ADP2121 Analog Devices, ADP2121 Datasheet - Page 6

• Manufacturer Part Number: ADP2121
• Description: 600 mA, 6 MHz Synchronous Step-Down DC-to-DC Converter
• Manufacturer: Analog Devices

ADP2121
TYPICAL PERFORMANCE CHARACTERISTICS
V
C
OUT
IN
= 3.6 V, V
= 4.7 µF (6.3 V, 0402, X5R, GRM155R60J475ME87D), EN = V
100
100
100
Figure 6. Efficiency vs. Load Current for Various Inductor Sizes
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
90
80
70
60
50
40
30
20
10
Figure 5. Efficiency vs. Load Current for All Output Voltages
0
0
0.1
0.1
0.1
OUT
L = 0.45µH
V
IN
Figure 4. Efficiency vs. Load Current
AUTO MODE
0603
= 1.82 V, L = 0.47 µH (1800 mA, 1008, LQM2HPNR47MG0L), C
V
PWM MODE
L = 0.47µH
= 5.0V
IN
AUTO MODE
0805
1
1
V
= 4.2V
1
IN
= 3.6V
V
LOAD CURRENT (mA)
LOAD CURRENT (mA)
AUTO MODE
LOAD CURRENT (mA)
IN
L = 0.47µH
= 2.7V
1008
10
10
10
PWM MODE
PWM MODE
100
100
100
V
V
V
V
V
V
V
V
OUT
OUT
OUT
OUT
OUT
IN
OUT
OUT
= 2.7V
= 1.8V
= 1.82V
= 1.85V
= 1.875V
= 2.3V
= 1.82V
= 1.82V
1000
1000
1000
Rev. B | Page 6 of 20
IN
, and T
Figure 8. Efficiency vs. Input Voltage for All Output Voltages (Auto Mode)
A
= 25°C, unless otherwise noted.
100
100
Figure 9. Efficiency vs. Input Voltage for Various Inductor Sizes
90
80
70
60
50
40
30
20
10
93
90
87
84
81
78
75
95
90
85
80
75
70
65
60
55
50
0
2.3
2.3
2.3
IN
= 2.2 µF (6.3 V, 0402, X5R, GRM155R60J225M),
Figure 7. Efficiency vs. Input Voltage (Auto Mode)
V
V
V
V
V
I
2.7
2.7
OUT
2.7
OUT
OUT
OUT
OUT
OUT
= 300mA
= 1.8V
= 1.82V
= 1.85V
= 1.875V
= 2.3V
3.1
3.1
3.1
L = 0.47µH
I
OUT
0805
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
3.5
= 100mA
3.5
3.5
3.9
3.9
3.9
I
OUT
L = 0.45µH
L = 0.47µH
4.3
4.3
= 10mA
0603
4.3
1008
I
OUT
4.7
4.7
4.7
I
V
OUT
AUTO MODE
V
VOUT = 1.82V
= 1mA
IN
OUT
= 2.7V
= 100mA
5.1
= 1.82 V
5.1
5.1
5.5
5.5
5.5