PANASONIC AN1431M

Voltage Regulators
AN1431T, AN1431M
Variable output shunt regulator
■ Overview
AN1431T
Unit: mm
(1.0)
4.0±0.2
5.1±0.2
5.0±0.2
The AN1431T and AN1431M are highly accurate
stabilized power supplies in which the output voltage can
be adjusted in the range from approximately 2.5 to 36V
under the operating temperature by using the external resistor. Because of its fast rising characteristic, it can be used
as a Zener diode and has the wide application.
(1.0)
2.3±0.2
13.5±0.5
0.6±0.15
■ Features
• High precision reference voltage: 2.5V (allowance: ±2%)
• High temperature stability: 17ppm/°C typ.
• Output voltage externally adjustable: 2.5 to 36V
• Fast rising output
• Low input impedance: 0.2Ω typ.
• Low output noise voltage
0.43+0.1
–0.05
0.43+0.1
–0.05
2.54
2 3 1
SSIP003-P-0000
AN1431M
Unit: mm
1.6 max.
4.6 max.
+
Output Tr
R
VKA = VREF (1 + 1 ) + IREF · R1
R2
R2 = 2.5kΩ
Error
Amp.
−
1
(3)
IK
Voltage
Reference
3
(2)
2
(1)
R2
0.44 max.
3.0
3
2
1
HSIP003-P-0000B
VKA
R1
1.5
1.5
IREF
V1
0.58 max.
0.48 max.
0.8 min.
2.6 max.
2.6 typ.
Current
Source
4.25 max.
1.8 max.
■ Block Diagram (AN1431T)
VREF
Note) The number in ( ) shows the pin number for the AN1431M.
Note) The packages (SSIP003-P-0000 and HSIP003P-0000B) of this product will be changed to
lead-free type (SSIP003-P-0000S and HSIP003P-0000Q). See the new package dimensions
section later of this datasheet.
■ Pin Descriptions
• AN1431T
Pin No.
• AN1431M
Description
Description
Pin No.
1
Cathode
1
Reference pin
2
Reference pin
2
Anode
3
Anode
3
Cathode
Publication date: December 2001
SFF00001CEB
1
AN1431T, AN1431M
■ Absolute Maximum Ratings at Ta = 25°C
Symbol
Rating
Supply voltage
Parameter
VCC
37
Unit
Supply current
ICC
mW
mA
V
Power dissipation
PD
−100 to +150
650 *
Reference input current
IREF
− 0.05 to +10
Operating ambient temperature
Storage temperature
AN1431T
−20 to +85
Topr
AN1431M
AN1431T
°C
−25 to +80
−55 to +150
Tstg
AN1431M
mA
°C
−55 to +125
AN1431M is mounted on a standard board (glass epoxy: 20mm × 20mm × t1.7mm with Cu foil of 1cm2 or more).
*
g Range
g
■ RecommendedpOperating
at Ta = 25°C
Parameter
Supply voltage
Symbol
Range
VKA
VREF (2.5 to 36V)
■ Electrical Characteristics at Ta = 25°C
Parameter
Symbol
Reference voltage
VREF
Reference voltage change to temperature VREF(Jev) *1, 2
Reference voltage power supply characteristic
Reference input current
Reference input current change to temperature
Conditions
Min
VKA = VREF, IK = 10mA
VKA = VREF, IK = 10mA,
Ta = 0 to +70°C
2.45
Typ
Max
2.50
2.55
V
3
17
mV
∆VREF
IK = 10mA, ∆VKA = 10V to VREF
−1.2
−2.7
mV/V
∆VKA
IK = 10mA, ∆VKA = 36V to 10V
−1
−2
mV/V
IREF
IK = 10mA, R1 = 10kΩ, R2 = ∞
IK = 10mA, R1 = 10kΩ, R2 = ∞,
Ta = 0 to +70°C
2
4
µA
0.4
1.2
µA
IREF(dev) *2
Minimum cathode current
Imin
VKA = VREF
0.4
1.0
mA
Off-state cathode current
IOFF
VKA = 36V, VREF = 0V
VKA = VREF, IK = 1 to 100mA,
f ≤ 1kHz
0.1
1.0
µA
0.2
0.5
Ω
ZKA
Dynamic impedance
*1
VREF
VREF(dev) = VREF(max) − VREF(min)
VREF(max)
*3
IREF
IREF(max)
IREF(dev) = IREF(max) − IREF(min)
VREF(dev)
IREF(dev)
IREF(min)
VREF(min)
∆Ta
∆Ta
The temperature coefficient aVREF for the reference input voltage is equivalently given by the following expression.
VREF(dev)
†
aVREF = VREF
× 106 (ppm/°C) † VREF at Ta = 25°C
∆Ta
For example, assuming VREF(max) = 2500mV (Ta = 30°C), VREF(min) = 2497mV (Ta = 0°C), (VREF(dev) = 3mV) and
VREF = 2499mV (Ta = 25°C) ∆Ta = 70°C
3mV
then, aVREF = 2499mV × 106 = 17.1 (ppm/°C)
70°C
*2 These values are design reference values, not guaranteed ones.
∆VKA
∆IK
The total dynamic impedance at ∆VREF , ∆VKA , IREF and IREF(dev) is as follows.
∆V
R
Z =
= ZKA (1 + 1 )
∆I
R2
*3 The dynamic impedance is defined by the following expression. ZKA =
2
Unit
SFF00001CEB
AN1431T, AN1431M
■ Main Characteristics
PD  Ta
VREF  Ta
2700
600
500
(1)
400
(2)
300
200
IREF  Ta
4
VK = VREF
IK = 10mA
2650
Reference input current IREF (µA)
(1) AN1431T
Rth(j-a) = 190°C/W (max.)
900
(2) AN1431M
Mounted on a standard board
800
(glass epoxy: 20mm × 20mm × t1.7mm
with Cu foil of 1cm2 or more)
700
Reference voltage VREF (mV)
Power dissipation PD (mW)
1000
2600
2550
2500
2450
2400
100
0
0
20
40
60
2350
−50 −25
80 100 120 140 160
Ambient temperature Ta (°C)
0
25
50
75
IK = 10mA
R1 = 10kΩ
R2 = ∞
3
2
1
−40 −20
100 125
0
20
40
60
80
100
Ambient temperature Ta (°C)
Ambient temperature Ta (°C)
2. Constant current power supply
3. Constant current source
■ Application Circuit Examples
1. Shunt regulator
+V
+V
+V
VO
IO
K
R1
K
VREF
K
AN1431T/M
AN1431T/M
R2
A
VREF
AN1431T/M
VREF
RS
A
RS
A
R
VO = 1 + 1 VREF
R2
IO =
4. Current bootstrap
+V
VREF
RS
IO =
VREF
RS
IO
5. Adjustable output regulator combined with 3-pin regulator
VO
+V
VO
AN7805
R1
R1
K
K
CI
VREF
R2
AN1431T/M
AN1431T/M
CO
VREF
A
R2
A
R
VO = 1 + 1 VREF
R2
R
VO = VREF 1 + 1 , VO(min) = VREF + 5V
R2
SFF00001CEB
3
AN1431T, AN1431M
■ New Package Dimensions (Unit: mm)
• SSIP003-P-0000S (Lead-free package)
4.00±0.20
(1.00)
(1.00)
5.00±0.20
5.00±0.20
0.60±0.15
1
13.30±0.50
0.40±0.10
2.30±0.20
0.40+0.10
-0.05
3
1.27
1.27
• HSIP003-P-0000Q (Lead-free package)
1.00+0.10
-0.20
2.50±0.10
4.00+0.25
-0.20
4.50±0.10
1.55±0.20
1
0.40+0.10
-0.05
1.50
3
0.40+0.10
-0.05
0.50+0.10
-0.05
(0.75)
1.50±0.10
3.00
4
2.65±0.10
(0.40)
0.10
SFF00001CEB
0.15 M
0.42+0.10
-0.05
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semiconductors described in this book
(1) If any of the products or technical information described in this book is to be exported or provided to non-residents, the laws and
regulations of the exporting country, especially, those with regard to security export control, must be observed.
(2) The technical information described in this book is intended only to show the main characteristics and application circuit examples
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company. Therefore, no responsibility is assumed by our company as to the infringement upon any such right owned by any other
company which may arise as a result of the use of technical information described in this book.
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equipment, communications equipment, measuring instruments and household appliances).
Consult our sales staff in advance for information on the following applications:
– Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support
systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body.
– Any applications other than the standard applications intended.
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Standards in advance to make sure that the latest specifications satisfy your requirements.
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(operating power supply voltage and operating environment etc.). Especially, please be careful not to exceed the range of absolute
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defect which may arise later in your equipment.
Even when the products are used within the guaranteed values, take into the consideration of incidence of break down and failure
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