MAX1620EEE datasheet(2/20 Pages) MAXIM

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Digitally Adjustable LCD Bias Supplies

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD = 3.3V, VBATT = 10V, TA = 0°C to +85°C, unless otherwise noted.)

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.

VDD to AGND ..............................................................-0.3V to 6V

PGND to AGND ..................................................................±0.3V

BATT, LX, LCDON to AGND ....................................-0.3V to 30V

DHI, DLO to PGND.....................................-0.3V to (VDD + 0.3V)

DOUT, FB, POL, POK, REF to AGND.........-0.3V to (VDD + 0.3V)

UP, DN, SHDN to AGND.............................................-0.3V to 6V

SCL, SDA, SUS to AGND............................................-0.3V to 6V

IDHI......................................................................................60mA

IDLO....................................................................................-30mA

ILCDON ...............................................................................-10mA

Continuous Power Dissipation (TA = +70°C)

QSOP (derate 8.3mW/°C above +70°C) ......................667mW

Operating Temperature Range

MAX1620EEE/MAX1621EEE ............................-40°C to +85°C

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

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

V LCDON = 28V, POK = 0.967V

V LCDON = 0.4V, POK = 1.017V

FB = -50mV

FB = REF + 100mV

POL = AGND, 3.0V

≤ VDD ≤ 5.5V

Shutdown mode, V SHDN = VDD,VDD = 5.5V

POL = VDD, 3.0V ≤ VDD ≤ 5.5V

Operating mode, output in regulation, VDD = 5.5V

VDD = 5V

VDD = 3.0V

LX = 12V, shutdown mode

VDD = 4.5V

LX = 12V, operating mode

BATT = 12V, shutdown mode

≤ BATT ≤ 12V, TA = 0°C to +85°C

BATT = 12V, operating mode

1.8V

≤ BATT ≤ 20V, TA = +25°C

µA

LCDON High, Leakage Current

-2

-6

LCDON Low, Sinking Current

-10

-20

FB Input Current (Note 3)

-8

1.46

1.5

1.53

FB Regulation Voltage

-25

DLO Output Current (Note 3)

DHI Output Current (Note 3)

Ω

On-Resistance (DLO, DHI)

16.5

23.5

µs-V

Microsecond-Volt Time Constant (k-factor)

Positive Output Voltage

920

µA

150

250

VDD Supply Current

1.8

BATT Operating Range (Note 2)

µA

LX Input Current

µA

BATT Input Current

-27

Negative Output Voltage

1.5

2.8

Undervoltage Lockout Threshold (Note 1)

3.0

5.5

VDD Operating Range

Voltage on POK rising

0.967

0.992

1.017

POK Threshold Voltage

POK Hysteresis

CONDITIONS

UNITS

MIN

TYP

MAX

PARAMETER

No load

1.47

1.5

1.53

REF Voltage

0µA

≤ IREF ≤ 25mA

310

REF Load Regulation

SWITCHING REGULATOR

REFERENCE AND DAC OUTPUT

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