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MAX1778

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

Output Voltage

Input Offset Voltage

Output Voltage Swing High

Output Voltage Swing Low

Peak Buffer Output Current

BUF+ Dual Mode™ Threshold

Voltage

REFERENCE

Reference Voltage

Reference Undervoltage

Threshold

LOGIC SIGNALS

SHDN Input Low Voltage

SHDN Input High Voltage

SHDN Input Current

FLTSET Input Voltage Range

FLTSET Threshold Voltage

FLTSET Input Current

RDY Output Low Voltage

RDY Output High Leakage

Thermal Shutdown

SYMBOL

VBUFOUT

BUF+ = GND

CONDITIONS

IBUFOUT = 0

IBUFOUT = ±5mA

IBUFOUT = ±45mA

VSUPB = 4.5V to 13V, IBUFOUT = ±5mA

VOS

VCM = 1.2V to

(VSUPB –1.2V)

IBUFOUT = ±45mA

VOH

VOL

IBUFOUT = -45mA, ∆VOS = 1V

IBUFOUT = +45mA, ∆VOS = 1V

Falling edge, 20mV hysteresis (typ)

VREF -2µA < IREF < 50µA

ISHDN

Rising edge, 25mV hysteresis (typ)

VFLTSET = 1V

ISINK = 2mA

V RDY = 13V

Rising temperature

MIN TYP MAX UNITS

4.99

5.01

4.97

5.03

V

4.93

5.07

-30

30

mV

-70

70

9

9.6

V

0.4

1

V

±150

mA

80

125 170

mV

1.231 1.25 1.269

V

0.9

1.05

1.2

V

0.9

V

2.1

V

0.01

1

µA

0.67 x

VREF

0.85 x

V

VREF

80

125

170

mV

0.1

50

nA

0.25 0.5

V

0.01

1

µA

160

°C

Dual Mode is a registered trademark of Maxim Integrated Products, Inc.

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