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Rohm Semiconductor Electronic Components Datasheet

BD9E303EFJ-LB Datasheet

Single Synchronous Buck DC/DC Converter

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Datasheet
7.0V to 36V Input, 3.0A Integrated MOSFET
Single Synchronous Buck DC/DC Converter
BD9E303EFJ-LB
General Description
This is the product guarantees long time support in
Industrial market.BD9E303EFJ-LB is a synchronous buck
switching regulator with built-in power MOSFETs. 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.
Short Circuit Protection.
Thermal Shutdown Protection.
Under voltage Lockout Protection.
Soft Start.
HTSOP-J8 package (Exposed Pad).
Key Specifications
Input Voltage Range:
7.0V to 36V
Output Voltage Range:
1.0V to VIN×0.8V
Output Current:
3.0A (Max)
Switching Frequency:
300kHz (Typ)
High-Side MOSFET ON-Resistance: 90m(Typ)
Low-Side MOSFET ON-Resistance: 80m(Typ)
Standby Current:
0μA (Typ)
Package
HTSOP-J8
W (Typ) x D (Typ) x H (Max)
4.90mm x 6.00mm x 1.00mm
Applications
Industrial Equipment.
Power supply for FA’s industrial device using 24V
bass.
Consumer applications such as home appliance.
Distribution type power supply system for 12V, and
24V.
HTSOP-J8
Typical Application Circuit
VIN
24V
10μF
2 VIN
0.1μF
BD9E303EFJ-LB BOOT 1
SW 8
Enable
3 EN
COMP
6
AGND
4
PGND
7
6800pF
15kΩ
FB
5
30kΩ
7.5kΩ
0.1μF
10μH
VOUT
22μF×2
Figure 1. Application circuit
Product structureSilicon monolithic integrated circuit.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed for protection against radioactive rays.
1/28
TSZ02201-0J3J0AJ00650-1-2
13.Feb.2015 Rev.002


Rohm Semiconductor Electronic Components Datasheet

BD9E303EFJ-LB Datasheet

Single Synchronous Buck DC/DC Converter

No Preview Available !

BD9E303EFJ-LB
Datasheet
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
Pin Description(s)
Pin No Pin Name
Description
1
BOOT
Connect a bootstrap capacitor of 0.1µF between this terminal and SW terminal.
The voltage of this capacitor is the gate drive voltage of the high-side MOSFET.
2
VIN
Power supply terminal for the switching regulator and control circuit.
Connecting a 10µF and 0.1µF ceramic capacitor is recommended.
Turning this terminal signal low-level (0.8V or lower) forces the device to enter the shut
3 EN down mode. Turning this terminal signal high-level (2.5V or higher) enables the device.
This terminal must be terminated.
4 AGND Ground terminal for the control circuit.
5
FB
Inverting input node for the gm error amplifier.
See page 18 on how to calculate the resistance of the output voltage setting.
Output of gm error amplifier, and input of PWM comparator. Connect phase
6 COMP compensation components to this pin. See page 20 on how to calculate the resistance
and capacitance for phase compensation.
7 PGND 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
8
SW
drain of the low-side MOSFET. Connect a bootstrap capacitor of 0.1µF between this
terminal and BOOT terminal. In addition, connect an inductor considering the direct
current superimposition characteristic.
-
E-Pad
Exposed pad. Connecting this to the internal PCB ground plane using multiple vias
provides excellent heat dissipation characteristics.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/28
TSZ02201-0J3J0AJ00650-1-2
13.Feb.2015 Rev.002


Part Number BD9E303EFJ-LB
Description Single Synchronous Buck DC/DC Converter
Maker Rohm
Total Page 30 Pages
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