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Data Sheet ADP1870/ADP1871
Rev. B | Page 7 of 44
TYPICAL PERFORMANCE CHARACTERISTICS
100
95
90
85
80
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70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
10 100 1k 10k 100k
EFFICIENCY (%)
LOAD CURRENT (mA)
T
A
= 25°C
V
OUT
= 0.8V
f
SW
= 300kHz
WÜRTH INDUCTOR:
744325072, L = 0.72µH, DCR = 1.3mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
V
IN
= 13V (PSM)
V
IN
= 16.5V (PSM)
V
IN
= 13V
V
IN
= 16.5V
08730-104
Figure 4. Efficiency—300 kHz, V
OUT
= 0.8 V
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
10 100 1k 10k 100k
EFFICIENCY (%)
LOAD CURRENT (mA)
T
A
= 25°C
V
OUT
= 1.8V
f
SW
= 300kHz
WÜRTH INDUCTOR:
744325120, L = 1.2µH, DCR = 1.8mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
V
IN
= 5V (PSM)
V
IN
= 13V (PSM)
V
IN
= 16.5V (PSM)
V
IN
= 13V
V
IN
= 16.5V
08730-105
Figure 5. Efficiency—300 kHz, V
OUT
= 1.8 V
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
10 100 1k 10k 100k
EFFICIENCY (%)
LOAD CURRENT (mA)
T
A
= 25°C
V
OUT
= 7V
f
SW
= 300kHz
WÜRTH INDUCTOR:
7443551200, L = 2.0µH, DCR = 2.6mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
V
IN
= 13V (PSM)
V
IN
= 16.5V (PSM)
V
IN
= 13V
V
IN
= 16.5V
08730-106
Figure 6. Efficiency—300 kHz, V
OUT
= 7 V
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
10 100 1k 10k 100k
EFFICIENCY (%)
LOAD CURRENT (mA)
T
A
= 25°C
V
OUT
= 0.8V
f
SW
= 600kHz
WÜRTH INDUCTOR:
744355147, L = 0.47µH, DCR = 0.67mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
V
IN
= 13V (PSM)
V
IN
= 16.5V
(PSM)
V
IN
= 13V
V
IN
= 16.5V
08730-107
Figure 7. Efficiency—600 kHz, V
OUT
= 0.8 V
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
10 100 1k 10k 100k
EFFICIENCY (%)
LOAD CURRENT (mA)
T
A
= 25°C
V
OUT
= 1.8V
f
SW
= 600kHz
WÜRTH INDUCTOR:
744325072, L = 0.72µH, DCR = 1.3mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
V
IN
= 13V (PSM)
V
IN
= 16.5V (PSM)
V
IN
= 13V
V
IN
= 16.5V
08730-108
Figure 8. Efficiency—600 kHz, V
OUT
= 1.8 V
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
10 100 1k 10k 100k
EFFICIENCY (%)
LOAD CURRENT (mA)
T
A
= 25°C
V
OUT
= 5V
f
SW
= 600kHz
WÜRTH INDUCTOR:
744318180, L = 1.4µH, DCR = 3.2mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
V
IN
= 20V (PSM)
V
IN
= 13V (PSM)
V
IN
= 16.5V (PSM)
V
IN
= 20V
V
IN
= 16.5V
08730-109
Figure 9. Efficiency—600 kHz, V
OUT
= 5 V