BD9C301FJ-LB Datasheet, PDF (2/22 Pages) Rohm – 4.5V to 18V Input, 3.0A Integrated MOSFET Single Synchronous Buck DC/DC Converter

BD9C301FJ-LB
Pin Configuration
(TOP VIEW)
PGND ¹
VIN 2
AGND ³
FB 4
8 SW
7 SW
6 EN
5 COMP
Figure 2. Pin Assignment
Pin Descriptions
Pin No. Pin Name
Function
1
PGND Ground pins for the output stage of the switching regulator.
2
VIN
This pins supply power to the control circuit and the output stage of the switching regulator.
Connecting a 10 µF and a 0.1µF ceramic capacitor is recommended.
3
AGND Ground pin for the control circuit.
4
FB
An inverting input node for the gm error amplifier.
See page 13 for how to calculate the resistance of the output voltage setting.
An input pin for the switch current comparator and an output pin for the gm error amplifier. Connect a
5
COMP frequency phase compensation component to this pin.
See page 13 for how to calculate the resistance and capacitance for phase compensation.
6
EN
Turning this pin signal low (0.8 V or lower) forces the device to enter the shutdown mode. Turning this
pin signal high (2.0 V or higher) enables the device. This pin must be terminated.
7
SW
Switch nodes. These pins are connected to the drain of Pch MOSFET and the drain of Nch MOSFET.
8
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21.Feb.2014 Rev.002