MP1470 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 12V, VOUT = 3.3V, L = 4.9µH, TA = +25°C, unless otherwise noted.
Startup through
Input Voltage
Shutdown through
Input Voltage
Startup through
Input Voltage
I
= 0A
I
= 0A
I
= 2A
OUT
OUT
OUT
V
V
OUT
OUT
V
OUT
2V/div.
2V/div.
2V/div.
V
V
V
IN
IN
IN
10V/div.
10V/div.
10V/div.
V
V
V
SW
SW
SW
5V/div.
5V/div.
5V/div.
I
I
L
L
500mA/div.
200mA/div.
I
L
1A/div.
Shutdown through
Input Voltage
Startup through Enable
Shutdown through Enable
I
= 0A
I
= 0A
OUT
OUT
I
= 2A
OUT
V
V
V
OUT
OUT
OUT
2V/div.
2V/div.
2V/div.
V
IN
10V/div.
V
V
EN
EN
2V/div.
2V/div.
V
V
V
SW
SW
SW
5V/div.
10V/div.
10V/div.
I
I
L
L
500mA/div.
500mA/div.
I
L
1A/div.
Startup through Enable
Shutdown through Enable
Input/Output Ripple
I
= 2A
I
= 2A
I
= 2A
OUT
OUT
OUT
V
OUT/AC
50mV/div.
V
V
OUT
OUT
2V/div.
2V/div.
V
IN/AC
200mV/div.
V
V
EN
EN
2V/div.
2V/div.
V
V
V
SW
SW
SW
10V/div.
10V/div.
10V/div.
I
I
L
I
L
L
1A/div.
1A/div.
1A/div.
MP1470 Rev. 1.02
8/27/2013
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5
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