MAX1889 データシートの表示（PDF） - Maxim Integrated

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MAX1889

Triple-Output TFT LCD Power Supply with Fault Protection

Maxim Integrated 

Triple-Output TFT LCD Power Supply

with Fault Protection

ABSOLUTE MAXIMUM RATINGS

IN, SHDN, OCN, OCP,

FB, FBP, FBN, FREQ to GND ...............................-0.3V to +6V

PGND to GND.....................................................................±0.3V

LX to PGND ............................................................-0.3V to +14V

DRVP to GND .........................................................-0.3V to +30V

REF, GATE, TGND to GND ..........................-0.3V to (VIN + 0.3V)

DRVN to GND .....................................(VIN - 28V) to (VIN + 0.3V)

Continuous Power Dissipation (TA = +70°C)

16-Pin QFN (derate 19.2mW/°C above +70°C) .........1538mW

Operating Temperature Range

MAX1889EGE ..................................................-40°C to +85°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VIN = 3V, SHDN = IN, CREF = 0.22µF, PGND = GND, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.)

PARAMETER

IN Supply Range

IN Undervoltage Lockout

(UVLO) Threshold

IN Quiescent Current

IN Shutdown Current

REF Output Voltage

Thermal Shutdown

MAIN STEP-UP REGULATOR

Main Output Voltage Range

Operating Frequency

Oscillator Maximum Duty Cycle

FB Regulation Voltage

FB Fault Trip Level

Load Regulation

Line Regulation

FB Input Bias Current

LX Switch On-Resistance

LX Leakage Current

LX Current Limit

LX RMS Current Rating

Soft-Start Period

SYMBOL

VIN

VUVLO

IIN

VREF

CONDITIONS

350mV typical

hysteresis

VIN rising

VIN falling

VFB = VFBP = 1.5V, VFBN = 0V (Note 1)

V SHDN = 0, VIN = 5V

-2µA < IREF < 50µA

VMAIN

fOSC

VFREQ = VIN

VFREQ = 0V

VFB

IFB

RLX(ON)

ILX

ILIM

ILX = 200mA, slope = 0 (Note 2)

VFB falling

IMAIN = 0 to full load

VIN = 2.7V to 5.5V

VFB = 1.5V

VLX = 13V

Not tested

tSS

MIN

2.7

2.55

2.2

1.231

TYP

2.7

2.35

0.1

1.250

160

MAX

5.5

2.85

2.5

1.0

1.0

1.269

UNITS

V

V

mA

µA

V

°C

VIN

0.85

80

1.229

0.95

-100

1.6

1

500

85

1.242

1.0

-1.6

0.2

250

0.01

2.1

4096 /

fOSC

13

1.15

90

1.254

1.05

+100

450

20

2.8

1.4

V

MHz

kHz

%

V

V

%

%/V

nA

mΩ

µA

A

A

s

Soft-Start Step Size

POSITIVE LINEAR-REGULATOR CONTROLLER

FBP Regulation Voltage

VFBP IDRVP = 0.2mA

FBP Fault Trip Level

VFBP falling

FBP Input Bias Current

IFBP

VFBP = 1.25V

FBP Effective Transconductance

VDRVP = 10V, IDRVP = 0.1mA to 2mA

VREF /32

V

1.213 1.25 1.288

V

0.96

1.0

1.04

V

-50

+50

nA

75

mS

2 _______________________________________________________________________________________

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