AN1431T, AN1431M
Surface-mount Adjustable Output Shunt Regulator
■ Overview
The AN1431T and AN1431M are high accuracy stabilized power supplies in which the output voltage can be adjusted in the range from approx. 2.5 to 36V by using the external resistor under the operating temperature. Because of its fast rise characteristics, it can be replaced with Zener diode and has the wide application range.
■ Features
•High precision reference voltage : 2.5V±2%
•High-temperature stability : 17ppm/˚C typ.
•Output voltage externally adjustable : 2.5 to 36V
•Fast rise
•Low input impedance : 0.2Ω (typ.)
•Low output noise voltage
■ Pin Name
áAN1431Tñ
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Pin No. |
Pin name |
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1 |
Cathode |
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2 |
Reference pin |
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3 |
Anode |
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áAN1431Mñ |
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Pin No. |
Pin name |
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1 |
Reference pin |
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2 |
Anode |
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3 |
Cathode |
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■ Block Diagram
AN1431T |
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Unit : mm |
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5.0±0.2 |
4.0±0.2 |
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5.1±0.2 |
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13.5±0.5 |
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+ 0.2
0.45– 0.1
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2.54 |
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2.3±0.2 |
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2 |
3 |
1 |
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JEDEC : TO-92 |
(SSIP003-P-0000) |
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AN1431M |
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Unit : mm |
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5.0±0.2 |
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4.0±0.2 |
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5.1±0.2 |
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13.5±0.5 |
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+ 0.2 |
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0.45 – 0.1 |
2.54 |
2.3±0.2 |
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3 |
1 |
JEDEC : TO-92 (SSIP003-P-0000)
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Current |
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Source |
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Output Tr |
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Error |
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Amp. |
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– |
Voltage |
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Reference |
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1 |
IK 2 |
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1 |
2 |
IREF |
V1 |
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R1 |
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VKA |
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R2 |
VREF |
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VKA = VREF (1 + R1 ) + IREF · R1
R2
R2 = 2.5kΩ
Pin number in |
is for the AN1431T. |
Pin number in |
is for the AN1431M. |
■ Absolute Maximum Ratings (Ta=25˚C)
Parameter |
Symbol |
Rating |
Unit |
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Supply voltage |
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VCC |
37 |
V |
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Supply current |
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ICC |
–100 to+150 |
mA |
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Power dissipation |
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PD |
650 * |
mW |
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Reference input current |
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IREF |
– 0.05 to+10 |
mA |
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Operating ambient |
AN1431T |
Vopr |
–20 to+85 |
˚C |
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temperature |
AN1431M |
–25 to+80 |
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Storage temperature |
AN1431T |
Tstg |
–55 to+150 |
˚C |
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AN1431M |
–55 to+125 |
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* For the AN1431M, SM to the printed board (glass epoxy of 20 ´ 20 ´ 1.7mm with copper film of 1cm2)
■ Recommended Operating Range (Ta=25˚C)
Parameter |
Symbol |
Range |
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Operating supply voltage range |
VKA |
VREF (2.5 to 36V) |
■ Electrical Characteristics (Ta=25˚C)
Parameter |
Symbol |
Condition |
min |
typ |
max |
Unit |
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Reference voltage |
VREF |
VKA=VREF, IK=10mA |
2.45 |
2.50 |
2.55 |
V |
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Reference voltage temperature deviation |
VREF (Jev) *1 *2 |
VKA=VREF, IK=10mA, |
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3 |
17 |
mV |
Ta=0 to+70˚C |
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Reference voltage fluctuation |
DVREF |
IK=10mA, DVKA=10V to VREF |
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–1.2 |
–2.7 |
mV/V |
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DVKA |
IK=10mA, DVKA=36 to 10V |
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–1 |
–2 |
mV/V |
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Reference input current |
IREF |
IK=10mA, R1=10kΩ , R2= ¥ |
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2 |
4 |
µA |
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Reference input current temperature deviation |
IREF (Jev) *2 |
IK=10mA, R1=10kΩ , R2= ¥, |
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0.4 |
1.2 |
µA |
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Ta=0 to+70˚C |
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Minimum cathode current |
Imin |
VKA=VREF |
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0.4 |
1.0 |
mA |
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Off-state cathode current |
IOFF |
VKA=36V, VREF=0V |
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0.1 |
1.0 |
µA |
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Dynamic impedance |
|ZKA| *3 |
VKA=VREF, IK=1 to 100mA, |
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0.2 |
0.5 |
Ω |
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f = 1kHz |
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