Datasheet

MAX17014
Low-Cost Multiple-Output
Power Supply for LCD TVs
_______________________________________________________________________________________ 7
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
IN
= V
IN2
= 12V, AV
DD
= V
OVIN
= V
SUP
= 15V, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C, unless
otherwise noted.) (Note 4)
PARAMETER CONDITIONS MIN TYP MAX UNITS
GENERAL
V
IN
, IN2 Input Voltage Range 8.0 16.5 V
FSEL = V
IN
1020 1380
SMPS Operating Frequency
FSEL = GND 510 690
kHz
V
IN
Undervoltage Lockout Threshold V
IN
rising edge, 100mV typical hysteresis 5.75 7.25 V
VL REGULATOR
VL Output Voltage
I
VL
= 25mA, V
FB1
= V
FB2
= V
FBP
= 1.1V,
V
FBN
= 0.4V (all regulators switching)
4.9 5.1 V
VL Undervoltage Lockout Threshold VL rising edge, 100mV typical hysteresis 3.5 4.3 V
REFERENCE
REF Output Voltage No external load 1.235 1.265 V
REF Load Regulation 0 < I
LOAD
< 50μA 10 mV
REF Undervoltage Lockout Threshold Rising edge; 20mV typical hysteresis 1.2 V
STEP-DOWN REGULATOR
OUT Voltage in Fixed Mode FB2 = GND, no load (Note 2) 3.25 3.35 V
FB2 Voltage in Adjustable Mode V
OUT
= 2.5V, no load (Note 2) 1.23 1.27 V
FB2 Adjustable-Mode
Threshold Voltage
Dual-mode comparator 0.10 0.20 V
Output Voltage Adjust Range Step-down output 1.5 5.0 V
LX2-to-IN2 nMOS Switch
On-Resistance
240 m
LX2-to-CPGND nMOS Switch
On-Resistance
6 23 
BST-to-VL pMOS Switch
On-Resistance
7 20 
LX2 Positive Current Limit 2.50 3.50 A
Maximum Duty Factor 70 90 %
STEP-UP REGULATOR
Output Voltage Range V
VIN
20 V
Oscillator Maximum Duty Cycle 69 81 %
FB1 Regulation Voltage FB1 = COMP, C
COMP
= 1nF 1.23 1.27 V
LX1 Current Limit V
FB1
= 1.1V, duty cycle = 25% 3.2 4.2 A
Current-Sense Transresistance 0.16 0.30 V/A
LX1 On-Resistance 220 m