Rainbow Electronics MAX1636 - Manual (Page 7)

MAX1636
Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
_______________________________________________________________________________________ 7
_____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, V IN = 7V, T A = +25°C, unless otherwise noted.)
V OUT
50mV/div
5A LOAD CURRENT
0A
10A
LOAD-TRANSIENT RESPONSE
(1.8V, PWM MODE)
MAX1636 TOC13
100 µs/div
V OUT
20mV/div
V LX
INDUCTOR
CURRENT
1A
0V
5V
0A
SWITCHING WAVEFORMS
(PWM MODE)
MAX1636 TOC14
1 µs/div
V
OUT
50mV/div
V LX
INDUCTOR
CURRENT
1A
0V
5V
0A
SWITCHING WAVEFORMS
(PFM MODE)
MAX1636 TOC15
20 µs/div
V OUT = 1.8V
V OUT
1V/div
V
SHDN
5V/div
STANDBY AND STARTUP RESPONSE
(V
OUT
= 1.8V, NO LOAD)
MAX1636 TOC17
1ms/div
V OUT
20mV/div
V LX
INDUCTOR
CURRENT
4A
0
5V
2A
0A
SWITCHING WAVEFORMS
(DROPOUT OPERATION)
MAX1636 TOC16
5 µs/div
V
OUT
= 5V
V OUT
100mV/div
V DL
INDUCTOR
CURRENT
-5A
0
0
5V
-10A
OVERVOLTAGE-PROTECTION WAVEFORMS
(V
IN
SHORTED TO V
OUT
THROUGH a 0.5 Ω RESISTOR)
MAX1636 TOC18
10 µs/div