L431LM3B datasheet(2/11 Pages) ETC2

2 / 11 page

1.24V Low-Voltage Adjustable

Precision Shunt Regulator

NIKO-SEM

L431L

APR-25-2002

ABSOLUTE MAXIMUM RATINGS

PARAMETER

VALUE

Cathode-Anode Reverse Breakdown Voltage - VKA

20V

Anode-Cathode Forward Current - IAK

1 A

Operating Cathode Current - IKA

100 mA

Reference Input Current - IREF

1 mA

Storage Temperature Range - TSTG

-65 to +150 °C

Junction Temperature - TJ

150 °C

Lead Temperature (Soldering, 10 Seconds) - TL

300 °C

Continuous Power at 25 °C - PD

TO-92

SOIC-8

SOT-23

700 mW

650 mW

200 mW

RECOMMENDED CONDITIONS

TYPICAL THERMAL RESISTANCES

Parameter

Rating

Package

θJA

θJC

Typ. De-rating

Cathode Voltage (VKA)

VREF to 18V

TO-92

160 °C/W

80 °C/W

6.3 mW/°C

Cathode Current (IK)

10 mA

SOIC-8

175 °C/W

45 °C/W

5.7 mW/°C

SOT-23

575 °C/W 150 °C/W

1.7 mW/°C

ELECTRICAL SPECIFICATIONS

(Ambient temperature must be derated base on power dissipation and package thermal characteristics. The conditions are: VKA = VREF and

IK = 10 mA unless otherwise stated)

PARAMETER

TEST CONDITIONS

MIN TYP MAX UNITS

TEST

CIRCUIT

TA = 25 °C, L432 (0.5%) 1.234 1.240 1.246

Output Voltage - VREF

TA = 25 °C, L432 (1%)

1.228 1.240 1.252

Line Regulation -

∆VREF

VKA = VREF to 15V

Load Regulation -

∆VREF

IK = 1 to 100 mA

3.9

Temperature Deviation -

∆V

REF

0 < TJ < 105 °C

Reference Input Current - IREF

2.3

µA

Reference Input Current

Temperature Coefficient -

∆I

REF

0 < TJ < 105 °C

0.14

0.6

µA

Minimum Cathode Current

for Regulation - IK(MIN)

0.2

Off State Leakage - IK(MIN)

VREF = 0V, VKA = 15V

500

Dynamic impedance

VKA = Vref, f ≦ 1kHz

IK = 0.1 mA to 100 mA

0.25

0.4

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