MAX724 데이터 시트보기 (PDF) - Maxim Integrated
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MAX724 Datasheet PDF : 13 Pages
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5A/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 Ground Pin (VSW Negative)
(Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
Feedback 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
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
CONDITIONS
MAX724
ISW = 1A
ISW = 5A
MAX726
ISW = 0.5A
ISW = 2A
MAX724
VIN ≤ 25V, VSW = 0V
VIN = 40V, VSW = 0V
MAX726
VIN ≤ 25V, VSW = 0V
VIN = 40V, VSW = 0V
VFB = 2.5V, VIN ≤ 40V
Normal Mode
Start-Up Mode (Note 4)
MAX724
MAX726
VFB = grounded through 2kΩ (Note 5)
8V ≤ VIN ≤ 40V
Tj ≥ 0°C
Tj < 0°C
Tj ≥ 0°C
Tj < 0°C
Tj = +25°C
Tj = +25°C
Tj = +25°C
Tj = +25°C
Tj ≥ 0°C
Tj < 0°C
Tj = +25°C
Tj ≤ +125°C
Tj = +25°C
MIN TYP MAX
8.0
40.0
1.85
2.10
2.30
2.50
1.2
1.7
5 300
10 500
150
250
8.5 11
7.3 8.0
3.5 4.8
3.5 5.0
5.5 6.5 8.5
2.0 2.6 3.2
85 90
90 100 110
85
120
20
0.03 0.1
UNITS
V
V
µA
mA
V
V
A
%
kHz
%/V
2 _______________________________________________________________________________________
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