＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x SERIES
Step-up DC/DC converter for White LED Backlight
NO.EA-166-111123
OUTLINE
The R1218x Series are PWM control type step-up DC/DC converter ICs with low supply current.
The R1218x is fully dedicated to drive White LED with constant current. Each of these ICs consists of an
NMOS FET, an oscillator, a PWM comparator, a voltage reference unit, an error amplifier, a current limit circuit,
an under voltage lockout circuit (UVLO), an over-voltage protection circuit (OVP).
The R1218x can drive white LEDs with high efficiency with low supply current. A diode is built-in the
R1218xxx1A, therefore it is possible to drive up to 4LEDs without an external diode. The R1218xxx2A, an
external diode is necessary, however, up to 7 serial LEDs can be driven with the R1218xxx2A.
Constant current can be set with an external resistance value. Dimming control is possible by PWM signal for
CE pin. Feedback voltage is 0.2V, therefore power loss by current setting resistor is small and efficiency is good.
Maximum duty cycle is internally fixed, Typ. 91% to 92%. LEDs can be driven from low voltage. Protection
circuits are the current limit of Lx peak current, the over voltage limit of output, and the under voltage lockout
function.
Packages are standard SOT-23-6 and very tiny DFN(PLP)1820-6.
FEATURES
•
•
•
•
•
•
•
•
•
Input voltage.................................................. 1.8V to 5.5V
Built-in 400mA, 1.5Ω, 20V Nch MOSFET and diode (R1218xxx1A)
Built-in 400mA, 1.5Ω, 33V Nch MOSFET (R1218xxx2A)
Oscillator Frequency (PWM control)............. 1.2MHz
Maximum Duty Cycle .................................... Typ. 91% to 92%
Feedback Voltage ......................................... Typ. 0.2V
UVLO Threshold Voltage .............................. Typ. 1.6V (Hysteresis Typ. 0.1V)
Lx Current limit Protection............................. Typ. 700mA
Over Voltage Protection (OVP) Threshold .... Typ. 9.5V (R1218x021A)
Typ. 14.0V (R1218x031A)
Typ. 18.5V (R1218x041A)
Typ. 23.0V (R1218x052A)
Typ. 27.5V (R1218x062A)
Typ. 31.5V (R1218x072A)
• LED dimming control..................................... by external PWM signal (Frequency 200Hz to 5kHz) to CE pin
by feedback voltage and filtered PWM signal (high frequency)
• Packages ...................................................... DFN(PLP)1820-6, SOT-23-6
APPLICATION
• White LED Backlight for portable equipment
1
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
BLOCK DIAGRAMS
R1218xxx1A
VFB
VIN
Error Amp
LX
VOUT
UVLO
PWM Comp
R
Switch
Control
Q
S
OVP
Vref
OSC
Slope
Compensation
Current
Protect
Current
sense
Σ
Shutdown
delay
Chip Enable
CE
GND
R1218xxx2A
VFB
VIN
Error Amp
LX
VOUT
UVLO
PWM Comp
R
Q
S
Switch
Control
OVP
Vref
OSC
Slope
Compensation
Current
Protect
Current
sense
Σ
Shutdown
delay
Chip Enable
CE
2
GND
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
SELECTION GUIDE
The OVP threshold, the built-in diode, and the package for the ICs can be selected at the user’s request.
Product Name
R1218Kxxxx-TR
R1218Nxxxx-TR-FE
Package
Quantity per Reel
Pb Free
Halogen Free
DFN(PLP)1820-6
5,000 pcs
Yes
Yes
SOT-23-6
3,000 pcs
Yes
Yes
xx xx: The combination of the OVP threshold and with/without of built-in diode can be designated.
Code
OVP Threshold
Built-in Diode
021A
9.5V
Yes
031A
14.0V
Yes
041A
18.5V
Yes
052A
23.0V
No
062A
27.5V
No
072A
31.5V
No
3
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
PIN CONFIGURATIONS
• DFN(PLP)1820-6
Top View
6
5
4
• SOT-23-6
Bottom View
4
5
6
5
4
6
(mark side)
1
2
3
3
2
1
1
2
PIN DESCRIPTIONS
•
DFN(PLP)1820-6
Pin No
Symbol
Pin Description
1
CE
Chip Enable Pin ("H" Active)
2
VFB
Feedback Pin
3
Lx
Switching Pin
(Open Drain Output)
4
GND
5
VIN
6
VOUT
Ground Pin
Power Supply Input Pin
Output Pin
∗) Tab is GND level. (They are connected to the reverse side of this IC.)
The tab is better to be connected to the GND, but leaving it open is also acceptable.
•
4
SOT-23-6
Pin No
Symbol
Pin Description
1
CE
Chip Enable Pin ("H" Active)
2
VOUT
Output Pin
3
VIN
Power Supply Input Pin
4
Lx
Switching Pin (Open Drain Output)
5
GND
6
VFB
Ground Pin
Feedback Pin
3
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
ABSOLUTE MAXIMUM RATINGS
Symbol
(GND=0V)
Item
Rating
Unit
VIN
VIN Pin Voltage
6.5
V
VCE
CE Pin Voltage
−0.3 to VIN+0.3
V
VFB
VFB Pin Voltage
−0.3 to VIN+0.3
V
VOUT
VOUT Pin Voltage
VLX
LX Pin Voltage
ILX
R1218xxx1A
−0.3 to 22
R1218xxx2A
−0.3 to 34
R1218xxx1A
−0.3 to 22
R1218xxx2A
−0.3 to 34
LX Pin Current
1000
∗
420
Power Dissipation (SOT-23-6)
PD
∗
Power Dissipation (DFN(PLP)1820-6)
V
V
mA
mW
880
Topt
Operating Temperature Range
−40 to 85
°C
Tstg
Storage Temperature Range
−55 to 125
°C
∗) For Power Dissipation, please refer to PACKAGE INFORMATION.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the
permanent damages and may degrade the life time and safety for both device and system using the device
in the field.
The functional operation at or over these absolute maximum ratings is not assured.
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the
recommended operating conditions, even if when they are used over such conditions by momentary
electronic noise or surge. And the semiconductor devices may receive serious damage when they continue
to operate over the recommended operating conditions.
5
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
ELECTRICAL CHARACTERISTICS
•
R1218xxxxA
Symbol
Topt=25°C
Item
VIN
Input Voltage
IDD
Supply Current
VIN=5.5V, VFB=0V, Lx at no load
VIN=5.5V, VCE=0V
VUVLO1
UVLO Detector Threshold
VIN falling
VUVLO2
UVLO Released Voltage
VIN rising
VCEH
CE Input Voltage "H"
VIN=5.5V
VCEL
CE Input Voltage "L"
VIN=1.8V
RCE
CE Pull Down Resistance
VIN=3.6V
tshtdn
CE Shutdown Delay Time
VIN=3.6V
VFB Voltage
VIN=3.6V
VFB Voltage Temperature
Coefficient
VIN=3.6V, −40°C ≤ Topt ≤ 85°C
IFB
VFB Input Current
VIN=5.5V, VFB=0V or 5.5V
RON
Switch On Resistance
VIN=3.6V, ISW=100mA
ILXleak
Switch Leakage Current
ΔVFB/
ΔTopt
Min.
Typ.
Max.
Unit
5.5
V
0.5
1.0
mA
0
3.0
μA
1.6
1.7
V
VUVLO1+0.1
1.8
V
1.8
Istandby Standby Current
VFB
1.5
1.5
600
V
1200
0.5
V
2200
kΩ
10
0.19
0.20
ms
0.21
ppm
/°C
±150
−0.1
V
0.1
μA
Ω
1.5
R1218xxx1A
VLX=20V
0
3.0
μA
R1218xxx2A
VLX=29V
0
3.0
μA
700
1000
mA
Switch Current Limit
VIN=3.6V
Vf
Diode Forward Voltage
R1218xxx1A
IDIODE=100mA
0.8
V
IDIODEleak
Diode Leakage Current
R1218xxx1A
VOUT=20V, VLX=0V
10
μA
Oscillator Frequency
VIN=3.6V, VOUT=VFB=0V
1.0
1.2
VIN=3.6V,
VOUT=VFB=0V
R1218x072A
86
92
Others
86
91
R1218x021A
8.5
9.5
10.5
R1218x031A
13.0
14.0
15.0
R1218x041A
17.0
18.5
20.0
R1218x052A
21.5
23.0
24.5
R1218x062A
26.0
27.5
29.0
R1218x072A
30.0
31.5
33.0
ILXlim
fosc
Maxduty Maximum Duty Cycle
VOVP1
VOVP2
6
Conditions
OVP Detector Threshold
OVP Released Voltage
VIN=3.6V,
VOUT rising
VIN=3.6V,
VOUT falling
400
R1218x021A
VOVP1−0.5
R1218x031A
VOVP1−0.75
R1218x041A
VOVP1−1.0
R1218x052A
VOVP1−1.25
R1218x062A
VOVP1−1.5
R1218x072A
VOVP1−1.75
1.4
MHz
%
V
V
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
TYPICAL APPLICATIONS
L1
22μH
L1
22μH
C1
1μF
C1
1μF
VIN
LX
CE
VIN
VOUT
GND
VFB
LX
CE
R1
10Ω
VOUT
VFB
GND
R1218x041A
•
C2
0.22μF
C2
0.22μF
R1
10Ω
R1218x072A
LED Current setting
LED current can be set with feedback resistor(R1)
ILED=0.2 / R1
•
LED Dimming Control, Softstart
(1) LED dimming control by PWM signal to CE pin
LED dimming control is possible by forcing PWM signal to CE pin.
When the power-on or start up with CE pin, softstart function works, however, after that, if the CE pin is set
as "L" and set CE pin "H" again during the shutdown delay time, softstart function is disabled and starts up
fast to normal mode, therefore 200Hz to 5kHz PWM signal is standard. By the CE pin input, LED turns on
and off. Average LED current varies depending on the duty cycle of CE input. Too high frequency PWM
signal is not effective because of its delay.
CE
VFB
R1
Dimming controle by CE pin input
7
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
(2) Dimming control by DC voltage
LED dimming control is also possible by using the DC voltage to VFB pin. LED current is adjustable by DC
voltage and resistors, R1 and R2 in the following figure.
ILED=(DC − 0.2) / R2 − 0.2 / R1
R2
VFB
DC
R1
Dimming control by DC voltage
(3) Dimming control by feedback voltage and filtered PWM signal
LED dimming control is also possible by using the feedback voltage and filtered PWM signal.
LED current is adjustable according to the "H" level (VH) and "L" level(VL) of PWM signal and resistors,
R1, R2, R3, and R4 in the following figure.
R2
VFB
R3
C3
R4
R1
VH
VL
Dimming controle by filtered PWM signal
Duty=0% to 100% PWM signal duty cycle can be used up to the maximum LED current and minimum LED
current as in the next formulas.
ILEDMIN={0.2 − R2 × (VH − 0.2) / (R3 + R4)} / R1
ILEDMAX={0.2 − R2 × (VL − 0.2) / (R3 + R4)} / R1
For example, supposed that the PWM signal level is set as 2.5V/0V, to adjust the LED current range from 0mA
to 20mA by the duty cycle, our recommendation external components values are, R1=10Ω, R2=5.1kΩ,
R3=51kΩ, R4=5.1kΩ or around.
C3 should be set large enough to regard the PWM signal as adjustable DC voltage by the filter. In this method,
higher frequency control than the frequency against the CE pin can be used for dimming control.
For example, if the frequency is 40kHz, 0.1μF or more capacitor is our recommendation value as C3.
8
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
•
Selection of Inductors
The peak current of the inductor at normal mode can be calculated as next formula:
ILXpeak=1.25 × ILED × VOUT / VIN + 0.5 × VIN × (VOUT − VIN) / (L × VOUT × fosc)
When the start-up or dimming control by CE pin, transient current flows, the peak current must be equal or
less than the current limit of the IC. The peak current should not beyond the rating current of the inductor. For
example, for 4 serial LED drive from VIN=3.6V, recommendation value of the inductor is 22μH or more.
•
Selection of Capacitors
Set 1μF or more value bypass capacitor C1 between VIN pin and GND pin as close as posible.
Set 0.22μF or more capacitor C2 between VOUT and GND pin.
TEST CIRCUITS
A
LX
VIN
R1218x
Series
CE
GND
VOUT
VFB
Supply Current Test Circuit
LX
R1218x
Series
VOUT
CE
VIN
GND
OSCILLOSCOPE
VFB
UVLO Detector Threshold,
UVLO Released Voltage
LX
R1218x
Series
VOUT
CE
VIN
GND
LX
R1218x
Series
VOUT
CE
VIN
OSCILLOSCOPE
VFB
GND
OSCILLOSCOPE
VFB
VFB Voltage, Oscillator Frequency,
OVP Detector Threshold,
Maximum Duty Test Circuit
OVP Released Voltage Test Circuit
9
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
TYPICAL CHARACTERISTICS
1) Efficiency vs. LED Current (2LED) L:LQH32CN220 (Topt=25°C)
R1218x021A
R1218x021A
VIN=1.8V
VIN=3.6V
100
90
80
70
60
50
40
30
20
10
0
Efficiency η (%)
Efficiency η (%)
100
90
80
70
60
50
40
30
20
10
0
0
4
8
12
16
LED Current lLED (mA)
20
0
4
8
12
16
LED Current lLED (mA)
20
R1218x021A
VIN=4.2V
Efficiency η (%)
100
90
80
70
60
50
40
30
20
10
0
0
4
8
12
16
LED Current lLED (mA)
20
2) Efficiency vs. LED Current (3LED) L: LQH32CN220 (Topt=25°C)
R1218x031A
R1218x031A
VIN=2.7V
0
10
VIN=3.6V
100
90
80
70
60
50
40
30
20
10
0
Efficiency η (%)
Efficiency η (%)
100
90
80
70
60
50
40
30
20
10
0
4
8
12
16
LED Current lLED (mA)
20
0
4
8
12
16
LED Current lLED (mA)
20
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
R1218x031A
VIN=4.2V
Efficiency η (%)
100
90
80
70
60
50
40
30
20
10
0
0
4
8
12
16
LED Current lLED (mA)
20
3) Efficiency vs. LED Current (4LED ) L: LQH32CN220 (Topt=25°C)
R1218x041A
R1218x041A
VIN=2.7V
VIN=3.6V
100
90
80
70
60
50
40
30
20
10
0
Efficiency η (%)
Efficiency η (%)
100
90
80
70
60
50
40
30
20
10
0
0
4
8
12
16
LED Current lLED (mA)
20
0
4
8
12
16
LED Current lLED (mA)
20
R1218x041A
VIN=4.2V
Efficiency η (%)
100
90
80
70
60
50
40
30
20
10
0
0
4
8
12
16
LED Current lLED (mA)
20
11
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
4) Efficiency vs. LED Current (6LED) L: LQH32CN220, Diode: CRS02 (Topt=25°C)
R1218x062A
R1218x062A
VIN=2.7V
VIN=3.6V
Efficiency η (%)
100
90
80
70
60
50
40
30
20
10
0
Efficiency η (%)
100
90
80
70
60
50
40
30
20
10
0
0
4
8
12
16
LED Current lLED (mA)
20
0
4
8
12
16
LED Current lLED (mA)
20
R1218x062A
VIN=4.2V
Efficiency η (%)
100
90
80
70
60
50
40
30
20
10
0
0
4
8
12
16
LED Current lLED (mA)
20
5) Efficiency vs. LED Current (7LED) L: LQH32CN220, Diode: CRS02 (Topt=25°C)
R1218x072A
R1218x072A
0
12
VIN=3.6V
Efficiency η (%)
Efficiency η (%)
VIN=2.8V
100
90
80
70
60
50
40
30
20
10
0
4
8
12
16
LED Current ILED (mA)
20
100
90
80
70
60
50
40
30
20
10
0
0
4
8
12
16
LED Current ILED (mA)
20
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
R1218x072A
Efficiency η (%)
VIN=4.2V
100
90
80
70
60
50
40
30
20
10
0
0
4
8
12
16
LED Current ILED (mA)
20
6) PWM Dimming Control (2LED) VIN=3.6V, R1=10Ω
6-1. Duty vs. LED Current (2LED) (Topt=25°C)
LED Current lLED (mA)
R1218x021A
25.0
22.5
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
5kHz
1kHz
200Hz
0
20
40
60
Duty (%)
80
100
6-2. Output Voltage Waveform (2LED) (Topt=25°C)
R1218x021A
R1218x021A
fosc=5kHz
fosc=200Hz
0
10
Output Voltage
5
Output Voltage VOUT (V)
5
CE Input Voltage VCE(V)
Output Voltage VOUT (V)
CE Input Voltage
CE Input Voltage
5
0
10
Output Voltage
5
CE Input Voltage VCE (V)
10
10
0
0
0
0.8
1.6
2.4
Time (ms)
3.2
0
0.04
0.08
0.12
Time (ms)
0.16
13
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
7) PWM Dimming Control (4LED) VIN=3.6V, R1=10Ω
7-1. Duty vs. LED Current (4LED) (Topt=25°C)
LED Current lLED (mA)
R1218x041A
25.0
22.5
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
5kHz
1kHz
200Hz
0
20
40
60
Duty (%)
80
100
7-2. Output Voltage Waveform (4LED) (Topt=25°C)
R1218x041A
R1218x041A
fosc=200Hz
fosc=5kHz
0
20
Output Voltage
10
0
0.8
1.6
2.4
Time (ms)
0
20
Output Voltage
10
0
3.2
8) PWM Dimming Control (6LED) VIN=3.6V, R1=10Ω
8-1. Duty vs. LED Current (6LED) (Topt=25°C)
R1218x062A
LED Current lLED (mA)
5
0
0
25.0
22.5
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
5kHz
1kHz
200Hz
0
14
CE Input Voltage
20
40
60
Duty (%)
80
100
0.04
0.08
0.12
Time (ms)
0.16
CE Input Voltage VCE (V)
5
Output Voltage VOUT (V)
CE Input Voltage
10
CE Input Voltage VCE (V)
Output Voltage VOUT (V)
10
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
8-2. Output Voltage Waveform (6LED) (Topt=25°C)
R1218x062A
R1218x062A
fosc=200Hz
fosc=5kHz
0
20
Output Voltage
10
0
CE Input Voltage
5
0
20
Output Voltage
10
CE Input Voltage VCE (V)
5
Output Voltage VOUT (V)
CE Input Voltage
10
CE Input Voltage VCE (V)
Output Voltage VOUT (V)
10
0
0
0.8
1.6
2.4
Time (ms)
0
3.2
0.04
0.08
0.12
Time (ms)
0.16
9) PWM Dimming Control (7LED) VIN=3.6V, R1=10Ω
9-1. Duty vs. LED Current (7LED) (Topt=25°C)
LED Current ILED (mA)
R1218x072A
25.0
22.5
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
IOUT=5kHz
IOUT=1kHz
IOUT=200Hz
0
20
40
60
Duty(%)
80
100
9-2. Output Voltage Waveform (7LED) (Topt=25°C)
R1218x072A
R1218x072A
fOSC=200Hz
fOSC=5kHz
0
20
Output Voltage
10
0
CE Input Voltage
5
0
20
Output Voltage
10
CE Input Voltage VCE (V)
5
Output Voltage VOUT (V)
CE Input Voltage
10
CE Input Voltage VCE (V)
Output Voltage VOUT (V)
10
0
0 0.4
1.2
2.0
Time t (ms)
2.8
3.6
0 0.02
0.06
0.10
Time t (ms)
0.14
0.18
15
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
10) VFB Voltage vs. Temperature
11) UVLO Detector Threshold/Released Voltage
vs. Temperature
R1218x041A
R1218x041A
VFB Voltage VFB (V)
0.215
0.210
0.205
0.200
0.195
0.190
0.185
-40 -25
0
25
50
Temperature Topt (°C)
75 85
12) Oscillator Frequency vs. Temperature
VIN=3.6V
UVLO Detector Threshold UVLO1 (V)
VIN=3.6V
1.74
1.70
UVLO Released
1.66
1.62
1.58
UVLO Detector
1.54
1.50
-40 -25
0
25
50
Temperature Topt (°C)
13) Maximum duty cycle vs. Temperature
R1218x041A
R1218x041A
VIN=3.6V
1400
99
1350
97
1300
95
Maxduty (%)
Oscillator Frequency fosc (kHz)
VIN=3.6V
1250
1200
1150
1100
93
91
89
87
1050
1000
-40 -25
0
25
50
Temperature Topt (°C)
85
-40 -25
75 85
14) OVP Detector Threshold/Released Voltage vs. Temperature
VIN=3.6V
360
20.0
320
19.5
OVP Detector Threshold
18.5
OVP Released Voltage
17.5
17.0
0
25
50
Temperature Topt (°C)
75 85
Supply Current ICC (μA)
OVP Detector Threshold VOVP1 (V)
16
VIN=3.6V
16.5
-40 -25
75 85
R1218x041A
20.5
18.0
0
25
50
Temperature Topt (°C)
15) Supply Current vs. Temperature
R1218x041A
19.0
75 85
280
240
200
160
120
80
40
0
-40 -25
0
25
50
Temperature Topt (°C)
75 85
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
Lx Current Limit Ilim (mA)
16) LX Current Limit vs. Temperature
2.4
12003.6
5.5
R1218x041A
R1218x041A
514
860
1080
460
675
810
400
515
595
VIN＝1.8V
VIN＝2.4V
VIN＝3.6V
VIN＝5.5V
1000
800
600
400
200
0
-40
-15
10
35
60
85
Temparature Topt (℃)
17) OVP Transient Response (Topt=25°C)
R1218x041A
OVP Detector Threshold VOVP1 (V)
OVP Detector Threshold VOVP1 (V)
R1218x021A
15.0
12.5
OVP Voltage
10.0
7.5
5.0
2.5
0
0
20
40
60
Time (ms)
80
100
80
100
25
OVP Voltage
20
15
10
5
0
0
20
40
60
Time (ms)
80
100
OVP Detector Threshold VOVP1 (V)
R1218x062A
35
OVP Voltage
30
25
20
15
10
5
0
0
20
40
60
Time (ms)
17
＊R1218K (DFN(PLP)1820-6) is the non-promotion product. As of March in 2014.
R1218x
18) Efficiency dependence on inductors (4 LED)
R1218x041A (Intemal Diode Type)
VIN=3.6V
90
Efficiency η (%)
85
80
75
70
65
LQH32CN220K53
LQH32CN100K53
GLF2012T220K
GLF2012T100K
60
55
50
0
18
5
10
15
LED Current lLED (mA)
20
1. The products and the product specifications described in this document are subject to change or
discontinuation of production without notice for reasons such as improvement. Therefore, before
deciding to use the products, please refer to Ricoh sales representatives for the latest information
thereon.
2. The materials in this document may not be copied or otherwise reproduced in whole or in part without
prior written consent of Ricoh.
3. Please be sure to take any necessary formalities under relevant laws or regulations before exporting or
otherwise taking out of your country the products or the technical information described herein.
4. The technical information described in this document shows typical characteristics of and example
application circuits for the products. The release of such information is not to be construed as a
warranty of or a grant of license under Ricoh's or any third party's intellectual property rights or any
other rights.
5. The products listed in this document are intended and designed for use as general electronic
components in standard applications (office equipment, telecommunication equipment, measuring
instruments, consumer electronic products, amusement equipment etc.). Those customers intending to
use a product in an application requiring extreme quality and reliability, for example, in a highly specific
application where the failure or misoperation of the product could result in human injury or death
(aircraft, spacevehicle, nuclear reactor control system, traffic control system, automotive and
transportation equipment, combustion equipment, safety devices, life support system etc.) should first
contact us.
6. We are making our continuous effort to improve the quality and reliability of our products, but
semiconductor products are likely to fail with certain probability. In order to prevent any injury to
persons or damages to property resulting from such failure, customers should be careful enough to
incorporate safety measures in their design, such as redundancy feature, fire containment feature and
fail-safe feature. We do not assume any liability or responsibility for any loss or damage arising from
misuse or inappropriate use of the products.
7. Anti-radiation design is not implemented in the products described in this document.
8. Please contact Ricoh sales representatives should you have any questions or comments concerning
the products or the technical information.
Halogen Free
Ricoh is committed to reducing the environmental loading materials in electrical devices
with a view to contributing to the protection of human health and the environment.
Ricoh has been providing RoHS compliant products since April 1, 2006 and Halogen-free products since
April 1, 2012.
http://www.e-devices.ricoh.co.jp/en/
Sales & Support Offices
RICOH ELECTRONIC DEVICES CO., LTD.
Higashi-Shinagawa Office (International Sales)
3-32-3, Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-8655, Japan
Phone: +81-3-5479-2857 Fax: +81-3-5479-0502
RICOH EUROPE (NETHERLANDS) B.V.
Semiconductor Support Centre
Prof. W.H. Keesomlaan 1, 1183 DJ Amstelveen, The Netherlands
Phone: +31-20-5474-309
RICOH ELECTRONIC DEVICES KOREA CO., LTD.
3F, Haesung Bldg, 504, Teheran-ro, Gangnam-gu, Seoul, 135-725, Korea
Phone: +82-2-2135-5700 Fax: +82-2-2051-5713
RICOH ELECTRONIC DEVICES SHANGHAI CO., LTD.
Room 403, No.2 Building, No.690 Bibo Road, Pu Dong New District, Shanghai 201203,
People's Republic of China
Phone: +86-21-5027-3200 Fax: +86-21-5027-3299
RICOH ELECTRONIC DEVICES CO., LTD.
Taipei office
Room 109, 10F-1, No.51, Hengyang Rd., Taipei City, Taiwan (R.O.C.)
Phone: +886-2-2313-1621/1622 Fax: +886-2-2313-1623