Rainbow Electronics MAX17062 User Manual
Page 2
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