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Details, datasheet, quote on part number:LMV431BIMF
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| Part: | LMV431BIMF |
| Category: | Power Management => Voltage References => Shunt |
| Description: | LMV431 - Low-voltage (1.24V) Adjustable Precision Shunt Regulators, Package: SOT-23, Pin Nb=3 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LMV431BIMF datasheet File size : 570 kB |
| Request For quote: | Find where to buy LMV431BIMF
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Datasheet text preview:
LMV431/LMV431A/LMV431B Low-Voltage (1.24V) Adjustable Precision Shunt Regulators
August 2003
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 configuration (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 cathode to the adjust pin (voltage follower) provides a cathode voltage of a 1.24V. The LMV431, LMV431A and LMV431B have respective initial tolerances of 1.5%, 1% and 0.5%, and 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 (0.25) n Fast Turn-On Response n Low Cost
Applications
n n n n n n n Shunt Regulator Series Regulator Current Source or Sink Voltage Monitor Error Amplifier 3V Off-Line Switching Regulator Low Dropout N-Channel Series Regulator
Connection Diagrams
TO92: Plastic Package SOT23-3
10095801
Top View
10095867
SOT23-5
Top View
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
© 2003 National Semiconductor Corporation
DS100958
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LMV431/LMV431A/LMV431B
Symbol and Functional Diagrams
10095859
10095860
Simplified Schematic
10095803
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LMV431/LMV431A/LMV431B
Ordering Information
Package Temperature Range Industrial Range -40°C to +85°C TO92 Commerial Range 0°C to +70°C Voltage Tolerance 1% 1.5% 0.5% 1% 1.5% 1% Industrial Range -40°C to +85°C 1% 1.5% 1.5% SOT23-5 Commercial Range 0°C to +70°C 0.5% 0.5% 1% 1% 1.5% 1.5% 0.5% SOT23-3 Industrial Range -40° to +85°C 0.5% 1% 1% Part Number LMV431AIZ LMV431IZ LMV431BCZ LMV431ACZ LMV431CZ LMV431AIM5 LMV431AIM5X LMV431IM5 LMV431IM5X LMV431BCM5 LMV431BCM5X LMV431ACM5 LMV431ACM5X LMV431CM5 LMV431CM5X LMV431BIMF LMV431BIMFX LMV431AIMF LMV431AIMFX Package Marking LMV431AIZ LMV431IZ LMV431BCZ LMV431ACZ LMV431CZ N08A N08A N08B N08B N09C N09C N09A N09A N09B N09B RLB MF03A RLA MF05A Z03A NSC Drawing
DC/AC Test Circuits for Table and Curves
10095805
Note: VZ = VREF (1 + R1/R2) + IREF · R1
10095804
FIGURE 2. Test Circuit for VZ > VREF
FIGURE 1. Test Circuit for VZ = VREF
10095806
FIGURE 3. Test Circuit for Off-State Current
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