MAX770 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX770 Datasheet PDF : 20 Pages
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5V/12V/15V or Adjustable, High-Efficiency,
Low IQ, Step-Up DC-DC Controllers
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 2a, TA = +25°C, unless otherwise noted.)
MAX770
HEAVY-LOAD SWITCHNG WAVEFORMS
MAX770
LIGHT-LOAD SWITCHING WAVEFORMS
VOUT
0
A
A
ILIM
ILIM
ILIM
2
B
2
0
0
B
C
C
20µs/div
VIN = 2.9V, IOUT = 0.9A
A: EXT VOLTAGE, 5V/div
B: INDUCTOR CURRENT 1A/div
C: VOUT RIPPLE 100mV/div, AC-COUPLED
20µs/div
V+ = 3V, IOUT = 165mA
A: EXT VOLTAGE, 5V/div
B: INDUCTOR CURRENT, 1A/div
C: VOUT RIPPLE 100mV/div, AC-COUPLED
MAX770
LINE-TRANSIENT RESPONSE
MAX770
LOAD-TRANSIENT RESPONSE
4.5V
A
A
2.7V
0
0
B
B
2ms/div
IOUT = 0.7A
A: VIN, 2.7V TO 4.5V, 2V/div
B: VOUT RIPPLE, 100mV/div, AC-COUPLED
2ms/div
VIN = 3V
A: LOAD CURRENT 0.5A/div (0A to 1A)
B: VOUT RIPPLE, 100mV/div, AC-COUPLED
6 _______________________________________________________________________________________
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