BD9E302EFJ Datasheet, PDF (2/44 Pages) Rohm – Integrated MOSFET Single Synchronous Buck DC/DC Converter

BD9E302EFJ
 Pin Configuration
BOOT ¹
VIN 2
EN ³
AGND 4
(TOP VIEW)
E-Pad
8 SW
7 PGND
6 COMP
5 FB
Figure 2. Pin assignment
Datasheet
 Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
-
Pin Name
BOOT
VIN
EN
AGND
FB
COMP
PGND
SW
E-Pad
Description
Connect a bootstrap capacitor of 0.1 µF between this terminal and SW terminal.
The voltage of this capacitor is the gate drive voltage of the high-side MOSFET.
Power supply terminal for the switching regulator and control circuit.
Connecting 10 µF+0.1µF ceramic capacitor is recommended.
Turning this terminal signal low-level (0.8 V or lower) forces the device to enter the
shutdown mode. Turning this terminal signal high-level (2.5 V or higher) enables the
device. This terminal must be terminated.
Ground terminal for the control circuit.
Inverting input node for the gm error amplifier.
See page 30 for how to calculate the resistance of the output voltage setting.
Input terminal for the gm error amplifier output and the output switch current comparator.
Connect a frequency phase compensation component to this terminal.
See page 33 for how to calculate the resistance and capacitance for phase
compensation.
Ground terminal for the output stage of the switching regulator.
Switch node. This terminal is connected to the source of the high-side MOSFET and
drain of the low-side MOSFET. Connect a bootstrap capacitor of 0.1 µF between these
terminals and BOOT terminals. In addition, connect an inductor considering the direct
current superimposition characteristic.
Exposed pad. Connecting this to the internal PCB ground plane using multiple vias
provides excellent heat dissipation characteristics.
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TSZ02201-0J3J0AJ00890-1-2
27.Apr.2016 Rev.002