A8603KESTR-R datasheet(8/42 Pages) ALLEGRO

8 / 42 page

Multiple-Output Regulator for

Automotive LCD Displays

A8603

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

OUTPUT CURRENT CAPACITY

AVDD OCP Trip Level

IAVDD(OCP)

Includes IVCOM

200

275

350

VCOM OCP Trip Level

IVCOM(OCP)

VGH OCP Trip Level

IVGH(OCP)

VGL OCP Trip Level

IVGL(OCP)

Current into VGL pin

OUTPUT VOLTAGE ACCURACY

AVDD, VGH, and VGL Load

Regulation

VAVDDreg

VVGHreg

VVGLreg

VAVDD =10 V, IAVDD = 10 to 100 mA

VVGH = 20 V, IVGH = 0.4 to 4 mA

VVGL = –8 V, IVGL = –0.8 to –8 mA

•

–0.1

–

0.1

AVDD Accuracy

ErrAVDD

Reg00 = 0x40 (VAVDD = 10.04 V), IAVDD = 50 mA •

–2.1

–

2.1

VCOM Accuracy

ErrVCOM

Reg01,02 = 0x100 (VVCOM = 5.005 V),

IVCOM = 10 mA

•

–2.1

–

2.1

VGH Accuracy

errVGH

Reg04 = 0x40 (VVGH = 20.65 V), IVGH = 2 mA

•

–2.5

–

2.5

VGL Accuracy

errVGL

Reg03 = 0x20 (VVGL = –8.39 V), IVGL = –4 mA

•

–2.5

–

2.5

VCOM Step Size

VCOM Load Regulation[2]

VVCOMreg

ILOAD = 2 to 20 mA, VVCOM = 5.0 V

•

–5

–

VCOM Temperature Coefficient[2]

TCVCOM

VVCOM = 5 V, –30°C < TA < 85°C,

ILOAD = 10 mA

•

–100

–

150

μV/°C

Minimum Dropout for VCOM from

AVDD

VVCOM(DO)

VAVDD = 7 V, IVCOM = 20 mA

–

1.5

FAULT PIN

FAULT Pull-Down Voltage

VFAULT(PD)

Fault condition asserted, pull-up current = 1 mA

–

0.4

FAULT Pin Leakage Current

VFAULT(LKG) Fault condition cleared, pull-up to 5 V

–

µA

PROGRAMMABLE DELAYS AND TIMERS

Startup Timeout/Watchdog Timer

(Time limit for all outputs to reach

90% target, starting from internal

EN=H)

tSU_TO_min

Minimum timeout when Reg0x9 = 0x03 or lower

–

9.6

–

tSU_TO_max Maximum timeout when Reg0x9 = 0x1F

–

99.2

–

Startup Delay Timer#1-4

(One each for AVDD/VCOM/VGL/

VGH)

tSU_DLY_min Minimum delay when Reg_X = 0x00, X = 5..8 [3]

–

tSU_DLY_max Maximum delay when Reg_X = 0xFF, X = 5..8 [3]

–

25.5

–

Shutdown Timeout

(starting from internal EN = L)

tSD_TO

All outputs discharged to below 10% target

(30% for VGL and VGH)

Shutdown Delay Timer#5-8

(One each for AVDD/VCOM/VGL/

VGH)

tSD_DLY_min

Minimum delay when Reg_X = 0x00,

X = C,D,E,F [3]

–

tSD_DLY_max

Maximum delay when Reg_X = 0xFF,

X = C,D,E,F [3]

–

25.5

–

Overcurrent Protection (OCP)

Timeout

tOCP_TO

Maximum time for any output to stay in OCP

fault condition before shutdown.

Fault Retry Counter

NRESTART

Maximum number of fault retries.

Programmable through Reg0x0A

–

Fault Cool-Down Timer

tRESTART_min

Cooldown time between fault shutdown and

next retry. Reg0x0B = 0x03 or lower

–

9.6

–

tRESTART_max

Cooldown time between fault shutdown and

next retry. Reg0x0B = 0x3F

–

201.6

–

ELECTRICAL CHARACTERISTICS [1] (continued): Valid at VIN = 5 V, EN = high, fSW = 2 MHz, VAVDD = 10 V, VVGH1 = 20 V, VVGL = –8 V,

TJ = TA = 25°C, except • indicates specifications guaranteed for TJ = TA = −40°C to 125°C, unless otherwise specified

Continued on the next page…

A8603KESTR-R 数据表(PDF) 8 Page - Allegro MicroSystems

A8603KESTR-R 数据表(HTML) 8 Page - Allegro MicroSystems

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

数据表下载