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MAX8546EUB+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
MAX8545/MAX8546/MAX8548
Low-Cost, Wide Input Range, Step-Down
Controllers with Foldback Current Limit
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V
IN
= VL = V
CC
= 5V, typical values are at T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc01
LOAD CURRENT (A)
(CIRCUIT OF FIGURE 1; TABLE 1a)
EFFICIENCY (%)
10.1
10
20
30
40
50
60
70
80
90
100
0
0.01 10
V
IN
= 3.3V
V
OUT
= 1.2V
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc02
LOAD CURRENT (A)
(CIRCUIT OF FIGURE 1; TABLE 1a)
EFFICIENCY (%)
10.1
10
20
30
40
50
60
70
80
90
100
0
0.01 10
V
IN
= 5V
V
OUT
= 1.8V
V
OUT
= 3.3V
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc03
LOAD CURRENT (A)
(CIRCUIT OF FIGURE 2; TABLE 2a)
EFFICIENCY (%)
10.1
10
20
30
40
50
60
70
80
90
100
0
0.01 10
V
OUT
= 1.8V
V
OUT
= 3.3V
V
IN
= 12V
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc04
LOAD CURRENT (A)
(CIRCUIT OF FIGURE 2; TABLE 2a)
EFFICIENCY (%)
10.1
10
20
30
40
50
60
70
80
90
100
0
0.01 10
V
IN
= 17V
V
OUT
= 3.3V
V
OUT
= 1.8V
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc05
LOAD CURRENT (A)
EFFICIENCY (%)
10.1
10
20
30
40
50
60
70
80
90
100
0
0.01 10
V
OUT
= 1.8V
V
OUT
= 1.2V
V
IN
= 3.3V
(CIRCUIT OF FIGURE 1; TABLE 1b)
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc06
LOAD CURRENT (A)
EFFICIENCY (%)
10.1
10
20
30
40
50
60
70
80
90
100
0
0.01 10
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
IN
= 5V
(CIRCUIT OF FIGURE 1; TABLE 1b)
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc07
LOAD CURRENT (A)
EFFICIENCY (%)
10.1
10
20
30
40
50
60
70
80
90
100
0
0.01 10
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
IN
= 12V
(CIRCUIT OF FIGURE 2; TABLE 2b)
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc08
LOAD CURRENT (A)
EFFICIENCY (%)
10.1
10
20
30
40
50
60
70
80
90
100
0
0.01 10
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
IN
= 17V
(CIRCUIT OF FIGURE 2; TABLE 2b)
CHANGE IN OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX8545/46/48 toc09
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
5432
2.485
2.490
2.495
2.500
2.505
2.510
2.515
2.520
2.480
16
V
OUT
= 2.5V
V
IN
= 12V
MAX8545/MAX8546/MAX8548
Low-Cost, Wide Input Range, Step-Down
Controllers with Foldback Current Limit
_______________________________________________________________________________________ 5
CHANGE IN OUTPUT VOLTAGE
vs. INPUT VOLTAGE
MAX8545/46/48 toc10
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
4.54.03.53.0
1.79
1.80
1.81
1.82
1.83
1.84
1.78
2.5
I
LOAD
= 6A
CHANGE IN OUTPUT VOLTAGE
vs. INPUT VOLTAGE
MAX8545/46/48 toc11
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
18 20 22 24161412
2.49
2.50
2.51
2.52
2.48
10
I
LOAD
= 6A
FREQUENCY vs. INPUT VOLTAGE
MAX8545/46/48 toc12
INPUT VOLTAGE (V)
FREQUENCY (kHz)
22.9417.8812.827.76
294
298
302
306
310
290
2.70 28.00
V
OUT
= 2.5V
NO LOAD
MAX8545/
MAX8546
FREQUENCY vs. TEMPERATURE
MAX8545/46/48 toc13
TEMPERATURE (
°
C)
FREQUENCY (kHz)
60.0035.0010.00-15.00
294
298
302
306
310
290
-40.00 85.00
V
IN
= 12V
V
OUT
= 2.5V
NO LOAD
MAX8545/
MAX8546
0
V
OUT
AC COUPLED
100mV/div
I
OUT
5A/div
40μs/div
LOAD TRANSIENT RESPONSE
MAX8545 toc14
V
IN
= 17V
V
OUT
= 2.5V
Typical Operating Characteristics (continued)
(V
IN
= VL = V
CC
= 5V, typical values are at T
A
= +25°C, unless otherwise noted.)
MAX8545/MAX8546/MAX8548
Low-Cost, Wide Input Range, Step-Down
Controllers with Foldback Current Limit
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
IN
= VL = V
CC
= 5V, typical values are at T
A
= +25°C, unless otherwise noted.)
V
OUT
1V/div
V
IN
5V/div
INDUCTOR
CURRENT
5A/div
1ms/div
STARTUP WAVEFORM
MAX8545 toc15
I
LOAD
= 3A
V
OUT
1V/div
V
IN
5V/div
INDUCTOR
CURRENT
2A/div
2ms/div
SHUTDOWN WAVEFORM
MAX8545 toc16
I
LOAD
= 3A
V
OUT
2V/div
V
IN
5V/div
I
IN
10A/div
I
OUT
5A/div
SHORT-CIRCUIT WAVEFORM
MAX8545 toc18
V
OUT
2V/div
V
IN
20V/div
I
IN
2A/div
INDUCTOR
CURRENT
5A/div
1ms/div
0
0
0
0
SHORT-CIRCUIT WAVEFORM
MAX8545 toc17
GAIN AND PHASE vs. FREQUENCY
MAX8545/46/48 toc19
FREQUENCY (kHz)
GAIN (dB)
PHASE (DEGREES)
101
-120
-100
-80
-60
-40
-20
0
20
40
60
-140
0.1 100
180
150
120
90
60
30
V
IN
= 17V, V
OUT
= 2.5V
I
LOAD
= 6A
GAIN
PHASE
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

MAX8546EUB+T

Mfr. #:
Buy MAX8546EUB+T
Manufacturer:
Maxim Integrated
Description:
Switching Controllers Wide Input Range Step-Down Controller
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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