A8450KLB datasheet(3/15 Pages) ALLEGRO

Part #	A8450KLB

Description	Automotive Multioutput Voltage Regulator

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Manufacturer	ALLEGRO [Allegro MicroSystems]

Direct Link	http://www.allegromicro.com

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A8450KLB-DS, Rev. 1

Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

A8450

Automotive Multioutput Voltage Regulator

ELECTRICAL CHARACTERISTICS at TA = –40ºC to 135°C, VBB = 6 to 45 V, VENB = 5 V, unless otherwise noted

Continued on next page

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Supply Quiescent Current

IBB

Enabled mode: VENBAT or VENB = HIGH,

IOUT = 0 mA: VBB = 14 V

–

6

10

mA

Enabled mode: VENBAT or VENB = HIGH,

IOUT = 0 mA; VBB = 6 V

–10

15

mA

Disabled mode: VENBAT and VENB = LOW

–

10

µA

Regulated Output Voltage

VREG

ILOAD = 550 mA = ILOADV5D + ILOADV5A + ILOADV33

+ ILOADVADJ; VBB > 6.5 V

5.50

–

5.80

V

Dropout: 6 V ≤ VBB < 6.5 V

5.00

–

5.80

V

Buck Switch On-Resistance

RDSON

TJ = 25°C

–

415

500

mΩ

TJ = 135°C

–

650

750

mΩ

Buck Switch Current Limit

IDSLIM

1.0

1.2

1.8

A

dc-to-dc Fixed Off-Time

tOFF

VBB = 14 V

–

4.75

–

µs

Soft Start Time

tSS

VBB = 14 V

5

10

15

ms

Logic Inputs

ENBAT Logic Input Voltage

VENBAT

HIGH input level

2.7

–

45

V

LOW input level

–0.3

–

0.8

V

ENBAT Input Current

IENBAT

HIGH input level, VENBAT = 45 V

–

300

µA

HIGH input level, VENBAT = 14 V

–

70

µA

LOW input level, VENBAT = 0.8 V

–1

–

10

µA

ENB Logic Input Voltage

VENB

HIGH input level

2.7

–

6.5

V

LOW input level

–0.3

–

0.8

V

ENB Input Current

IENB

HIGH input level, VENB ≥ 2.7 V

–

50

µA

LOW input level, VENB ≤ 0.8 V

–1

–

10

µA

Linear Regulator Outputs*

V5D Output Voltage

VOUTV5D 1 mA ≤ ILOADV5D ≤ 200 mA

4.9

5.0

5.1

V

V5A Output Voltage

VOUTV5A 1 mA ≤ ILOADV5A ≤ 200 mA

4.9

5.0

5.1

V

V33 Output Voltage

VOUTV33

3.234 3.300 3.366

V

V5A to V5D Tracking

VTRACK

50 mA ≤ ILOADV5A, ILOADV5D ≤ 200mA;

VBB > 6.5 V

–25

–

25

mV

V5D Current Limit

IOUTV5DLIM

200

300

–

mA

V5A Current Limit

IOUTV5ALIM

200

300

–

mA

Base Drive Output Current

IBD

1 V ≤ VOUTVADJ, VOUTV33 ≤ 4 V

5.0

10.0

16.0

mA

Feedback Voltage

VFB

1.16

1.20

1.24

V

Feedback Input Bias Current

IFB

–400

–100

100

nA

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