TM
MP2104 – 1.7MHz 600mA SYNCHRONOUS STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= 3.3V, V
OUT
= 1.8V, L1 = 10µH, C1 = 4.7µF, C3 = 10µF, T
A
= +25°C, unless otherwise noted.
Efficiency vs
Load Current
100
90
80
V
IN
= 3.3V
100
90
80
Efficiency vs
Load Current
V
IN
= 3.3V
V
IN
= 4.2V
1.85
1.83
Output Voltage vs
Load Current
OUTPUT VOLTAGE (V)
1.81
1.79
1.77
1.75
1.73
1.71
1.69
1.67
V
IN
= 3.3V
0 100 200 300 400 500 600 700 800 900
EFFICIENCY (%)
70
60
50
40
30
20
10
0
10
100
LOAD CURRENT (mA)
1000
MP2104-TPC01
EFFICIENCY (%)
70
60
50
40
30
20
10
0
10
V
IN
= 4.2V
100
LOAD CURRENT (mA)
1000
MP2104-TPC02
1.65
LOAD CURRENT (mA)
MP2104-TPC05
Efficiency vs
Load Current
100
90
80
100
90
70
60
50
40
30
20
10
1000
0
80
Efficiency vs
Load Current
1.810
Output Voltage vs
Supply Voltage
OUTPUT VOLTAGE (V)
1.808
1.806
1.804
1.802
I
LOAD
= 200mA
1000
1.800
2
3
4
5
SUPPLY VOLTAGE (V)
6
EFFICIENCY (%)
70
60
50
40
30
20
10
0
10
V
OUT
= 1.8V
V
IN
= 3.3V
100
LOAD CURRENT (mA)
EFFICIENCY (%)
V
OUT
= 1.8V
V
IN
= 4.2V
10
100
LOAD CURRENT (mA)
MP2104-TPC03
MP2104-TPC04
MP2104-TPC06
Regulated FB Voltage vs
Temperature
0.620
1.3
PFET Current Limit vs
Temperature
OSCILLATOR FREQUENCY (MHz)
2.05
1.95
1.85
1.75
1.65
1.55
1.45
1.35
Oscillator Frequency vs
Supply Voltage
REGULATED FB VOLTAGE (V)
PFET CURRENT LIMIT (A)
0.615
0.610
0.605
0.600
0.595
0.590
0.585
0.580
-50 -30 -10 10 30 40 70 90 110 130
TEMPERATURE (°C)
MP2104-TPC07
1.2
1.1
1.0
0.9
0.8
0.7
-50 -30 -10 10 30 40 70 90 110 130
TEMPERATURE (°C)
MP2104-TPC08
1.25
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
MP2104-TPC09
MP2104 Rev. 1.3
10/4/2005
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