA = 25°C 1.222 1.24 1.258 TA = Full Range 1.202 1.
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LMV431, LMV431A, LMV431B SNVS041F – MAY 2004 – REVISED MAY 2005 www.ti.com LMV431AC ELECTRICAL CHARACTERISTICS TA = 25°C unless otherwise specified Symbol VREF Parameter Conditions Reference Voltage VZ = VREF, IZ = 10 mA (See Figure 4 ) Min Typ Max TA = 25°C 1.228 1.24 1.252 TA = Full Range 1.221 1.
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LMV431, LMV431A, LMV431B www.ti.com SNVS041F – MAY 2004 – REVISED MAY 2005 LMV431AI ELECTRICAL CHARACTERISTICS TA = 25°C unless otherwise specified Symbol VREF Parameter Conditions Reference Voltage VZ = VREF, IZ = 10mA (See Figure 4 ) Min Typ Max TA = 25°C 1.228 1.24 1.252 TA = Full Range 1.215 1.265 V 6 20 mV −1.5 −2.
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LMV431, LMV431A, LMV431B SNVS041F – MAY 2004 – REVISED MAY 2005 www.ti.com LMV431BC ELECTRICAL CHARACTERISTICS TA = 25°C unless otherwise specified Symbol VREF Parameter Conditions Reference Voltage VZ = VREF, IZ = 10mA (See Figure 4 ) Min Typ Max TA = 25°C 1.234 1.24 1.246 TA = Full Range 1.227 1.253 V 4 12 mV −1.5 −2.
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LMV431, LMV431A, LMV431B www.ti.com SNVS041F – MAY 2004 – REVISED MAY 2005 LMV431BI ELECTRICAL CHARACTERISTICS TA = 25°C unless otherwise specified Symbol VREF Parameter Conditions Reference Voltage VZ = VREF, IZ = 10mA (See Figure 4 ) Min Typ Max TA = 25°C 1.234 1.24 1.246 TA = Full Range 1.224 1.259 V 6 20 mV −1.5 −2.
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LMV431, LMV431A, LMV431B SNVS041F – MAY 2004 – REVISED MAY 2005 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS 10 Reference Voltage vs. Junction Temperature Reference Input Current vs. Junction Temperature Figure 7. Figure 8. Cathode Current vs. Cathode Voltage 1 Cathode Current vs. Cathode Voltage 2 Figure 9. Figure 10. Off-State Cathode Current vs. Junction Temperature Delta Reference Voltage Per Delta Cathode Voltage vs. Junction Temperature Figure 11. Figure 12.
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LMV431, LMV431A, LMV431B www.ti.com SNVS041F – MAY 2004 – REVISED MAY 2005 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Input Voltage Noise vs. Frequency Test Circuit for Input Voltage Noise vs. Frequency Figure 13. Figure 14. Low Frequency Peak to Peak Noise Test Circuit for Peak to Peak Noise (BW= 0.1Hz to 10Hz) Figure 15. Figure 16. Small Signal Voltage Gain and Phase Shift vs. Frequency Test Circuit For Voltage Gain and Phase Shift vs. Frequency Figure 17. Figure 18.
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LMV431, LMV431A, LMV431B SNVS041F – MAY 2004 – REVISED MAY 2005 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) 12 Reference Impedance vs. Frequency Test Circuit for Reference Impedance vs. Frequency Figure 19. Figure 20. Pulse Response 1 Test Circuit for Pulse Response 1 Figure 21. Figure 22. Pulse Response 2 Test Circuit for Pulse Response 2 Figure 23. Figure 24.
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LMV431, LMV431A, LMV431B www.ti.com SNVS041F – MAY 2004 – REVISED MAY 2005 TYPICAL PERFORMANCE CHARACTERISTICS (continued) LMV431 Stability Boundary Condition Test circuit for VZ = VREF 15 150: VZ CATHODE CURRENT IZ (mA) TA = 25°C IZ = 15mA 12 IZ STABLE STABLE VZ=2V UNSTABLE REGION 9 + CL 6 - VZ=3V VSUPPLY 3 FOR VZ = VREF, STABLE FOR CL = 1pF TO 10k nF 0 0.001 0.01 0.1 1 10 100 1k 10k LOAD CAPACITANCE CL (nF) Figure 25. Figure 26.
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LMV431, LMV431A, LMV431B SNVS041F – MAY 2004 – REVISED MAY 2005 www.ti.
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LMV431, LMV431A, LMV431B www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) LMV431ACM5 SOT-23 DBV 5 1000 178.0 8.4 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3.2 3.2 1.4 4.0 8.0 Q3 LMV431ACM5/NOPB SOT-23 DBV 5 1000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 LMV431ACM5X/NOPB SOT-23 DBV 5 3000 178.0 8.4 3.2 3.2 1.4 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) LMV431CM5X/NOPB SOT-23 DBV 5 3000 178.0 8.4 LMV431IM5 SOT-23 DBV 5 1000 178.0 8.4 LMV431IM5/NOPB SOT-23 DBV 5 1000 178.0 LMV431IM5X SOT-23 DBV 5 3000 178.0 LMV431IM5X/NOPB SOT-23 DBV 5 3000 178.0 W Pin1 (mm) Quadrant 3.2 3.2 1.4 4.0 8.0 Q3 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMV431BCM5X/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.0 LMV431BIMF SOT-23 DBZ 3 1000 210.0 185.0 35.0 LMV431BIMF/NOPB SOT-23 DBZ 3 1000 210.0 185.0 35.0 LMV431BIMFX/NOPB SOT-23 DBZ 3 3000 210.0 185.0 35.0 LMV431CM5 SOT-23 DBV 5 1000 210.0 185.0 35.0 LMV431CM5/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.
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