MAX16929 Datasheet, PDF (4/25 Pages) Maxim Integrated Products – Automotive TFT-LCD Power Supply with Boost Converter and Gate Voltage Regulators

MAX16929
Automotive TFT-LCD Power Supply with Boost
Converter and Gate Voltage Regulators
ELECTRICAL CHARACTERISTICS (continued)
(V_INB = 12V, V_INA = 5V, V_GND = V_PGNDP = 0V, T_A = T_J = -40NC to +105NC, typical values are at T_A = +25NC, unless otherwise noted.)
(Note 2)
PARAMETER
SYMBOL
CONDITIONS
Spread-Spectrum Factor
BOOST CONVERTER
SSR
As a percentage of switching frequency,
f_SW
Switching Frequency
f_SW
Maximum Duty Cycle
LXP Current Limit
Low boost current-
I_LIM
Duty cycle = 70%, ^{limit option}
C_COMPI = 220pF _{High boost current-}
limit option
LXP On-Resistance
LXP Leakage Current
Soft-Start Time
R_{DS_ON(LXP)} I_LXP = 200mA
I_{LK_LXP} V_LXP = 20V, T_A =+25NC
(Note 4)
Output Voltage Range
V_SH
FBP Regulation Voltage
V_FBP
PGOOD Threshold
FBP Load Regulation
V_{PG_FBP}
FBP Line Regulation
FBP Input Bias Current
FBP to COMPV Transconductance
POSITIVE-GATE VOLTAGE REGULATOR (GH)
V_INA = +3V to +5.5V, ^TA ^{= +25NC}
0 < I_LOAD < full load _{TA = -40NC to +105NC}
Measured at FBP
0 < I_LOAD < full load
V_INA = +3V to +5.5V
V_FBP = +1V, T_A = +25NC
DI = Q2.5FA at COMPV, T_A = +25NC
Output Voltage Range
CP Overvoltage Threshold
FBGH Regulation Voltage
PGOOD Threshold
FBGH Load Regulation
FBGH Line Regulation
FBGH Input Bias Current
GH Output Current
GH Current Limit
GH Soft-Start Time
V_GH
V_FBGH
V_{PG_FBGH}
I_GH
I_{LIM_GH}
With external charge pump, T_A = +25NC
(maximum V_CP = 29.5V)
T_A = +25NC (Note 6)
I_GH = 1mA
Measured at FBGH
I_GH = 0 to 20mA
V_CP = 12V to 20V at V_GH = 10V,
I_GH = 10mA
V_FBGH = 1V, T_A = +25NC
V_CP - V_GH = 2V
NEGATIVE-GATE VOLTAGE REGULATOR (GL)
Output Voltage Range
FBGL Regulation Voltage
V_DRVN
V_FBGL
I_DRVN = 100FA
MIN
1.98
82
0.625
1.25
V_INA
0.985
0.98
0.74
5
29.5
0.98
0.83
20
35
-24
0.212
TYP
Q4
2.20
0.78
1.56
110
8.5
30
1.0
1.0
0.85
-1
0.1
400
30.5
1.0
0.85
2
2
56
7.45
0.242
MAX
2.42
93.5
1.87
250
20
18
1.015
1.02
0.96
Q1
29
1.034
0.87
Q1
-2
0.271
UNITS
%
MHz
%
A
mI
FA
ms
V
V
V
%
%/V
FA
FS
V
V
V
V
%
%
FA
mA
mA
ms
V
V
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