BD9E301EFJ-LB 반도체 회로 부품 판매점
Single Synchronous Buck DC/DC Converter
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 ROHM Semiconductor |
Datasheet
7.0V to 36V Input, 2.5A Integrated MOSFET
Single Synchronous Buck DC/DC Converter
BD9E301EFJ-LB
General Description
This is the product guarantees long time support in
Industrial market.
BD9E301EFJ-LB is a synchronous buck switching regulator
with built-in power MOSFETs. It is capable of an output
current of up to 2.5A. 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.
Undervoltage 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×0.7V
Output Current:
2.5A (Max)
Switching Frequency:
570kHz (Typ)
High-Side MOSFET ON-Resistance: 170mΩ (Typ)
Low-Side MOSFET ON-Resistance: 140mΩ (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
Enable
2 VIN
BD9E301EFJ-LB BOOT 1
3 EN
COMP
6
AGND
4
PGND
7
15kΩ
4700pF
SW 8
FB
5 12kΩ
3kΩ
0.1μF
6.8μH
VOUT
22μF×2
Figure 1. Application circuit
○Product structure：Silicon monolithic integrated circuit.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays.
1/30
TSZ02201-0J3J0AJ00380-1-2
14.May.2014 Rev.003
BD9E301EFJ-LB
Pin Configuration
BOOT 1
VIN 2
EN 3
AGND 4
(TOP VIEW)
E-Pad
8 SW
7 PGND
6 COMP
5 FB
Pin Description(s)
Pin No Pin Name
Figure 2. Pin assignment
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 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 22 on how to calculate the resistance of the output voltage setting.
Input terminal for the gm error amplifier output and the output switch current comparator.
6
COMP
Connect a frequency phase compensation component to this terminal.
See page 23 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.
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E-Pad
Exposed pad. Connecting this to the internal PCB ground plane using multiple vias
provides excellent heat dissipation characteristics.
www.rohm.co
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111•15•001
2/30
TSZ02201-0J3J0AJ00380-1-2
14.May.2014 Rev.003
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제조업체: ROHM Semiconductor
( rohm )
BD9E301EFJ-LB converter
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