Datasheet

MAX17113
Low-Cost, Multiple-Output
Power Supply for LCD TVs
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
VIN
= V
IN2
= 12V, T
A
= 0°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
STEP-UP REGULATOR
Output-Voltage Range V
VIN
18 V
Minimum t
ON
70 100 ns
T
A
= +25°C 1.2375 1.250 1.2625
FB1 Regulation Voltage
FB1 = COMP,
C
COMP
= 1mF
0°C < T
A
< +85°C 1.225 1.275
V
FB1 Fault Threshold FB rising, hysteresis = 12mV 0.96 1.0 1.06 V
FB1 UVLO Threshold 0.05 0.125 0.2 V
FB1 Load Regulation 0A < I
LOAD
< full 0.5 %
FB1 Line Regulation 10.8V < V
IN
< 13.2V 0.08 0.15 %/V
FB1 Input Bias Current V
FB1
= 1.25V 20 125 300 nA
FB1 Transconductance ΔI = ±2.5μA at COMP, FB1 = COMP 125 320 600 μS
FB1 Voltage Gain FB1 to COMP 1400 V/V
LX1 Leakage Current V
FB1
= 1.5V, V
LX1
= 20V 10 25 μA
LX1 Current Limit V
FB1
= 1.1V, duty cycle = 25% 2.8 3.3 3.8 A
Current-Sense Transresistance 0.1 0.2 0.30 V/A
LX1 On-Resistance 80 200 mΩ
Soft-Start Period 10 ms
Soft-Start Step Size
I
LIM
/
128
A
POSITIVE AND NEGATIVE CHARGE-PUMP REGULATORS
0°C < T
A
< +85°C 1.23 1.25 1.27
FBP Regulation Voltage
T
A
= +25°C 1.2375 1.2625
V
FBP Line-Regulation Error 11V < V
SUP
< 16V, not in dropout 0.01 0.2 %/V
FBP Input Bias Current V
FBP
= 1.5V, T
A
= +25°C -50 +50 nA
DRVP p-Channel MOSFET
On-Resistance
2.0 4.0 Ω
DRVP n-Channel MOSFET
On-Resistance
0.8 1.5 Ω
FBP Fault Trip Level Falling edge 0.96 1.02 1.08 V
P osi ti ve C har g e- P um p S oft- S tar t P er i od 3.3 ms
Positive Charge-Pump
Soft-Start Step Size
V
REF
/
128
V
0°C < T
A
< +85°C 0.985 1.000 1.015
FBN Regulation Voltage V
REF
– V
FBN
T
A
= +25°C 0.99 1.00 1.01
V
FBN Input Bias Current V
FBN
= 250mV, T
A
= +25°C -50 +50 nA
FBN Line Regulation Error 11V < V
SUP
< 16V, not in dropout 0.01 0.2 %/V
DRVN p-Channel On-Resistance 2.0 4.0 Ω
DRVN n-Channel On-Resistance 0.8 1.5 Ω
FBN Fault Trip Level Rising edge 450 500 550 mV