MAX8727 데이터 시트보기 (PDF) - Maxim Integrated
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MAX8727 Datasheet PDF : 13 Pages
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TFT-LCD Step-Up DC-DC Converter
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VSHDN = 3V, FREQ = GND, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
MIN TYP MAX
CONTROL INPUTS
SHDN, FREQ Input Low Voltage VIN = 2.6V to 5.5V
0.3 ×
VIN
SHDN, FREQ Input High Voltage VIN = 2.6V to 5.5V
0.7 ×
VIN
SHDN, FREQ Input Hysteresis
VIN = 2.6V to 5.5V
0.1 ×
VIN
FREQ Pulldown Current
SHDN Input Current
SHDN = GND
2.3
6.0
9.5
0.001
1
UNITS
V
V
V
µA
µA
ELECTRICAL CHARACTERISTICS
(VIN = VSHDN = 3V, FREQ = GND, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
Input Voltage Range
Output Voltage Range
VOUT < 18V
18V < VOUT < 24V
CONDITIONS
IN Undervoltage-Lockout
Threshold
VIN rising, typical hysteresis is 50mV
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
VFB = 1.3V, not switching
VFB = 1.0V, switching
SHDN = GND
Level to produce VCOMP = 1.24V
VFB = 1.24V
Level to produce VCOMP = 1.24V, VIN = 2.6V to 5.5V
SHDN = GND
FREQ = GND
FREQ = IN
VFB = 1V, 75% duty cycle
VSS = 1.2V
MIN TYP MAX UNITS
2.6
5.5
V
4.0
5.5
24
V
2.20
2.57
V
0.44
mA
5
10
µA
1.215
100
0.05
1.260
V
250
nA
0.15 %/V
300
µS
0.15
V
490
770
kHz
900
1600
86
94
%
3.0
5.1
A
250
mΩ
0.11
0.31
V/A
100
Ω
2.5
7.5
µA
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