ADP2121 Analog Devices, ADP2121 Datasheet - Page 8

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

ADP2121
1.87
1.86
1.85
1.84
1.83
1.82
90
85
80
75
70
65
60
55
50
45
360
340
320
300
280
260
240
220
200
180
0.1
0.1
2.3
Figure 16. Efficiency vs. Load Current Over Temperature
AUTO MODE
Figure 18. N-Channel Drain-Source On Resistance
Figure 17. Output Voltage Accuracy (Auto Mode)
2.7
T
A
= +85°C
1
3.1
1
T
A
LOAD CURRENT (mA)
= +25°C
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
T
V
3.5
A
IN
= –40°C
= 2.7V
10
10
3.9
4.3
T
T
T
A
A
A
= +85°C
= +25°C
= –40°C
100
100
4.7
AUTO MODE
V
V
V
IN
OUT
OUT
V
V
= 3.6V
V
IN
IN
IN
= 1.82V
5.1
= 1.82V
= 5.0V
= 4.2V
= 3.6V
1000
1000
5.5
Rev. B | Page 8 of 20
100
Figure 19. Efficiency and Power Loss vs. Load Current (Auto Mode)
1.835
1.830
1.825
1.820
1.815
90
80
70
60
50
40
30
20
10
0
400
350
300
250
200
150
100
0.1
V
2.3
1
OUT
V
Figure 21. P-Channel Drain-Source On Resistance
Figure 20. Output Voltage Accuracy (PWM Mode)
OUT
= 1.82 V
2.7
= 1.82V
V
IN
EFFICIENCY
= 2.7V
1
3.1
LOAD CURRENT (mA)
V
T
V
IN
10
A
IN
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
= 4.2V
= –40°C
3.5
= 3.6V
V
V
IN
IN
10
= 2.7V
V
= 5.0V
3.9
IN
T
= 4.2V
A
= +85°C
V
4.3
IN
= 5.0V
100
100
4.7
T
A
PWM MODE
= +25°C
POWER
LOSS
V
IN
5.1
= 3.6V
1000
1000
250
200
150
100
50
0
5.5