LMV431BCZ/NOPB National Semiconductor, LMV431BCZ/NOPB Datasheet

IC REG PREC SHUNT ADJ TO92-3

LMV431BCZ/NOPB

Manufacturer Part Number
LMV431BCZ/NOPB
Description
IC REG PREC SHUNT ADJ TO92-3
Manufacturer
National Semiconductor
Datasheet

Specifications of LMV431BCZ/NOPB

Reference Type
Shunt, Adjustable
Voltage - Output
1.24 ~ 30 V
Tolerance
±0.5%
Temperature Coefficient
129ppm/°C
Number Of Channels
1
Current - Cathode
55µA
Current - Output
15mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
TO-92-3 (Standard Body), TO-226
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Input
-
Current - Quiescent
-
Other names
LMV431BCZ
© 2005 National Semiconductor Corporation
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%, 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.
Connection Diagrams
*
*
or connected to Anode pin.
Pin 1 is not internally connected.
Pin 2 is internally connected to Anode pin. Pin 2 should be either floating
TO92: Plastic Package
Top View
Top View
SOT23-5
10095844
DS100958
10095801
Features
n Low Voltage Operation/Wide Adjust Range (1.24V/30V)
n 0.5% Initial Tolerance (LMV431B)
n Temperature Compensated for Industrial Temperature
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
Range (39 PPM/˚C for the LMV431AI)
Top View
SOT23-3
10095867
www.national.com
May 2005

Related parts for LMV431BCZ/NOPB

LMV431BCZ/NOPB Summary of contents

Page 1

... 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 © 2005 National Semiconductor Corporation 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/˚ ...

Page 2

Symbol and Functional Diagrams 10095859 Simplified Schematic www.national.com 2 10095860 10095803 ...

Page 3

Ordering Information Package Temperature Range Industrial Range −40˚C to +85˚C TO92 Commerial Range 0˚C to +70˚C Industrial Range −40˚C to +85˚C SOT23-5 Commercial Range 0˚C to +70˚C Industrial Range SOT23-3 −40˚ to +85˚C DC/AC Test Circuits for Table and Curves ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Operating Temperature Range Industrial (LMV431AI, LMV431I) Commercial (LMV431AC, LMV431C, LMV431BC) Lead Temperature TO92 Package/SOT23 -5,-3 Package (Soldering, 10 sec.) ...

Page 5

LMV431I Electrical Characteristics T = 25˚C unless otherwise specified A Symbol Parameter V Reference Voltage REF V Deviation of Reference Input Voltage DEV Over Temperature (Note 4) Ratio of the Change in Reference Voltage to the Change in Cathode Voltage ...

Page 6

LMV431AI Electrical Characteristics T = 25˚C unless otherwise specified A Symbol Parameter V Reference Voltage REF V Deviation of Reference Input Voltage DEV Over Temperature (Note 4) Ratio of the Change in Reference Voltage to the Change in Cathode Voltage ...

Page 7

LMV431BI Electrical Characteristics T = 25˚C unless otherwise specified A Symbol Parameter ∝ I Deviation of Reference Input Current REF over Temperature I Minimum Cathode Current for Z(MIN) Regulation I Off-State Current Z(OFF) r Dynamic Output Impedance (Note 5) Z ...

Page 8

LMV431BI Electrical Characteristics The average temperature coefficient of the reference input voltage, ∝ V Where: T − full temperature change ∝ V can be positive or negative depending on whether the slope is positive or negative. ...

Page 9

Typical Performance Characteristics Reference Voltage vs. Junction Temperature Cathode Current vs. Cathode Voltage 1 Off-State Cathode Current vs. Junction Temperature Reference Input Current vs. Junction Temperature 10095850 Cathode Current vs. Cathode Voltage 2 10095851 Delta Reference Voltage Per Delta Cathode ...

Page 10

Typical Performance Characteristics Input Voltage Noise vs. Frequency Low Frequency Peak to Peak Noise Small Signal Voltage Gain and Phase Shift vs. Frequency www.national.com (Continued) 10095853 Test Circuit for Input Voltage Noise vs. Frequency 10095854 Test Circuit for Peak to ...

Page 11

Typical Performance Characteristics Reference Impedance vs. Frequency Pulse Response 1 Pulse Response 2 (Continued) Test Circuit for Reference Impedance vs. Frequency 10095856 Test Circuit for Pulse Response 1 10095857 Test Circuit for Pulse Response 2 10095858 11 10095847 10095848 10095849 ...

Page 12

Typical Performance Characteristics Test circuit for V Z Percentage Change in V Extrapolated from life-test data taken at 125˚C; the activation energy assumed is 0.7eV. www.national.com (Continued) LMV431 Stability Boundary Condition 10095869 = V REF vs. Operating Life at 55˚C ...

Page 13

Typical Applications Series Regulator Higher Current Shunt Regulator Over Voltage/Under VoltageProtection Circuit Output Control of a Three Terminal Fixed Regulator 10095816 10095818 10095820 13 10095817 Crow Bar 10095819 Voltage Monitor 10095821 www.national.com ...

Page 14

Typical Applications Delay Timer www.national.com (Continued) 10095822 Constant Current Sink 14 Current Limiter or Current Source 10095823 10095824 ...

Page 15

Physical Dimensions inches (millimeters) unless otherwise noted SOT23-5 Molded Small Outline Transistor Package (M5) SOT23-3 Molded Small Outline Transistor Package (M3) NS Package Number MF05A NS Package Number MF03A 15 www.national.com ...

Page 16

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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