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PDF BD9130EFJ Data sheet ( Hoja de datos )
| Número de pieza | BD9130EFJ | |
| Descripción | Output 2A or More High-efficiency Step-down Switching Regulator | |
| Fabricantes | ROHM Semiconductor | |
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Single-chip Type with Built-in FET Switching Regulator Series
Output 2A or More High-efficiency
Step-down Switching Regulator
with Built-in Power MOSFET
BD9130EFJ
No.09027EAT30
●Description
ROHM’s high efficiency step-down switching regulator BD9130EFJ is a power supply designed to produce a low voltage
including 1 volts from 5.5/3.3 volts power supply line. Offers high efficiency with our original pulse skip control technology
and synchronous rectifier. Employs a current mode control system to provide faster transient response to sudden change
in load.
●Features
1) Offers fast transient response with current mode PWM control system.
2) Offers highly efficiency for all load range with synchronous rectifier (Nch/Pch FET)
and SLLMTM(Simple Light Load Mode)
3) Incorporates soft-start function.
4) Incorporates thermal protection and ULVO functions.
5) Incorporates short-current protection circuit with time delay function.
6) Incorporates shutdown function
7) Employs small surface mount package : HTSOP-J8
●Use
Power supply for LSI including DSP, Micro computer and ASIC
●Absolute maximum ratings
Parameter
Power Supply Voltage
Symbol
VCC
PVCC
Rating
-0.3～+7 *1
-0.3～+7 *1
Unit
V
V
EN Voltage
VEN -0.3～+7 V
SW・ITH Voltage
SW Output Current
Power Dissipation 1
Power Dissipation 2
VSW, VITH
ISW
Pd1
Pd2
-0.3～+7
2.6 *1
0.5 *2
3.76 *3
V
A
W
W
Operating Temperature Range
Topr
-25～+105
℃
Storage Temperature Range
Tstg
-55～+150
℃
Maximum Junction Temperature
Tjmax
+150
℃
*1 Pd, ASO, and Tjmax=150℃ should not be exceeded.
*2 Reduced by 4.0mW for increase in Ta of 1℃ above 25℃.
*3 Reduced by 30.0mW for increase in Ta of 1℃ above 25℃. (when mounted on a board 70.0mm × 70.0mm × 1.6mm Glass-epoxy PCB)
●Operating Conditions (Ta=-25～+105℃)
Parameter
Symbol
Power Supply Voltage
VCC
PVCC
EN Voltage
VEN
Output Voltage range
VOUT
SW Average Output Current
ISW
＊4 In case set output voltage 1.6V or more, VccMin. = Vout + 1.3V.
＊5 Pd and ASO should not be exceeded.
Min.
2.7
2.7
0
1.0
-
Limits
Typ.
3.3
3.3
-
-
-
Max.
5.5
5.5
VCC
2.5*4
2.0*5
Unit
V
V
V
V
A
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
1/14
2009.05 - Rev.A
Free Datasheet http://www.datasheet4u.com/
1 page  
BD9130EFJ
Technical Note
●Information on advantages
Advantage 1：Offers fast transient response with current mode control system.
Conventional product (Load response IO=0.1A→0.6A)
BD9130EFJ (Load response IO=1A→2A)
VOUT
110mV
VOUT
29mV
IOUT
IOUT
Voltage drop due to sudden change in load was reduced by about 50%.
Fig.18 Comparison of transient response
Advantage 2： Offers high efficiency for all load range.
・For lighter load:
Utilizes the current mode control mode called SLLMTM for lighter load, which reduces various dissipation such as
switching dissipation (PSW), gate charge/discharge dissipation, ESR dissipation of output capacitor (PESR) and
on-resistance dissipation (PRON) that may otherwise cause degradation in efficiency for lighter load.
Achieves efficiency improvement for lighter load.
・For heavier load:
Utilizes the synchronous rectifying mode and the low on-resistance
MOS FETs incorporated as power transistor.
ON resistance of P-channel MOS FET : 200mΩ(Typ.)
ON resistance of N-channel MOS FET : 160mΩ(Typ.)
100
SLLMTM
②
50 ① PWM
①inprovement by SLLM system
②improvement by synchronous rectifier
0
0.001 0.01
0.1
1
Output current Io[A]
Achieves efficiency improvement for heavier load.
Offers high efficiency for all load range with the improvements mentioned above.
Fig.19 Efficiency
Advantage 3：・Supplied in smaller package due to small-sized power MOS FET incorporated.
・Output capacitor Co required for current mode control: 22µF ceramic capacitor
・Inductance L required for the operating frequency of 1 MHz: 2.2µH inductor
(BD9130EFJ:Co=22µF, L=2.2µH)
Reduces a mounting area required.
RITH
CITH
VCC
DC/DC
Convertor
Controller
Cin
L VOUT
Co
15mm
10mm
RITH
CIN
CITH
CO
L
Fig.20 Example application
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
5/14
2009.05 - Rev.A
Free Datasheet http://www.datasheet4u.com/
5 Page 
BD9130EFJ
5. Determination of output voltage
The output voltage VOUT is determined by the equation (6):
VOUT=(R2/R1+1)×VADJ・・・(6) VADJ: Voltage at ADJ terminal (0.8V Typ.)
With R1 and R2 adjusted, the output voltage may be determined as required.
Adjustable output voltage range : 1.0V～2.5V
6
SW
1
ADJ
Technical Note
L
Co
Output
R2
R1
Use 1 kΩ～100 kΩ resistor for R1. If a resistor of the resistance
higher than 100 kΩ is used, check the assembled set carefully for
ripple voltage etc.
Fig.33 Determination of output voltage
3.9
3.7
The lower limit of input voltage depends on the output voltage.
Basically, it is recommended to use in the condition :
VCCmin = VOUT+1.3V.
Fig.34. shows the necessary output current value at the lower limit
of input voltage. (DCR of inductor : 0.1Ω)
This data is the characteristic value, so it’ doesn’t guarantee the
operation range,
3.5
3.3
Vo=2.5V
3.1
Vo=1.8V
Vo=2.0V
2.9
●BD9130EFJ Cautions on PC Board layout
2.7
0
0.5 1 1.5
OUT PUT CURRENT : IOUT[A]
Fig.34 minimum input voltage
in each output voltage
2
R2
R1
RITH
③
CITH
1 ADJ
2
VCC
3 ITH
4
GND
VCC
EN 8
7
PVCC
SW 6
5
PGND
EN
L
CIN
②
Co
①
VOUT
GND
Fig.35 Layout diagram
① For the sections drawn with heavy line, use thick conductor pattern as short as possible.
② Lay out the input ceramic capacitor CIN closer to the pins PVCC and PGND, and the output capacitor Co closer to the
pin PGND.
③ Lay out CITH and RITH between the pins ITH and GND as neat as possible with least necessary wiring.
※ HTSOP-J8 (BD9130EFJ) has thermal FIN on the reverse of the package.
The package thermal performance may be enhanced by bonding the FIN to GND plane which take a large area of
PCB.
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
11/14
2009.05 - Rev.A
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
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| PDF Descargar | [ Datasheet BD9130EFJ.PDF ] | |
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