MAX831 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX831
Maxim Integrated
MAX831 Datasheet PDF : 5 Pages
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5V/3.3V/3V/Adjustable-Output, 1A,
Step-Down, PWM, Switch-Mode DC-DC Regulators
ABSOLUTE MAXIMUM RATINGS
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Switch Voltage with Respect to Input Voltage. . . . . . . . . . . . . . . . 50V
Switch Voltage with Respect to GND
(VSW negative) (Note 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
FB/SENSE Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V, +10V
SHUT Voltage (not to exceed VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V
ILIM Voltage (forced). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V
Operating Temperature Range. . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . 0°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . -65°C to +160°C
Lead Temperature (soldering, 10sec). . . . . . . . . . . . . . . . . . . . +300°C
Note 1: Do not exceed switch-to-input voltage limitation.
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 = 25V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Input Supply Voltage Range
Switch-On Voltage (Note 2)
Switch-Off Leakage
Supply Current (Note 3)
CONDITIONS
MIN
8
ISW = 0.2A
ISW = 1A
VIN = 25V, VSW = 0V
VIN = 30V, VSW = 0V
TA = +25°C
VIN ≤ 30V, VSENSE = 5.5V (MAX831/MAX832/
MAX833) or VFB = 2.5V (MAX830)
VSHUT = 0.1V (Note 4)
Minimum Supply Voltage (Note 5)
Switch-Current Limit (Note 6)
Maximum Duty Cycle
Switching Frequency
Switching-Frequency Line Regulation
Error-Amplifier Voltage Gain
Error-Amplifier Transconductance
Error-Amplifier Source Current
Error-Amplifier Sink Current
Normal mode
Startup mode
ILIM open
RLIM = 10kΩ (Note 7)
RLIM = 7kΩ (Note 7)
TA = +25°C
TA = +25°C
VFB or VSENSE = 0V (Note 6)
8V ≤ VIN ≤ 30V
1V ≤ VC ≤ 4V
VFB = 2.0V (MAX830) or
VSENSE = 2.0V
(MAX831/832/833)
VFB = 2.5V (MAX830) or
VSENSE = 5.5V
(MAX831/832/833)
TA = +25°C
TA = +25°C
TA = +25°C
TA = +25°C
TA = +25°C
1.2
85
90
85
3000
100
0.6
TYP
8
140
7.3
3.5
1.7
1.2
0.8
90
100
20
0.03
2000
5000
140
1.0
MAX
30
1.1
1.4
150
250
11
UNITS
V
V
µA
mA
500
µA
8.0
V
4.8
2.2
A
%
110
120
kHz
0.10
9000
225
%/V
V/V
µmho
µA
1.7
mA
2 _______________________________________________________________________________________
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