MAX8727 Maxim, MAX8727 Datasheet - Page 3

• Manufacturer Part Number: MAX8727
• Description: TFT-LCD Step-Up DC-DC Converter
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
ELECTRICAL CHARACTERISTICS
(V
Input Voltage Range
Output Voltage Range
IN Undervoltage-Lockout
Threshold
IN Quiescent Current
IN Shutdown Current
ERROR AMPLIFIER
FB Regulation Voltage
FB Input Bias Current
FB Line Regulation
Transconductance
Shutdown FB Input Voltage
OSCILLATOR
Frequency
Maximum Duty Cycle
n-CHANNEL MOSFET
Current Limit
On-Resistance
Current-Sense Transresistance
SOFT-START
Reset Switch Resistance
Charge Current
CONTROL INPUTS
SHDN, FREQ Input Low Voltage
SHDN, FREQ Input High Voltage
SHDN, FREQ Input Hysteresis
FREQ Pulldown Current
SHDN Input Current
IN
IN
= V
= V
SHDN
SHDN
PARAMETER
PARAMETER
= 3V, FREQ = GND, T
= 3V, FREQ = GND, T
_______________________________________________________________________________________
A
A
V
18V < V
V
V
V
SHDN = GND
Level to produce V
V
Level to produce V
SHDN = GND
FREQ = GND
FREQ = IN
V
V
V
V
V
SHDN = GND
TFT-LCD Step-Up DC-DC Converter
OUT
IN
FB
FB
FB
FB
SS
= 0°C to +85°C. Typical values are at T
IN
IN
IN
= -40°C to +85°C, unless otherwise noted.) (Note 1)
rising, typical hysteresis is 50mV
= 2.6V to 5.5V
= 2.6V to 5.5V
= 2.6V to 5.5V
= 1.3V, not switching
= 1.0V, switching
= 1.24V
= 1V, 75% duty cycle
= 1.2V
< 18V
OUT
< 24V
COMP
COMP
CONDITIONS
CONDITIONS
= 1.24V
= 1.24V, V
IN
= 2.6V to 5.5V
A
= +25°C, unless otherwise noted.) (Note 1)
1.215
0.7 ×
MIN
2.20
0.05
0.11
MIN
100
490
900
V
2.6
4.0
3.0
2.5
2.3
86
IN
0.001
0.1 ×
TYP
TYP
V
6.0
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IN
1.260
MAX
0.3 ×
MAX
1600
2.57
0.44
0.15
0.15
0.31
250
300
770
250
100
V
5.5
5.5
5.1
7.5
9.5
24
10
94
5
1
IN
UNITS
UNITS
%/V
kHz
mΩ
mA
V/A
µA
nA
µS
µA
µA
µA
%
Ω
V
V
V
V
V
A
V
V
V
3