Datasheet
Multi-Output Power Supplies with VCOM Amplifier
and High-Voltage Gamma Reference for LCD TVs
MAX17126/MAX17126A
4 ______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
INVL
= V
IN2
=
12V, V
VOP
=
V
VREF_I
=
15V, T
A
= 0°C to +85°C. Typical values are at T
A
= +25NC, unless oth-
erwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
LX1 Current Limit
V
FB1
= 1.1V, R
CLIM
= unconnected 3.6 4.2 4.8
A
V
FB1
= 1.1V, with R
CLIM
at CLIM pin -20%
4.2 -
(68k/
R
CLIM
)
+20%
CLIM Voltage
R
CLIM
= 60.5kI
0.56 0.625 0.69 V
Current-Sense Transresistance 0.19 0.21 0.25 V/A
LX1 On-Resistance 100 185
mI
Soft-Start Period C
SS
< 200pF 16 ms
SS Charge Current V
SS
= 1.2V 4 5 6
FA
POSITIVE CHARGE-PUMP REGULATORS
GD_I Input Supply Range 8.0 20 V
GD_I Input Supply Current V
FBP
= 1.5V (not switching) 0.15 0.3 mA
GD_I Overvoltage Threshold GD_I rising, 250mV typical hysteresis (Note 2) 20.1 21 22 V
FBP Regulation Voltage 1.2375 1.25 1.2625 V
FBP Line Regulation Error V
SUP
= 11V to 16V, not in dropout 0.2 %/V
FBP Input Bias Current V
FBP
= 1.5V, T
A
= +25°C -50 +50 nA
DRVP p-Channel MOSFET
On-Resistance
1.5 3
I
DRVP n-Channel MOSFET
On-Resistance
1 2
I
FBP Fault Trip Level Falling edge 0.96 1.0 1.04 V
Positive Charge-Pump
Soft-Start Period
7-bit voltage ramp with filtering to prevent high peak
currents 500kHz frequency
4 ms
750kHz frequency 3 ms
NEGATIVE CHARGE-PUMP REGULATORS
FBN Regulation Voltage V
REF
- V
FBN
0.99 1.00 1.01 V
FBN Input Bias Current V
FBN
= 0mV, T
A
= +25°C -50 +50 nA
FBN Line Regulation Error V
IN2
= 11V to 16V, not in dropout 0.2 %/V
DRVN P
CH
On-Resistance 1.5 3
I
DRVN N
CH
On-Resistance 1 2
I
FBN Fault Trip Level Rising edge 720 800 880 mV
Negative Charge-Pump Soft-
Start Period
7-bit voltage ramp with filtering to prevent high peak
currents 500kHz frequency
3
ms
750kHz frequency 2
AVDD SWITCH GATE CONTROL
GD to GD_I Pullup Resistance EN = GND 25 50
I
GD Output Sink Current EN = VL 5 10 15
FA
GD Done Threshold EN = VL, V
GD_I
- V
GD
5 6 7 V
OPERATIONAL AMPLIFIERS
VOP Supply Range 8 20 V