B1077AS-4R7N AD [Analog Devices], B1077AS-4R7N Datasheet - Page 25

• Manufacturer Part Number: B1077AS-4R7N
• Description: 1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator
• Manufacturer: AD [Analog Devices]

Figure 55. ADP2301—1.4 MHz Typical Application, V
Figure 56. ADP2301—1.4 MHz Typical Application, V
Figure 57. ADP2301—1.4 MHz Typical Application, V
Figure 58. ADP2301—1.4 MHz Typical Application, V
V
10µF
IN
25V
V
C1
V
= 5V
IN
V
V
IN
IN
IN
Figure 54. ADP2301—1.4 MHz Typical Application, V
= 12V
OFF
= 12V
C1
10µF
25V
= 18V
= 9V
100kΩ
OFF
C1
10µF
25V
OFF
OFF
C1
10µF
25V
C1
10µF
25V
100kΩ
10.2kΩ
ON
5%
R3
100kΩ
100kΩ
56kΩ
ON
5%
R3
1%
1%
R3
R4
ON
ON
5%
5%
R3
R3
(with Programmable 7.8 V Start-Up Input Voltage)
VIN
EN
VIN
EN
VIN
EN
VIN
EN
VIN
EN
ADP2301
(1.4MHz)
ADP2301
ADP2301
(1.4MHz)
ADP2301
ADP2301
GND
(1.4MHz)
(1.4MHz)
(1.4MHz)
GND
Rev. 0 | Page 25 of 28
GND
GND
GND
BST
SW
FB
BST
BST
SW
FB
BST
BST
SW
FB
SW
SW
FB
IN
IN
FB
IN
IN
= 12 V, V
= 18 V, V
= 9 V, V
= 5 V, V
C4
0.1µF
6.3V
D1
B230A
C3
0.1µF
6.3V
D1
B230A
C3
0.1µF
6.3V
B230A
C3
0.1µF
6.3V
C3
0.1µF
6.3V
D1
B230A
D1
B230A
OUT
OUT
D1
OUT
OUT
IN
2.2µH
2.0A
4.7µH
= 3.3 V/1.2 A with External Enabling
= 1.8 V/1.2 A with External Enabling
L1
= 12 V, V
= 5.0 V/1.2 A with External Enabling
= 5.0 V/1.2 A with External Enabling
2.0V
4.7µH
L1
2.0A
6.8µH
4.7µH
L1
2.0A
2.0A
12.7kΩ
10.2kΩ
L1
L1
52.3kΩ
31.6kΩ
10.2kΩ
1%
1%
52.3kΩ
10.2kΩ
31.6kΩ
10.2kΩ
R1
R2
10kΩ
1%
1%
OUT
R1
R2
1%
1%
R1
R2
1%
1%
1%
1%
R1
R2
R1
R2
V
OUT
= 3.3 V/1.2 A
1.2A
V
V
V
V
OUT
OUT
= 1.8V
C2
22µF
6.3V
OUT
OUT
1.2A
1.2A
1.2A
1.2A
= 5.0V
= 3.3V
= 3.3V
= 5V
C2
10µF
6.3V
C2
22µF
6.3V
C2
10µF
6.3V
C2
22µF
6.3V
C3
22µF
6.3V
ADP2300/ADP2301