B1077AS-4R7N AD [Analog Devices], B1077AS-4R7N Datasheet - Page 5

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

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
Mnemonic
BST
GND
FB
EN
VIN
SW
Description
Boost Supply for the High-Side MOSFET Driver. A 0.1 μF capacitor is connected between the SW and BST pins
to form a floating supply to drive the gate of the MOSFET switch above the V
Ground. Connect this pin to the ground plane.
Feedback Voltage Sense Input. Connect this pin to a resistive divider from V
desired V
Output Enable. Pull this pin high to enable the output. Pull this pin low to disable the output. This pin can
also be used as a programmable UVLO input. This pin has a 1.2 μA pull-down current to GND.
Power Input. Connect to the input power source with a ceramic bypass capacitor to GND directly from this pin.
Switch Node Output. Connect an inductor to V
OUT
.
GND
BST
FB
Figure 3. Pin Configuration
1
2
3
Rev. 0 | Page 5 of 28
(Not to Scale)
ADP2300/
ADP2301
TOP VIEW
6
5
4
OUT
SW
VIN
EN
and a catch diode to GND from this pin.
OUT
IN
. Set the voltage to 0.8 V for a
supply voltage.
ADP2300/ADP2301