TM
MP2101 – 1.6MHz SYNCHRONOUS STEP-DOWN PLUS 200mA LDO
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 3.6V, VOUT1 = 1.8V, VOUT2 = 1.2V, CIN1 = 4.7 µF, CIN2 = 1µF, CO1 = 10µF, CO2 = 1µF, L = 2.2µH,
TA = +25°C, unless otherwise noted.
Input Ramp Up
Input Ramp Down
Heavy Load Ripple
EN = 4V, I
= 0.3A,
= 0.1A Resistive Load
EN = 4V, I
= 0.3A,
= 0.1A Resistive Load
EN1 = V = 5V,
IN
OUT1
OUT1
I
I
OUT2
I
= 0.8A Resistive Load
OUT2
OUT1
V
OUT1
10mV/div.
V
IN
2V/div.
V
IN
2V/div.
V
SW
2V/div.
V
V
OUT1
OUT1
2V/div.
1V/div.
I
L
0.5A/div.
V
V
OUT2
OUT2
1V/div.
1V/div.
1ms/div.
400ns/div.
PWROK Off vs
Shorted
PWROK Off vs
V Shorted
OUT2
Over Current Protection
I
= 0.3A Resistive Load
V
OUT1
OUT1
EN = 4V, I
= 0.3A,
EN = 4V, I
= 0.3A,
OUT1
= 0.1A Resistive Load
OUT1
= 0.1A Resistive Load
I
I
OUT2
OUT2
V
OUT1
2V/div.
SW
5V/div.
PWROK
2V/div.
V
PWROK
2V/div.
V
OUT1
1V/div.
V
OUT1
1V/div.
V
OUT2
1V/div.
I
V
L
OUT2
0.5A/div.
1V/div.
LDO Over Current
Protection
Switcher Load Transient
LDO Load Transients
I
= 0.8A Resistive Load
V
I
= 3.3V, V
= 1.2V,
= 0.02A to 0.15A Resistive Load
OUT1
IN2 OUT2
V
= 3.3V, V
= 2.5V
OUT2
IN2
OUT2
V
V
OUT1
OUT2
V
0.1V/div.
50mV/div.
OUT2
1V/div.
I
I
OUT2
OUT2
I
L
0.1A/div.
0.1A/div.
0.5A/div.
MP2101 Rev. 1.0
8/18/2006
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