MAX887 Maxim, MAX887 Datasheet - Page 5

• Manufacturer Part Number: MAX887
• Description: 100% Duty Cycle / Low-Noise / Step-Down / PWM DC-DC Converter
• Manufacturer: Maxim

(Circuit of Figure 2, T
____________________________Typical Operating Characteristics (continued)
0mA
C
A
B
C
A
B
_______________________________________________________________________________________
A
V
A: LX, 5V/div
B: V
C: INDUCTOR CURRENT, 500mA/div
V
A: LX, 5V/div
B: V
C: INDUCTOR CURRENT, 200mA/div
HEAVY-LOAD, PWM-MODE
= +25°C, unless otherwise noted.)
LIGHT-LOAD, PFM-MODE
SWITCHING WAVEFORMS
SWITCHING WAVEFORMS
IN
IN
= 5V, V
= 5V, V
OUT
OUT
, 20mV/div, AC COUPLED
, 20mV/div, AC COUPLED
OUT
OUT
1 s/div
1 s/div
= 3.3V, LOAD = 0mA
= 3.3V, LOAD = 500mA
Step-Down, PWM DC-DC Converter
100% Duty Cycle, Low-Noise,
C
A
B
C
A
B
MEDIUM-LOAD, PFM-MODE
V
A: LX, 5V/div
B: V
C: INDUCTOR CURRENT, 200mA/div
V
A: LX, 5V/div
B: V
C: INDUCTOR CURRENT, 500mA/div
SWITCHING WAVEFORMS
IN
LIGHT-LOAD, PWM-MODE
SWITCHING WAVEFORMS
IN
= 5V, V
OUT
= 5V, V
OUT
, 20mV/div, AC COUPLED
, 20mV/div, AC COUPLED
OUT
OUT
10 s/div
1 s/div
= 3.3V, LOAD = 70mA
= 3.3V, LOAD = 0mA
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