1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX Jan. 2010 ◆General description ◆Package Package name: TO252-5 SI-8008TMX attains an oscillation frequency of 300kHz, and has an integrated miniaturized choke coil, allowing it to serve as a high efficiency power supply in a compact TO252-5 (equivalent to SC-63). SI-8008TMX regulators provides various features and protection functions (overcurrent and thermal protection) which are necessary for switching regulators. Only 6 external components are required, and provides high efficiency switching regulation without any need for adjustment. Device supplies 1.5A output current in a compact surface mount package. ◆ Specification ◆Applications DVD recorder, FPD TV OA equipment (printers, etc) On-board local power supplies, Input voltage Output current Output voltage Efficiency (MAX) SI-8008TMX (variable type) 43V 0 - 1.5A 0.8V±2% (reference voltage) 81% (5V output) ◆Features High efficiency 81% (VIN=15V, Io=0.5A) Shutdown supply current: 1μA(MAX) Requires only 6 discrete components Built-in reference oscillator (Oscillating frequency:300kHz(TYP) Built-in drooping-type-overcurrent and protection circuits ●Built-in on-off pin (Active Hi) Off in open Typical application circuit 1 VIN IN SW SI-8008TM SI-8008TMX C1 220uF Vc 5 GND 3 L 47uH 2 ADJ 4 VO R1 Di R2 IADJ C2 470uF C1：220μF C2：470μF L1：47μH Di：SJPB-H6 (Sanken) GN D GND Sanken Electric Co., Ltd. 1/13 thermal 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX 1. Jan. 2010 Scope This specification shall apply to the IC SI-8008TMX for buck switching regulator 2. Outline Semiconductor integrated circuits (monolithic IC) Type Structure Application 3. Resin molding type (transfer molding) ・ DC regulated power supplies ・ Telecommunication on-board local power supplies ・ OA equipment ・ Stabilization of secondary output voltage of switching regulator Absolute maximum ratings 3.1 Absolute maximum ratings Item Input voltage Output ON/OFF control pin voltage Symbol VIN VC Ratings 43 VIN Unit V V Allowable dissipation 1 PD1 1.06 W Allowable dissipation 2 PD2 1.65 W Junction temperature Tj −30 - 150 °C Storage temperature Thermal resistance (junction – case) Tstg θj-c −40 - 150 6 °C °C /W Thermal resistance (junction – ambient) θj-a 95 °C /W Conditions Glass epoxy board mounting (900mm2, copper foil area 4.3%) Glass epoxy board mounting (900mm2, copper foil area 50%) The product incorporates the thermal shut down circuit, and it may operate when the junction temperature exceeds 130°C. It is recommended to design below 125°C for the junction temperature in operation. Glass epoxy board mounting (900mm2, copper foil area 4.3%) 3.2 Recommended operation conditions Item Ratings Symbol Unit MIN MAX Input voltage range VIN Vo+3 *1 40 V Output voltage range VO 0.8 - 24 V Output current range IOUT 0 - 1.5 A Junction temperature range in operation TjOP −20 - 100 °C Operation temperature range TOP −20 - 85 °C *1 The minimum value of input voltage range is 4.5V or VO + 3V whichever higher. IOUT=1A (MAX) when VIN= VO+2 - VO+3V. *2 It is necessary to use within the thermal derating curve (refer to 4－3). Sanken Electric Co., Ltd. 2/13 Conditions IO=0 - 1.5A VIN≧VO+3V *2 *2 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX 4. Jan. 2010 Electrical characteristics 4.1 Electrical characteristics (Ta=25°C, VOUT=5V, Item Reference voltage Reference voltage temperature Efficiency *3 Switching frequency Line regulation Load regulation Over current protection starting current ON/OFF control voltage (output ON) ON/OFF control ON/OFF pin *4 voltage (output OFF) ON/OFF control current (output ON) Shutdown Supply Current 1 R1=4.2kΩ, R2=0.8kΩ) Ratings Symbol MIN TYP MAX VADJ 0.784 0.800 0.816 Unit V ⊿VADJ/⊿T ±0.1 mV/°C η fO VLine VLoad 81 300 60 10 % kHz mV mV 80 40 IS 1.6 A VC、IH 2.0 V VC、IL IC,IH 8 Iq 6 0.8 V 20 μA Conditions VIN=15V，IO=0.1A VIN=15V, IO=0.1A, Tc=0 - 100°C VIN=15V, IO=0.5A VIN=15V, IO=0.5A VIN=10 - 30V, IO=0.5A VIN=15V, IO=0.2 - 1.5A VIN=15V VC=2V mA VIN=15V, IO=0A VIN=15V Shutdown Supply Current 2 Iq(off) 1 μA VC=0V *3 Efficiency should be calculated by using the following equation: Efficiency should be calculated by using the V ･I following equation: η(%)= VIO ･IO ×100 N IN *4 Output control pin Vc turns off in open. Each input level is equivalent to LS-TTL. Therefore the direct drive by LS-TTL is available. Sanken Electric Co., Ltd. 3/13 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX Jan. 2010 4.2 Typical characteristics (Ta=25°C) (1) Efficiency SI-8008TMX Efficiency SI-8008TM Io－効率 Vout=1v設定 R1=0.2kΩ,R2=0.8kΩ 60 55 効率 % Efficiency % 50 Vin=5v Vin=10v 45 40 35 30 0 0.2 0.4 0.6 0.8 Iout A 1 1.2 1.4 1.6 SI-8008TMX SI-8008TM Io－効率 Efficiency Vout=3.3v設定 R1=2.5kΩ,R2=0.8kΩ 85 80 効率 % Efficiency % Vin=6v Vin=10v Vin=15v Vin=20v Vin=30v Vin=40v 75 70 65 60 55 50 0 0.2 0.4 0.6 0.8 Iout A 1 1.2 1.4 1.6 SI-8008TMX Efficiency SI-8008TM Io－効率 Vout=5v設定 R1=4.2kΩ,R2=0.8kΩ 85 80 効率 % Efficiency % Vin=8v Vin=15v Vin=20v Vin=30v Vin=40v 75 70 65 60 55 50 0 0.2 0.4 0.6 0.8 Iout A 1 1.2 1.4 1.6 SI-8008TMX SI-8008TM Io－効率 Efficiency Vout=12v設定 Efficiency % 効率 % R1=11.2kΩ,R2=0.8kΩ 95 90 85 80 75 70 65 60 55 50 Vin=15v Vin=20v Vin=30v Vin=40v 0 0.2 0.4 0.6 0.8 1 1.2 1.4 Iout A Sanken Electric Co., Ltd. 4/13 1.6 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX Jan. 2010 In case of the setup of VO=5V (R2=0.8kΩ) (2) Output voltage rising *Load=C.R 6 5 VIN=8, 10, 20, 30, 40V Output voltage VO (V) Output voltage VO (V) 5 4 IO= 3 2 0A 0.1A 0.5A 1.0A 1.5A 1 0 2 4 6 Input voltage VIN (V) 8 5.04 5.02 VIN=40V 30V 20V 15V 5.00 4.98 4.96 10V 4.94 8V 4.92 3 2 1 0.5 10 (3) Load regulation 5.06 4 0 10 Shutdown supply current (mA) 0 4.90 1 1.5 2 2.5 Output current IO (A) 3 (6) Shutdown supply current 8 IO=0A 6 4 2 4.88 4.86 4.84 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0 Output current IO (A) (4) Thermal shutdown Output voltage VO (V) Output voltage VO (V) (5) Overcurrent protection characteristics 6 VIN=8V IO=0.01A TSD OFF 20 40 60 80 100 120 140 TSD ON 160 180 Junction temperature Ta (°C) Sanken Electric Co., Ltd. 5/13 10 20 30 Input voltage VIN (V) 40 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX Jan. 2010 4.3 Thermal derating SI-8000TM series Thermal derating curve 100 Tj(MAX)=125°C V PD VO I O 1 VF I O 1 O x VIN VO: Output voltage VIN: Input voltage IO: Output current ηx: Efficiency (%) VF: Di forward voltage SFPB66･･0.5V (IO=1.5A) Glass epoxy board 30×30mm Copper area: Copper area Copper area Allowable power dissipation Pd (W) Copper area Copper area Copper area Ambient Temperature Ta (°C) Note 1: As the efficiency is subject to the input voltage and output current, it shall be obtained from the efficiency curve in page 4 and substituted in percent. Note 2: Thermal design for Di shall be made separately. Sanken Electric Co., Ltd. 6/13 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX Jan. 2010 4.4 Reference data (1) Thermal data SI-3000KM/KMS 銅箔面積ー熱抵抗 SI-8000TMX Copper area―Thermal resistance 100 θ j-a （℃/W） 90 80 70 60 50 40 10 100 Copper area (mm22）) 銅箔面積 （㎜ 1000 (2) Allowable dissipation 許容損失Pd (W） Allowable power dissipation (W) Copper area―Allowable power dissipation =100°C 銅箔面積－許容損失Tjmax=100℃ 1.5 Ta=25℃ 1 40℃ 60℃ 0.5 85℃ 0 10 100 銅箔面積 （㎜2） Copper area (mm2) 1000 ・How to obtain junction temperature Temperature of lead portion of GND terminal: The junction temperature is obtained by measuring Tc with the thermocouple etc. and substituting it in the following equation. Tj PD j C TC (θj－C＝6°C/W) TC measurement point ● Sanken Electric Co., Ltd. 7/13 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX 5. Jan. 2010 Block diagram (Pin assignment) SI-8008TMX SI-8008TM Vin 1 SW IN C1 VO C2 Di Overcurrent 過電流保護 protection PReg L 2 Vc 5 ON/ OFF Latch ﾗｯﾁ && Driver ﾄﾞﾗｲﾊﾞ Reset ﾘｾｯﾄ R1 Oscillator 発振器 Comparator ｺﾝﾊﾟﾚｰﾀ Thermal 過熱保護 Shut down ADJ 4 Error amp ｴﾗｰｱﾝﾌﾟ R2 Reference 基準電圧 voltage GND 3 Di：SFPB66 (Sanken) The example of solder pattern design Recommended pattern 6.0 GND C1 8008TMX C2 6.1 Vc ＋ Vc ＋ IN R1 SW R2 Di 2.4 Vout 5.88 2.5 L * In order to achieve the best operating conditions, the GND line shall be a 1-point GND wiring with No. 3 terminal in the center Sanken Electric Co., Ltd. 8/13 1.27 0.47 0.8 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX 6. Jan. 2010 Typical application circuit 6.1 Standard circuit diagram 1 VIN IN SW SI-8008TMX SI-8008TM Vc C1 220uF GND 5 L 47uH 2 ADJ 4 VO R1 Di 3 R2 IADJ C2 470uF C1：220μF C2：470μF L1：47μH * see Fig1 Di：SFPB66 (Sanken) GN D GND Diode Di For the diode Di, the Schottky barrier diode must be used. If a fast recovery diode is used, the IC may be destroyed by applying reverse voltage due to the recovery and ON voltage. . 24 L1=125uH Choke coil L1 ・The efficiency may decrease and not reach the rated value if the winding resistance of choke coil is large. ・Since the overcurrent protection start current is around 2.5A, care should be taken for the self heating of choke coil due to magnetic saturation in overload and load short. ・Please refer to Fig.1 and select the inductance value when VOUT is set to 10V or higher. 20 L1=68uH 15 L1=100uH Vout V 10 L1=47uH 5 *Fig1choke coil L1 0 0.2 0.4 0.6 0.8 1.0 Iout A 1.2 1.4 1.5 Capacitor C1 and C2 ・Since the high ripple current flows in C1 and C2, the capacitors with high frequency and low impedance for switching power supply should be used. When the impedance of C2 is high, the abnormal switching waveform can be caused in low temperature conditions. Please avoid to use capacitors with extremely low direct equivalent resistance (ESR) such as OS capacitors and tantalum capacitors because the abnormal oscillation can be caused. Resistors R1, R2 ・R1 and R2 are a resistor for setting the output voltage. The output voltage should be set in a way that IADJ may be 1mA or so. The equation to obtain R1 and R2 values is as follows: ・When setting VO=0.8V, R2 should be connected for stable operation. ・Recommended output voltage settings: Vo≧VIN×8% R1 VOUT VADJ VOUT 0.8 ，R2 VADJ I ADJ 110 3 I ADJ 0.8 ≒ 0.8k 110 3 ◎In order to achieve the best operating conditions, it is necessary to assign each component with the shortest lines. Sanken Electric Co., Ltd. 9/13 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX Jan. 2010 7. Package information 7.1 Package type and physical dimensions Unit: mm *1 ８００８ＴＭＸ *2 ＳＫ *3 *4 １ ２ ３ ４ *1 Type number *2 Logo mark *3 Lot number 1st letter: The last digit of year 2nd letter: Month (1 to 9 for Jan. to Sept.,O for Oct. N for Nov. D for Dec.) 3rd letter: day 1 to 9 day: for “1” to “9” 10 to 31 day: for “A” to “Z” (But, “B”,”I”,”O”,”Q” is removed. *4 Administer number (Seven digits) ５ １ Pin assignment 1． IN 2． SW 3． GND 4． ADJ 5． VC Products Weight: Approx.0.33g 7.2 Appearance The body shall be clean and shall not bear any stain, rust or flaw. 7.3 Marking The part number and lot number shall be clearly marked by laser on the body and shall not be erased easily. Sanken Electric Co., Ltd. 10/13 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX 8 Jan. 2010 Package specification Unit: mm B B:2±0.5 Tape pullout direction D C C:13.0±0.5 D: 21±0.8 W1：17±0.5 W2：21.5±1 Package amount: 3000pcs/reel Antistatic nylon bag ２ Sanken Electric Co., Ltd. 11/13 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX Jan. 2010 9. Operating precautions 9.1 Parallel operation The parallel operation to increase the current is not available. 9.2 Thermal shut down SI-8000TMX series has a thermal protection circuit. This circuit protects the IC from self heatig by the over load. This circuit cannot guarantee the long-term reliability against the continuously over load status. 9.3 Precaution for handling Some terminals can be damaged by static electricity. 9.4 Others The contents in this document are subject to changes, for improvement and other purposes, without notice. Make sure that this is the latest revision of the document before use. Application and operation examples described in this document are quoted for the sole purpose of reference for the use of the products herein and Sanken can assume no responsibility for any infringement of industrial property rights, intellectual property rights or any other rights of Sanken or any third party which may result from its use. When using the products herein, the applicability and suitability of such products for the intended purpose or object shall be reviewed at the users’ responsibility. Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semiconductor products at a certain rate is inevitable. Users of Sanken products are requested to take, at their own risk, preventative measures including safety design of the equipment or systems against any possible injury, death, fires or damages to the society due to device failure or malfunction. Sanken products listed in this document are designed and intended for the use as components in general purpose electronic equipment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). Before placing an order, the user’s written consent to the specifications is requested. When considering the use of Sanken products in the applications where higher reliability is required (transportation equipment and its control systems, traffic signal control systems or equipment, fire/crime alarm systems, various safety devices, etc.), please contact your nearest Sanken sales representative to discuss and obtain written confirmation of your specifications, prior to the use of the products herein. 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Also, as purchaser of these products/ technology, you agree to follow the procedures for the export or transfer of these products/ technology, under the Foreign Exchange and Foreign Trade Law, when you export or transfer the products/technology abroad. Sanken Electric Co., Ltd. 12/13 1.5A Surface Mount Type・Output Variable・Buck Switching Regulator IC SI-8008TMX Jan. 2010 Appendix: Recommended soldering conditions Soldering junction temperature (°C) ＜Storage condition＞ Temperature: 5 – 35°C Humidity: 40 – 70% Atmosphere: No poisonous gas generation and little dust. No condensation. ＜Storage period＞ Storage period: 1 year or so in a hermetically sealed condition (If the long-term storage is expected, please consider vacuum packing or putting silica gel in the airtight container.) 6 months in an unsealed condition ＜Reflow condition＞ * Reflow is limited to twice. 250°C peek 25 0 230°C 20 0 180°C 150 30±10s 150°C 90±30s ＜Flow condition＞ * Flow is limited to once. Dip time ディップ時間 ピーク温度 Peak temperature Soldering junction temperature (°C) Within 5 sec ﾄｰﾀﾙ５秒以内 は ん だ 部 温 度 250～255℃ in total 250℃ 200℃ 150℃ Within 10秒以内 10 sec 100℃ Preheat (40 – 60 sec) プリヒート(40～60秒) Jet噴流 flow Cooling 冷却 Time 時間 ＜Hand soldering condition＞ Temperature of tip of soldering iron: 380±10°C Time: 3s +1s/－0s Number of times: Once Sanken Electric Co., Ltd. 13/13