TECHNICAL NOTE Single-chip built-in FET type Switching Regulator Series Simple Step-down Switching Regulator with Integrated Compensation BD9701FP/CP-V5/T/T-V5, BD9703FP/CP-V5/T/T-V5, BD9702CP-V5/T/T-V5 Description The BD9701/BD9703/BD9702 are single-channel step-down switching regulator capable of PWM operation. The Pch MOS FET is built in for high efficiency in small load area. Lower electricity consumption of operating current 4mA (Typ) and stand-by current 0uA(Typ) is realized by adopting Bi-CMOS process. Features 1. Maximum switching current: 1.5A(BD9701/BD9703), 3A(BD9702) 2. Built-in Pch FET ensures high efficiency 3. Output voltage adjustable via external resistors 4. High switching frequency: 100kHz (BD9701), 300kHz(BD9703), 110kHz(BD9702) 5. Overcurrent and thermal shutdown protection circuits built in 6. ON/OFF control via STBY pin 7. Small surface mount TO252-5 package (only BD9701FP, BD9703FP) Applications TVs, printers, DVD players, projectors, gaming devices, PCs, car audio/navigation systems, ETCs, communication equipment, AV products, office equipment, industrial devices, and more. Line Up BD9701FP/CP-V5/T/T-V5 Output Current Input Voltage Switching Frequency External Synchronization Stand-by Function Operating Temperature Package BD9703FP/CP-V5/T/T-V5 1.5A BD9702CP-V5/T/T-V5 3.0A 8 or Vo+3 36V 100kHz (fixed) 300kHz (fixed) 110kHz (fixed) x -40 +85 TO252-5/TO220CP-V5/TO220FP-5/TO220FP-5 (V5) TO220CP-V5/TO220FP-5/TO220FP-5 (V5) Apr.2008 Absolute Maximum Ratings (Ta25) Parameter Symbol Ratings Unit Supply Voltage (VCC-GND) Vcc 36 V STBY-GND VSTBY 36 V OUT-GND VO 36 V INV-GND VINV 10 V Maximum Switching Current BD9701/BD9703 Power Dissipation TO252 1.5 Iout BD9702 3 0.8 (*1) Pd TO220 2(*2) A W Operating Temperature Topr -40+85 Storage Temperature Tstg -55+150 1 Without external heat sink, the power dissipation reduces by 6.4mW/ over 25. 2 Without external heat sink, the power dissipation reduces by 16.0mW/ over 25. Reduced by 160mW/, when mounted on Infinity size heatsink. Operating Conditions(Ta=-40+85) 3 Parameter Symbol Input Voltage Output Voltage Limit Unit MIN TYP MAX VCC 8.0 or Vo+3 (*3) - 35.0 V Vo 1.0 - 32 V The minimum value of an input voltage is the higher either 8.0V or Vo+3 Electrical Characteristics BD9701FP/CP-V5/T/T-V5 (Unless otherwise noted, Ta=25,Vcc=12V,Vo=5V,STBY=3V) Limit Uni Parameter Symbol Conditions t MIN TYP MAX 1.0 1.5 design guarantee Output ON Resistance Ron 86 Efficiency Io0.5A design guarantee 80 100 120 kHz Switching Frequency fosc Vcc=20V, VOLOAD 10 40 mV Load Regulation Io=0.51.5A Vcc=1030V, VOLINE 40 100 mV Line Regulation Io=1.0A Over Current Protection 1.6 A Iocp Limit 0.98 1.00 1.02 V INV Pin Threshold Voltage VINV INV Pin Threshold Voltage VINV - 0.5 - IINV - 1 - A VSTBYON 2.0 - 36 V VSTBYOFF -0.3 - 0.3 V Istby 5 25 50 A STBY=3V Circuit Current Icc - 4 12 mA Stand-by Current Ist - 0 5 A STBY0V Thermal Variation INV Pin Input Current STBY Pin ON Threshold OFF Voltage STBY Pin Input Current 2/14 Tj=085 design guarantee VINV=1.0V This product is not designed to be resistant to radiation. Electrical Characteristics BD9703FP/CP-V5/T/T-V5 (Unless otherwise noted, Ta=25,Vcc=12V,Vo=5V,STBY=3V) Limit Uni Parameter Symbol Conditions t MIN TYP MAX 1.0 1.5 design guarantee Output ON Resistance Ron 86 Io0.5A design guarantee Efficiency 270 300 330 kHz Switching Frequency fosc Load Regulation VOLOAD - 10 40 mV Line Regulation VOLINE - 40 100 mV Iocp 1.6 - - A VINV 0.98 1.00 1.02 V VINV - 0.5 - IINV - 1 - A VSTBYON 2.0 - 36 V VSTBYOFF -0.3 - 0.3 V Istby 5 25 50 A Circuit Current Icc - 5 12 mA Stand-by Current Ist - 0 5 A Over Current Protection Limit INV Pin Threshold Voltage INV Pin Threshold Voltage Thermal Variation INV Pin Input Current STBY Pin ON Threshold OFF Voltage STBY Pin Input Current Vcc=20V, Io=0.51.5A Vcc=1030V, Io=1.0A Tj=085 design guarantee VINV=1.0V STBY=3V STBY0V Electrical Characteristics BD9702FP/CP-V5/T/T-V5 (Unless otherwise noted, Ta=25,Vcc=12V,Vo=5V,STBY=3V) Limit Uni Parameter Symbol Conditions t MIN TYP MAX 0.5 1.5 design guarantee Output ON Resistance Ron 86 Io1A design guarantee Efficiency 88 110 132 kHz Switching Frequency fosc Load Regulation VOLOAD - 10 40 mV Line Regulation VOLINE - 40 100 mV Iocp 3.2 - - A VINV 0.98 1.00 1.02 V VINV - 0.5 - IINV - 1 - A VSTBYON 2.0 - 36 V VSTBYOFF -0.3 - 0.3 V Istby 5 25 50 A Circuit Current Icc - 4 12 mA Stand-by Current Ist - 0 5 A Over Current Protection Limit INV Pin Threshold Voltage INV Pin Threshold Voltage Thermal Variation INV Pin Input Current STBY Pin ON Threshold OFF Voltage STBY Pin Input Current 3/14 Vcc=20V, Io=13A Vcc=1030V, Io=1.0A Tj=085 design guarantee VINV=1.0V STBY=3V STBY0V Characteristic Data BD9701FP/CP-V5/T/T-V5 5 80 70 60 50 110 OSC FREQUENCY : FOSC[Hz] 90 OUTPUT VOLTAGE : VO [V] 6 EFFICIENCY : [%] 100 4 3 2 1 0 40 10 100 0 1000 1 2 3 105 100 95 90 -10 4 OUTPUT CURRENT IOUT : [A] OUTPUT CURRENT : IOUT[A] 10 30 50 Fig.1 Fig.2 Fig.3 EFFICIENCYLOAD CURRENT OCP VCC=20V foscTa 90 5 5.100 5.1 70 AMBIE NT T E MPE RAT URE : T a [ ] VCC=30V 5 4.95 VCC=20V VCC=10V CIRCUIT CURRENT ; [mA] 5.05 OUTPUT VOLTAGE : VO [V] 5.050 5.000 4.950 3 2.5 2 1.5 1 0 4.900 0 200 400 600 800 1000 0 10 20 30 10 40 INPUT VOLTAGE : VCC [V] OUTPUT CURRENT : IOUT[A] 15 20 25 30 35 INPUT VOLTAGE : VCC [V] Fig.4 Fig.5 Fig.6 OUTPUT VOLTAGELOAD CURRENT OUTPUT VOLTAGEINPUT VOLTAGE CIRCUIT CURRENTINPUT VOLTAGE (Vo=5V,Ro=5ohm) NO LOAD 110 OSC FREQUENCY : FOSC[Hz] 3.5 OUTPUT VOLTAGE : VDS[V] 4 3.5 0.5 4.9 3 2.5 2 1.5 1 0.5 0 1.020 105 100 95 90 0 0.5 1 1.5 2 SWITCHING CURRENT : ISW[A] 0 10 20 30 INPUT VOLTAGE : VCC [V] 40 INV THRESHOLD VOLTAGE : VINV[V] OUTPUT VOLTAGE : VO [V] 4.5 1.010 1.000 0.990 0.980 -10 10 30 50 70 90 AMBIENT TEMPERATURE : Ta [] Fig.7 Fig.8 Fig.9 VOUTOUT VOLTAGEDRAIN CURRENT foscINPUT VOLTAGE INV THRESHOLD VOLTAGETa 4/14 Characteristic Data BD9702FP/CP-V5/T/T-V5 AMBIENT TEMPERATURE : Ta [] -10 80 70 60 50 5 4 3 2 1 10 100 1000 0 10000 OUTPUT CURRENT : IOUT[A] 70 110 115 1 2 3 4 5 OUTPUT CURRENT : IOUT[A] 6 Fig.12 EFFICIENCYLOAD CURRENT OCP VCC=20V foscTa 5 OUTPUT VOLTAGE : VO [V] VCC=30V VCC=20V 5.00 4.95 VCC=10V CIRCUIT CURRENT ; [mA] 5.10 5.05 5.05 5.00 4.95 1000 1500 2000 2500 3000 4 3 2 1 0 4.90 500 90 105 Fig.11 4.90 0 OUTPUT CURRENT : IOUT[A] 10 20 30 INPUT VOLTAGE : VCC [V] 10 40 15 20 25 30 35 INPUT VOLTAGE : VCC [V] Fig.13 Fig.14 Fig.15 OUTPUT VOLTAGELOAD CURRENT OUTPUT VOLTAGEINPUT VOLTAGE CIRCUIT CURRENTINPUT VOLTAGE (Vo=5V,Ro=5ohm) NO LOAD 1.02 OSC FREQUENCY : FOSC[Hz] INV THRESHOLD VOLTAGE : VINV[V] 120 2.0 OUTPUT VOLTAGE : VDS[V] 50 Fig.10 5.10 0 30 120 0 40 OUTPUT VOLTAGE : VO [V] ]zH[CSOF : YCNEU QERF CSO OUTPUT VOLTAGE : VO [V] EFFICIENCY : [%] 90 10 100 6 100 115 1.5 1.0 110 0.5 105 0.0 0.5 1 1.5 2 2.5 3 SWITCHING CURRENT : ISW[A] 1.00 0.99 0.98 100 0 1.01 0 10 20 30 INPUT VOLTAGE : VCC [V] 40 -10 10 30 50 70 AMBIENT TEMPERATURE : Ta [] Fig.16 Fig.17 Fig.18 VOUTOUT VOLTAGEDRAIN CURRENT foscINPUT VOLTAGE INV THRESHOLD VOLTAGETa 5/14 90 Characteristic Data BD9703FP/CP-V5/T/T-V5 100 6 80 70 60 50 5 4 3 2 1 0 40 10 100 OUTPUT CURRENT : IOUT[A] 0 1000 2 3 Fig.19 Fig.20 EFFICIENCYLOAD CURRENT OCP VCC=20V 300 285 270 4 -10 foscTa 5 VCC=20V 4.95 VCC=10V 5 CIRCUIT CURRENT ; [mA] OUTPUT VOLTAGE : VO [V] VCC=30V 5.05 5.05 5.00 4.95 4.90 0 200 400 600 800 0 1000 10 30 50 70 90 AMBIENT TEMPERATURE : Ta [] Fig.21 5.10 4.9 10 20 30 4 3 2 1 0 40 10 INPUT VOLTAGE : VCC [V] OUTPUT CURRENT : IOUT[A] 15 20 25 30 INPUT VOLTAGE : VCC [V] 35 Fig.22 Fig.23 Fig.24 OUTPUT VOLTAGELOAD CURRENT OUTPUT VOLTAGEINPUT VOLTAGE CIRCUIT CURRENTINPUT VOLTAGE (Vo=5V,Ro=5ohm) NO LOAD 1.02 OSC FREQUENCY : FOSC[Hz] 1 0.5 INV THRESHOLD VOLTAGE : VINV[V] 330 1.5 OUTPUT VOLTAGE : VDS[V] 1 315 OUTPUT CURRENT : IOUT[A] 5.1 OUTPUT VOLTAGE : VO [V] OSC FREQUENCY : FOSC[Hz] OUTPUT VOLTAGE : VO [V] EFFICIENCY : [%] 90 330 315 300 285 270 0 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 SWITCHING CURRENT : ISW[A] Fig.25 VOUTOUT VOLTAGEDRAIN CURRENT 0 10 20 30 INPUT VOLTAGE : VCC [V] 40 1.01 1.00 0.99 0.98 -10 10 30 50 70 90 AMBIENT TEMPERATURE : Ta [] Fig.26 Fig.27 foscINPUT VOLTAGE INV THRESHOLD VOLTAGETa 6/14 Block Diagram BD9701FP/CP-V5/T/T-V5, BD9703FP/CP-V5/T-V5, BD9702CP-V5/T/T-V5 VCC 1 TO252-5 Package Dimensions (mm) VREF PWM COMP DRIVER OSC STBY 5 STBY CTL LOGIC OUT 2 OCP TSD INV 4 Error AMP TO220CP-V5 Package Dimensions (mm) 3 GND Fig.28 Block Diagram Pin Description Pin No. Pin Name Function 1 VCC Input Power Supply Pin 2 OUT Internal Pch FET Drain Pin 3,FIN(*2) GND Ground 4 INV Output Voltage Feedback Pin 5 STBY ON/OFF Control Pin (*2)FIN is assigned in the case of TO252-5. TO220FP-5(V5) Package Dimensions (mm) TO220FP-5 Package Dimensions (mm) 7/14 Block Function Explanations VREF Generates the regulated voltage from Vcc input, compensated for temperature. OSC Generates the triangular wave oscillation frequency using an internal resistors and capacitor. Used for PWM comparator input. Error AMP This block, via the INV pin, detects the resistor-divided output voltage, compares this with the reference voltage, then amplifies and outputs the difference. PWM COMP Outputs PWM signals to the Driver block, which converts the error amp output voltage to PWM form. DRIVER This push-pull FET driver powers the internal Pch MOSFET, which accepts direct PWM input. STBY Controls ON/OFF operation via the STBY pin. The output is ON when STBY is High. Thermal Shutdown (TSD) This circuit protects the IC against thermal runaway and damage due to excessive heat. A thermal sensor detects the junction temperature and switches the output OFF once the temperature exceeds a threshold value (175deg). Hysteresis is built in (15deg) in order to prevent malfunctions due to temperature fluctuations. Over Current Protection (OCP) The OCP circuit detects the voltage difference between Vcc and OUT by measuring the current through the internal Pch MOSFET and switches the output OFF once the voltage reaches the threshold value. The OCP block is a self-recovery type (not latch). Timing Chart OSC (Internal Oscillation Wave) Error AMP OUTPUT VCC PIN VOLTAGE WAVE OUTPIN VOLTAGE WAVE OUTPUT VOLTAGE WAVE Fig.29 Timing Chart 8/14 Notes for PCB layout C5 R1 : 4kO R2 : 1kO C1 4 INV STBY 5 1 VCC OUT 2 L1 GND C2 5.0V D1 3 C4 C3 Fig.30 Layout * Place capacitors between Vcc and Ground, and the Schottky diode as close as possible to the IC to reduce noise and maximize efficiency. * Connect resistors between INV and Ground, and the output capacitor filter at the same Ground potential in order to stabilize the output voltage. Application component selection and settings Inductor L1 If the winding resistance of the choke coil is too high, the efficiency may deteriorate. As the overcurrent protection operates over minimum 1.6A (BD9701FP/CP-V5/T/T-V5, BD9703FP/CP-V5/T-V5) or 3.2A minimum (BD9701CP-V5/T/T-V5), attention must be paid to the heating of the inductor due to overload of short-circulated load. Note that the current rating for the coil should be higher than IOUT(MAX)IL. Iout (MAX): maximum load current If you flow more than maximum current rating, coil will become overload, and cause magnetic saturation, and those account for efficiency deterioration. Select from enough current rating of coil which doesn't over peak current. VOUT (VCCVOUT) IL = x x 1 fosc L1 VCC L1:inductor value, VCC:maximum input voltage, VOUT:output voltage, IL:coil ripple current value, fosc:oscillation frequency Shottky Barrier Diodes D1 A Schottky diode with extremely low forward voltage should be used. Selection should be based on the following guidelines regarding maximum forward current, reverse voltage, and power dissipation: The maximum current rating is higher than the combined maximum load current and coil ripple current (IL). The reverse voltage rating is higher than the VIN value. Power dissipation for the selected diode must be within the rated level. The power dissipation of the diode is expressed by the following formula: Pdi=Iout(MAX)xVfx(1-VOUT/VCC) Iout (MAX): maximum load current, Vf: forward voltage, VOUT: output voltage, VCC: input voltage Capacitor C1,C2,C3,C4,C5 As large ripple currents flow across C1 and C3 capacitors, high frequency and low impedance capacitor for a switching regulator must be used. The ceramic capacitor C2 must be connected. If not, noise may cause an abnormal operation. If the ripple voltage of input and output is large, C4 selected among ceramic , tantalum and OS capacitor with low ESR may decrease the ripple, however if the only low ESR capacitor is used, an oscillation or unstable operation may be caused. C5 is the capacitor for phase compensation and normally not used. If you need to improve the stability of feedback network, connect C5 between INV and OUTPUT. 9/14 Feed back resistance R1,R2 The offset of output voltage is determined by both Feed back resistance and INV pin input current. VOUT=(R1+R2) VINV/R2 (VINV pin Threshold Votage) If Feed back resistance is high, the setting of output voltage will be move. Recommended : Resistance between INV pin and GND = less than 10k. Recommended Circuit C2 + C1 1 VCC OUT L1 2 5.0V D1 + C3 C4 STBY 5 R1 : 4k C5 INV 4 R2 : 1k 3 GND Fig.31 Recommended Circuit Output Voltage 5V : Application cicuit example (BD9701FP/CP-V5/T/T-V5) Recommended Components (Example) Inductor L110H Schottky Diode D1 Capacitor C1100F(50V) C2OPEN C3220F(25V) C4OPEN C5OPEN Recommended Components example 2 Inductor L1100H Schotky Diode D1 Capacitor C1220F(25V) C21.0F(50V) C3470F(16V) C4150F(20V) C3OPEN :CDRH127/LD (sumida) :RB050LA-40 (ROHM) :Al electric capacitor UHD1H101MPT (nichicon) :Al electric capacitor UHD1E221MPT (nichicon) :CDRH127/LD (sumida) :RB050LA-40 (ROHM) :Al electric capacitor UVR1H221MPA (nichicon) :ceramic cap UMK212F105ZG (TAIYO YUDEN) :Al electric capacitor UVR1E471MPA (nichicon) :OS capacitor 20SVP150M (SANYO) 10/14 (BD9703FP/CP-V5/T/T-V5) Recommended Components Inductor L147H Schotky Diode D1 Capacitor C1100F(50V) C22.2F(50V) C3470F(25V) C4OPEN C3OPEN :CDRH127/LD (sumida) :RB050LA-40 (ROHM) :Al electric capacitor UHD1H101MPT (nichicon) :ceramic cap CM43X7R225K50A (KYOCERA) :Al electric capacitor UHD1E471MPT (nichicon) (BD9702CP-V5/T/T-V5) Recommended Components Inductor L147H Schotky Diode D1 Capacitor C11000F(50V) C2OPEN C31000F(25V) C4OPEN C3OPEN :CDRH127/LD (sumida) :RB050LA-40 (ROHM) :Al electric capacitor UHD1H102MPT (nichicon) :Al electric capacitor UHD1E102MPT (nichicon) Test Circuit Vcc 1 OUT 2 GND INV 4 3 SW2 + STBY 5 SW4 A I INV Icc A SW5 A ISTB 1k Vcc 2k V INV + f VSTB SW6 V Vo Io Fig.32 Input Output Measurement Circuit 11/14 I/O Equivalent Circuit Pin 1 (Vcc), Pin 3 (GND) Pin 2 (OUT) Pin 4 (INV) Pin 5 (STBY) VCC VCC VCC VCC STB 140K OUT 300 INV 60K GND 70K Fig.33 Input Output Equivalent Circuit Operation Notes 1. Absolute Maximum Ratings Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range may result in IC deterioration or damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such damage is suffered. A physical safety measure such as a fuse should be implemented when use of the IC in a special mode where the absolute maximum ratings may be exceeded is anticipated. 2. GND voltage Ensure a minimum GND pin potential in all operating conditions. In addition, ensure that no pins other than the GND pin carry a voltage lower than or equal to the GND pin, including during actual transient phenomena. 3. Thermal design Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions. 4. Inter-pin shorts and mounting errors Use caution when orienting and positioning the IC for mounting on printed circuit boards. Improper mounting may result in damage to the IC. Shorts between output pins or between output pins and the power supply and GND pin caused by the presence of a foreign object may result in damage to the IC. 5. Operation in strong electromagnetic field Operation in a strong electromagnetic field may cause malfunction. 6. Thermal shutdown circuit (TSD circuit) This IC incorporates a built-in thermal shutdown circuit (TSD circuit). The TSD circuit is designed only to shut the IC off to prevent runaway thermal operation. Do not continue to use the IC after operating this circuit or use the IC in an environment where the operation of the thermal shutdown circuit is assumed. 7. Testing on application boards 12/14 When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to stress. Always discharge capacitors after each process or step. Ground the IC during assembly steps as an antistatic measure, and use similar caution when transporting or storing the IC. Always turn the IC's power supply off before connecting it to or removing it from a jig or fixture during the inspection process. 8. IC pin input This IC is a monolithic IC which (as below) has P+ substrate and betweenthe various pin. A P-N junction is formed from this P layer of each pin. For example the relation between each potential is as follows. (When GND > PinB and GND > PinA, the P-N junction operates as a parasitic diode.) Parasitic diodes can occur inevitably in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits as well as operation faults and physical damage. Accordingly, you must not use methods by which parasitic diodes operate, such as applying a voltage that is lower than the GND(P substrate)voltage to an input pin. (PinB) (PinA) Transistor (NPN) Resistance substrate Parasitic diode substrate GND Parasitic diode (PinB) (PinA) Parasitic diode GND GND Other adjacent components Parasitic diode Fig.34 Simplified structure of a Bipolar IC 9. Common impedance Power supply and ground wiring should reflect consideration of the need to lower common impedance and minimize ripple as much as possible (by making wiring as short and thick as possible or rejecting ripple by incorporating inductance and capacitance). 10. Pin short and mistake fitting Do not short-circuit between OUT pin and VCC pin, OUT pin and GND pin, or VCC pin and GND pin. When soldering the IC on circuit board, please be unusually cautious about theorientation and the position of the IC. Bypass diode Back current prevention diode VCC Output Pin Fig.35 11. Application circuit 13/14 Although we can recommend the application circuits contained herein with a relatively high degree of confidence, we ask that you verify all characteristics and specifications of the circuit as well as performance under actual conditions. Please note that we cannot be held responsible for problems that may arise due to patent infringements or noncompliance with any and all applicable laws and regulations. 12. Operation The IC will turn ON when the voltage at the STBY pin is greater than 2.0V and will switch OFF if under 0.3V. Therefore, do not input voltages between 0.3V and 2.0V. Malfunctions and/or physical damage may occur. Power Dissipation TO252-S (4) 4.80W POWER DISSIPATION : Pd [W] 5 (1) No heat sink (2) 2layer PCB 4 (Copper laminate area 15 mmx15mm) (3) 3.50W (3) 2layer PCB (Copper laminate area 70 mmx70mm) 3 (4) 4layer PCB (2) 1.85W 2 (Copper laminate area 70 mmx70mm) (1) 0.80W 1 0 0 25 50 75 85 100 AMBIENT TEMPERATURE : Ta[C] Fig.36 125 150 TO220 15 (1) No heat sink POWER DISSIPATION : Pd [W] (2) Aluminum heat sink 50x50x2 (mm3) (3) 11.0W (3) Aluminum heat sink 10 100x100x2 (mm3) (2) 6.5W 5 (1) 2.0W 0 0 25 50 75 100 125 AMBIENT TEMPERATURE : Ta[C] Fig.37 14/14 150 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of which would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM cannot be held responsible for any damages arising from the use of the products under conditions out of the range of the specifications or due to non-compliance with the NOTES specified in this catalog. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact your nearest sales office. ROHM Customer Support System www.rohm.com Copyright (c) 2008 ROHM CO.,LTD. THE AMERICAS / EUROPE / ASIA / JAPAN Contact us : webmaster@ rohm.co. jp 21 Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan TEL : +81-75-311-2121 FAX : +81-75-315-0172 Appendix1-Rev2.0