MAX747 Maxim, MAX747 Datasheet - Page 4

• Manufacturer Part Number: MAX747
• Description: High-Efficiency PWM / Step-Down P-Channel DC-DC Controller
• Manufacturer: Maxim

High-Efficiency PWM, Step-Down
P-Channel DC-DC Controller
4
____________________________Typical Operating Characteristics (continued)
V+ = 9V, I
I
CONTINUOUS-CONDUCTION MODE WAVEFORMS
OUT
a) EXT VOLTAGE, 10V/div
b) INDUCTOR CURRENT, 1A/div
c) V
a) V+ = 6V to 12V, 5V/div
b) V
_______________________________________________________________________________________
= 2.0A
OUT
OUT
RIPPLE, 50mV/div
OUT
RIPPLE, 100mV/div
LINE-TRANSIENT RESPONSE
= 2.5A
5ms/div
5 s/div
a
b
c
a
b
V+ = 9V, I
a) EXT VOLTAGE, 5V/div
b) INDUCTOR CURRENT, 0.5A/div
c) V
MODERATE LOAD, IDLE-MODE WAVEFORMS
OUT
RIPPLE 100mV/div
OUT
= 560mA
5 s/div
DISCONTINUOUS-CONDUCTION IDLE-MODE WAVEFORMS
V+ = 9V, C
V+ = 9V, I
a) LOAD CURRENT, 0.1A TO 2.5A, 1A/div
b) V
a) EXT VOLTAGE, 10V/div
b) INDUCTOR CURRENT, 200mA/div
c) V
OUT
OUT
RIPPLE, 100mV/div
RIPPLE, 50mV/div
OUT
a
b
c
OUT
LOAD-TRANSIENT RESPONSE
= 125mA
= 430 F
100µs/div
20 s/div
b
a
a
b
c