R1223N152F-TR-FE

R1223N SERIES PWM/VFM step-down DC/DC Controller NO.EA-065-181003 OUTLINE The R1223N Series are CMOS-based PWM step-down DC/DC Converter controllers with low supply current. Each of these ICs consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, a protection circuit, a PWM/VFM alternative circuit, a chip enable circuit, and resistors for voltage detection. A low ripple, high efficiency step-down DC/DC converter can be easily composed of this IC with only four external components, or a power-transistor, an inductor, a diode and a capacitor. With a PWM/VFM alternative circuit, when the load current is small, the operation is automatically switching into the VFM oscillator from PWM oscillator, therefore the efficiency at small load current is improved. The R1223NxxxB type, which is without a PWM/VFM alternative circuit, is also available. If the term of maximum duty cycle keeps on a certain time, the embedded protection circuit works. There are two types of protection function. One is latch-type protection circuit, and it works to latch an external Power MOSFET with keeping it disable. To release the condition of protection, after disable this IC with a chip enable circuit, enable it again, or restart this IC with power-on. The other is Reset-type protection circuit, and it works to restart the operation with soft-start and repeat this operation until maximum duty cycle condition is released. Either of these protection circuits can be designated by users' request. FEATURES • • • • • • • • • • Input Voltage Range .................................................... 2.3V to 13.2V Output Voltage Range.................................................. 1.5V to 5.0V (0.1V step) Output Voltage Accuracy.............................................. ±2.0% Oscillator Frequency ....................................................300kHz, 500kHz High Efficiency ............................................................. Typ. 90% Standby Current ........................................................... Typ. 0µA Temperature-Drift Coefficient of Output Voltage .......... Typ. ±100ppm/°C Built-in Soft-start Circuit Built-in Latch-type or Reset type Protection Circuit Package ....................................................................... SOT-23-5 APPLICATION • Power source for hand-held communication equipment, cameras, video instruments such as VCRs, camcorders. • Power source for battery-powered equipment. • Power source for household electrical appliances. 1 R1223N BLOCK DIAGRAM OSC VIN VOUT EXT Vref PWM/VFM CONTROL Protection Soft Start Chip Enable CE GND SELECTION GUIDE In the R1223N Series, the output voltage, the oscillator frequency, switching mode and type of short protection (Latch or Reset) for the IC are selectable at the user’s request. Product Name Package Quantity per Reel Pb Free Halogen Free R1223Nxx2∗-TR-FE SOT-23-5 3,000pcs Yes Yes xx : The output voltage can be designated in the range from 1.5V(15) to 5.0V(50) in 0.1V*1 steps. ∗ : Designation of the oscillator frequency, switching mode and type of short protection. A) 300kHz, with a PWM/VFM alternative circuit, Latch-type protection B) 500 kHz, with a PWM/VFM alternative circuit, Latch-type protection C) 300kHz, without a PWM/VFM alternative circuit, Latch-type protection D) 500kHz, without a PWM/VFM alternative circuit, Latch-type protection E) 300kHz, with a PWM/VFM alternative circuit, Reset-type protection F) 500 kHz, with a PWM/VFM alternative circuit, Reset-type protection G) 300kHz, without a PWM/VFM alternative circuit, Reset-type protection H) 500kHz, without a PWM/VFM alternative circuit, Reset-type protection 2 R1223N PIN CONFIGURATION PIN DESCRIPTION z SOT-23-5 5 z SOT-23-5 4 Pin No Symbol 1 CE 2 GND Ground Pin Input Pin 3 VOUT Pin for Monitoring Output Voltage 4 EXT External Transistor Drive Pin 5 VIN (mark side) 1 2 3 Pin Description Chip Enable Pin Power Supply Pin ABSOLUTE MAXIMUM RATINGS (GND=0V) Symbol Rating Unit 15 V VIN VIN Supply Voltage VEXT EXT Pin Output Voltage -0.3 to VIN + 0.3 V VCE CE Pin Input Voltage -0.3 to VIN + 0.3 V VOUT VOUT Pin Input Voltage -0.3 to VIN + 0.3 V IEXT EXT Pin Inductor Drive Output Current ±25 mA 420 mW 1 PD *1 Item Power Dissipation (Standard Test Land Pattern)* Topt Operating Temperature Range -40 to 85 °C Tstg Storage Temperature Range -55 to 125 °C For Power Dissipation and Standard Test Land Pattern, 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. 3 R1223N ELECTRICAL CHARACTERISTICS • R1223Nxx2A (,C,E,G) Output Voltage : Vo Symbol *,1 *287 ∆*287∆
%  ∆% ∆
Conditions (&!* ( !!* ( !!* (
)!%%   +1!"   +1!"
)!%% *,1G*&(G*E#*' *× &287G5), 5#9F C5=≤
≤F8= *,1G*&(G*E#*' &287G55), "! &(;7+ $D
A6B!!! &(;7/ $D
A3B!!! &&(+ $A6B&!! &&(/ $A3B&!! *&(+ $A6B&!* ( *,1GF*'*287G5*→#8* *&(/ $A3B&!* ( *,1GF*'*287G#8*→5*

 *,1G#*'*&(G5*'*287G5* *,1GF*'*(;7GI#9*'*287GF*' *&(GF* *,1GF*'*(;7G5#*'*287G5*' *&(GF* *287G#* 55 Unit # * *× #5 5#8 )= H5 := ;, 5#5 5#8 ;, 5 H ), 5 ), 5#8 5#5 ;, ;, # 5#F * * 55  "%,'$  /67 H5 5#F 5# * 55 5#5 *287G#* "  %! 5 *,1G#*'*&(G#*' *,1G#*'*&(G5*' * Max. )-)!)!"" !  ( ")%!'2%$    4   ! /      %  #
%   !!!  (%%  ) '!)"/ )  !# • - )       &))7)  &#&! ' ! *287))!)#,)/ !%% (!(% ! "(#, ( (!%  !(% ! "' !%*287#&%)%% ! " (' (  %  ! "%&% !!  (!#
 )"! !  %&# • J  "%;+)%*287'((%1!"   !  !) #))"!!     (    )!   (!! (#
  ! )"  / ( ( (" !-    %%# •  !  !%% " )    (  ! )(  !#,% !%!%! -) " ) '&/;)"-  ! )-)!)()-)!) (# J !!# • J % /""( ( ' " !"# • !  &!*,1 (  ))!)( (# ✩
%)% !! ! ( & -) " ! ! # "  % ! #&! ' ( ! " 8 R1223N  !  !  ('!'%)'. &-   ! # OPERATION of step-down DC/DC converter and Output Current
 ( ("!3-    ' (  ("%)!3-   ++   ("  '  !! ( ! ( #
 - %% (() ? i1 IOUT Lx Tr L VOUT VIN IL ILmax ILmin topen i2 SD CL ton toff T=1/fosc ?3-
! !&32G4%  '(" (3#, ))'&3  %) &3)2G54&3)-)24%3;
# ?3-
! %%' /"2 4! 3) &3&3)-'!&32G4 %  # ?&3  (! " &3)%)%' ! %%' !!  )' - "    % &3 )   5 !  %% )    !(# &    ' &3  !  %) &3)2K54# & %  " )'!! ( )" ()24'   %1!"2% 4() # • Discontinuous Conduction Mode and Continuous Conduction Mode
)-)!) !2&3)-4))!) !2&3)4%!%  !(!  )  3-
   %%#
%%&3)-&3)'  "∆&> ∆&G&3)-&3)G*287×3G2*,1*2874×3################################################################################ $1! 
G% GE%% !"2:4G
×55G×% ×55 ≤%% 9 R1223N &$1!'*287×32*,1*2874×3  " (%! ' (%!%% # !!!2&2874   " ) 'L%%  ! ()#&  ' (" (!!()%  (  "!() %%%'%&3)) 72&3)G54#&287 (! " '! "')  %%2G%%4'&287 %! '&3))  (72&3)K54#
%)) %  !! ) ) % !! )# &!! )'$1!   % !)  ! ' G
×*287*,1 ######################################################################################################################################### $1! L')  !! )'G') !! )# Output Current and Selection of External Components 3-
  ? 2' ! !   &53'   %3D
   3!   %!   /#4 *,1G*287E23E/4×&287E3×&53 ######################################################################################################### $1! 3-
 ++? 3×&53%%G*)E*287E/×&287 #################################################################################################################### $1!C !$1!C$1!  % !"'2%%E4G21' 21G2*287E*)E/×&28742*,1E*)3×&2874############################################################################################# $1!8  !  %  > &53G2*,1*2873×&287/×&2874×21%3#################################################################################################### $1!H '/!%  !(3'3-
'   %  > &3)-G&287E&53 ####################################################################################################################################### $1!I  &3)-'%!!!  - ) # 10 R1223N ★
-   !   !! )# External Components 1. Inductor  !/! -&3)-#&% (!  !%  ')(  !! )/ %)%%" #  !  )' )  !%3 ! ' ( ! #   !  ( !  ) '%'% (!!!' %%" ! (! ( !%3 # 2. Diode J  *)2 /"" ))#4( ( #   (( ! )*,1!( ! 1! )&3)-# 3. Capacitor , %,1'!  $ 2$1!     4"%  5;+%   # 287! %!!* ('%CI55;+ !)" ))# 4. Lx Transistor  +$
 1!% &# & / (( ! ! % (&!* (# & %&!* (  '! +$
)  "'   +$
    (# &% ( !  "%"! )'  +$
     %(%%"# &% )  ! ) " "%"! '  +$
 ("%( %%"# -)!)!! !% +$
 !  (/!'&3)-# 11 R1223N TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current R1223N332H R1223N152H L=27µH 1.530 3.400 3.360 12V 3.340 8V 3.320 4.5V Output Voltage VOUT(V) Output Voltage VOUT(V) 3.380 3.300 3.280 3.260 3.240 1.520 1.510 1.500 13.2V 1.490 8V 5V 1.480 3.220 3.200 1E-05 0.0001 0.001 0.01 0.1 2.3V 1.470 1E-05 1 0.0001 0.01 0.1 1 Efficiency vs. Output Current CD104-27µH Si3443DV R1223N332A(VIN=12V) 100 100 90 90 80 80 70 70 Efficiency η(%) Efficiency η(%) R1223N332A(VIN=4.5V) 60 50 40 30 50 40 30 20 10 10 1 10 100 0 0.1 1000 Output Current IOUT(mA) CD104-27µH Si3443DV 100 90 90 80 80 70 70 60 50 40 30 30 10 Output Current IOUT(mA) 1000 CD104-27µH Si3443DV 40 20 100 1000 50 10 10 100 60 20 1 10 R1223N332B(VIN=12V) 100 0 0.1 1 Output Current IOUT(mA) Efficiency η(%) Efficiency η(%) R1223N332B(VIN=4.5V) CD104-27µH Si3443DV 60 20 0 0.1 12 0.001 Output Current IOUT(A) Output Current IOUT(A) 2) L=27µH 0 0.1 1 10 100 Output Current IOUT(mA) 1000 R1223N CD104-27µH Si3443DV R1223N332C(VIN=12V) CD104-27µH Si3443DV 100 100 90 90 80 80 70 70 Efficiency η(%) Efficiency η(%) R1223N332C(VIN=4.5V) 60 50 40 30 60 50 40 30 20 20 10 10 0 0.1 1 10 100 0 0.1 1000 Output Current IOUT(mA) CD104-27µH 100 90 90 80 80 70 70 Efficiency η(%) Efficiency η(%) 100 60 50 40 30 40 30 10 10 100 0 0.1 1000 Output Current IOUT(mA) CD104-27µH 90 80 80 70 70 Efficiency η(%) Efficiency η(%) 100 90 60 50 40 30 1000 40 30 20 10 100 1000 CD104-27µH Si3443DV 50 10 Output Current IOUT(mA) 100 60 20 10 10 R1223N502B(VIN=12V) 100 1 1 Output Current IOUT(mA) R1223N502B(VIN=6.0V) Si3443DV 0 0.1 1000 50 20 10 100 60 20 1 10 R1223N502A(VIN=12V) CD104-27µH Si3443DV R1223N502A(VIN=6.0V) Si3443DV 0 0.1 1 Output Current IOUT(mA) 0 0.1 1 10 100 1000 Output Current IOUT(mA) 13 R1223N R1223N502C(VIN=6.0V) CD104-27µH 100 90 90 80 80 70 70 Efficiency η(%) Efficiency η(%) 100 60 50 40 30 60 50 40 30 20 20 10 10 0 0.1 1 10 100 0 0.1 1000 Ripple Voltage vs. Output Current L=27µH R1223N332A 1000 L=27µH 180 VIN4.5V 180 VIN6V 160 VIN8V 160 VIN8V 140 VIN12V 140 VIN12V Ripple Voltage VRPP(mV) Ripple Voltage VRPP(mV) 100 200 120 100 80 60 40 20 120 100 80 60 40 20 0 0 1 10 100 1 1000 R1223N332B 10 100 1000 Output Current IOUT(mA) Output Current IOUT(mA) L=27µH R1223N332H L=27µH 200 200 180 VIN4.5V 160 Ripple Voltage VRPP(mV) Ripple Voltage VRPP(mV) 10 R1223N502A 200 VIN8V 140 VIN12V 120 100 80 60 40 20 180 VIN6V 160 VIN8V 140 VIN12V 120 100 80 60 40 20 0 1 10 100 Output Current IOUT(mA) 14 1 Output Current IOUT(mA) Output Current IOUT(mA) 3) CD104-27µH Si3443DV R1223N502C(VIN=12V) Si3443DV 1000 0 1 10 100 Output Current IOUT(mA) 1000 R1223N L=27µH R1223N332C 180 VIN4.5V 180 VIN6V 160 VIN8V 160 VIN8V 140 VIN12V 140 VIN12V Ripple Voltage VRPP(mV) Ripple Voltage VRPP(mV) 200 120 100 80 60 40 20 120 100 80 60 40 20 0 0 1 10 100 1000 1 Output Current IOUT(mA) 4) Oscillator Frequency vs. Input Voltage L=27µH R1223N152B Oscillator Frequency fosc(kHz) 1000 L=27µH R1223N152A Oscillator Frequency fosc(kHz) 400 300 200 100 0 5 10 500 400 300 200 100 0 15 0 Output Voltage vs. Input Voltage R1223N152B 5 10 15 Intput Voltage VIN(V) Intput Voltage VIN(V) L=27µH L=27µH R1223N152A 1.53 1.53 1.52 1.52 Output Voltage VOUT(V) Output Voltage VOUT(V) 100 600 500 0 10 Output Current IOUT(mA) 600 5) L=27µH R1223N502C 200 1.51 1.50 1.49 1.48 1.47 1.51 1.50 1.49 1.48 1.47 0 5 10 Intput Voltage VIN(V) 15 0 5 10 15 Intput Voltage VIN(V) 15 R1223N R1223N332A L=27µH 3.36 3.34 3.34 Output Voltage VOUT(V) Output Voltage VOUT(V) R1223N332B 3.36 3.32 3.30 3.28 3.26 3.32 3.30 3.28 3.26 3.24 3.24 0 5 10 15 0 Intput Voltage VIN(V) 6) L=27µH Output Voltage vs. Temperature R1223N332H 5 10 15 Intput Voltage VIN(V) L=27µH VIN=4.5V L=27µH VIN=2.7V R1223N152B 1.51 3.33 Output Voltage VOUT(V) Output Voltage VOUT(V) 3.32 3.31 3.30 3.29 1.50 1.49 1.48 3.28 3.27 -50 0 50 1.47 -50 100 50 100 Temperature Topt (°C) Temperature Topt (°C) 7) 0 Oscillator Frequency vs. Temperature R1223N252A L=27µH VIN=3.7V L=27µH VIN=4.5V R1223N332B 360 Oscillator Frequency fosc(kHz) Oscillator Frequency fosc(kHz) 600 340 320 300 280 260 240 -50 0 50 Temperature Topt (°C) 16 100 550 500 450 400 -50 0 50 Temperature Topt (°C) 100 R1223N 8) Supply Current vs. Temperature R1223N332G R1223N332H 140 100 130 Supply Current1(µA) Supply Current1(µA) 90 80 VIN15V 70 VIN13.2V 60 120 VIN15V 110 VIN13.2V 100 VIN8V 90 80 VIN8V 70 50 -50 0 50 60 -50 100 Temperature Topt (°C) 9) 0 50 100 Temperature Topt (°C) Soft-start time vs. Temperature 10 16 14 8 12 Soft-start Time (msec) Soft-start Time (msec) L=27µH VIN=4.5V R1223N332B L=27µH VIN=3.7V R1223N252A 10 8 6 4 6 4 2 2 0 -50 0 50 0 -50 100 Temperature Topt (°C) R1223N332B 5.0 4.0 4.5 3.5 Delay Time for Latch-type Protection(msec) Delay Time for Latch-type Protection(msec) 100 Temperature Topt (°C) 10) Delay Time for Latch-type protection vs. Temperature R1223N252A VIN=3.7V 4.0 3.5 3.0 2.5 2.0 1.5 1.0 VIN=4.5V 3.0 2.5 2.0 1.5 1.0 0.5 0.5 0.0 -50 50 0 0 50 Temperature Topt (°C) 100 0.0 -50 0 50 100 Temperature Topt (°C) 17 R1223N 5 4 4 3 2 1 0 -50 0 50 100 12) EXT “H” Output Current vs. Temperature R1223N332B 16 EXT"H" Output Current(mA) 14 12 10 8 6 4 2 0 -50 0 50 100 Temperature Topt (°C) 13) EXT “L” Output Current vs. Temperature R1223N332B EXT"L" Output Current(mA) 30 25 20 15 10 5 0 -50 0 50 Temperature Topt (°C) VIN=4.5V 3 2 1 0 -50 0 50 Temperature Topt (°C) Temperature Topt (°C) 18 R1223N332H 5 Delay Time for Reset-type Protection(msec) Delay Time for Reset-type Protection(msec) 11) Delay Time for Reset-type Protection vs. Temperature R1223N332G VIN=4.5V 100 100 R1223N 14) Load Transient Response VIN=5V L=27µH R1223N332A 3.4 3.3 3.2 3.1 3 500 Output Voltage VOUT(V) Output Voltage VOUT(V) R1223N332A 3.6 3.5 3.4 3.3 500 Output Current IOUT(mA) Output Current IOUT(mA) 0 0.0002 0.0004 0.0006 0.0008 0.1 0.001 0 VIN=5V L=27µH R1223N332B 3.4 3.3 3.2 3.1 3 500 Output Voltage VOUT(V) Output Voltage VOUT(V) 0.1 0.05 3.5 3.4 3.3 500 Output Current IOUT(mA) 0.0002 0.0004 0.0006 0.0008 0.1 0.001 0 R1223N332C Output Voltage VOUT(V) Output Voltage VOUT(V) VIN=5V L=27µH 3.4 3.3 3.2 3.1 3 2.9 0.0006 Time (sec) 0.0008 0.1 0.001 VIN=5V L=27µH 3.4 3.3 3.2 Output Current IOUT(mA) 0.0004 0.1 3.5 Output Current IOUT(mA) 0.0002 0.1 3.6 500 2.8 0 0.05 Time (sec) Time (sec) R1223N332C VIN=5V L=27µH 3.6 Output Current IOUT(mA) 0 0.1 Time (sec) Time (sec) R1223N332B VIN=5V L=27µH 0 0.05 500 0.1 0.1 Time (sec) 19 R1223N VIN=5V L=27µH R1223N332C 3.4 3.3 3.2 3.1 3 500 2.9 Output Voltage VOUT(V) Output Voltage VOUT(V) R1223N332D 3.6 3.5 3.4 3.3 3.2 500 0.0002 0.0004 0.0006 0.0008 Output Current IOUT(mA) Output Current IOUT(mA) 0 0.1 0.001 0 0.1 0.1 0.05 Time (sec) Time (sec) 15) Turn-on Waveform R1223N332A(VIN=10V,IOUT=0mA) R1223N332A(VIN=5V,IOUT=0mA) L=27µH 3.5 3 2.5 2 1.5 1 0.5 0 10 0.01 3.5 3 2.5 2 1.5 1 0.5 0 5 CE Voltage(V) CE Voltage(V) 0 Output Voltage VOUT(V) Output Voltage VOUT(V) L=27µH -0.01 0 -0.01 0.02 0 0.01 L=27µH 3.5 3 2.5 2 1.5 1 0.5 0 10 20 3.5 3 2.5 2 1.5 1 0.5 0 5 CE Voltage(V) CE Voltage(V) 0.01 Output Voltage VOUT(V) Output Voltage VOUT(V) L=27µH Time (sec) 0.02 R1223N332B(VIN=5V, IOUT=0mA) R1223N332B(VIN=10V, IOUT=0mA) 0 0 Time (sec) Time (sec) -0.01 VIN=5V L=27µH 0 0.02 -0.01 0 0.01 Time (sec) 0 0.02 R1223N R1223N332A(VIN=5V, IOUT=100mA) R1223N332A(VIN=10V, IOUT=100mA) L=27µH 3.5 3 2.5 2 1.5 1 0.5 0 10 0 0.01 3.5 3 2.5 2 1.5 1 0.5 0 5 CE Voltage(V) CE Voltage(V) -0.01 Output Voltage VOUT(V) Output Voltage VOUT(V) L=27µH 0 0.02 -0.01 0 Time (sec) 0.01 R1223N332B(VIN=5V, IOUT=100mA) L=27µH 3.5 3 2.5 2 1.5 1 0.5 0 10 3.5 3 2.5 2 1.5 1 0.5 0 5 CE Voltage(V) CE Voltage(V) 0.01 Time (sec) Output Voltage VOUT(V) Output Voltage VOUT(V) L=27µH 0 0.02 Time (sec) R1223N332B(VIN=10V, IOUT=100mA) -0.01 0 0 0.02 -0.01 0 0.01 0 0.02 Time (sec) 21 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. The X-ray exposure can influence functions and characteristics of the products. Confirm the product functions and characteristics in the evaluation stage. 9. WLCSP products should be used in light shielded environments. The light exposure can influence functions and characteristics of the products under operation or storage. 10. There can be variation in the marking when different AOI (Automated Optical Inspection) equipment is used. In the case of recognizing the marking characteristic with AOI, please contact Ricoh sales or our distributor before attempting to use AOI. 11. 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. https://www.e-devices.ricoh.co.jp/en/ Sales & Support Offices Ricoh Electronic Devices Co., Ltd. Shin-Yokohama Office (International Sales) 2-3, Shin-Yokohama 3-chome, Kohoku-ku, Yokohama-shi, Kanagawa, 222-8530, Japan Phone: +81-50-3814-7687 Fax: +81-45-474-0074 Ricoh Americas Holdings, Inc. 675 Campbell Technology Parkway, Suite 200 Campbell, CA 95008, U.S.A. Phone: +1-408-610-3105 Ricoh Europe (Netherlands) B.V. Semiconductor Support Centre Prof. W.H. Keesomlaan 1, 1183 DJ Amstelveen, The Netherlands Phone: +31-20-5474-309 Ricoh International B.V. - German Branch Semiconductor Sales and Support Centre Oberrather Strasse 6, 40472 Düsseldorf, Germany Phone: +49-211-6546-0 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 Shanghai Co., Ltd. Shenzhen Branch 1205, Block D(Jinlong Building), Kingkey 100, Hongbao Road, Luohu District, Shenzhen, China Phone: +86-755-8348-7600 Ext 225 Ricoh Electronic Devices Co., Ltd. Taipei office Room 109, 10F-1, No.51, Hengyang Rd., Taipei City, Taiwan Phone: +886-2-2313-1621/1622 Fax: +886-2-2313-1623