TPS65146 datasheet(3/30 Pages) TI

No. de pieza	TPS65146

Descripción Electrónicos	Compact LCD Bias IC with LDO, VCOM Buffer and Reset Function

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Fabricante Electrónico	TI [Texas Instruments]

Página de inicio	http://www.ti.com

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ELECTRICAL CHARACTERISTICS

TPS65146

www.ti.com ........................................................................................................................................................................................... SLVS869 – NOVEMBER 2008

VIN = VLVIN = 3.3 V, VS = VSUP = 9V, VLVOUT = 2.5 V, VGH = 20 V, TA = –40°C to 85°C, typical values are at TA = 25°C (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY

VIN

Input voltage range

2.5

6.0

V

IQIN

Operating quiescent current into VIN

Device not switching, VFB = 1.240 V + 3%

0.17

0.5

mA

IQLVIN

Operating quiescent current into LVIN

VADJ = 1.240 V, VLVOUT = open, no load

25

45

µA

IQVGH

Operating quiescent current into VGH

VFLK = GND

22

40

µA

IQSUP

Operating quiescent current into SUP

Device not switching, VFB = 1.240 V + 3%

1.8

mA

ISDVIN

Shutdown current into VIN

VIN = 1.8 V, VS = GND

20

33

µA

ISDVGH

Shutdown current into VGH

VIN = 1.8 V, VGH = 32 V

30

50

µA

ISDLVIN

Shutdown current into LVIN

VIN = 1.8 V, VLVOUT = open

0.1

2

µA

ISDSUP

Shutdown current into SUP

VIN = 1.8 V, VSUP = 16.5 V

3

5

µA

VIN falling

2.0

2.2

VUVLO

Under-voltage lockout threshold

V

VIN rising

2.3

TSD

Thermal shutdown

Temperature rising

150

°C

TSDHYS

Thermal shutdown hysteresis

14

°C

LOGIC SIGNALS FREQ, VFLK

ILEAK

Input leakage current

VFLK = 6.0 V, FREQ = GND

0.1

µA

VIH

Logic high input voltage

VIN = 2.5 V to 6 V

2

V

VIL

Logic low input voltage

VIN = 2.5 V to 6 V

0.5

V

BOOST CONVERTER

VS

Output voltage boost converter(1)

7

16.5

V

VOVP

Overvoltage protection

VS rising

16.9

18

19

V

VFB

Feedback regulation voltage

TA = -40°C to 85°C

1.226

1.240

1.254

V

TA = 25°C

1.230

1.240

1.250

IFB

Feedback input bias current

VFB = 1.240V

0.1

µA

gm

Transconductiance error amplifier gain

115

µA/V

VIN = VGS = 5 V, ISW = current limit

0.13

0.38

RDS(ON)

N-channel MOSFET on-resistance

Ω

VIN = VGS = 3.3 V, ISW = current limit

0.15

0.44

ILEAK_SW

SW leakage current

VIN = 1.8 V, VSW = 17 V

30

µA

ILIM

N-Channel MOSFET current limit

2.0

2.5

3.0

A

ISS

Softstart current

VSS = 1.240 V

4

µA

FREQ = high

0.9

1.2

1.5

MHz

fosc

Switching frequency

FREQ = low

470

625

780

kHZ

IFREQ

FREQ sink current

FREQ = 3.3 V

4

µA

Line regulation

VIN = 2.5 V to 6.0 V, IOUT = 10 mA

0.008

%/V

Load regulation

IOUT = 0 A to 500 mA, VIN = 3.3 V

0.15

%/A

LDO REGULATOR

VLVOUT

LDO output voltage range

1.240

4

V

VADJ

Feedback regulation voltage

ILVOUT = 2mA, VLVOUT = 1.240 V, TA = -40°C to

1.222

1.240

1.258

V

85°C

ILVOUT = 2mA, VLVOUT = 1.240 V, TA = 25°C

1.225

1.240

1.255

IADJ

Feedback input bias current

VADJ = 1.240 V

0.1

µA

ISC_LDO

Short circuit current limit

VIN = VLVIN = 6 V, LVOUT = GND, ADJ = GND

750

mA

ILVOUT = 350 mA, VLVIN = VLVOUT – 0.1V

280

410

mV

VDO

Dropout voltage

ILVOUT = 500 mA, VLVIN = VLVOUT – 0.1V

430

620

Line regulation

VLVIN = 2.7 V to 5.5 V, ILVOUT = 100 mA

0.005

%/V

Load regulation

ILVOUT = 1 mA to 300 mA

0.6

%/A

(1)

Maximum output voltage limited by the Overvoltage Protection and not the maximum power switch rating of the boost converter.

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