LM431

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SNVS020G – MAY 2000 – REVISED APRIL 2013

LM431 Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Reference Voltage

2.440

2.495

2.550

V

LM431A (Figure 4 )

2.470

2.495

2.520

V

LM431B (Figure 4 )

2.485

2.500

2.510

V

LM431C (Figure 4 )

Deviation of Reference Input Voltage Over

8.0

17

mV

Ratio of the Change in Reference Voltage

−1.4

−2.7

mV/V

to the Change in Cathode Voltage

(Figure 5 )

−1.0

−2.0

Reference Input Current

2.0

4.0

μA

(Figure 5 )

Deviation of Reference Input Current over

0.4

1.2

μA

Temperature

Minimum Cathode Current for Regulation

0.4

1.0

mA

Off-State Current

0.3

1.0

μA

0.75

Ω

Frequency = 0 Hz (Figure 4 )

0.50

Ω

Frequency = 0 Hz (Figure 4 )

(1)

range.

The average temperature coefficient of the reference input voltage,

Where:

(2)

When the device is programmed with two external resistors, R1 and R2, (see Figure 5 ), the dynamic output impedance of the overall

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