LM431SB データシートの表示（PDF） - ON Semiconductor

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LM431SB

Programmable Shunt Regulator

ON Semiconductor 

LM431SA, LM431SB, LM431SC

ELECTRICAL CHARACTERISTICS (Continued) (Notes 7 and 8, Values are at TA = 25°C unless otherwise noted)

LM431SAI

LM431SBI

LM431SCI

Symbol

Parameter

Conditions

Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit

VREF

Reference Input

Voltage

VKA = VREF, IKA = 10 mA

2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508 V

Deviation of Refer-

VREF(dev) ence Input Voltage

Over−Temperature

VKA = VREF, IKA = 10 mA, TMIN ≤ TA ≤

TMAX

DVREF /

DVKA

Ratio of Change in

Reference Input Volt-

age to Change in

Cathode Voltage

IKA = 10 mA

DVKA = 10 V−VREF

DVKA = 36 V − 10 V

IREF

Reference Input

Current

IKA = 10 mA, R1 =10 KW, R2 = ∞

5 20

−1.0 −2.7

−0.5 −2.0

1.5 4.0

5 20

−1.0 −2.7

−0.5 −2.0

1.5 4.0

5 20 mV

−1.0 −2.7

mV/V

−0.5 −2.0

1.5 4.0 μA

IREF(dev)

Deviation of Refer-

ence Input Current IKA = 10 mA, R1 = 10 KW, R2 = ∞,

Over Full Temperature TMIN ≤ TA ≤ TMAX

Range

0.8 2.0

0.8 2.0

0.8 2.0 μA

IKA(MIN)

Minimum Cathode

Current for Regulation

VKA = VREF

0.45 1.00

0.45 1.00

0.45 1.00 mA

IKA(OFF)

Off −Stage Cathode

Current

VKA = 36 V, VREF = 0

0.05 1.00

0.05 1.00

0.05 1.00 μA

ZKA

Dynamic Impedance VKA = VREF, IKA = 1 to 100 mA,

f ≥ 1.0 kHz

0.15 0.50

0.15 0.50

0.15 0.50 W

7. LM431SAI, LM431SBI, LM431SCI: − TA(min) = −40_C, TA(max) = +85_C

All other pins: − TA(min) = −25_C, TA(max) = +85_C

8. The deviation parameters VREF(dev) and IREF(dev)are defined as the differences between the maximum and minimum values obtained over the

rated temperature range. The average full−range temperature coefficient of the reference input voltage, αVREF, is defined as:

ǒ Ǔ ǒ Ǔ |aVREF|

ppm

°C

+

VREF(dev)

VREF(at 25°C)

@ 106

TMAX * TMIN

where TMAX −TMIN is the rated operating free−air temperature range

of the device.

VREF(min)

aVREF can be positive or negative, depending on whether minimum

VREF or maximum VREF, respectively, occurs at the lower

temperature.

VREF(max)

TMAX -TMIN

VREF(dev)

Example:

VREF(dev) = 4.5 mV, VREF = 2500 mV at 25°C,

TMAX −TMIN = 125°C for LM431SAI.

ǒ Ǔ 4.5 mV

2500 mV

@ 106

|aVREF| + 125°C + 14.4 ppmń°C

Because minimum VREF occurs at the lower temperature, the

coefficient is positive.

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