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PDF BD9E303EFJ-LB Data sheet ( Hoja de datos )
| Número de pieza | BD9E303EFJ-LB | |
| Descripción | Single Synchronous Buck DC/DC Converter | |
| Fabricantes | ROHM Semiconductor | |
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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: 90mΩ (Typ)
Low-Side MOSFET ON-Resistance: 80mΩ (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 structure：Silicon monolithic integrated circuit.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed for protection against radioactive rays.
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1 page  
BD9E303EFJ-LB
Datasheet
Absolute Maximum Ratings (Ta = 25°C)
Parameter
Symbol
Rating
Unit
Supply Voltage
VIN
-0.3 to +40
V
EN Input Voltage
VEN
-0.3 to +40
V
Voltage from GND to BOOT
Voltage from SW to BOOT
VBOOT
∆VBOOT
-0.3 to +45
-0.3 to +7
V
V
FB Input Voltage
VFB
-0.3 to +7
V
COMP Input Voltage
VCOMP
-0.3 to +7
V
SW Input Voltage
Allowable Power Dissipation(Note 1)
VSW
Pd
-0.5 to VIN + 0.3
2.76 (Note 1)
V
W
Operating Junction Temperature Range
Tj
-40 to +150
C
Storage Temperature Range
Tstg
-55 to +150
C
(Note 1) HTSOP-J8:Derating in done 22mW/°C for operating Ta ≥ 25°C
(PCB size: 114.3 mm × 76.2 mm × 1.6 mm, copper foil area (on 2nd & 3rd layer and reverse side): 74.2 mm × 74.2 mm when mounted on 4-layer PCB)
Copper foil thickness: Front side and reverse side 70µm be used, 2nd & 3rd 35µm be used.
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.
Caution2: Reliability is decreased at junction temperature greater than 125C.
Recommended Operating Conditions (Ta= -40°C to +85°C)
Parameter
Supply Voltage
Symbol
VIN
Min
7.0
Rating
Typ
-
Max Unit
36 V
Output Current
IOUT
0
-
3A
Output Voltage Range
VRANGE
1.0 (Note 2)
-
VIN × 0.8
V
(Note 2) Please use it in output voltage setting of which output pulse width does not become 200nsec (Typ) or less. See the page 18 for how to calculate the
resistance of the output voltage setting.
Electrical Characteristics (Unless otherwise specified VIN=24V VEN=3V Ta=25°C)
Parameter
Symbol
Min
Limit
Typ
Max Unit
Conditions
Supply Current in Operating
IOPR
-
2.2
3.0
mA
VFB = 1.1V
No switching
Supply Current in Standby
ISTBY
-
0 10 µA VEN = 0V
Reference Voltage (TJ =25°C)
VFB
0.990 1.000 1.010
V
Reference Voltage (TJ =-40 to +150°C)
VFB
0.965 1.000 1.035
V
FB Input Current
IFB -1 0 1 µA VFB = 1.1V
Switching frequency
FOSC
255 300 345 kHz
Maximum Duty ratio
Maxduty
90
95
99 %
High-side FET on-resistance
RONH - 90 - mΩ ISW = 100mA
Low-side FET on-resistance
RONL - 80 - mΩ ISW = 100mA
Over Current limit
ILIMIT
- 5.2
-A
UVLO detection voltage
VUVLO 4.7 5.0 5.3 V VIN falling
UVLO hysteresis voltage
VUVLOHYS
1.2
1.4
1.6
V
EN high-level input voltage
VENH
2.5
-
VIN V
EN low-level input voltage
VENL
0
- 0.8 V
EN Input current
Soft Start time
● VFB : FB Input Voltage. VEN : EN Input Voltage.
● Pd should not be exceeded.
IEN
TSS
2.1 4.2 8.4 µA VEN = 3V
1.25
2.50
5.00
msec
EN rising to
FB=0.85V
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111•15•001
5/28
TSZ02201-0J3J0AJ00650-1-2
13.Feb.2015 Rev.002
5 Page 
BD9E303EFJ-LB
Typical Performance Curves - continued
Time=2μs/div
Datasheet
Time=2μs/div
SW=10V/div
VOUT=20mV/div
SW=10V/div
VOUT=20mV/div
Figure 23. VOUT Ripple
(VIN = 24V, VOUT = 5V, IOUT = 0A)
Figure 24. VOUT Ripple
(VIN = 24V, VOUT = 5V, IOUT = 3A)
VIN=200mV/div
SW=10V/div
Time=2μs/div
VIN=200mV/div
SW=10V/div
Time=2μs/div
Figure 25. VIN Ripple
(VIN = 24V, VOUT = 5V, IOUT = 0A)
Figure 26. VIN Ripple
(VIN = 24V, VOUT = 5V, IOUT = 3A)
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111•15•001
11/28
TSZ02201-0J3J0AJ00650-1-2
13.Feb.2015 Rev.002
11 Page | ||
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