MAX1881 Просмотр технического описания (PDF) - Maxim Integrated

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MAX1881

Quad-Output TFT LCD DC-DC Converters with Buffer

Maxim Integrated 

Quad-Output TFT LCD DC-DC

Converters with Buffer

ELECTRICAL CHARACTERISTICS (continued)

(VIN = +3.0V, SHDN = IN, VSUPP = VSUPN = VSUPB = VSUPL = 10V, LDOOUT = FBL, BUF- = BUFOUT, BUF+ = FLTSET = TGND =

PGND = GND, CREF = 0.22µF, CBUF = 1µF, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

NEGATIVE CHARGE PUMP (MAX1778/MAX1880/MAX1881/MAX1882 ONLY)

SUPN Input Supply Range

VSUPN

Operating Frequency

fCHP

FBN Regulation Voltage

VFBN

FBN Input Bias Current

IFBN

VFBN = 0

DRVN PCH On-Resistance

RPCH(ON)

DRVN NCH On-Resistance

RNCH(ON) VFBN = +50mV

VFBN = -50mV

Maximum RMS DRVN Current

FBN Power-Ready Trip Level

Falling edge

FBN Fault Trip Level

Rising edge

LOW-DROPOUT LINEAR REGULATOR (MAX1778/MAX1881/MAX1883/MAX1884 ONLY)

SUPL Input Supply Range

SUPL Undervoltage Lockout

VSUPL

Rising edge, 50mV hysteresis (typ)

SUPL Quiescent Current

Dropout Voltage (Note 1)

ISUPL

VDROP

ILDO = 100µA

LDO is set to

regulate at 9V

ILDO = 40mA

ILDO = 5mA

FBL Regulation Voltage

VFBL

VSUPL = 10V, LDO regulating at 9V,

ILDO = 15mA

LDO Load Regulation

VSUPL = 10V, LDO regulating at 9V,

ILDO = 100µA to 40mA

LDO Line Regulation

VSUPL = 4.5V to 15V, FBL = LDOOUT,

ILDO = 15mA

FBL Input Bias Current

LDO Current Limit

VCOM BUFFER

SUPB Input Supply Range

SUPB Quiescent Current

BUFOUT Leakage Current

IFBL

ILDOLIM

VFBL = 1.25V

VSUPL = 10V, VLDOOUT = 9V, VFBL = 1.2V

VSUPB

ISUPB

VSUPB = 13V

Power-Supply Rejection Ratio

PSRR VSUPB = 4.5V to 13V, VCM = 2.25V

Input Common-Mode Voltage

Range

VCM

|VOS| < 10mV

Common-Mode Rejection Ratio

Input Bias Current

Input Offset Current

Gain Bandwidth Product

CMRR

IBIAS

IOS

GBW

VCM = 1.2V to 8.8V

VCM = 5V

VCM = 5V

CBUF = 1µF

MIN TYP MAX UNITS

2.7

13

V

0.5 x fOSC

Hz

-50

0

+50

mV

-50

+50

nA

5

10

Ω

2

4

Ω

20

kΩ

0.1

A

80

125

165

mV

80

140

190

mV

4.5

15

V

3.8

4

4.3

V

120

220

µA

130

300

mV

70

1.235 1.25 1.265

V

1.2

%

0.02 %/V

-0.8

+0.8

µA

40

130

220

mA

4.5

13

V

420

850

µA

-10

+10

µA

85

98

dB

V

1.2

8.8

75

dB

-100

-10 +100

nA

-100

+100

nA

13

kHz

4 _______________________________________________________________________________________

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