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
ABSOLUTE MAXIMUM RATINGS
LX to GND ..............................................................-0.3V to +14V
IN, SHDN, FB to GND...............................................-0.3V to +6V
SS to GND ...................................................-0.3V to (VIN + 0.3V)
RMS LX Pin Current ..............................................................0.6A
Continuous Power Dissipation (TA = +70°C) (Note 1)
6-Pin SOT23 (derate 9.1mW/°C above +70°C)...........727mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Thermal properties are specified with product mounted on PC board with one square-inch of copper area and still air.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN = VSHDN = 3V, FB = GND, SS = open, TA = 0°C to +85°C, unless otherwise noted.)
PARAMETER
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
Frequency
Maximum Duty Cycle
POWER SWITCH
Current Limit (Note 2)
On-Resistance
Leakage Current
SOFT-START
Reset Switch Resistance
Charge Current
CONTROL INPUT
Input Low Voltage
Input High Voltage
SHDN Input Current
SYMBOL
VIN
VOUT
UVLO
IIN
CONDITIONS
Circuit of Figure 1
VIN rising, 50mV hysteresis
VFB = 1.3V, not switching
VFB = 1.0V, switching
V SHDN = 0, TA = +25°C
V SHDN = 0
VFB
IFB
VFB = 1.24V
2.6V < VIN < 5.5V
fOSC
DC
ILIM
RON
ILXOFF
VFB = 1V, duty cycle = 50%
VLX = 12V, TA = +25°C
VLX = 12V
VSS = 1.2V
VIL
VIH
ISHDN
V SHDN, VIN = 2.6V to 5.5V
V SHDN, VIN = 2.6V to 5.5V
V SHDN = 3V
V SHDN = 0
MIN TYP MAX UNITS
2.6
5.5
V
13
V
2.25
2.4
2.55
V
0.2
0.4
mA
1
5
0.01 0.5
µA
0.01
10
1.2
1.24 1.25
V
21
80
nA
0.05 0.20 %/V
1000 1400 1800 kHz
82
86
%
0.55 0.8
A
0.7
1
Ω
0.1
1
µA
10
100
Ω
1.5
4
7.0
µA
0.3
V
1.0
V
25
50
µA
0.01 0.1
2 _______________________________________________________________________________________
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