BD9A301MUV-LB Datasheet, PDF (2/35 Pages) Rohm – This is the product guarantees long time support in Industrial market

BD9A301MUV-LB
Pin Configuration
(TOP VIEW)
16 15 14 13
PVIN 1
PVIN 2
PGND 3
PGND 4
E-FPINad
12 SW
11 SW
10 SW
9 SS
5
6
7
8
Datasheet
Figure 2. Pin Configuration
Pin Descriptions
Pin No.
1, 2
3, 4
5
6
7
8
9
10, 11, 12
13
14
15
16
-
Pin Name
PVIN
PGND
AGND
FB
ITH
MODE
SS
SW
BOOT
PGD
EN
AVIN
E-Pad
Function
Power supply terminals for the switching regulator.
These terminals supply power to the output stage of the switching regulator.
Connecting a 10µF ceramic capacitor is recommended.
Ground terminals for the output stage of the switching regulator.
Ground terminal for the control circuit.
An inverting input node for the gm error amplifier.
See page 23 for how to calculate the resistance of the output voltage setting.
An 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 24 for how to calculate the resistance and capacitance for phase compensation.
Turning this terminal signal Low (0.2V or lower) forces the device to operate in the fixed
frequency PWM mode. Turning this terminal signal High (0.8V or higher) enables the SLLM
control and the mode is automatically switched between the SLLM control and fixed frequency
PWM mode.
Terminal for setting the soft start time. The rise time of the output voltage can be specified by
connecting a capacitor to this terminal. See page 23 for how to calculate the capacitance.
Switch nodes. These terminals are connected to the source of the high-side MOSFET and drain
of the low-side MOSFET. Connect a bootstrap capacitor of 0.1µF between these terminals and
BOOT terminals. In addition, connect an inductor of 1.5µH considering the direct current
superimposition characteristic.
Connect a bootstrap capacitor of 0.1µF between this terminal and SW terminals.
The voltage of this capacitor is the gate drive voltage of the high-side MOSFET.
A “Power Good” terminal, an open drain output. Use of pull up resistor is needed. See page 18
for how to specify the resistance. When the FB terminal voltage reaches within ±7% of 0.8V
(Typ), the internal Nch MOSFET turns off and the output turns High.
Turning this terminal signal low (0.8V or lower) forces the device to enter the shutdown mode.
Turning this terminal signal high (2.0V or higher) enables the device. This terminal must be
terminated.
Supplies power to the control circuit of the switching regulator.
Connecting a 0.1µF ceramic capacitor is recommended.
A backside heat dissipation pad. Connecting to the internal PCB ground plane by using multiple
vias provides excellent heat dissipation characteristics.
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TSZ02201-0J3J0AJ00680-1-2
20.Aug.2014 Rev.001