BD8314NUV_11 [ROHM]
High-efficiency Step-up Switching Regulator with Built-in Power MOSFET; 高效率升压型开关稳压器具有内置功率MOSFET
| 型号： | BD8314NUV_11 |
| 厂家： | 
ROHM |
| 描述： | High-efficiency Step-up Switching Regulator with Built-in Power MOSFET |
| 文件： | 总16页 (文件大小：401K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Single-chip Type with Built-in FET Switching Regulators
High-efficiency Step-up
Switching Regulator
with Built-in Power MOSFET
BD8314NUV
No.11027EDT09
●Description
ROHM’s High-efficiency Step-up Switching Regulator Built-in Power MOSFET BD8314NUV generates step-up output
including 8 V or 10 V from 4 batteries, batteries such as Li1cell or Li2cell etc. or a 5 V fixed power supply line.
This IC allows easy production of small and a wide range of output current, and is equipped with an external coil/capacitor
downsized by high frequency operation of 1.2 MHz, built-in 2.5 A rated 80 mΩ Nch FET SW, and flexible phase
compensation system on board.
●Features
1) Incorporates Nch FET capable of withstanding 2.5 A/14 V.
2) Incorporates phase compensation device between input and output of ERROR AMP.
3) Small coils and capacitors to be used by high frequency operation of 1.2 MHz
4) Input voltage 3.0 V ~ 12 V
5) Output current
600 mA (3.5 V ~ 10 V) at 10 V
600 mA (3.0 V ~ 8 V) at 8 V
6) Incorporates soft-start function.
7) Incorporates timer latch system short protecting function.
8) As small as 3 mm×3 mm, SON 10-pin package VSON010V3030
●Application
General portable equipment like DSC/DVC powered by 4 dry batteries or Li2cell
●Absolute Maximum Ratings
Parameter
Symbol
VCC, LX
SWOUT, INV
Iinmax
Pd
Ratings
14
Unit
V
Maximum applied power voltage
Maximum input voltage
Maximum input current
Power dissipation
14
V
2.5
A
700*
mW
°C
°C
°C
Operating temperature range
Storage temperature range
Junction temperature
Topr
-25 to +85
-55 to +150
+150
Tstg
Tjmax
*
When used at Ta = 25°C or more installed on a 74.2 × 74.2 × 1.6t mm board, the rating is reduced by 5.6 mW/°C.
●Operating Conditions (Ta = 25°C)
Parameter
Symbol
VCC
Ratings
3.0 to 12
4.0 to 12
Unit
V
Power supply voltage
Output voltage
VOUT
V
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev.D
1/15
Technical Note
BD8314NUV
●Electrical Characteristics
(Unless otherwise specified, Ta = 25 °C, VCC = 7.4 V)
Limits
Typ.
Parameter
Symbol
Unit
Conditions
Min.
Max.
[Low voltage input malfunction preventing circuit]
Detection threshold voltage
Hysteresis range
[Oscillator]
VUV
-
2.4
2.6
V
VREG monitor
ΔVUVhy
50
100
200
mV
Oscillation frequency
[Regulator]
fosc
1.1
1.2
5.0
1.3
MHz
V
Output voltage
[ERROR AMP]
INV threshold voltage
Input bias current
Soft-start time
VREG
4.65
5.35
VINV
IINV
Tss
0.99
-50
1.00
0
1.01
50
V
nA
Vcc=11.0V , VINV=5.5V
5.3
8.8
12.2
msec
[PWM comparator]
LX Max Duty
Dmax1
77
-
85
50
93
%
[SWOUT]
ON resistance
[Output]
RONSWOUT
100
Ω
LX NMOS ON resistance
LX leak current
[STB]
RON
-
80
0
150
1
mΩ
Ileak
-1
µA
Operation
No-operation
VSTBH
VSTBL
RSTB
2.5
-0.3
250
-
-
VCC
0.3
V
V
STB pin
control voltage
STB pin pull-down resistance
[Circuit current]
400
700
kΩ
Standby current VCC
ISTB
Icc
-
-
-
1
µA
µA
Circuit current at operation VCC
600
900
VINV=1.2V
Not designed to be resistant to radiation
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev.D
2/15
Technical Note
BD8314NUV
●Description of Pins
Pin No. Pin Name
Function
Ground terminal
1
2
GND
VCC
SWOUT
INV
GND
VCC
Control part power input terminal
5 V output terminal of regulator
for internal circuit
3
VREG
Lx
VREG
LX
STB
4～5
6～7
8
Coil connecting terminal
Power transistor ground terminal
ON/OFF terminal
PGND
PGND
PGND
STB
LX
9
INV
ERROR AMP input terminal
STBSW for split resistance
Fig.1 Pin layout
10
SWOUT
●Block Diagram
VREG
STB
VCC
UVLO
Reference
5V REG
STBY_IO
VREG
VREF
FB H
OSC
1.2MHz
Lx
SCP
GND
OSC×16000 count
VREG
STOP
PRE
DRIVER
PWM
CONTROL
80mΩ
PGND
ERROR_AMP
VREF
Soft
Start
SWOUT
STB
50Ω
INV
Fig.2 Block diagram
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev.D
3/15
Technical Note
BD8314NUV
●Description of Blocks
1. VREF
This block generates ERROR AMP reference voltage.
The reference voltage is 1.0 V.
2. UVLO
Circuit for preventing low voltage malfunction
Prevents malfunction of the internal circuit at activation of the power supply voltage or at low power supply voltage.
Monitors VREG pin voltage to turn off all output FET and DC/DC converter output when VREG voltage is lower than
2.4 V, and reset the timer latch of the internal SCP circuit and soft-start circuit. This threshold contains 100 mV
hysteresis.
3. SCP
Timer latch system short-circuit protection circuit
When the INV pin is the set 1.0 V or lower voltage, the internal SCP circuit starts counting. The internal counter is in
synch with OSC; the latch circuit activates after a lapse of 13.3 msec after the counter counts about 16000 oscillations
and then, turn off DC/DC converter output. To reset the latch circuit, turn off the STB pin once. Then, turn it on again or
turn on the power supply voltage again.
4. OSC
Circuit for oscillating saw tooth waves with an operation frequency fixed at 1.2 MHz
5. ERROR AMP
Error amplifier for detecting output signals and outputting PWM control signals
The internal reference voltage is set at 1.0 V.
A primary phase compensation device of 200 pF, 62 kΩ is built in between the inverting input terminal and the output
terminal of this ERROR AMP.
6. PWM COMP
Voltage-pulse width converter for controlling output voltage corresponding to input voltage
Comparing the internal SLOPE waveform with the ERROR AMP output voltage, PWM COMP controls the pulse width
to the output to the driver.
Max Duty is set at 85%.
7. SOFT START
Circuit for preventing in-rush current at startup by bringing the output voltage of the DC/DC converter into a soft-start
Soft-start time is in synch with the internal OSC, and the output voltage of the DC/DC converter reaches the set voltage
after about 10000 oscillations.
8. PRE DRIVER
CMOS inverter circuit for driving the built-in Nch FET.
9. STBY_IO
Voltage applied on STB pin (8 pin) to control ON/OFF of IC
Turned ON when a voltage of 2.5 V or higher is applied and turned OFF when the terminal is open or 0 V is applied.
Incorporates approximately 400 kΩ pull-down resistance.
10. Nch FET SW
Built-in SW for switching the coil current of the DC/DC converter. Incorporates an 80 mΩ NchFET SW capable of
withstanding 14 V. Since the current rating of this FET is 2.5 A, it should be used within 2.5 A including the DC current
and ripple current of the coil.
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev.D
4/15
Technical Note
BD8314NUV
●Reference Data (Unless otherwise specified, Ta = 25°C, VCC = 7.4 V)
1.02
1.01
1.00
0.99
0.98
1.02
1.01
1.00
0.99
0.98
5.3
5.2
5.1
5.0
4.9
4.8
4.7
0
5
10
-40 -20
0
20 40 60 80 100 120
-40
0
40
80
120
VCC [V]
℃
TEMPERATURE [
]
TEMPERATURE [
]
℃
Fig.4. INV threshold
power supply property
Fig.5. VREG output
temperature property
Fig.3. INV threshold
temperature property
1.4
1.3
1.2
1.1
1.0
8
7
6
5
4
3
2
1
0
1.4
1.3
1.2
1.1
1.0
0
2
4
6
8
10
12
14
-40
0
40
80
120
3
6
9
12
15
VCC [V]
TEMPERATURE [
]
VCC [V]
℃
Fig.7. fosc
temperature property
Fig.6. VREG output
power supply property
Fig.8. fosc
voltage property
160
140
120
100
80
120
100
80
60
40
20
0
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
0.25
0.20
0.15
0.10
0.05
0.00
ID=500mA
UVLO release
ID=500mA
Hysteresis width
UVLO detection
60
40
20
0
-40
0
40
80
120
3
6
9
12
15
-40 -20
0
25 50 85 100 120
VCC [V]
TEMPARATURE [
]
℃
TEMPARATURE [
]
℃
Fig.10. Nch FET ON
resistance temperature property
Fig.11. Nch FET ON
resistance power supply property
Fig.9. UVLO threshold
temperature property
100
2.5
2.0
1.5
1.0
100
ID=1mA
ID=1mA
80
60
40
20
0
80
60
40
20
0
ON
OFF
-50
0
50
VCC [V]
100
150
-40
0 40
TEMPARATURE [
80
]
120
3
6
9
12
15
VCC [V]
℃
Fig.12. STB threshold
temperature property
Fig.13. SWOUT ON resistance
temperature property
Fig.14. SWOUT ON resistance
power supply property
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev.D
5/15
Technical Note
BD8314NUV
95
90
85
80
75
95
90
85
80
75
2.5
2.0
1.5
1.0
3
6
9
12
15
-50
0
50
100
150
-40
0
40
80
120
VCC [V]
VCC [V]
TEMPARATURE [
]
℃
Fig.16. Lx Max duty
power supply property
Fig.15. Lx Max duty
temperature property
Fig.17. Circuit current
temperature property
1000
800
600
400
200
0
0
2
4
6
8
10
12
14
VCC [V]
Fig.18. Circuit current
power supply property
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2011.08 - Rev.D
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Technical Note
BD8314NUV
●Example of Application Input: 3.0 to 10 V, output: 10 V / 500 mA
RSX201L-30 (ROHM)
10V/500mA
22μF
GRM32EB31C226KE16 (Murata)
4.7μH
DE3518E(TOKO)
PGND
6
Lx
Lx
5
VBAT=2.5～4.5V
PGND
STB
10p
4
3
2
7
8
9
10μF
GRM31CB31E106KA75L(Murata)
1μF
GRM188B11A105KA61(Murata)
VREG
VCC
ON/OFF
200k
10k
INV
100k
1μF
GRM21BB11C105KA01(Murata)
22k
3.3～5.0V
SWOUT
GND
1
10
Fig.19 Reference application diagram
●Reference Application Data 1
100
100
100
VCC=10V
VCC=4.0V
80
60
40
20
0
VCC=6.0V
80
80
60
60
VCC=7.4V
VCC=3.5V
VCC=8.4V
VCC=4.8V
40
40
20
0
20
0
1
10
100
1000
10000
1
10
100
1000
10000
1
10
100
1000
10000
OUTPUT CURRENT [mA]
OUTPUT CURRENT [mA]
OUTPUT CURRENT [mA]
Fig.20 Power conversion efficiency 1
Fig.21 Power conversion efficiency 2
Fig.22 Power conversion efficiency 3
10.5
10.4
10.5
10.4
10.3
15
14
13
10.3
VCC=10V
10.2
10.2
10.1
10.0
9.9
12
Io=100mA
VCC=4.8V
VCC=8.4V
10.1
10.0
11
10
9
9.9
VCC=4.0V
VCC=3.5V
VCC=7.4V
9.8
9.8
8
Io=500mA
VCC=6.0V
9.7
9.7
7
6
5
9.6
9.5
9.6
9.5
1
10
100
1000
10000
1
10
100
1000
10000
0
2
4
6
8
10
12
OUTPUT CURRENT [mA]
OUTPUT CURRENT [mA]
INPUT VOLTAGE [V]
Fig.23 Line regulation
Fig.25 Load regulation 2
Fig.24 Load regulation 1
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev.D
7/15
Technical Note
BD8314NUV
●Reference Application Data 2 (VCC = 3.0 V, 6.0 V, 8.4 V, VOUT = 10 V)
60
40
180
120
60
60
40
180
60
40
180
120
60
Phase
Phase
120
Phase
20
20
60
0
20
0
0
0
0
0
Gain
Gain
Gain
-20
-40
-60
-60
-120
-180
-20
-40
-60
-60
-20
-40
-60
-60
-120
-180
-120
-180
100
1k
10k
100k
1M
ꢀꢀ
100
ꢀꢀ
1
1k
10k
100k
1M
100
100
1000
1k
10000
10k
100000 1000000
100k 1M
ꢀꢀ
Frequency [Hz]
Frequency [Hz]
Frequency [Hz]
Fig.26 Frequency response property 1
(VCC = 3.0 V, Io = 200 mA)
Fig.27 Frequency response property 2
(VCC = 6.0 V, Io = 200 mA)
Fig.28 Frequency response property 3
(VCC = 8.4 V, Io = 200 mA)
60
40
180
120
60
60
40
180
60
40
180
120
60
Phase
120
60
Phase
Phase
20
20
20
0
0
0
0
0
0
Gain
Gain
Gain
-20
-40
-60
-60
-120
-180
-20
-40
-60
-60
-120
-180
-20
-40
-60
-60
-120
-180
1
100
1k
10k
100k 1M
1
100
1k
10k
100k 1M
1
100
1k
10k
100k 1M
ꢀꢀ
ꢀꢀ
ꢀꢀ
Frequency [Hz]
Frequency [Hz]
Frequency [Hz]
Fig.30 Frequency response property 5
(VCC = 6.0 V, Io = 500 mA)
Fig.31 Frequency response property 6
(VCC = 8.4 V, Io = 500 mA)
Fig.29 Frequency response property 4
(VCC = 3.0 V, Io = 500 mA)
●Reference Board Pattern
VOUT
Lx
GND
VBAT
・The radiation plate on the rear should be a GND flat surface of low impedance in common with the PGND flat surface.
・It is recommended to install a GND pin in another system as shown in the drawing without connecting it directly to
this PGND
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2011.08 - Rev.D
8/15
Technical Note
BD8314NUV
●Limits of the lowest power supply voltage to start up
When using configuration of inputting VCC voltage from output voltage of DC/DC converter, the input voltage as power
supply for the IC drops by Vf voltage of external Diode.
The worst condition is shown as below.
VCC terminal voltage - Vf voltage of external diode ≧ the worst voltage of UVLO reset voltage(=2.8V)
Please judge this IC is useable or not considering needed start up voltage and load current.
3.2
VOUT=10V, typ
3.0
-35℃
2.8
2.6
25℃
2.4
85℃
2.2
0.1
1.0
10.0
100.0
Io [mA]
Fig.32 start up voltage Vs load current
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2011.08 - Rev.D
9/15
Technical Note
BD8314NUV
●Selection of Part for Applications
(1) Inductor
A shielded inductor that satisfies the current rating
(current value, Ipecac as shown in the drawing below)
and has a low DCR (direct resistance component) is
recommended.
Inductor values affect inductor ripple current, which will
cause output ripple.
ΔIL
Ripple current can be reduced as the coil L value
becomes larger and the
switching frequency becomes higher.
Fig.33 Inductor current
Ipeak IOUT
VOUT / VIN
/ηΔIL / 2 [A] ・・・(1)
1
ΔIL VIN VOUT VIN [A]
・・・(2)
L
VOUT
f
(η: Efficiency, ∆IL: Output ripple current, f: Switching frequency)
As a guide, inductor ripple current should be set at about 20 to 50% of the maximum input current.
* Current over the coil rating flowing in the coil brings the coil into magnetic saturation, which may lead to lower
efficiency or output oscillation. Select an inductor with an adequate margin so that the peak current does not
exceed the rated current of the coil.
(2) Output capacitor
A ceramic capacitor with low ESR is recommended for output in order to reduce output ripple.
There must be an adequate margin between the maximum rating and output voltage of the capacitor, taking the DC
bias property into consideration.
Output ripple voltage is obtained by the following equation.
VOUT VIN
f CO VOUT
VPP IOUT
IOUT RESR [V]
・・・(3)
Setting must be performed so that output ripple is within the allowable ripple voltage.
(3) Output voltage setting
The internal reference voltage of the ERROR AMP is 1.0 V. Output voltage is obtained by Equation (4) of Fig. 33,
but it should be designed taking about 50 Ω, an error of NMOS ON resistance of SWOUT into consideration.
VOUT
R1 R2
R2
1.0 [V]
ERROR AMP
R1
R2
VO
・・・(4)
INV
VREF
1.0V
SWOUT
STB
Fig.34 Setting of voltage feedback resistance
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Technical Note
BD8314NUV
(4) DC/DC converter frequency response adjustment system
Condition for stable application
The condition for feedback system stability under negative feedback is that the phase delay is 135 °or less when
gain is 1 (0 dB).
Since DC/DC converter application is sampled according to the switching frequency, the bandwidth GBW of the
whole system (frequency at which gain is 0 dB) must be controlled to be equal to or lower than 1/10 of the switching
frequency.
In summary, the conditions necessary for the DC/DC converter are:
-
-
Phase delay must be 135°or lower when gain is 1 (0 dB).
Bandwidth GBW (frequency when gain is 0 dB) must be equal to or lower than 1/10 of the switching frequency.
To satisfy above two items, R1, R2, R3, DS and RS in Fig. 34 should be set as follows.
VOUT
R1
[1] R1, R2, R3
BD8314NUV incorporates phase compensation devices of
R4=62 kΩ and C2=200pF. These C2 and R1, R2, and R3
values decide the prim ary pole that determines the
bandwidth of DC/DC converter.
Inside of IC
R4
Cs
Rs
C2
FB
Primary pole point frequency
R3
R2
1
fp=
・・・・(1)
R1・R2
2π A×(
+R3)×C2
R1+R2
Fig.35 Example of phase compensation setting
DC/DC converter DC Gain
A
: ERROR AMP Gain
About 100dB = 105
: Oscillator amplification = 0.5
: Input voltage
1
VOUT
DC Gain A
・・・・(2)
B
VOUT VIN
B
VIN
VOUT : Output voltage
By Equations (1) and (2), the frequency fsw of point 0 dB under limitation of the bandwidth of the DC gain at the
primary pole point is as shown below.
1
1
VOUT
fSW fpDC Gain
・・・・(3)
R1R2
R1R2
R3
B
VOUT VIN
2πC2
It is recommended that fsw should be approx.10 kHz. When load response is difficult, it may be set at approx. 20
kHz. By this setting, R1 and R2, which determine the voltage value, will be in the order of several hundred kΩ.
Therefore, if an appropriate resistance value is not available and routing may cause noise, the use of R3 enables
easy setting.
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2011.08 - Rev.D
11/15
Technical Note
BD8314NUV
[2]Cs and Rs setting
In the step-up DC/DC converter, the secondary pole point is caused by the coil and capacitor as expressed by the
following equation.
1D
fLC
・・・・(4)
2π
LC
D: ON Duty = ( VOUT - VIN ) / VOUT
This secondary pole causes a phase rotation of 180°. To secure the stability of the system, put zero points in 2
places to perform compensation.
1
Zero point by built-in CR fz1
13 kHz
・・・・(5)
・・・・(6)
2πR4C2
1
Zero point by Cs
fz1
2π
R1R3 CS
Setting CS2 to be half to 2 times a frequency as large as fLC provides an appropriate phase margin.
It is desirable to set Rs at about 1/20 of (R1+R3) to cancel any phase boosting at high frequencies.
Those pole points are summarized in the figure below. The actual frequency property is different from the ideal
calculation because of part constants. If possible, check the phase margin with a frequency analyzer or network
analyzer, etc.. Otherwise, check for the presence or absence of ringing by load response waveform and also
check for the presence or absence of oscillation under a load of an adequate margin.
(5) (6)
(3)
(4)
Fig. 36 Example of DC/DC converter frequency property
(Measured with FRA5097 by NF Corporation)
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2011.08 - Rev.D
12/15
Technical Note
BD8314NUV
●I/O Equivalence Circuit
FB
INV
VCC
VREG
VREG
VREG
FB
INV
VREG
SWOUT
VCC
VCC
VCC
VREG
SWOUT
STB
Lx, PGND
VCC
VCC
Lx
STB
PGND
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Technical Note
BD8314NUV
●Notes for Use
1) Absolute Maximum Rating
We dedicate much attention to the quality control of these products, however the possibility of deterioration or destruction
exists if the impressed voltage, operating temperature range, etc., exceed the absolute maximum ratings. In addition, it is
impossible to predict all destructive situations such as short-circuit modes, open circuit modes, etc. If a special mode
exceeding the absolute maximum rating is expected, please review matters and provide physical safety means such as
fuses, etc.
2) GND Potential
Keep the potential of the GND pin below the minimum potential at all times.
3) Thermal Design
Work out the thermal design with sufficient margin taking power dissipation (Pd) in the actual operation condition into
account.
4) Short Circuit between Pins and Incorrect Mounting
Attention to IC direction or displacement is required when installing the IC on a PCB. If the IC is installed in the wrong
way, it may break. Also, the threat of destruction from short-circuits exists if foreign matter invades between outputs or the
output and GND of the power supply.
5) Operation under Strong Electromagnetic Field
Be careful of possible malfunctions under strong electromagnetic fields.
6) Common Impedance
When providing a power supply and GND wirings, show sufficient consideration for lowering common impedance and
reducing ripple (i.e., using thick short wiring, cutting ripple down by LC, etc.) as much as you can.
7) Thermal Protection Circuit (TSD Circuit)
This IC contains a thermal protection circuit (TSD circuit). The TSD circuit serves to shut off the IC from thermal
runaway and does not aim to protect or assure operation of the IC itself. Therefore, do not use the TSD circuit for
continuous use or operation after the circuit has tripped.
8) Rush Current at the Time of Power Activation
Be careful of the power supply coupling capacity and the width of the power supply and GND pattern wiring and routing
since rush current flows instantaneously at the time of power activation in the case of CMOS IC or ICs with multiple
power supplies.
9) IC Terminal Input
This is a monolithic IC and has P+ isolation and a P substrate for element isolation between each element. P-N junctions
are formed and various parasitic elements are configured using these P layers and N layers of the individual elements.
For example, if a resistor and transistor are connected to a terminal as shown on Fig.37:
○The P-N junction operates as a parasitic diode
when GND > (Terminal A) in the case of a resistor or when GND > (Pin B) in the case of a transistor (NPN)
○Also, a parasitic NPN transistor operates using the N layer of another element adjacent to the previous diode in the
case of a transistor (NPN) when GND > (Pin B).
The parasitic element consequently rises under the potential relationship because of the IC’s structure. The parasitic
element pulls interference that could cause malfunctions or destruction out of the circuit. Therefore, use caution to avoid
the operation of parasitic elements caused by applying voltage to an input terminal lower than the GND (P board), etc.
Transistor (NPN)
B
Resistor
(Pin B)
(Pin A)
E
C
GND
N
(Pin A)
P+
P
P+
P+
P+
P
N
N
N
N
N
N
Parasitic Element
P Substrate
GND
P Substrate
GND
GND
Parasitic Element
Parasitic
Element
Fig.37 Example of simple structure of Bipolar IC
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev.D
14/15
Technical Note
BD8314NUV
●Ordering part number
B D
8
3
1
4
N U V
-
E
2
Part No.
Part No.
Package
NUV: VSON010V3030
Packaging and forming specification
E2: Embossed tape and reel
VSON010V3030
<Tape and Reel information>
3.0 0.1
Tape
Embossed carrier tape
3000pcs
Quantity
1PIN MARK
E2
S
Direction
of feed
The direction is the 1pin of product is at the upper left when you hold
reel on the left hand and you pull out the tape on the right hand
(
)
0.08
S
2.0 0.1
0.5
C0.25
1
5
10
6
+0.05
0.5
Direction of feed
1pin
0.25
-
0.04
Reel
(Unit : mm)
Order quantity needs to be multiple of the minimum quantity.
∗
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.08 - Rev.D
15/15
Notice
N o t e s
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, commu-
nication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-
controller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
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© 2011 ROHM Co., Ltd. All rights reserved.
R1120
A
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