TM
MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= 12V, V
O
= 3.3V, L = 10µH, C1 = 10µF, C2 = 22µF x 2, T
A
= +25°C, unless otherwise noted.
Feeback Voltage vs.
Efficiency vs
Temperature
Load Current
95
0.810
FEEDBACK VOLTAGE (V)
90
V
IN
= 12V
EFFICIENCY (%)
85
80
75
70
65
60
55
50
0
0.5
1.0
1.5
2.0
0.805
0.800
0.795
0.790
0.7850
0.780
-40
V
IN
= 12V
V
IN
= 28V
V
IN
= 24V
V
IN
= 4.75V
V
OUT
= 2.5V
2.5
3.0
3.5
-20
LOAD CURRENT (A)
MP2303-EC02
TEMPERATURE (oC)
0
20
40
60
80
MP2303-TPC01
UVLO Rising vs.
Temperature
4.5
2.70
Enable Lockout Threshold
vs. Temperature
345
2.65
2.60
2.55
2.50
2.45
2.40
2.35
Oscillator Frequency
UVLO THRESHOLD (V)
4.4
4.3
4.2
4.1
4.0
3.9
3.8
3.7
-40
-20
0
20
40
60
80
ENABLE VOLTAGE (V)
FREQUENCY (KHz)
340
335
330
TEMPERATURE (oC)
2.30
-40
-20
TEMPERATURE (oC)
0
20
40
60
80
325
-40
-20
TEMPERATURE (oC)
0
20
40
60
80
MP2303-TPC02
MP2303-TPC03
MP2303-TPC04
MP2303 Rev. 0.92
5/2/2006
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5
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