L9444 datasheet(3/5 Pages) STMICROELECTRONICS

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ELECTRICAL CHARACTERISTICS (– 40

°C ≤ TJ≤ 125 °C unless otherwise noted)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Regulation Voltage

Tj = –40

°C

for L9444VB

for L9448VB

for L9480VB

14.49

14.36

14.75

14.79

14.66

15.05

14.96

15.35

Tj =25

°C

14.10

14.40

14.70

Tj = 125

°C

for L9444VB

for L9448VB

for L9480VB

13.50

13.70

13.10

13.80

14.00

13.40

14.10

14.30

13.70

Temperature Coeff. of the

Regulation Voltage

for L9444VB

for L9448VB

for L9480VB

-6

-4

-10

mV/

°C

mV/

°C

mV/

°C

eCT

Error on Nominal Temperature

Coeff.

± 30

Load Regualtion

0.1 In <Ialt < 0.9 In

(note 1)

250

Vsu

Control Circuit Minimum Start

up Voltage

Measured at Supply Pin

Vsd

Shutdown Voltage (dump

protection threshold)

Vsat 1

Output Saturation Voltage

Ifield =4 Ap

1.2

Vsat 2

Start Up Saturation Voltage

Ifield = 200 mA

0.7

Quiescent Current

Field Off

Supply Current

Ifield =4 Ap

Ifs

Field Pin Sink Current

Field Off

Field Pin @ 16 V

5mA

V1 CLAMP

Low Energy Clamping Zener

Voltage

Iclamp = 50 mA

120

fsw

Switching Frequency

01 In <Ialt < 0.9 In

1000

Note1: measured on an alternator with the following characteristics: In =<90A; Ialt/Ifield >= 23

APPLICATION CIRCUIT

L9444VB - L9448VB - L9480VB

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