Datasheet

Multi-Output Power Supplies with VCOM Amplifier
and High-Voltage Gamma Reference for LCD TVs
MAX17126/MAX17126A
6 ______________________________________________________________________________________
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
SEQUENCE CONTROL
EN Pulldown Resistance 1
MI
DLY1 Charge Current
V
DLY1
= 1V; when DLY1 cap is not used, there is no
delay
6 8 10
FA
EN, DLY1 Turn-On Threshold 1.19 1.25 1.31 V
DLY1 Discharge Switch
On-Resistance
EN = GND or fault tripped 10
I
FBN Discharge Switch
On-Resistance
(EN = GND and INVL < UVLO) or fault tripped 3
kI
GAMMA REFERENCE
VREF_I Input-Voltage Range 10 18.0 V
VREF_I Input Bias Current No load 125 250
FA
VREF_O Dropout Voltage I
VREF_O
= 60mA 0.25 0.5 V
VREF_FB Regulation Voltage
V
VREF_I
= 13.5V, 1mA P I
VREF_O
P 30mA, V
VREF_O
= 9.5V
1.243 1.250 1.256 V
V
VREF_I
from 10V to 18V, I
VREF_O
= 20mA, V
VREF_O
= 9.5V
P 0.9
mV/V
VREF_O Maximum Output
Current
60 mA
PGOOD FUNCTION
VDET Threshold VDET rising 1.274 1.3 1.326 V
VDET Hysteresis 50 mV
VDET Input Bias Current 50 175 300 nA
PGOOD Output Voltage VDET = AGND, I
PGOOD
= 1mA 0.4 V
FAULT DETECTION
Duration-to-Trigger Fault For UVP only 50 ms
Step-Up Short-Circuit Protection FB1 falling edge
0.36 x
V
REF
0.4 x
V
REF
0.44 x
V
REF
V
Step-Down Short-Circuit
Protection
Adjustable mode FB2 falling
0.18 x
V
REF
0.2 x
V
REF
0.22 x
V
REF
V
Fixed mode OUT falling, internal feedback divider
voltage
0.18 x
V
REF
0.2 x
V
REF
0.22 x
V
REF
Positive Charge-Pump
Short-Circuit Protection
FBP falling edge
0.36 x
V
REF
0.4 x
V
REF
0.44 x
V
REF
V
Negative Charge-Pump
Short-Circuit Protection
V
REF
- V
FBN
0.4 0.45 0.5 V
Thermal-Shutdown Threshold Latch protection +160
NC