ADP1879 Analog Devices, ADP1879 Datasheet - Page 8

• Manufacturer Part Number: ADP1879
• Description: Synchronous Buck Controller with Constant On-Time and Valley Current Mode with Power Saving Mode
• Manufacturer: Analog Devices

ADP1878/ADP1879
100
100
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
5
0
5
0
10
10
10
V
V
V
IN
IN
IN
= 16.5V (PSM)
V
= 16.5V (PSM)
= 13V (PSM)
Figure 10. Efficiency—1.0 MHz, V
Figure 11. Efficiency—1.0 MHz, V
IN
Figure 12. Efficiency—1.0 MHz, V
V
V
IN
IN
= 16.5V (PSM)
= 13V (PSM)
= 13V (PSM)
100
100
100
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
WÜRTH INDUCTOR:
744303012, L = 0.12µH, DCR = 0.33mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
T
V
f
WÜRTH INDUCTOR:
744303022, L = 0.22µH, DCR = 0.33mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
WÜRTH INDUCTOR:
744355090, L = 0.9µH, DCR = 1.6mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
SW
A
OUT
T
V
f
T
V
f
SW
A
OUT
SW
= 25°C
V
A
OUT
= 1.0MHz
= 25°C
IN
V
= 25°C
= 1.8V
= 1.0MHz
1k
1k
1k
= 1.0MHz
IN
= 0.8V
= 13V
V
= 5V
IN
= 13V
V
= 16.5V
IN
= 16.5V
V
IN
OUT
OUT
V
OUT
IN
= 13V
= 0.8 V
= 1.8 V
10k
10k
10k
= 16.5V
= 5 V
100k
100k
100k
Rev. 0 | Page 8 of 40
1.821
1.816
1.811
1.806
1.801
1.796
1.791
1.786
7.100
7.095
7.090
7.085
7.080
7.075
7.070
7.065
7.060
7.055
7.050
7.045
7.040
7.035
7.030
7.025
7.020
7.015
7.010
7.005
7.000
0.807
0.806
0.805
0.804
0.803
0.802
0.801
0.800
0.799
0.798
0.797
0.796
0.795
0.794
0.793
0.792
Figure 13. Output Voltage Accuracy—300 kHz, V
Figure 14. Output Voltage Accuracy—300 kHz, V
Figure 15. Output Voltage Accuracy—300 kHz, V
0
0
0
1500
1000
V
IN
= 13V
+125°C
+25°C
–40°C
2000
V
+125°C
+25°C
–40°C
3000
IN
2000
= 5.5V
+125°C
+25°C
–40°C
4500
3000
4000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
V
LOAD CURRENT (mA)
IN
6000
V
V
IN
IN
= 16.5V
4000
V
= 13V
= 16.5V
+125°C
+25°C
–40°C
IN
7500
6000
= 13V
+125°C
+25°C
–40°C
5000
9000 10,500 12,000 13,500 15,000
6000
8000
V
IN
= 16.5V
7000
Data Sheet
+125°C
+25°C
–40°C
OUT
OUT
10,000
OUT
= 0.8 V
= 1.8 V
8000
= 7 V
9000