LM431SB 查看數據表（PDF） - Fairchild Semiconductor

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LM431SB

Programmable Shunt Regulator

Fairchild Semiconductor 

LM431SA/LM431SB/LM431SC

Electrical Characteristics

(TA = +25°C, unless otherwise specified)

Parameter

Reference

Input Voltage

Deviation of

Reference

Input Voltage

Over-

Temperature

Ratio of

Change in

Reference

Input Voltage

to the Change

in Cathode

Voltage

Reference

Input Current

Deviation of

Reference

Input Current

Over Full

Temperature

Range

Minimum

Cathode

Current for

Regulation

Off -Stage

Cathode

Current

Dynamic

Impedance

Symbol

Conditions

VREF VKA=VREF, IKA=10mA

LM431SA

LM431SB

LM431SC

Unit

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

2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508 V

∆VREF/ VKA=VREF, IKA=10mA

∆T

TMIN≤TA≤TMAX

- 4.5 17

- 4.5 17 - 4.5 17 mV

∆VREF/ IKA

∆VKA =10mA

∆VKA=10V-

VREF

∆VKA=36V-

10V

IREF

IKA=10mA,

R1=10KΩ,R2=∞

IKA=10mA,

∆IREF/∆T

R1=10KΩ,R2=∞

TA =Full Range

- -1.0 -2.7 - -1.0 -2.7 - -1.0 -2.7

mV/V

- -0.5 -2.0 - -0.5 -2.0 - -0.5 -2.0

- 1.5 4

- 1.5 4

- 1.5 4 µA

-

0.4 1.2

-

0.4 1.2 -

0.4 1.2 µA

IKA(MIN) VKA=VREF

- 0.45 1.0 - 0.45 1.0 - 0.45 1.0 mA

IKA(OFF) VKA=36V, VREF=0

- 0.05 1.0

ZKA

VKA=VREF,

IKA=1 to 100mA ,f ≥1.0kHz

-

0.15 0.5

- 0.05 1.0

- 0.15 0.5

- 0.05 1.0 µA

- 0.15 0.5 Ω

Note1

TMIN = -25°C, TMAX = +85°C

3

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