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PDF BD9E302EFJ Data sheet ( Hoja de datos )
| Número de pieza | BD9E302EFJ | |
| Descripción | Single Synchronous Buck DC/DC Converter | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
7.0V〜28V Input, 3A Integrated MOSFET
Single Synchronous Buck DC/DC Converter
BD9E302EFJ
General Description
BD9E302EFJ is a synchronous buck switching regulator
with built-in power MOSFETs. High efficiency at light load
with a SLLMTM (Simple Light Load Mode). It is most
suitable for use in the equipment to reduce the standby
power is required. It is a current mode control DC/DC
converter and features high-speed transient response.
Phase compensation can also be set easily.
Key Specifications
Input voltage range:
7.0V to 28V
Output voltage range:
1.0V to VIN x 0.7V
Output current:
3.0 A (Max)
Switching frequency:
550 kHz (Typ)
High-Side MOSFET on-resistance: 90 mΩ (Typ)
Low-Side MOSFET on-resistance: 70 mΩ (Typ)
Shutdown current:
0 μA (Typ)
Features
Synchronous single DC/DC converter
SLLMTM control (Simple Light Load Mode)
Over current protection
Short circuit protection
Thermal shutdown protection
Under voltage lockout protection
Soft start
Reduce external diode
HTSOP-J8 package
Package
HTSOP-J8
W (Typ) x D (Typ) x H (Max)
4.90 mm x 6.00 mm x 1.00 mm
Applications
Consumer applications such as home appliance
Secondary power supply and Adapter equipment
Telecommunication devices
HTSOP-J8
Typical Application Circuit
Figure 1. Application circuit
○Product structure：Silicon monolithic integrated circuit.
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed for protection against radioactive rays.
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BD9E302EFJ
Datasheet
Absolute Maximum Ratings (Ta = 25C)
Parameter
Symbol
Rating
Unit
Supply Voltage
VIN
-0.3 to +30
V
EN Input Voltage
VEN -0.3 to VIN V
Voltage from GND to BOOT
VBOOT
-0.3 to +35
V
Voltage from SW to BOOT
⊿VBOOT
-0.3 to +7
V
FB Input Voltage
VFB
-0.3 to +7
V
COMP Input Voltage
VCOMP
-0.3 to +7
V
SW Input Voltage
VSW
-0.5 to VIN +0.3
V
Operating Ambient Temperature Range
Topr
-40 to +85
C
Storage Temperature Range
Tstg
-55 to +150
C
Caution1: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over
the absolute maximum ratings.
Thermal Resistance(Note 1)
Parameter
Symbol
Thermal Resistance (Typ)
1s(Note 3)
2s2p(Note 4)
Unit
HTSOP-J8
Junction to Ambient
θJA 206.4
45.2 °C/W
Junction to Top Characterization Parameter(Note 2)
ΨJT 21
13 °C/W
(Note 1)Based on JESD51-2A(Still-Air)
(Note 2)The thermal characterization parameter to report the difference between junction temperature and the temperature at the top center of the outside
surface of the component package.
(Note 3)Using a PCB board based on JESD51-3.
Layer Number of
Measurement Board
Material
Board Size
Single
FR-4
114.3mm x 76.2mm x 1.57mmt
Top
Copper Pattern
Footprints and Traces
Thickness
70μm
(Note 4)Using a PCB board based on JESD51-5, 7.
Layer Number of
Measurement Board
Material
4 Layers
FR-4
Board Size
114.3mm x 76.2mm x 1.6mmt
Top 2 Internal Layers
Copper Pattern
Thickness
Copper Pattern
Thickness
Footprints and Traces
70μm
74.2mm x 74.2mm
35μm
(Note 5) This thermal via connects with the copper pattern of all layers..
Thermal Via(NOTE 5)
Pitch
Diameter
1.20mm
Φ0.30mm
Bottom
Copper Pattern
74.2mm x 74.2mm
Thickness
70μm
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111•15•001
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5 Page 
BD9E302EFJ
Typical Performance Curves (Application)
Datasheet
VIN=10V/div
EN=10V/div
VOUT=5V/div
SW=10V/div
Time=2ms/div
Time=2ms/div
VIN=10V/div
EN=10V/div
VOUT=5V/div
SW=10V/div
Figure 17. Power Up (VIN = EN)
Figure 18. Power Down (VIN = EN)
VIN=10V/div
EN=5V/div
VOUT=5V/div
SW=10V/div
Time=1ms/div
Figure 19. Power Up (EN = 0V→5V,Io=3A)
Time=200us/div
VIN=10V/div
EN=5V/div
VOUT=5V/div
SW=10V/div
Figure 20. Power Down (EN = 5V→0V,Io=3A)
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111•15•001
11/41
TSZ02201-0J3J0AJ00890-1-2
27.Apr.2016 Rev.002
11 Page | ||
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