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 (continued)
(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.)
LOAD CURRENT STEPPED FROM 0.5A TO 0.75A
(3.3V OUTPUT, PWM MODE, FIGURE 5 CIRCUIT)
toc19
LOAD CURRENT STEPPED FROM 0A TO 0.25A
(5V OUTPUT, FIGURE 4 CIRCUIT)
toc20
LOAD CURRENT STEPPED FROM 0A TO 0.25A
(3.3V OUTPUT, FIGURE 5 CIRCUIT)
toc21
VOUT
(AC)
50mV/div
VOUT
(AC)
100mV/div
VOUT
(AC)
50mV/div
IOUT
200mA/div
100µs/div
LOAD CURRENT STEPPED FROM 0A TO 0.25A
(5V OUTPUT, FIGURE 4 CIRCUIT)
toc22
IOUT
100mA/div
100µs/div
CONDITIONS: PWM MODE
LOAD CURRENT STEPPED FROM 0A TO 0.25A
(3.3V OUTPUT, FIGURE 5 CIRCUIT)
toc23
IOUT
100mA/div
100µs/div
CONDITIONS: PWM MODE
APPLICATION OF EXTERNAL CLOCK AT 600kHz
(5V OUTPUT, FIGURE 4 CIRCUIT)
toc24
VOUT
(AC)
100mV/div
VOUT
(AC)
100mV/div
VLX
10V/div
IOUT
100mA/div
IOUT
1ms/div
CONDITIONS: PFM MODE
BODE PLOT
(5V OUTPUT, FIGURE 4 CIRCUIT)
toc25
40
30
100
1ms/div
CONDITIONS: PFM MODE
20
50
10
0
0
-10 CROSSOVER
FREQUENCY = 15.9kHz,
PHASE MARGIN = 70.6°
-20
-50
103
104
105
FREQUENCY (Hz)
CONDITIONS: 1A LOAD CURRENT
100mA/div
VSYNC
4μs/div
BODE PLOT
(3.3V OUTPUT, FIGURE 5 CIRCUIT)
toc26
40
30
100
20
50
10
0
0
-10
CROSSOVER
FREQUENCY = 15.8kHz,
PHASE MARGIN = 69.8°
-20
-50
103
104
105
FREQUENCY (Hz)
CONDITIONS: 1A LOAD CURRENT
2V/div
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