MAX1836(2002) View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX1836 Datasheet PDF : 13 Pages
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24V Internal Switch, 100% Duty Cycle,
Step-Down Converters
Typical Operating Characteristics (continued)
(Circuits of Figures 1 (MAX1836) and 2 (MAX1837), VIN = 12V, SHDN = IN, TA = +25°C.)
MAX1837EUT33
EFFICIENCY vs. INPUT VOLTAGE
100
FIGURE 2
95
VOUT = 3.3V
L1 = 47µH
90
85
IOUT = 200mA
80
MAX1837EUT33
SWITCHING FREQUENCY vs. INPUT VOLTAGE
100
IOUT = 200mA
FIGURE 2
10
VOUT = 3.3V
L1 = 47µH
MAX1837EUT33
PEAK INDUCTOR CURRENT vs. INPUT VOLTAGE
1000
FIGURE 2
VOUT = 3.3V
800 L1 = 47µH
IOUT = 200mA
IOUT = 10mA
600
400
75
70
0
IOUT = 10mA
4 8 12 16 20 24
INPUT VOLTAGE (V)
1
0
IOUT = 10mA
4 8 12 16 20 24
INPUT VOLTAGE (V)
200
LIMITED BY
tON(MIN)
0
048
LIMITED BY
ILIM
12 16 20 24
INPUT VOLTAGE (V)
MAX1837EUT50
OUTPUT VOLTAGE vs. LOAD CURRENT
5.04
VIN = 12V TO 24V VIN = 9V
5.02
MAX1837EUT50
EFFICIENCY vs. LOAD CURRENT
100
FIGURE 6
VOUT = 5V
95
VIN = 9V
VIN = 7V
90
VIN = 12V
5.00
85
4.98
VIN = 7V
FIGURE 6
4.96
0 50 100 150 200 250 300
LOAD CURRENT (mA)
MAX1837EUT50
DROPOUT VOLTAGE vs. LOAD CURRENT
400
FIGURE 6
350 VOUT = 5V
300
250
200
150
100
50
0
0
100
200
300
LOAD CURRENT (mA)
80
75
VIN = 24V
VIN = 18V
70
0.1
1
10
100
1000
LOAD CURRENT (mA)
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
15
14
13
12
11
10
0
4 8 12 16 20 24
INPUT VOLTAGE (V)
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