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MAX1844 Datasheet(PDF) 6 Page - Maxim Integrated Products

Part # MAX1844
Description  High-Speed Step-Down Controller with Accurate Current Limit for Notebook Computers
PDF  24 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1844 Datasheet(HTML) 6 Page - Maxim Integrated Products

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High-Speed Step-Down Controller with
Accurate Current Limit for Notebook Computers
6
_______________________________________________________________________________________
100
60
0.01
1
10
EFFICIENCY vs. LOAD CURRENT
70
65
75
80
85
90
95
LOAD CURRENT (A)
0.1
VIN = 7V
VIN = 12V
VIN = 20V
350
0
0.01
1
10
FREQUENCY vs. LOAD CURRENT
100
50
150
200
250
300
LOAD CURRENT (A)
0.1
VIN = 15V, SKIP = VCC
VIN = 15V, SKIP = GND
VIN = 7V, SKIP = GND
VIN = 7V, SKIP = VCC
320
310
300
290
280
015
5
10
202530
FREQUENCY vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
ILOAD = 1A
290
300
310
320
330
-40
-10
20
50
-25
5
35
65
80
FREQUENCY vs. TEMPERATURE
TEMPERATURE (
°C)
ILOAD = 1A
ILOAD = 4A
-40
5
20
-25 -10
35
50
65
80
CURRENT LIMIT vs. TEMPERATURE
TEMPERATURE (
°C)
3
4
5
6
0
100
200
300
400
500
600
700
800
010
5
15202530
CONTINUOUS-TO-DISCONTINUOUS INDUCTOR
CURRENT vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
CONTINUOUS INDUCTOR CURRENT
DISCONTINUOUS INDUCTOR CURRENT
0
1
2
3
4
5
6
7
8
010
5
15202530
CURRENT LIMIT vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
1.8
1.6
1.4
1.2
1.0
1.0
1.4
1.2
1.6
1.8
NORMALIZED OVERVOLTAGE
TRIP THRESHOLD vs. VOVP
VOVP (V)
OVERVOLTAGE TRIP THRESHOLD
OUTPUT VOLTAGE SET POINT
110
112
116
114
118
120
-40
10
-15
35
60
85
OVERVOLTAGE TRIP THRESHOLD
vs. TEMPERATURE
TEMPERATURE (
°C)
__________________________________________Typical Operating Characteristics
(Circuit of Figure 1, VIN = 15V, SKIP = GND, TON = unconnected, TA = +25°C, unless otherwise noted.)



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