B1077AS-4R7N AD [Analog Devices], B1077AS-4R7N Datasheet - Page 13

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

FUNCTIONAL BLOCK DIAGRAM
OFF
ON
EN
FB
4
3
SHUTDOWN
THERMAL
1.20V
0.90V
1.2µA
0.8V
OVP
220kΩ
90pF
SHUTDOWN
LOGIC
V
BIAS
0.7pF
0.5V
SHUTDOWN IC
Figure 41. ADP2300/ADP2301 Functional Block Diagram
= 1.1V
V
UVLO
IN
OCP
GENERATOR
RAMP
V
5
FB
Rev. 0 | Page 13 of 28
250mV/A
VIN
FREQUENCY FOLDBACK
(
f
SW
REGULATOR
GENERATOR
, ½
ADP2300/ADP2301
BOOT
R
S
CLK
f
SW
Q
, ¼
f
SW
)
1
6
2
BST
SW
GND
ADP2300/ADP2301
V
OUT