ROHM BD8311NUV

Single-chip Type with Built-in FET Switching Regulators
High-efficiency Step-up
Switching Regulator
with Built-in Power MOSFET
No.10027ECT03
BD8311NUV
●Description
ROHM’s High-efficiency Step-up Switching Regulator Built-in Power MOSFET BD8311NUV generates step-up output
including 8 V or 10 V from 4 batteries, batteries such as 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 3.5 V – 11 V
5) Output current
600 mA (3.5 V – 10 V) at 10 V
800 mA (3.5 V – 8 V) at 8 V
6) Incorporates soft-start function.
7) Incorporates timer latch system short protecting function.
8) As small as 3 mm2, SON 10-pin package
VSON010V3030
●Application
General portable equipment like DSC/DVC powered by 4 dry batteries or Li2cell
●Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
VCC, LX
14
V
Maximum input voltage
SWOUT, INV
14
V
Maximum input current
Iinmax
2.5
A
Pd
700
mW
Maximum applied power voltage
Power dissipation
Operating temperature range
Topr
-25 to +85
°C
Storage temperature range
Tstg
-55 to +150
°C
Tjmax
+150
°C
Junction temperature
*1 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.
* These specifications are subject to change without advance notice for modifications and other reasons.
●Operating Conditions (Ta = 25°C)
Parameter
Power supply voltage
Output voltage
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Symbol
Ratings
Unit
VCC
3.5 to 11
V
VOUT
4.0 to 11
V
1/14
2010.11 - Rev.C
Technical Note
BD8311NUV
●Electrical characteristics
Parameter
Symbol
Limits
Unit
Min.
Typ.
Max.
VUV
-
2.9
3.2
V
ΔVUVhy
100
200
300
mV
fosc
1.1
1.2
1.3
MHz
VREG
4.65
5.0
5.35
V
INV threshold voltage
VINV
0.99
1.00
1.01
V
Input bias current
IINV
-50
0
50
nA
Soft-start time
Tss
5.3
8.8
12.2
msec
Dmax1
77
85
93
%
RONSWOUT
-
50
100
Ω
LX NMOS ON resistance
RON
-
80
150
mΩ
LX leak current
Ileak
-1
0
1
µA
Operation
VSTBH
2.5
-
VCC
V
No-operation
VSTBL
-0.3
-
0.3
V
RSTB
250
400
700
kΩ
ISTB
-
-
1
µA
Icc
-
600
900
µA
Conditions
[Low voltage input malfunction preventing circuit]
Detection threshold voltage
Hysteresis range
VREG monitor
[Oscillator]
Oscillation frequency
[Regulator]
Output voltage
[ERROR AMP]
VCC=11.0V , VINV=5.5V
[PWM comparator]
LX Max Duty
[SWOUT]
ON resistance
[Output]
[STB]
STB pin
control voltage
STB pin pull-down resistance
[Circuit current]
Standby current VCC
Circuit current at operation VCC
VINV=1.2V
 Not designed to be resistant to radiation
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2/14
2010.11 - Rev.C
Technical Note
BD8311NUV
●Description of Pins
Pin No.
Pin Name
Function
1
GND
Ground terminal
Control part power input terminal
GND
SWOUT
2
VCC
VCC
INV
3
VREG
VREG
STB
4～5
Lx
6～7
PGND
LX
PGND
8
STB
ON/OFF terminal
LX
PGND
9
INV
ERROR AMP input terminal
10
SWOUT
STBSW for split resistance
5 V output terminal of regulator for internal circuit
Coil connecting terminal
Power transistor ground terminal
Fig.1 Pin layout
●Block Diagram
VREG
STB
VCC
5V REG
STBY_IO
Reference
VREG
GND
VREF
FB H
OSC
1.2MHz
UVLO
Lx
SCP
OSC×16000 ｃount
STOP
PWM
CONTROL
VREG
PRE
DRIVER
80mΩ
PGND
+
+
-
ERROR_AMP
VREF
Soft
Start
STB
SWOUT
50Ω
INV
Fig.2 Block diagram
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3/14
2010.11 - Rev.C
Technical Note
BD8311NUV
●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 VCC pin voltage to turn off all output FET and DC/DC converter output when VCC voltage is lower than 2.9 V,
and reset the timer latch of the internal SCP circuit and soft-start circuit. This threshold contains 200 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 sawtooth 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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4/14
2010.11 - Rev.C
Technical Note
BD8311NUV
●Reference Data
(Unless otherwise specified, Ta = 25°C, VCC = 7.4 V)
1.02
1.02
1.01
1.01
5.3
1.00
0.99
VREG VOLTAGE [V]
INV THRESHOLD [V]
INV THRESHOLD [V]
5.2
1.00
5.1
5.0
4.9
0.99
4.8
4.7
0.98
0.98
-40
-20
0
20
40
60
80
100
0
120
2
4
6
8
10
12
-40
14
0
VCC [V]
TEMPERATURE [℃]
Fig.4. INV threshold power supply property
Fig.3. INV threshold temperature property
80
120
Fig.5. VREG output temperature property
1.4
1.4
8
40
TEMPERATURE [℃]
7
5
4
3
2
FREQUENCY [ MHz ]
FREQUENCY [MHz]
VREG[V]
1.3
1.3
6
1.2
1.2
1.1
1.1
1
0
1.0
1.0
0
2
4
6
8
10
12
14
-40
0
3.5
6
9
15
Fig.8. fosc voltage property
120
160
0.25
12
VCC [V]
UVLO release
0.20
3.2
0.15
Hysteresis width
2.9
0.10
UVLO detection
2.8
2.7
0.05
140
ID=500mA
120
100
80
60
40
2.5
0.00
-40
-20
0
25
50
85
100 120
TEMPARATURE [℃]
Fig.9. UVLO
threshold temperature property
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80
60
40
20
20
2.6
ID=500mA
100
ON RESISTANCE [ mΩ]
3.3
ON RESISTANCE [ mΩ ]
3.4
Hysteresis
Voltage
Vhys[V]
Vhys
[V]
ヒステリシス電圧
UVLO THRESHOLD VOLTAGE [ Ｖ ]
3
120
Fig.7. fosc temperature property
Fig.6. VREG output power supply property
3.0
80
TEMPERATURE [℃]
VCC [V]
3.1
40
0
0
-40
0
40
80
120
TEMPARATURE [℃]
Fig.10. Nch FET ON resistance
temperature property
5/14
3
6
9
12
15
VCC [V]
Fig.11. Nch FET ON resistance
power supply property
2010.11 - Rev.C
Technical Note
BD8311NUV
ON
2.0
1.5
ID=1mA
80
ID=1mA
80
SWOUT ON Resistance [Ω ]
SWOUT ON Resistance [Ω ]
STB Voltage [V]
100
100
2.5
60
40
20
60
40
20
OFF
1.0
0
-50
0
50
100
150
0
-40
VCC [V]
40
80
120
3
6
Fig.13. SWOUT ON
resistance temperature property
95
90
90
85
12
15
Fig.14. SWOUT ON
resistance power supply property
2.5
2.0
STB Voltage [V]
Lx Max Duty [ % ]
95
9
VCC [V]
TEMPARATURE [℃]
Fig.12. STB
threshold temperature
Lx Max Duty [%]
0
85
1.5
80
80
1.0
75
75
-40
0
40
80
3
120
6
9
12
15
VCC [V]
TEMPARATURE [℃]
Fig.15. Lx Max duty temperature property
Fig.16. Lx Max duty power supply property
-50
0
50
100
150
TEMPARATURE [℃]
Fig.17. Circuit current temperature property
1000
800
ICC [uA]
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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2010.11 - Rev.C
Technical Note
BD8311NUV
●Example of Application
Input: 3.5 to 10 V, output: 10.1 V / 500 mA
RSX201L-30 (ROHM)
10V/500mA
22µF
GRM32EB31C226KE16( Murata)
4.7µH
DE3518E( TOKO)
10p
ON/OFF
200k
10k
100k
6
PGND
7
PGND
8
STB
9
INV
5
Lx
Lx
VBAT=2.5~ 4.5V
4
VREG
3
VCC
2
1µF
GRM188B11A105KA61( Murata)
1µF
GRM21BB11C105KA01( Murata)
22k
10
SWOUT
10µF
GRM31CB31E106KA75L( Murata)
3.3~ 5.0V
1
GND
Fig.19 Reference application diagram
● Reference Application Data 1
100
100
100
VCC=10V
VCC=7.4V
VCC=8.4V
40
60
VCC=4.8V
40
1
10
100
1000
1
10000
VCC=3.5V
40
0
0
0
60
20
20
20
10
100
1000
1
10000
Fig.20 Power conversion efficiency 1
10.5
10.5
10.4
10.4
13
10.3
OUTPUT VOLTAGE [V]
11
10
Io=500mA
8
10.0
9.9
9.7
6
9.6
5
9.5
2
4
6
8
10
INPUT VOLTAGE [V]
Fig.23 Line regulation
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12
VCC=7.4V
9.8
7
0
VCC=8.4V
10.1
10000
10.3
VCC=10V
10.2
VCC=6.0V
OUTPUT VOLTAGE [V]
Io=100mA
1000
Fig.22 Power conversion efficiency 3
Fig.21 Power conversion efficiency 2
14
12
100
OUTPUT CURRENT [mA]
15
9
10
OUTPUT CURRENT [mA]
OUTPUT CURRENT [mA]
OUTPUT VOLTAGE [V]
EFFICIENCY [%]
EFFICIENCY [%]
EFFICIENCY [%]
60
VCC=4.0V
80
VCC=6.0V
80
80
10.2
VCC=4.8V
10.1
10.0
9.9
VCC=4.0V
9.8
VCC=3.5V
9.7
9.6
9.5
1
10
100
1000
OUTPUT CURRENT [mA]
Fig.24 Load regulation 1
7/14
10000
1
10
100
1000
10000
OUTPUT CURRENT [mA]
Fig.25 Load regulation 2
2010.11 - Rev.C
Technical Note
BD8311NUV
●Reference Application Data 2 (VCC = 3.5 V, 6.0 V, 8.4 V, VOUT = 10 V)
120
40
20
60
20
0
0
120
40
20
60
0
0
40
Phase
Gain
-20
-60
-40
-60
100
100
1k
1000
10k
10000
Gain [dB]
Phase [deg]
Gain [dB]
Phase
Gain
-20
-120
-40
-180
100k 1000000
1M
100000
-60
100
100
周波数 [Hz]
Frequency
[Hz]
1k
10k
100k
60
0
Gain
-20
-40
-180
100k 1000000
1M
100000
-60
120
60
0
-120
-60
-120
100
100
1k
1000
10k
10000
-180
100k 1000000
1M
100000
Frequency
[Hz]
周波数 [Hz]
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)
1M
180
60
120
40
20
60
20
0
0
40
10k
10000
Phase
周波数 [Hz]
Frequency
[Hz]
Fig.26 Frequency response property 1
(VCC = 3.5 V, Io = 200 mA)
100
1k
1000
-60
180
Phase [deg]
60
60
Gain [dB]
180
180
Phase [deg]
60
Phase
180
60
120
40
60
20
180
Phase
120
-20
Gain
-40
-60
100
100
1k
1000
10k
10000
100k
100000
0
-60
-20
-60
-20
-120
-40
-120
-40
-180
1M
1000000
-60
-180
1M
1000000
-60
100
100
10k
10000
100k
100000
Frequency
[Hz]
周波数 [Hz]
周波数 [Hz]
Frequency
[Hz]
Fig.29 Frequency response property 4
(VCC = 3.5 V, Io = 500 mA)
1k
1000
60
0
Gain
Phase [deg]
0
Gain
Gain [dB]
0
Phase [deg]
Gain [dB]
Phase [deg]
Gain [dB]
Phase
-60
-120
100
100
1k
1000
10k
10000
100k
100000
-180
1M
1000000
Frequency
[Hz]
周波数[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)
● Reference Board Pattern
VOUT
GND
Lx
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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2010.11 - Rev.C
Technical Note
BD8311NUV
●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.
Ripple current can be reduced as the coil L value becomes larger and the
switching frequency becomes higher.
Ipeak =Iout ×(Vout/VIN) /η + ∆IL/2 [A]
Vin
∆IL=
L
×
Vout -Vin
Vout
Fig.32 Inductor current
(1)
1
×
[A]
Δ IL
(2)
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.
Vpp=Iout ×
Vout-Vin
f×Co×Vout
+
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
ERROR AMP
R1
INV
R2
Vo=
(R1+R2)
VREF
1.0V
R2
×1.0 [V] ・・・ (4)
SWOUT
STB
Fig.33 Setting of voltage feedback resistance
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2010.11 - Rev.C
Technical Note
BD8311NUV
(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.
[1] R1, R2, R3
BD8311NUV 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.
VOUT
R1
Inside of IC
R4 C2
Rs
R2
Primary pole point frequency
fp=
Cs
FB
R3
1
R1・R2
2π A×(
+R3)×C2
R1+R2
················(1)
Fig.34 Example of phase compensation setting
DC/DC converter DC Gain
DC Gain =A×
1
B
×
VOUT
VOUT-VIN
A: ERROR AMP Gain
5
About 100dB = 10
B: Oscillator amplification = 0.5
Input voltage
VIN:
VOUT: Output voltage
················ (2)
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.
fSW = fp×DC Gain =
1
(R1・R2)
2πC2×(
+R3 )
(R1+R2)
×
1
B
×
VOUT
VOUT-VIN
················(3)
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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2010.11 - Rev.C
Technical Note
BD8311NUV
[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.
1－D
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.
Zero point by built-in CR
fZ1=
Zero point by Cs
fZ1=
1
2πR4C2
= 13kHz
1
················ (5)
················ (6)
2π(R1+R3)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. 35 Example of DC/DC converter frequency property
(Measured with FRA5097 by NF Corporation)
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2010.11 - Rev.C
Technical Note
BD8311NUV
●I/O Equivalence Circuit
FB
INV
VREG
VCC
VREG
FB
VREG
INV
VREG
SWOUT
VCC
VCC
VCC
SWOUT
VREG
STB
Lx, PGND
VCC
VCC
Lx
STB
PGND
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2010.11 - Rev.C
Technical Note
BD8311NUV
●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.36:
○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.
B
C
N
P＋
N
P
N
P Substrate
P＋
P＋
N
Parasitic Element
GND
P
N
Ｎ
E
(Pin A)
P＋
～
～
(Pin B)
(Pin A)
～
～
Transistor (NPN)
Resistor
N
Parasitic Element
P Substrate
Parasitic Element
GND
GND
Fig.36 Example of simple structure of Bipolar IC
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13/14
2010.11 - Rev.C
Technical Note
BD8311NUV
●Ordering part number
B
D
8
Part No.
3
1
1
N
Part No.
U
V
Package
NUV: VSON010V3030
-
E
2
Packaging and forming specification
E2: Embossed tape and reel
VSON010V3030
<Tape and Reel information>
3.0±0.1
3.0±0.1
0.08 S
S
Embossed carrier tape
Quantity
3000pcs
Direction
of feed
(0.22)
+0.03
0.02 -0.02
1.0MAX
1PIN MARK
Tape
E2
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
)
2.0±0.1
0.5
1
5
10
6
1.2±0.1
0.4±0.1
0.5
C0.25
+0.05
0.25 -0.04
1pin
(Unit : mm)
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© 2010 ROHM Co., Ltd. All rights reserved.
Reel
14/14
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2010.11 - Rev.C
Notice
Notes
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, communication 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
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shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
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The Products are not designed or manufactured to be used with any equipment, device or
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More detail product informations and catalogs are available, please contact us.
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R1010A