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參數(shù)資料
| 型號： | MAX724 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 5A/2A Step-Down, PWM, Switch-Mode DC-DC Regulators |
| 中文描述： | 5A/2A、降壓型、PWM、開關(guān)模式DC-DC穩(wěn)壓器 |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 92K |
| 代理商： | MAX724 |
8V
≤
V
IN
≤
40V
M
5A/2A S tep-Down, PWM,
S witc h-Mode DC-DC Regulators
2
_______________________________________________________________________________________
Input Voltage..................................................45V
Switch Voltage with Respect to Input Voltage................50V
Switch Voltage with Respect to Ground Pin (V
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
J unction 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
ELECTRICAL CHARACTERISTICS
(V
IN
= 25V, T
j
= T
MIN
to T
MAX
, unless otherwise noted.)
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.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Switch-On Voltage (Note 2)
MAX724
T
j
≥
0°C
T
j
< 0°C
T
j
≥
0°C
T
j
< 0°C
1.85
2.10
2.50
MAX726
1.2
1.7
Switch-Off Leakage
MAX724
T
j
= +25°C
T
j
= +25°C
T
j
= +25°C
T
j
= +25°C
5
300
μA
10
500
ABSOLUTE MAXIMUM RATINGS
I
SW
= 1A
I
SW
= 5A
I
SW
= 0.5A
I
SW
= 2A
V
IN
≤
25V, V
SW
= 0V
V
IN
= 40V, V
SW
= 0V
V
IN
≤
25V, V
SW
= 0V
V
IN
= 40V, V
SW
= 0V
MAX726
150
250
11
8.0
2.30
V
V
FB
= 2.5V, V
IN
≤
40V
Normal Mode
8.5
7.3
Supply Current (Note 3)
mA
V
85
90
85
90
100
Maximum Duty Cycle
%
T
j
= +25°C
T
j
≤
+125°C
110
120
T
j
= +25°C
20
0.03
Switching Frequency
kHz
V
FB
= grounded through 2k
(Note 5)
MAX724
MAX726
5.5
2.0
6.5
2.6
8.5
3.2
Switch-Current Limit (Note 5)
A
0.1
Switching Frequency Line Regulation
%/V
Input Supply Voltage Range
8.0
40.0
V
T
j
≥
0°C
T
j
< 0°C
3.5
3.5
4.8
5.0
V
Start-Up Mode (Note 4)
Minimum Supply Voltage
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