MAX1795 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX1795 Datasheet PDF : 13 Pages
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MAX1795/MAX1796/
MAX1797
Low-Supply Current, Step-Up DC-DC Converters
with True Shutdown
Absolute Maximum Ratings
OUT, LX, SHDN, LBI, LBO, BATT to GND...............-0.3V to +6V
FB............................................................ -0.3V to (VOUT + 0.3V)
ILX, IOUT..............................................................................±1.5A
Output Short-Circuit Duration................................................... 5s
Continuous Power Dissipation
8-Pin μMAX (derate 4.1mW/°C above +70°C).............330mW
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
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
(VBATT = +2V, OUT = FB (VOUT = +3.3V), SHDN = LBI = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
Minimum Input Voltage
Operating Voltage
Startup Voltage
Startup Voltage Tempco
Output Voltage
Adjustable Output Voltage Range
Steady-State Output Current
Feedback Set-Point Voltage
(Adjustable Mode)
Feedback Input Current
Internal NFET, PFET
On-Resistance
LX Switch Current Limit
(NFET only)
LX Leakage Current
Synchronous Rectifier Turn-Off
Current Limit
Damping Switch On-Resistance
Operating Current into OUT
(Note 2)
SYMBOL
VBATT
CONDITIONS
After startup
(Note 1)
TA = +25°C, RL = 3kΩ
VOUT
FB = OUT
FB = GND
IOUT
VFB
IFB
RDS(ON)
ILIM
ILEAK
BATT = +2V,
FB = OUT
(VOUT = +3.3V)
BATT = +2V,
FB = GND
(VOUT = +5.0V)
MAX1795
MAX1796
MAX1797
MAX1795
MAX1796
MAX1797
VOUT = +2V to +5.5V
VFB = +1.24V
VOUT = +3.3V,
ILX = 100mA
NFET
PFET
MAX1795
MAX1796
MAX1797
VLX = 0 and +5.5V, VOUT = +5.5V
RDAMP
VFB = +1.4V
MIN TYP MAX UNITS
0.7
V
1.0
5.5
V
0.85 1.0
V
-2.2
mV/°C
3.17 3.3 3.43
V
4.80 5.0 5.20
2.0
5.5
V
100 180
200 300
400 550
mA
50 120
100 200
250 370
1.20 1.24 1.28
V
4
100
nA
0.17 0.3
Ω
0.27 0.45
0.2 0.25 0.35
0.4
0.5 0.625
A
0.8 1.0 1.25
0.2
µA
25
mA
100 200 400
Ω
25
45
µA
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