Datasheet

Step-Up, Step-Down Regulator, Gate-On Charge Pump,
and Boost-Buck Regulator for TV TFT LCD Display
MAX17122
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
IN
= V
IN2
= V
IN3
= 12V, T
A
= 0°C to +85°C. Typical values are at T
A
= +25NC, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
POWER-GOOD BLOCKS
FB2 Power-Good Threshold FB2 rising 0.975 1.00 1.025 V
FB2 Threshold Hysteresis 12 mV
RESET Output Low Voltage I
RESET
= 1mA 0.4 V
RESET Leakage Current V
RESET
= 3V 1
FA
FBP Power-Good Threshold FBP rising 1.1 1.15 1.2 V
FBP Threshold Hysteresis 125 mV
GPGD Output Low Voltage I
GPGD
= 1mA 0.4 V
GPGD Leakage Current V
GPGD
= 3V 1
FA
GATE FUNCTION
GATE Pulldown Current
GATE charging current 0.15
mA
Gate done current 0.62
GATE Drive Voltage V
IN2
- V
GATE
, GATE enabled 5.0 5.35 5.65 V
GATE Pullup Resistance GATE off, to IN2 25
I
HVS BLOCK
HVS Input Low Voltage 0.6 V
HVS Input High Voltage 1.85 V
HVS Input Pulldown Resistance 1
MI
RHVS Output Resistance I
RHVS
= 4mA 25
I
SEQUENCE CONTROL
EN1, EN2, DLY1, DLY2, DEL
Charge Current
Measured at 1V 6 8.5 11
FA
EN1, EN2, DLY1, DLY2, DEL
Turn-On Threshold
1.25 1.30 V
EN1, EN2 Discharge Switch
On-Resistance
VL < UVLO or fault tripped 50
I
DLY1, DLY2, DLP Discharge
Switch On-Resistance
EN1 = low or fault tripped 10
I
FAULT DETECTION
Duration to Trigger Fault 50 ms
Duration to Restart After Fault 160 ms
Thermal-Shutdown Threshold
Typical hysteresis = 15NC
+160
NC