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MAX16929

Automotive TFT-LCD Power Supply with Boost

Converter and Gate Voltage Regulators

ELECTRICAL CHARACTERISTICS (continued)

(Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Soft-Start Ramp Time

3.9

ms

Maximum Duty Cycle

Continuous mode

80

%

Minimum Duty Cycle

Continuous mode

20

%

Maximum Duty Cycle in Dropout

Dropout

95

%

Thermal Shutdown Temperature

+175

N

C

Thermal Shutdown Hysteresis

15

N

C

POWER GOOD (PGOOD)

PGOOD Threshold

Rising

94

%

Falling

90

92

95

PGOOD Debounce Time

13

F

s

Output High-Leakage Current

0.2

F

A

Output Low Level

0.4

V

LOGIC LEVELS

ENB Threshold

ENB rising

1.4

1.8

2.2

V

ENB Hysteresis

0.2

V

ENB Input Current

3

5

9

F

A

BOOST, POSITIVE (GH), NEGATIVE (GL), 1.8V/3.3V CONVERTERS

INA Input Supply Range

3

5.5

V

INA Supply Current

LXP not switching

1.5

2.0

mA

INA Undervoltage Lockout

Threshold

2.5

2.7

2.9

V

INA Shutdown Current

0.5

F

A

Thermal Shutdown Temperature

Temperature rising

+165

N

C

Thermal Shutdown Hysteresis

15

N

C

Duration to Trigger Fault Condition

old

238

ms

Autoretry Time

1.9

s

REFERENCE (REF)

REF Output Voltage

No output current

1.236

1.25

1.264

V

REF Load Regulation

-2

+2

%

REF Undervoltage Lockout

Threshold

Rising edge, hysteresis = 200mV

1.165

V

OSCILLATOR

Internal Oscillator Frequency

3.96

4.40

4.84

MHz

Spread-Spectrum Modulation

Frequency

MHz