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Rohm Semiconductor Electronic Components Datasheet

BD9C301FJ-LB Datasheet

3.0A Integrated MOSFET / Single Synchronous Buck DC/DC Converter

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Datasheet
4.5V to 18V Input, 3.0A Integrated MOSFET
Single Synchronous Buck DC/DC Converter
BD9C301FJ-LB
General Description
This is the product guarantees long time support in
Industrial market. BD9C301FJ-LB is a synchronous buck
switching regulator with built-in low on-resistance power
MOSFETs. With wide input voltage range, it is capable of
providing current of up to 3 A. It is a current mode control
DC/DC converter and features high-speed transient
response. Phase compensation can also be set easily.
Features
Long Time Support Product for Industrial
Applications.
Synchronous Single DC/DC Converter
Over Current Protection
Thermal Shutdown Protection
Under Voltage Lockout Protection
Short Circuit Protection
Fixed Soft Start Function
Applications
Industrial Equipment
LCD TVs
Set-top Boxes
DVD/Blu-ray Disc Players/Recorders
Broadband Network and Communication Interface
Entertainment Devices
Key Specifications
Input Voltage Range:
Reference Voltage:
Maximum Output Current:
Switching Frequency:
Pch MOSFET On Resistance:
Nch MOSFET On Resistance:
Standby Current:
4.5V to 18.0V
0.8V ± 1%
3A(Max)
500kHz(Typ)
85mΩ(Typ)
50mΩ(Typ)
1μA (Typ)
Package
SOP-J8
W(Typ) x D(Typ) x H(Max)
4.90mm x 6.00mm x 1.65mm
SOP-J8
Typical Application Circuit
VIN
12V
10µF
Enable
VIN
0.1µF
EN
COMP AGND
SW
PGND FB
4.7µH
VOUT
3.3V
22µF×2
Figure 1. Application Circuit
Product structure: silicon monolithic integrated circuit This product has no protection against radioactive rays
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
1/4
TSZ02201-0J3J0AJ00540-1-2
26.JUN.2018 Rev.004


Rohm Semiconductor Electronic Components Datasheet

BD9C301FJ-LB Datasheet

3.0A Integrated MOSFET / Single Synchronous Buck DC/DC Converter

No Preview Available !

BD9C301FJ-LB
Pin Configuration
PGND 1
VIN 2
AGND 3
FB 4
(TOP VIEW)
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 14 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 14 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
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
2/20
TSZ02201-0J3J0AJ00540-1-2
26.JUN.2018 Rev.004


Part Number BD9C301FJ-LB
Description 3.0A Integrated MOSFET / Single Synchronous Buck DC/DC Converter
Maker ROHM
Total Page 24 Pages
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