Datasheet
MAX17062
TFT-LCD Step-Up DC-DC Converter
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= V
SHDN
= 3V, FREQ = 3V, T
A
= 0°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
LX to AGND ............................................................-0.3V to +22V
IN, SHDN, FREQ, FB to AGND..............................-0.3V to +7.5V
COMP, SS to AGND ....................................-0.3V to (V
IN
+ 0.3V)
PGND to AGND .....................................................-0.3V to +0.3V
LX Switch Maximum Continuous RMS Current .....................3.2A
Continuous Power Dissipation (T
A
= +70°C)
10-Pin TDFN (derate 24.4mW/°C above +70°C) ..........1951mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OUT
< 18V 2.6 5.5
Input Voltage Range
18V < V
OUT
< 20V 4.0 5.5
V
Output Voltage Range 20 V
IN Undervoltage-Lockout
Threshold
V
IN
rising, typical hysteresis is 50mV 2.30 2.45 2.57 V
V
FB
= 1.3V, not switching 0.3 0.6
IN Quiescent Current
V
FB
= 1.0V, switching 1.5 2.5
mA
SHDN = AGND, T
A
= +25°C 0.01 10.0
IN Shutdown Current
SHDN = AGND, T
A
= +85°C 0.01
μA
Temperature rising 160
Thermal Shutdown
Hysteresis 20
°C
ERROR AMPLIFIER
FB Regulation Voltage Level to produce V
COMP
= 1.24V 1.23 1.24 1.25 V
FB Input Bias Current V
FB
= 1.24V 75 150 225 nA
FB Line Regulation Level to produce V
COMP
= 1.24V, V
IN
= 2.6V to 5.5V 0.01 0.15 %/V
Transconductance 110 250 450 μS
Voltage Gain 2400 V/V
Shutdown FB Input Voltage SHDN = AGND 0.05 0.10 0.15 V
OSCILLATOR
FREQ = AGND 500 640 780
Frequency
FREQ = IN 1000 1200 1400
kHz
Maximum Duty Cycle 88 91 94 %
n-CHANNEL MOSFET
Current Limit V
FB
= 1V, 75% duty cycle, IN = 5V 3.9 4.6 5.3 A
IN = 5V 100 170
On-Resistance
IN = 3V 125 210
m
Leakage Current V
LX
= 20V 11 20 μA
Current-Sense Transresistance IN = 5V 0.09 0.15 0.25 V/A
SOFT-START
Reset Switch Resistance 100
Charge Current V
SS
= 1.2V 2 4 6 μA