MAX1800EHJ 查看數據表（PDF） - Maxim Integrated
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MAX1800EHJ Datasheet PDF : 24 Pages
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Digital Camera Step-Up
Power Supply
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VOUT = VPOUT = 3.3V, PGND = GND, VONM = 3.3V, VON1 = VON2 = VON3 = VONA = 0, TA = -40°C to +85°C,
unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
ANALOG GAIN BLOCK
AI Feedback Regulation Voltage
AI Input Common-Mode Range
AI Input Current
AI to AO Voltage Gain
AO Output Sink Current
AO Output Source Current
AO Output Low Voltage
SYMBOL
CONDITIONS
VAO = VOUT - 1.25V
VAI = 1.35V
VAI = 1V, VAO = 2V
VAI = 1.5V, VAO = 2V
VAI = 1V, ISINK = 25µA
AO Output High Voltage
VAI = 1.5V or VONA = 0, ISOURCE = 25µA
AI to AO -3dB Bandwidth
AUXILIARY DC/DC CONTROLLERS 1, 2, 3
INTERNAL CLOCK
OSC Clock Low Trip Level
Falling edge
OSC Clock High Trip Level
VDCON = 0.625V
VDCON = VOUT
Maximum Duty-Cycle
Adjustment Range
Maximum Duty Cycle
Default Maximum Duty Cycle
ERROR AMPLIFIER
VDCON_ = 0.625V
VDCON_ = 1.25V
FB_ Regulation Voltage
FB_ = COMP_
FB_ to COMP_
Transconductance
FB_ = COMP_, -5µA < ILOAD < +5µA
MIN TYP MAX UNITS
1.23 1.25 1.27
V
-0.1
1.3
V
100
nA
70
100 140
V/V
0.5
2.5
mA
0.5
2.5
mA
0.5
V
VPOUT
V
- 0.5
5
MHz
0.2
0.25
0.3
V
0.575 0.625 0.675
V
1.00 1.05 1.10
40
90
%
50
%
84
%
1.23 1.25 1.27
V
60
100 140
µS
FB_ to COMP_ Maximum
Voltage Gain
FB_ Input Leakage Current
DRIVERS (DL1, DL2, DL3)
DL_ Driver Resistance
DL_ Drive Current
SOFT-START
VFB_ = 1.35V
RON
Output high or low
Sourcing or sinking, VDL _ = VOUT/2
2000
V/V
100
nA
2
6
Ω
0.5
A
Soft-Start Interval
SHORT-CIRCUIT PROTECTION
1024
OSC
cycles
Fault Interval
1024
OSC
cycles
Note 1: Specifications to -40°C are guaranteed by design and not production tested.
Note 2: Operating voltage. Since the regulator is bootstrapped to the output, once started it will operate down to +0.7V input.
Note 3: The regulator is in startup mode until the voltage is reached.
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