Data Sheet
ADP1878/ADP1879
TYPICAL PERFORMANCE CHARACTERISTICS
100
95
90
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
V
= 13V
IN
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
V
= 13V (PSM)
IN
V
= 13V (PSM)
IN
V
= 16.5V
IN
V
= 16.5V
IN
V
= 13V
IN
T
V
= 25°C
= 0.8V
= 300kHz
T = 25°C
A
V
= 16.5V (PSM)
A
IN
V
= 0.8V
= 600kHz
OUT
OUT
V
= 16.5V
(PSM)
IN
f
f
SW
SW
WÜRTH INDUCTOR:
744325072, L = 0.72µH, DCR = 1.3mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
WÜRTH INDUCTOR:
744355147, L = 0.47µH, DCR = 0.67mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
0
0
10
100
1k
10k
100k
100k
100k
10
100
1k
10k
100k
100k
100k
LOAD CURRENT (mA)
LOAD CURRENT (mA)
Figure 4. Efficiency—300 kHz, VOUT = 0.8 V
Figure 7. Efficiency—600 kHz, VOUT = 0.8 V
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
V
= 5V (PSM)
IN
V
= 13V
IN
V
= 13V (PSM)
IN
V
= 16.5V
IN
V
= 13V (PSM)
IN
V
= 13V
IN
V
= 16.5V
IN
V
= 16.5V (PSM)
IN
V
= 16.5V (PSM)
IN
T
V
= 25°C
= 1.8V
= 300kHz
T
= 25°C
A
= 1.8V
= 600kHz
A
V
f
OUT
OUT
f
SW
SW
WÜRTH INDUCTOR:
744325120, L = 1.2µH, DCR = 1.8mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
WÜRTH INDUCTOR:
744325072, L = 0.72µH, DCR = 1.3mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
0
10
0
10
100
1k
10k
100
1k
10k
LOAD CURRENT (mA)
LOAD CURRENT (mA)
Figure 5. Efficiency—300 kHz, VOUT = 1.8 V
Figure 8. Efficiency—600 kHz, VOUT = 1.8 V
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
V
= 16.5V (PSM)
V
= 13V (PSM)
IN
IN
V
= 16.5V (PSM)
IN
V
= 13V (PSM)
IN
V
= 13V
IN
V
= 16.5V
IN
V
= 16.5V
IN
V
= 20V (PSM)
IN
V
= 20V
IN
T
V
= 25°C
= 7V
= 300kHz
T = 25°C
A
A
V
= 5V
= 600kHz
OUT
OUT
f
f
SW
SW
WÜRTH INDUCTOR:
7443551200, L = 2.0µH, DCR = 2.6mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
WÜRTH INDUCTOR:
744318180, L = 1.4µH, DCR = 3.2mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
0
10
0
10
100
1k
LOAD CURRENT (mA)
10k
100
1k
10k
LOAD CURRENT (mA)
Figure 6. Efficiency—300 kHz, VOUT = 7 V
Figure 9. Efficiency—600 kHz, VOUT = 5 V
Rev. A | Page 7 of 40