MAX8739 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8739 Datasheet PDF : 19 Pages
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MAX8739
TFT, LCD, DC-DC Converter with
Operational Amplifiers
Electrical Characteristics (continued)
(VIN = 2.5V, VSUP = 10V, VSRC = 28V, FREQ = CTL = IN, PGND = AGND = 0, TA = 0°C to +85°C. Typical values are at TA = +25°C,
unless otherwise noted.)
PARAMETER
CTL Input-High Voltage
CTL Input-Leakage Current
CTL-to-SRC Propagation Delay
SRC Input-Voltage Range
SRC Input Current
DRN Input Current
SRC-to-COM Switch On-
Resistance
DRN-to-COM Switch On-
Resistance
CONDITIONS
VIN = 1.8V to 2.4V
VIN = 2.4V to 5.5V
CTL = AGND or IN
COM falling, no load on COM
COM rising, no load on COM
VDRN = 8V, CTL = AGND, VDEL = 1.5V
VDRN = 8V, CTL = IN, VDEL = 1.5V
VDRN = 8V, CTL = AGND, VDEL = 1.5V
VDEL = 1.5V, CTL = IN
VDEL = 1.5V, CTL = AGND
MIN TYP MAX UNITS
1.4
V
2.0
-1
+1
µA
100
ns
100
28
V
15
30
µA
100 180
90
150
µA
15
30
Ω
30
60
Ω
Electrical Characteristics
(VIN = 2.5V, VSUP = 10V, VSRC = 28V, FREQ = CTL = IN, PGND = AGND = 0, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
IN Supply Range
CONDITIONS
MIN TYP MAX UNITS
1.8
5.5
V
IN Quiescent Current
IN Undervoltage Lockout
Threshold
VIN = 2.5V, VFB = 1.5V
IN rising, 200mV hysteresis
30
µA
1.75
V
LDO Output Voltage
LDO Undervoltage Lockout
Threshold
6V ≤ VSUP ≤ 13V, ILDO = 12.5mA
LDO rising, 200mV hysteresis
4.6
5.4
V
2.4
3.0
V
LDO Output Current
15
mA
SUP Supply Voltage Range
4.5
13.0
V
SUP Undervoltage Fault
Threshold
1.4
V
SUP Supply Current
VPOS_ = 4V, no load
LX not switching
LX switching
3.0
mA
30
STEP-UP REGULATOR
Operating Frequency
FREQ = AGND
FREQ = IN
512
1020
768
kHz
1380
Maximum Duty Cycle
FREQ = AGND
FREQ = IN
91
99
%
88
96
FREQ Input Low Voltage
VIN = 1.8V to 5.5V
0.6
V
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