MAX1896 Ver la hoja de datos (PDF) - Maxim Integrated
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Fabricante
MAX1896 Datasheet PDF : 10 Pages
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1.4MHz SOT23 Current-Mode
Step-Up DC-DC Converter
ELECTRICAL CHARACTERISTICS
(VIN = VSHDN = 3V, FB = GND, SS = open, TA = -40°C to +85°C, unless otherwise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP
Input Supply Range
Output Voltage Adjust Range
VIN Undervoltage Lockout
Quiescent Current
Shutdown Supply Current
ERROR AMPLIFIER
Feedback Regulation Set Point
FB Input Bias Current
Line Regulation
OSCILLATOR
VIN
VOUT
UVLO
IIN
Circuit of Figure 1
VIN rising, 50mV hysteresis.
VFB = 1.3V, not switching
VFB = 1.0V, switching
V SHDN = 0
VFB
IFB
VFB = 1.24V
2.6V < VIN < 5.5V
2.6
2.25
1.2
Frequency
Maximum Duty Cycle
POWER SWITCH
Current Limit (Note 2)
On-Resistance
Leakage Current
SOFT-START
Reset Switch Resistance
fOSC
DC
ILIM
RON
ILXOFF
VFB = 1V, duty cycle = 50%
VLX = 12V
1000
82
0.55
Charge Current
CONTROL INPUT
Input Low Voltage
Input High Voltage
SHDN Input Current
VSS = 1.2V
VIL
VIH
I SHDN
V SHDN = VIN = 2.6V to 5.5V
V SHDN = VIN = 2.6V to 5.5V
V SHDN = 3V
V SHDN = 0
1.25
1.0
MAX
5.5
13
2.55
0.4
5
10
1.25
80
0.20
1800
1
10
100
7.50
0.3
50
0.1
Note 2: Current limit varies with duty cycle due to slope compensation. See the Output Current Capability section.
Note 3: Specifications to -40°C are guaranteed by design and not production tested.
UNITS
V
V
V
mA
µA
V
nA
%/V
kHz
%
A
Ω
µA
Ω
µA
V
V
µA
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