MAX727 데이터 시트보기 (PDF) - Maxim Integrated
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MAX727 Datasheet PDF : 4 Pages
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5V/3.3V/3V 2A Step-Down, PWM,
Switch-Mode DC-DC Regulators
ABSOLUTE MAXIMUM RATINGS
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45V
Switch Voltage with Respect to Input Voltage. . . . . . . . . . . . . . . . 50V
Switch Voltage with Respect to GND Pin (VSW negative)
(Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
SENSE Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V, +10V
Operating Temperature Ranges
MAX72_CCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
MAX72_ECK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Junction Temperature Ranges:
MAX72_CCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +125°C
MAX72_ECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 40°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . -65°C to +160°C
Lead Temperature (soldering, 10sec). . . . . . . . . . . . . . . . . . . . +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
(VIN = 25V, Tj = TMIN to TMAX, unless otherwise noted.)
PARAMETER
CONDITIONS
Input Supply Voltage Range
Switch-On Voltage (Note 2)
Switch-Off Leakage
Supply Current (Note 3)
Minimum Supply Voltage
Switch-Current Limit (Note 5)
Maximum Duty Cycle
Switching Frequency
Switching Frequency Line Regulation
Error-Amplifier Voltage Gain
Error-Amplifier Transconductance
Error-Amplifier Source Current
Error-Amplifier Sink Current
ISW = 0.5A
ISW = 2A
VIN = 25V, VSW = 0V
VIN = 40V, VSW = 0V
VIN ≤ 40V, VSENSE = 5.5V
Normal Mode
Start-Up Mode (Note 4)
Tj = +25°C
Tj = +25°C
Tj ≥ 0°C
Tj < 0°C
VOUT = VSENSE = 0V (Note 5)
Tj = +25°C
Tj ≤ +125°C
Tj = +25°C
8V ≤ VIN ≤ 40V
1V ≤ VC ≤ 4V
Tj = +25°C
Tj = +25°C
VSENSE = VOUT - 10%
Tj = +25°C
VSENSE = VOUT + 10%
Tj = +25°C
MIN
8.0
2.0
85
90
85
3000
100
0.6
TYP
8.5
7.3
3.5
3.5
2.6
90
100
20
0.03
2000
5000
140
1.0
MAX
40.0
1.2
1.7
150
250
11
8.0
4.8
5.0
3.2
110
120
UNITS
V
V
µA
mA
V
A
%
kHz
0.10
9000
225
1.7
%/V
V/V
µmho
µA
mA
2 _______________________________________________________________________________________
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