MAX1636 Datasheet, PDF (7/24 Pages) Maxim Integrated Products – Low-Voltage, Precision Step-Down Controller for Portable CPU Power

Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
_____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, V_IN = 7V, T_A = +25°C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE
(1.8V, PWM MODE)
SWITCHING WAVEFORMS
(PWM MODE)
V_OUT
50mV/div
10A
5A LOAD CURRENT
0A
100µs/div
SWITCHING WAVEFORMS
(PFM MODE)
V_OUT = 1.8V
V_OUT
50mV/div
5V
V_LX
0V
1A _INDUCTOR
CURRENT
0A
20µs/div
STANDBY AND STARTUP RESPONSE
(V_OUT = 1.8V, NO LOAD)
V_OUT
20mV/div
5V
V_LX
0V
1A _INDUCTOR
CURRENT
0A
1µs/div
SWITCHING WAVEFORMS
(DROPOUT OPERATION)
V_OUT = 5V
V_OUT
20mV/div
5V
V_LX
0
4A
INDUCTOR
CURRENT
2A
0A
5µs/div
OVERVOLTAGE-PROTECTION WAVEFORMS
(V_IN SHORTED TO V_OUT
THROUGH a 0.5Ω RESISTOR)
V_OUT
1V/div
V_SHDN
5V/div
V_OUT
100mV/div
5V
V_DL
0
0
-5A
INDUCTOR
CURRENT
-10A
1ms/div
10µs/div
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