LMV431CM5 [NSC]
Low-Voltage (1.24V) Adjustable Precision Shunt Regulators; 低电压（ 1.24V ）可调式精密并联稳压器
| 型号： | LMV431CM5 |
| 厂家： | 
National Semiconductor |
| 描述： | Low-Voltage (1.24V) Adjustable Precision Shunt Regulators |
| 文件： | 总16页 (文件大小：552K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
August 2003
LMV431/LMV431A/LMV431B
Low-Voltage (1.24V) Adjustable Precision Shunt
Regulators
General Description
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)
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.
n Low Output Impedance (0.25Ω)
n Fast Turn-On Response
n Low Cost
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.
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
The LMV431, LMV431A and LMV431B provide performance
at a competitive price.
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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Symbol and Functional Diagrams
10095859
10095860
Simplified Schematic
10095803
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2
Ordering Information
Package
Temperature
Range
Voltage Tolerance
Part Number
Package Marking
NSC Drawing
1%
1.5%
0.5%
1%
LMV431AIZ
LMV431IZ
LMV431AIZ
LMV431IZ
LMV431BCZ
LMV431ACZ
LMV431CZ
N08A
Industrial Range
−40˚C to +85˚C
TO92
LMV431BCZ
LMV431ACZ
LMV431CZ
Z03A
Commerial Range
0˚C to +70˚C
1.5%
1%
LMV431AIM5
LMV431AIM5X
LMV431IM5
1%
N08A
Industrial Range
−40˚C to +85˚C
1.5%
1.5%
0.5%
0.5%
1%
N08B
LMV431IM5X
LMV431BCM5
LMV431BCM5X
LMV431ACM5
LMV431ACM5X
LMV431CM5
LMV431CM5X
LMV431BIMF
LMV431BIMFX
LMV431AIMF
LMV431AIMFX
N08B
N09C
SOT23-5
MF05A
N09C
N09A
Commercial Range
0˚C to +70˚C
1%
N09A
1.5%
1.5%
0.5%
0.5%
1%
N09B
N09B
RLB
RLA
Industrial Range
−40˚ to +85˚C
SOT23-3
MF03A
1%
DC/AC Test Circuits for Table and
Curves
10095805
Note:
V
= V
(1 + R1/R2) + IREF• R1
REF
Z
10095804
>
FIGURE 2. Test Circuit for VZ VREF
FIGURE 1. Test Circuit for VZ = VREF
10095806
FIGURE 3. Test Circuit for Off-State Current
3
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Absolute Maximum Ratings (Note 1)
Cathode Current
0.1 mA to 15mA
Temperature range
LMV431AI
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
−40˚C ≤ TA ≤ 85˚C
Thermal Resistance (θJA)(Note 3)
SOT23-5, -3 Package
TO-92 Package
Storage Temperature Range
Operating Temperature Range
Industrial (LMV431AI, LMV431I)
Commercial (LMV431AC,
LMV431C, LMV431BC)
Lead Temperature
−65˚C to +150˚C
455 ˚C/W
161 ˚C/W
−40˚C to +85˚C
0˚C to +70˚C
Derating Curve (Slope = −1/θJA
)
TO92 Package/SOT23 -5,-3 Package
(Soldering, 10 sec.)
265˚C
0.78W
Internal Power Dissipation (Note 2)
TO92
SOT23-5, -3 Package
0.28W
35V
Cathode Voltage
Continuous Cathode Current
Reference Input Current range
−30 mA to +30mA
−.05mA to 3mA
10095830
Operating Conditions
Cathode Voltage
VREF to 30V
LMV431C Electrical Characteristics
TA = 25˚C unless otherwise specified
Symbol
Parameter
Reference Voltage
Conditions
Min
1.222
1.21
Typ
Max Units
VREF
VZ = VREF, IZ = 10mA
TA = 25˚C
1.24
1.258
(See Figure 1 )
TA = Full Range
1.27
12
V
VDEV
Deviation of Reference Input Voltage
Over Temperature (Note 4)
Ratio of the Change in Reference
Voltage to the Change in Cathode
Voltage
VZ = VREF, IZ = 10mA,
4
mV
TA = Full Range (See Figure 1)
IZ = 10mA (see Figure 2 )
VZ from VREF to 6V
−1.5
−2.7 mV/V
∞
and 2.6k
R1 = 10k, R2
R1 = 10kΩ, R2
II = 10mA (see Figure 2)
=
∞
IREF
Reference Input Current
=
0.15
0.5
µA
∝
∞
,
IREF
Deviation of Reference Input Current
over Temperature
R1 = 10kΩ, R2
=
0.05
55
0.3
80
µA
II = 10mA, TA = Full Range (see Figure 2)
IZ(MIN)
Minimum Cathode Current for
Regulation
VZ = VREF (see Figure 1)
µA
µA
Ω
IZ(OFF)
rZ
Off-State Current
VZ=6V, VREF = 0V (see Figure 3 )
VZ = VREF, IZ = 0.1mA to 15mA
Frequency = 0Hz (see Figure 1)
0.001
0.25
0.1
0.4
Dynamic Output Impedance (Note 5)
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4
LMV431I Electrical Characteristics
TA = 25˚C unless otherwise specified
Symbol
Parameter
Reference Voltage
Conditions
Min
Typ
Max Units
VREF
VZ = VREF, IZ = 10mA
TA = 25˚C
1.222
1.202
1.24
1.258
V
(See Figure 1 )
TA = Full Range
1.278
VDEV
Deviation of Reference Input Voltage
Over Temperature (Note 4)
Ratio of the Change in Reference
Voltage to the Change in Cathode
Voltage
VZ = VREF, IZ = 10mA,
6
20
mV
TA = Full Range (See Figure 1)
IZ = 10mA (see Figure 2 )
VZ from VREF to 6V
−1.5
−2.7 mV/V
∞
and 2.6k
R1 = 10k, R2
R1 = 10kΩ, R2
II = 10mA (see Figure 2)
=
∞
IREF
Reference Input Current
=
0.15
0.1
0.5
µA
∝
∞
,
IREF
Deviation of Reference Input Current
over Temperature
R1 = 10kΩ, R2
=
0.4
µA
II = 10mA, TA = Full Range (see Figure 2)
IZ(MIN)
Minimum Cathode Current for
Regulation
VZ = VREF (see Figure 1)
55
80
µA
µA
IZ(OFF)
rZ
Off-State Current
VZ = 6V, VREF = 0V (see Figure 3 )
VZ = VREF, IZ = 0.1mA to 15mA
Frequency = 0Hz (see Figure 1)
0.001
0.1
Dynamic Output Impedance (Note 5)
0.25
0.4
Ω
LMV431AC Electrical Characteristics
TA = 25˚C unless otherwise specified
Symbol
Parameter
Reference Voltage
Conditions
Min
Typ
Max Units
VREF
VZ = VREF, IZ = 10 mA
TA = 25˚C
1.228
1.221
1.24
1.252
V
(See Figure 1 )
TA = Full Range
1.259
VDEV
Deviation of Reference Input Voltage
Over Temperature (Note 4)
Ratio of the Change in Reference
Voltage to the Change in Cathode
Voltage
VZ = VREF, IZ = 10mA,
4
12
mV
TA = Full Range (See Figure 1)
IZ = 10 mA (see Figure 2 )
VZ from VREF to 6V
−1.5
−2.7 mV/V
∞
and 2.6k
R1 = 10k, R2
R1 = 1 kΩ, R2
II = 10 mA (see Figure 2)
=
∞
IREF
Reference Input Current
=
0.15
0.05
0.50
µA
∝
∞
,
IREF
Deviation of Reference Input Current
over Temperature
R1 = 10 kΩ, R2
=
0.3
µA
II = 10 mA, TA = Full Range (see Figure 2)
IZ(MIN)
Minimum Cathode Current for
Regulation
VZ = VREF (see Figure 1)
55
80
µA
µA
IZ(OFF)
rZ
Off-State Current
VZ = 6V, VREF = 0V (see Figure 3 )
VZ = VREF, IZ = 0.1mA to 15mA
Frequency = 0 Hz (see Figure 1)
0.001
0.1
Dynamic Output Impedance (Note 5)
0.25
0.4
Ω
5
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LMV431AI Electrical Characteristics
TA = 25˚C unless otherwise specified
Symbol
Parameter
Reference Voltage
Conditions
Min
Typ
Max Units
VREF
VZ = VREF, IZ = 10mA
TA = 25˚C
1.228
1.215
1.24
1.252
(See Figure 1 )
TA = Full Range
1.265
20
V
VDEV
Deviation of Reference Input Voltage
Over Temperature (Note 4)
Ratio of the Change in Reference
Voltage to the Change in Cathode
Voltage
VZ = VREF, IZ = 10mA,
6
mV
TA = Full Range (See Figure 1)
IZ = 10mA (see Figure 2 )
VZ from VREF to 6V
−1.5
−2.7 mV/V
∞
and 2.6k
R1 = 10k, R2
R1 = 10kΩ, R2
II = 10mA (see Figure 2)
=
∞
IREF
Reference Input Current
=
0.15
0.1
0.5
µA
∝
∞
,
IREF
Deviation of Reference Input Current
over Temperature
R1 = 10kΩ, R2
=
0.4
µA
II = 10mA, TA = Full Range (see Figure 2)
IZ(MIN)
Minimum Cathode Current for
Regulation
VZ = VREF (see Figure 1)
55
80
µA
µA
IZ(OFF)
rZ
Off-State Current
VZ = 6V, VREF = 0V (see Figure 3 )
VZ = VREF, IZ = 0.1mA to 15mA
Frequency = 0Hz (see Figure 1)
0.001
0.1
Dynamic Output Impedance (Note 5)
0.25
0.4
Ω
LMV431BC Electrical Characteristics
TA = 25˚C unless otherwise specified
Symbol
Parameter
Reference Voltage
Conditions
Min
Typ
Max Units
VREF
VZ = VREF, IZ = 10mA
TA = 25˚C
1.234
1.227
1.24
1.246
(See Figure 1 )
TA = Full Range
1.253
12
V
VDEV
Deviation of Reference Input Voltage
Over Temperature (Note 4)
Ratio of the Change in Reference
Voltage to the Change in Cathode
Voltage
VZ = VREF, IZ = 10mA,
4
mV
TA = Full Range (See Figure 1)
IZ = 10mA (see Figure 2 )
VZ from VREF to 6V
−1.5
−2.7 mV/V
∞
and 2.6k
R1 = 10k, R2
R1 = 10kΩ, R2
II = 10mA (see Figure 2)
=
∞
IREF
Reference Input Current
=
0.15
0.05
0.50
µA
∝
∞
,
IREF
Deviation of Reference Input Current
over Temperature
R1 = 10kΩ, R2
=
0.3
µA
II = 10mA, TA = Full Range (see Figure 2)
IZ(MIN)
Minimum Cathode Current for
Regulation
VZ = VREF (see Figure 1)
55
80
µA
µA
IZ(OFF)
rZ
Off-State Current
VZ = 6V, VREF = 0V (see Figure 3 )
VZ = VREF, IZ = 0.1mA to 15mA
Frequency = 0Hz (see Figure 1)
0.001
0.1
Dynamic Output Impedance (Note 5)
0.25
0.4
Ω
LMV431BI Electrical Characteristics
TA = 25˚C unless otherwise specified
Symbol
Parameter
Reference Voltage
Conditions
Min
Typ
Max Units
VREF
VZ = VREF, IZ = 10mA
TA = 25˚C
1.234
1.224
1.24
1.246
(See Figure 1 )
TA = Full Range
1.259
20
V
VDEV
Deviation of Reference Input Voltage
Over Temperature (Note 4)
Ratio of the Change in Reference
Voltage to the Change in Cathode
Voltage
VZ = VREF, IZ = 10mA,
6
mV
TA = Full Range (See Figure 1)
IZ = 10mA (see Figure 2 )
VZ from VREF to 6V
−1.5
−2.7 mV/V
∞
and 2.6k
R1 = 10k, R2
=
∞
IREF
Reference Input Current
R1 = 10kΩ, R2
=
0.15
0.50
µA
II = 10mA (see Figure 2)
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6
LMV431BI Electrical Characteristics (Continued)
TA = 25˚C unless otherwise specified
Symbol
Parameter
Deviation of Reference Input Current
over Temperature
Conditions
Min
Typ
Max Units
∝
∞
,
IREF
R1 = 10kΩ, R2
=
0.1
0.4
µA
II = 10mA, TA = Full Range (see Figure 2)
IZ(MIN)
Minimum Cathode Current for
Regulation
VZ = VREF (see Figure 1)
55
80
µA
µA
IZ(OFF)
rZ
Off-State Current
VZ = 6V, VREF = 0V (see Figure 3 )
VZ = VREF, IZ = 0.1mA to 15mA
Frequency = 0Hz (see Figure 1)
0.001
0.1
Dynamic Output Impedance (Note 5)
0.25
0.4
Ω
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
beyond its rated operating conditions.
Note 2: Ratings apply to ambient temperature at 25˚C. Above this temperature, derate the TO92 at 6.2 mW/˚C, and the SOT23-5 at 2.2 mW/˚C. See derating curve
in Operating Condition section..
Note 3: T
= 150˚C, T = T + (θ
P ), where P is the operating power of the device.
JA D D
J Max
J
A
Note 4: Deviation of reference input voltage, V
, is defined as the maximum variation of the reference input voltage over the full temperature range.
DEV
See following:
7
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LMV431BI Electrical Characteristics (Continued)
10095807
∝
The average temperature coefficient of the reference input voltage,
V
, is defined as:
REF
Where:
− T = full temperature change.
T
2
1
∝
V
can be positive or negative depending on whether the slope is positive or negative.
REF
Example: V
= 6.0mV,
= 1240mV, T − T = 125˚C.
REF 2 1
DEV
Note 5: The dynamic output impedance, r , is defined as:
Z
When the device is programmed with two external resistors, R1 and R2, (see Figure 2 ), the dynamic output impedance of the overall circuit, r , is defined as:
Z
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8
Typical Performance Characteristics
Reference Voltage vs. Junction Temperature
Reference Input Current vs. Junction Temperature
10095850
10095862
Cathode Current vs. Cathode Voltage 1
Cathode Current vs. Cathode Voltage 2
10095851
10095852
Off-State Cathode Current vs.
Junction Temperature
Delta Reference Voltage Per
Delta Cathode Voltage vs. Junction Temperature
10095863
10095861
9
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Typical Performance Characteristics (Continued)
Input Voltage Noise vs. Frequency
10095853
10095845
Test Circuit for Input Voltage Noise vs. Frequency
Low Frequency Peak to Peak Noise
10095854
10095864
Test Circuit for Peak to Peak Noise (BW= 0.1Hz to 10Hz)
Small Signal Voltage Gain and Phase Shift vs.
Frequency
10095846
Test Circuit For Voltage Gain and Phase Shift vs.
Frequency
10095855
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10
Typical Performance Characteristics (Continued)
Reference Impedance vs. Frequency
10095847
Test Circuit for Reference Impedance vs. Frequency
10095856
10095857
10095858
Pulse Response 1
10095848
Test Circuit for Pulse Response 1
Pulse Response 2
10095849
Test Circuit for Pulse Response 2
11
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Typical Performance Characteristics (Continued)
LMV431 Stability Boundary Condition
10095868
10095869
10095870
Test circuit for VZ = VREF
Test Circuit for VZ = 2V, 3V
Percentage Change in VREF vs. Operating Life at 55˚C
10095866
Extrapolated from life-test data taken at 125˚C; the activation energy assumed is 0.7eV.
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12
Typical Applications
Series Regulator
Output Control of a Three Terminal Fixed Regulator
10095817
10095816
Higher Current Shunt Regulator
Crow Bar
10095818
10095819
Over Voltage/Under VoltageProtection Circuit
Voltage Monitor
10095820
10095821
13
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Typical Applications (Continued)
Delay Timer
Current Limiter or Current Source
10095823
10095822
Constant Current Sink
10095824
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14
Physical Dimensions inches (millimeters) unless otherwise noted
SOT23-5 Molded Small Outline Transistor Package (M5)
NS Package Number MF05A
SOT23-3 Molded Small Outline Transistor Package (M3)
NS Package Number MF03A
15
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
TO-92 Plastic Package
NS Package Number Z03A
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NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
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Americas Customer
Support Center
National Semiconductor
Europe Customer Support Center
Fax: +49 (0) 180-530 85 86
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Support Center
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Fax: 81-3-5639-7507
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National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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