Datasheet

MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
_______________________________________________________________________________________ 3
PARAMETER CONDITIONS MIN TYP MAX UNITS
REFERENCE
REF Output Voltage No external load 1.235 1.250 1.265 V
REF Load Regulation 0 < I
LOAD
< 50μA 10 mV
REF Sink Current In regulation 10 μA
REF Undervoltage Lockout Threshold Rising edge; 20mV typical hysteresis 1.0 1.2 V
STEP-DOWN REGULATOR
0°C < T
A
< +85°C 3.25 3.30 3.35
OUT Voltage in Fixed Mode
FB2 = GND, no load
(Note 2)
T
A
= +25°C 3.267 3.333
V
0°C < T
A
< +85°C 1.23 1.25 1.27
FB2 Voltage in Adjustable Mode
V
OUT
= 2.5V, no load
(Note 2)
T
A
= +25°C 1.2375 1.2625
V
FB2 Adjustable-Mode Threshold
Voltage
Dual-mode comparator 0.10 0.15 0.20 V
Output Voltage Adjust Range Step-down output 1.5 5.0 V
FB2 Fault Trip Level Falling edge 0.96 1.00 1.04 V
FB2 Input Leakage Current V
FB2
= 1.5V 50 125 200 nA
DC Load Regulation 0A < I
LOAD
< 2A 0.5 %
DC Line Regulation No load, 10.8V < V
IN2
< 13.2V 0.1 %/V
LX2-to-IN2 nMOS Switch
On-Resistance
120 240 m
LX2-to-CPGND nMOS Switch
On-Resistance
6 10 23 
BST-to-VL PMOS Switch
On-Resistance
7 12 20 
Low-Frequency Operation
OUT Threshold
Step-down only 0.8 V
FSEL = V
IN
217
Low-Frequency Operation
Switching Frequency
FSEL = GND 108
kHz
LX2 Positive Current Limit 2.50 3 3.50 A
Soft-Start Period 3 ms
Soft-Start Step Size
V
REF
/
128
V
Maximum Duty Factor 70 80 90 %
STEP-UP REGULATOR
Output Voltage Range V
VIN
20 V
Oscillator Maximum Duty Cycle 69 75 81 %
Minimum t
ON
70 ns
0°C < T
A
< +85°C 1.235 1.25 1.265
FB1 Regulation Voltage
FB1 = COMP,
C
COMP
= 1nF
T
A
= +25°C 1.2375 1.2625
V
FB1 Fault Trip Level Falling edge 0.96 1.00 1.04 V
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
IN
= V
IN2
= 12V, AV
DD
= V
OVIN
= V
SUP
= 15V, T
A
= 0°C to +85°C. Typical values are at T
A
= +25°C, unless oth-
erwise noted.)