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MAX16929

Automotive TFT-LCD Power Supply with Boost

Converter and Gate Voltage Regulators

ELECTRICAL CHARACTERISTICS (continued)

(Note 2)

Note 2: Specifications over temperature are guaranteed by design and not production tested.

Note 3: Operation in light-load conditions or at extreme duty cycles result in skipped cycles, resulting in lower operating frequency

and possibly limited output accuracy and load response.

Note 4: 50% of the soft-start voltage time is due to the soft-start ramp, and the other 50% is due to the settling of the output voltage.

Note 5: Guaranteed by design; not production tested.

Note 6: After the voltage at CP exceeds this overvoltage threshold, the entire circuit switches off and autoretry is started.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

PGOOD Threshold

Measured at FBGL

0.38

0.4

0.42

V

FBGL Input Bias Current

Q

1

F

A

DRVN Source Current

2

mA

DRVN Source Current Limit

2.5

4

mA

GL Soft-Start Time

7.45

ms

1.8V/3.3V REGULATOR CONTROLLER

Output Voltage

3.3V regulator option

3.18

3.3

3.38

V

1.8V regulator option

1.746

1.8

1.854

FB PGOOD Threshold

Measured at FB

(Notes 5, 7)

3.3V regulator option,

FB rising

2.4

2.57

2.7

V

1.8V regulator option

1.364

1.38

1.396

FB Input Bias Current

2.5

F

A

4.5

DR Drive Current

4.5

6

mA

INPUT SERIES SWITCH CONTROL

p-Channel FET GATE Sink Current

33

55

75

F

A

GATE Voltage Threshold

Measured at GATE; below this voltage, the

external p-channel FET is considered on

1.25

V

DIGITAL LOGIC

ENP, SEQ Input Pulldown Resistor

Value

500

kI

ENP, SEQ Input-Voltage Low

V

ENP, SEQ Input-Voltage High

V

PGOOD Leakage Current

Q

1

F

A

PGOOD Output-Voltage Low

0.4

V