MAX17761 查看數據表（PDF） - Maxim Integrated
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MAX17761 Datasheet PDF : 17 Pages
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MAX17761
4.5V to 76V, 1A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Typical Operating Characteristics
(VIN = 24V, VSGND = VPGND = 0V, CVIN = 2.2μF, CVCC = 1μF, VEN/UVLO = Open, CSS = 33nF, MODE/ILIM = unconnected, TA = -40°C
to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
EFFICIENCY VS. LOAD CURRENT
(5V OUTPUT, FIGURE 4 CIRCUIT)
100
toc01
90
80
70
VIN
=
VIN
36V
=
48V
VIN
=
60V
VIN
=
76V
60
VIN = 24V
VIN = 12V
50
0.0 0.2 0.4 0.6 0.8 1.0
LOAD CURRENT (A)
CONDITIONS: PWM MODE, fSW = 400kHz
EFFICIENCY VS. LOAD CURRENT
(3.3V OUTPUT, FIGURE 5 CIRCUIT)
100
toc04
90 VIN = 12V VIN = 24V
80
70
60
VIN = 48V
VIN = 76V
50
VIN = 60V
40
VIN = 36V
30
0.00
0.01
0.10
1.00
LOAD CURRENT (A)
CONDITIONS: PFM MODE, fSW = 400kHz
LOAD AND LINE REGULATION
(5V OUTPUT, FIGURE 4 CIRCUIT)
5.20
toc07
5.15 VIN = 12V
VIN = 24V
5.10
5.05
VIN = 48V
VIN = 76V
5.00
4.95
VIN = 36V
VIN = 60V
4.90
0.0 0.2 0.4 0.6 0.8 1.0
LOAD CURRENT (A)
CONDITIONS: PFM MODE
EFFICIENCY VS. LOAD CURRENT
(3.3V OUTPUT, FIGURE 5 CIRCUIT)
100
toc02
VIN = 12V
90
VIN = 24V VIN = 36V
80
70
VIN = 48V
VIN = 60V
60
VIN = 76V
50
0.0 0.2 0.4 0.6 0.8 1.0
LOAD CURRENT (A)
CONDITIONS: PWM MODE, fSW = 400kHz
LOAD AND LINE REGULATION
(5V OUTPUT, FIGURE 4 CIRCUIT)
5.02
toc05
5.01
5.00
VIN = 24V
VIN = 48V VIN = 60V
4.99
4.98
VIN = 12V
4.97
VIN = 36V
VIN = 76V
4.96
0.0 0.2 0.4 0.6 0.8 1.0
LOAD CURRENT (A)
CONDITIONS: PWM MODE
LOAD AND LINE REGULATION
(3.3V OUTPUT, FIGURE 5 CIRCUIT)
3.5
toc08
3.45
VIN = 48V
VIN = 60V
3.4
VIN = 76V
3.35
VIN = 12V
3.3
VIN = 24V
VIN = 36V
3.25
0.0 0.2 0.4 0.6 0.8 1.0
LOAD CURRENT (A)
CONDITIONS: PFM MODE
EFFICIENCY VS. LOAD CURRENT
(5V OUTPUT, FIGURE 4 CIRCUIT)
100
toc03
VIN = 12V VIN = 24V VIN = 36V
90
80
70
VIN = 76V
60
VIN = 48V VIN = 60V
50
40
0.00
0.01
0.10
1.00
LOAD CURRENT (A)
CONDITIONS: PFM MODE, fSW = 400kHz
LOAD AND LINE REGULATION
(3.3V OUTPUT, FIGURE 5 CIRCUIT)
3.36
toc06
3.35
VIN = 24V
VIN = 48V VIN = 76V
3.34
3.33
3.32
3.31
VIN = 12V
3.30
VIN = 36V VIN = 60V
3.29
0.0 0.2 0.4 0.6 0.8 1.0
LOAD CURRENT (A)
CONDITIONS: PWM MODE
SOFT-START/SHUTDOWN FROM EN/UVLO,
(5V OUTPUT, PWM MODE, 1A LOAD CURRENT,
FIGURE 4 CIRCUIT)
toc09
VEN/UVLO
5V/div
VOUT
IOUT
VRESET
2ms/div
2V/div
0.5A/div
5V/div
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