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ADP1879(RevA) Просмотр технического описания (PDF) - Analog Devices

Номер в каталоге
Компоненты Описание
производитель
ADP1879
(Rev.:RevA)
Synchronous Buck Controller with Constant On Time and Valley Current Mode
ADI
Analog Devices ADI
ADP1879 Datasheet PDF : 40 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
100
95
90
85 VIN = 13V (PSM)
80
75
70
65
60
55
50
45
40
35
30
VIN = 16.5V (PSM)
25
20
15
10
5
0
10
100
VIN = 16.5V
VIN = 13V
TA = 25°C
fVSOWUT=
= 0.8V
300kHz
WÜRTH INDUCTOR:
744325072, L = 0.72µH, DCR = 1.3mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
1k
10k
100k
LOAD CURRENT (mA)
Figure 4. Efficiency—300 kHz, VOUT = 0.8 V
100
95
90
VIN = 5V (PSM)
85
80
75
70
65
60
VIN = 13V (PSM)
VIN = 16.5V
55
50
VIN = 13V
45
40 VIN = 16.5V (PSM)
35
30
25
20
15
10
5
TA = 25°C
fVSOWUT=
= 1.8V
300kHz
WÜRTH INDUCTOR:
744325120, L = 1.2µH, DCR = 1.8mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
0
10
100
1k
10k
100k
LOAD CURRENT (mA)
Figure 5. Efficiency—300 kHz, VOUT = 1.8 V
100
95
VIN = 16.5V (PSM)
90
85
80
75
70
VIN = 13V (PSM)
65
60
55
50
45
40
35
30
25
20
15
10
5
0
10
100
VIN = 13V
VIN = 16.5V
TA = 25°C
fVSOWUT=
= 7V
300kHz
WÜRTH INDUCTOR:
7443551200, L = 2.0µH, DCR = 2.6mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
1k
10k
LOAD CURRENT (mA)
100k
Figure 6. Efficiency—300 kHz, VOUT = 7 V
ADP1878/ADP1879
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
10
VIN = 13V
VIN = 13V (PSM)
VIN = 16.5V
VIN = 16.5V
(PSM)
TA = 25°C
fVSOWUT=
= 0.8V
600kHz
WÜRTH INDUCTOR:
744355147, L = 0.47µH, DCR = 0.67mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
100
1k
10k
LOAD CURRENT (mA)
100k
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
0
10
VIN = 13V
VIN = 13V (PSM)
VIN = 16.5V (PSM)
VIN = 16.5V
TA = 25°C
fVSOWUT=
= 1.8V
600kHz
WÜRTH INDUCTOR:
744325072, L = 0.72µH, DCR = 1.3mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
100
1k
10k
LOAD CURRENT (mA)
100k
Figure 8. Efficiency—600 kHz, VOUT = 1.8 V
100
95
VIN = 13V (PSM)
90
85
VIN = 16.5V (PSM)
80
75
70
65
60
VIN = 16.5V
55
50 VIN = 20V (PSM)
45
VIN = 20V
40
35
30
25
20
15
10
5
TA = 25°C
fVSOWUT=
= 5V
600kHz
WÜRTH INDUCTOR:
744318180, L = 1.4µH, DCR = 3.2mΩ
INFINEON FETs:
BSC042N03MS G (UPPER/LOWER)
0
10
100
1k
10k
100k
LOAD CURRENT (mA)
Figure 9. Efficiency—600 kHz, VOUT = 5 V
Rev. A | Page 7 of 40

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