SI-8000TM

DC/DC Step-Down Converter IC SI-8000TM Series ■General Descriptions SI-8000TM series has 300kHz oscillation frequency, so it contributes miniaturization of a chalk coil. Therefore, it realizes a compact and high efficient power supply together with TO 252-5 package (compatible:SC-63) . SI-8000TM series has the function required for switching regulators and protection circuits such as over-current, and overheating. With only four discrete components, it realizes a high efficient switching regulator without adjustment. 1.5A output current by compact power surface mount package. September 2005 ■Package---TO252-5 ■Applications ●DVD Recorder、FPD TV ●OA equipment, such as a printer ●On-board local power supply ■Key Specifications SI-8008T M (ADJ Type) Input Voltage Output Current Output Voltage Efficiency (TYP) ■Features ●1.5A output current by compact power surface mount package. ● High Efficiency 81% (at VIN=15V, Io=0.5A,Vo=5V) ● Requires only four discrete components. (C3: required for soft start.) ●Built-in Oscillation circuit (oscillation frequency : 300kHz (TYP)) ●Constant current type overcurrent protection and overheating protection. ●Soft start function. (ON/OFF function available. Output OFF at Low level.) ● Low consumption current at Output OFF. SI-8033T M 43V SI-8050T M SI-8120T M 0 to 1.5A 0.8V (REF Voltage) 3.3V 76% 5.0V 81% 12.0V 87% 81% (5V Set-up) Typical Connection C1：220μF C2：470μF C3：1μF (At the time of soft start functional use) L1：47μH Di：SFPB66(Sanken) . Sanken Electric Co.,Ltd. http://www.sanken-ele.co.jp/en/ 1/15 I02-001EA-050910 DC/DC Step-Down Converter IC SI-8000TM Series 1. Scope The present specifications shall apply to a DC-DC buck converter SI-8008TM. September 2005 2. Outline Classification Semiconductor IC (monolithic IC) Structure Plastic package (transfer mold) Applications ・DC voltage regulator ・Power supplies for telecommunication equipment , office equipment etc ,ON-board local regulator ・Output voltage regulator at secondary stage of switch mode power supply 3. Absolute maximum ratings 3-1 Absolute maximum ratings Characteristic DC input voltage Power dissipation １ Symbol VIN Pd1 Ratings 43 １.06 Units V W Remarks Power dissipation２ Pd2 1.65 W Glass‐epoxy board mounting in 900square ㎜, copper area 4.3% Tjmax=125℃ Glass‐epoxy board mounting in 900square ㎜, copper area 50% Tjmax=125℃ Junction temperature Tj -40~150 ℃ Thermal protection circuit is built-in in this product and when junction temperature rises to 130℃ or higher, it may be caused to operate Recommended max. junction temperature at operation is 125℃. Storage temperature Thermal resistance (junction-case) Thermal resistance (junction-ambient air) Tstg θj-c θj-a -40～150 ６ 95 ℃ ℃/W ℃/W Glass‐epoxy board mounting in 900square ㎜, copper area 4.3% . Sanken Electric Co.,Ltd. I02-001EA-050910 2/15 DC/DC Step-Down Converter IC SI-8000TM Series 3-2 Recommended operating conditions Characteristic DC input voltage range DC output voltage range DC output current range Operating junction temperature range Operating temperature range Symbol VIN Vo Io Tjop Top *1 Ratings MIN Vo+3 0.8～24 0～1.5 -40～125 -40～125 MAX 40 Units V V A ℃ ℃ September 2005 Remarks Io=0～1.5A *2 VIN≧Vo+3V *2 *1 The minimum value of DC input voltage range is 8V when output is less than 5V, VO+3,when the output is more than 5V.In the case of VIN=Vo+2～Vo+3V , it is set to Io=1A MAX. *2 To be used within the allowable package power dissipation characteristics (refer to P6). 4. Electrical characteristics 4-1 Electrical characteristics (Ta=25℃、Vo=5V adjusted R1=4.2kΩ,R2=0.8kΩ) Characteristic Reference voltage Reference voltage temperature coefficient Efficiency *3 Operating frequency Line regulation Load regulation Over current protection starting current ON/OFF terminal *4 Low level voltage Flow-out current level voltage at low Symbol Limits MIN 0.784 TYP 0.800 ±0.1 81 300 60 10 MAX 0.816 Units Test conditions VIN=15V，IO=0.1A VIN=15V IO=0.1A,Tc=0~100℃ 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 ， VADJ ⊿VREF/⊿T V mV/℃ % kHz η fo VLine VLoad IS VSSL ISSL Iq Iq(off) 1.6 80 40 mV mV A 0.5 10 6 200 400 40 V μA mA μA VSSL=0V VIN=15V，IO=0A VIN=15V VSS=0V Quiescent current 1 Quiescent current 2 Sanken Electric Co.,Ltd. I02-001EA-050910 3/15 DC/DC Step-Down Converter IC SI-8000TM Series *3 Efficiency is calculated by the following equation. VO･IO η(%)= VIN･IIN ×100 September 2005 *4 No.5 terminal is a SS terminal to enable soft start by connecting a capacitor. The output can be turned on and off by using a SS terminal. The output is stopped by decreasing the SS terminal voltage below VSSL and in order to perform ON/OFF operation of Vout, it is required to connect NPN transistor or the output of open collector type TTL between No.5 terminal and GND. In case that both soft and Vout ON/OFF are used, a protection measure such as limitation of current is required, as the discharge current of C3 flows across a transistor for ON/OFF operation, if the capacitance of C3 large. As a pull-up type resistor is provided inside the IC, no external voltage can be applied. In case of no use of ON/OFF, please keep it open. SI-8000TM SI-8000TFE SI-8000TM SI-8000TFE SI-8000TM SI-8000TFE 5 SS 5 SS C3 5 SS C3 VO.ON/OFF 4-2 Soft start Soft start +VO.ON/OFF Typical characteristics (Ta=25℃) （１）Efficiency Efficiency SI-8008TM Efficiency Curve Efficiency SI-8008TM／TFE　効率特性 Efficincy Curve Vo=5V Adjusted：R1=4.2kOhm, R2=0.8kOhm =0 8kΩ Ta=25℃　Vo=5v設定時 ：R1=4 2kΩ R2 Vo=5V adjusted 85 80 Efficiency η (%) 効率　% 75 70 65 60 55 0 0.5 Iout　A 1 1.5 VIN= 8v,10v,15v,20v,30v, 40v Sanken Electric Co.,Ltd. I02-001EA-050910 4/15 DC/DC Step-Down Converter IC SI-8000TM Series □ Output Voltage: 5V Adjusted (R2=0.8k[Ohm]) 6 Output Voltage VO [V] (2) Low Voltage Behavior (5) Quiescent Current September 2005 10 Quiescent Current[mA] 5 ４ 3 2 1 0 2 4 6 IO=0A、 0.1A 0.5A 1.0A 1.5A 8 6 4 2 Io=0A Output Voltage VO [V] 5.00 4.98 4.96 4.94 4.92 4.90 4.88 4.86 4.84 0 0.2 0.4 VIN=40V 30V 20V 15v 10V 8V Output Voltage VO [V] 5.06 5.04 5.02 入力電圧 VIN [V] (3) Load Regulation 8 10 0 10 20 30 入力電圧 VIN [V] (6) Thermal Protection 6 5 4 3 2 1 TSD OFF 40 VIN=8V Io=0.01A Output Current 0.6 0.8 1.0 1.2 1.4 IO [A] 1.6 TSD ON 0 400 (4) Circuit Current at Output OFF Circuit Current at Output OFF[uA] Junction Temperature Tj [℃] 20 40 60 80 100 120 140 160 180 300 Vss=0V 200 100 0 10 20 30 40 Input Voltage VIN [V] Sanken Electric Co.,Ltd. I02-001EA-050910 5/15 DC/DC Step-Down Converter IC SI-8000TM Series 4-2 Power Dissipation September 2005 SI-8000TM Series Power Dissipation Tjmax=125℃ ⎛ 100 ⎞ ⎛ VO PD = VO ⋅ I O ⎜ ⎜ η − 1⎟ − V F ⋅ I O ⎜1 − V ⎟ ⎜ IN ⎝x ⎠ ⎝ ⎞ ⎟ ⎟ ⎠ Glass‐epoxy board mounting in 30×30 ㎜ copper area copper area VO: Output voltage VIN: Input voltage IO: Output current ηx: Efficiency（％） VF: Diode forward voltage SFPB66･･0.5V (IO=1.5A) copper area copper area Power Dissipation Pd [W] copper area copper area Ambient Temperature Ta [℃] Note1：As the efficiency varies subject to the input voltage and output current, it shall be obtained from the efficiency curve in page 4 and substituted in percent. Note2：Thermal design for Di shall be made separately. Sanken Electric Co.,Ltd. I02-001EA-050910 6/15 DC/DC Step-Down Converter IC SI-8000TM Series Reference data Area of PC board：30×30mm September 2005 SI-8000TM Copper area on PC board vs. thermal resistance. SI-3000KM/KMS　銅箔面積ー熱抵抗 100 90 θj-a　（℃/W） 80 70 60 50 40 10 100 Copper area on PC board （） 2） 銅箔面積　（㎜ ｍｍ 2 1000 Copper area on PC board vs. Power dissipation Power Dissipation Pd [W] 銅箔面積－許容損失Tjmax=100℃ Tj=100℃ Area of PC board：30×30mm 1.5 1 0.5 85℃ Ta=25℃ 40℃ 60℃ 許容損失Pd　(W） 0 10 100 銅箔面積　（㎜2） Copper area on PC board （ｍｍ2） 1000 ・Calculation of junction temperature The junction temperature can be obtained from the following equation using the Tc that is measured by thermocouple. Tj = PD × θj − C + TC (θj-ｃ＝6℃／W) ● Tc measurement point 5. Block diagram (Connection diagram) Sanken Electric Co.,Ltd. I02-001EA-050910 7/15 DC/DC Step-Down Converter IC SI-8000TM Series SI-8008TM Vin C1 September 2005 1 IN PReg Over Current Protection Reset Oscillator Comparator Thermal Protection SW 2 Di L C2 VO 5 C3 SS ON/ OFF Soft･ Start Latch & Driver R1 ADJ 4 R2 Error Amp Reference Voltage GND 3 Di：SFPB66(made by sanken) Recommended pattern The example of the solder pattern. 6.0 GND C1 8000TM C2 C3 6.1 ＋ IN SW Di R1 R2 ＋ Vout 2.4 5.88 2.5 L 1.27 0.47 0.8 *The circuit board layout is recommended as follows: ①Other components are connected as close as possible to the SI-8008TM. ②Each ground of all components is connected at one point area. 6. Example application circuit Sanken Electric Co.,Ltd. I02-001EA-050910 8/15 DC/DC Step-Down Converter IC SI-8000TM Series 6-1 Standard circuit diagram 1 VIN IN SW 2 L 47uH VO R1 Di R2 IADJ C2 470uF GN D September 2005 C1：220μF C2：470μF C3：1μF (If soft start function is used) SI-8008TM C1 220uF SS 5 C3 GND GND 3 ADJ 4 L1：47μH Di：SFPB66 (Made by Sanken) Diode Ｄｉ ・The shottky-barrier diode must be used for Di. If other diodes like fast recovery diodes are used, IC may be destroyed because of the reverse voltage applied by the recovery voltage or ON voltage. Choke coil Ｌ1 ・If the winding resistance of the choke coil is too high, the efficiency may go down to the extent that it is out of the rating. ・As the overcurrent protection start current is approx. 2.5A, attention must be paid to the heating of the choke coil by the magnetic saturation due to overload or short-circulated load. Capacitor Ｃ1，Ｃ2，Ｃ3 ・As large ripple currents flow across C1 and C2, capacitors with high frequency and low impedance for SMPS must be used. Especially when the impedance of C2 is high, the switching waveform may not be normal at low temperature. Please use neither OS capacitor nor tantalum capacitor which causes an abnormal oscillation for the C2. ・ is a capacitor for soft start. In case soft start function is not used, please keep No.5 terminal open. C3 A pull-up resistor is provided inside the IC. Resister R1，R2 ・R1，R2 is resistor to the Output Voltage. IADJ set to become 1mA. Moreover, R1，R2 is calculated by the following expression. (V − VADJ ) = (VOUT − 0.8) (Ω)，R2 = VADJ = 0.8 ≒ 0.8k (Ω) R1 = OUT I ADJ 1 × 10− 3 I ADJ 1 × 10−3 ◎In order to have optimum operating condition, each component must be laid out with the minimum distance. Sanken Electric Co.,Ltd. I02-001EA-050910 9/15 DC/DC Step-Down Converter IC SI-8000TM Series 7 Package information 7-1 Package type and dimensions September 2005 ８００８ＴＭ*1 *2 ＳＫ *4 *3 0.1 １ ２ ３４ ５ *1 Type No *2 Logo mark Pin assignment 1：IN 2：SW 3：GND 4：ADJ 5：SS *3 Lot Number Products Weight Approx.0.33g ： 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：week(Arabic Numerical) *4 Administer number (four digit) 7-2 Appearance The body shall be clean and shall not bear any stain, rust or flaw. 7-3 Marking The type number and lot number shall be clearly stamped by laser on the body so that they cannot be erased easily. Sanken Electric Co.,Ltd. I02-001EA-050910 10/15 DC/DC Step-Down Converter IC SI-8000TM Series 8. Packing specifications 4.0±0.1 φ1.5 0.3 2.0±0.1 1.7 7.50 10.5 0.3 September 2005 Unit：mm 16.0 0.25 8.0 φ1.7 7.1 2.65 D C C:13.0±0.5 Direction of Reel B B:MIN 1.60 W1 +2 -0 W2 MAX 22.4 ㎜ W1 +3 -0.5 16.4 ㎜ Quantity：3000pcs／reel 16.4 ㎜ Sanken Electric Co.,Ltd. I02-001EA-050910 11/15 DC/DC Step-Down Converter IC SI-8000TM Series 9. Cautions and warnings 9-1 Parallel operation The parallel operation to increase the current is not available. September 2005 9-2 Thermal protection The SI-8000TM series has a thermal protection circuit. This circuit keeps the IC from the fever by the over load. But this circuit cannot guarantee the long-term reliability against the continuously over load status. Sanken Electric Co.,Ltd. I02-001EA-050910 12/15 DC/DC Step-Down Converter IC SI-8000TM Series Asia Pacific China Sanken Electric Hong Kong Co., Ltd. Suite 1026 Ocean Centre, Canton Road, Tsimshatsui, Kowloon, Hong Kong Tel: 852-2735-5262 Fax: 852-2735-5494 Sanken Electric (Shanghai) Co., Ltd. Room3202, Maxdo Centre, Xingyi Road 8, Changning district, Shanghai, China Tel: 86-21-5208-1177 Fax: 86-21-5208-1757 September 2005 India Saket Devices Pvt. Ltd. Office No.25, 2nd Floor, Bandal - Dhankude Plaza, Near PMT Depot, Paud Road, Kothrud, Pune - 411 038, India Tel: 91-20-5621-2340 Fax: 91-20-2528-5459 Japan Sanken Electric Co., Ltd. Overseas Sales Headquaters Metropolitan Plaza Bldg. 1-11-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-0021, Japan Tel: 81-3-3986-6164 Fax: 81-3-3986-8637 Korea Sanken Electric Korea Co., Ltd. Mirae Asset Life Bldg. 6F, 168 Kongduk-dong, Mapo-ku, Seoul, 121-705, Korea Tel: 82-2-714-3700 Fax: 82-2-3272-2145 Singapore Sanken Electric Singapore Pte. Ltd. 150 Beach Road, #14-03 The Gateway West, Singapore 189720 Tel: 65-6291-4755 Fax: 65-6297-1744 Taiwan Taiwan Sanken Electric Co., Ltd. Room 1801, 18th Floor, 88 Jung Shiau East Road, Sec. 2, Taipei 100, Taiwan R.O.C. Tel: 886-2-2356-8161 Fax: 886-2-2356-8261 Sanken Electric Co.,Ltd. I02-001EA-050910 13/15 DC/DC Step-Down Converter IC SI-8000TM Series Europe France Allegro MicroSystems Europe Les Pleiades, Park Nord Annecy, 74370 Metz-Tessy, France Tel: 33-450512359 Fax: 33-450512083 September 2005 United Kingdom Allegro MicroSystems Europe Limited Balfour House, Churchfield Road, Walton-on-Thames, Surrey KT12 2TD, U.K. Tel: 44-1932-253355 Fax: 44-1932-246622 North America United States Allegro MicroSystems, Inc. 115 Northeast Cutoff, Worcester, Massachusetts 01606, U.S.A. Tel: 1-508-853-5000 Fax: 1-508-853-3353 Allegro MicroSystems, Inc. (Southern California) 14 Hughes Street, Suite B105, Irvine, CA 92618 Tel: 1-949-460-2003 Fax: 1-949-460-7837 Sanken Electric Co.,Ltd. I02-001EA-050910 14/15 DC/DC Step-Down Converter IC SI-8000TM Series CAUTION / WARNING September 2005 ●The information in this publication has been carefully checked and is believed to be accurate; however, no responsibility is assumed for inaccuracies. ● Sanken reserves the right to make changes without further notice to any products herein in the interest of improvements in the performance, reliability, or manufacturability of its products. Before placing an order, Sanken advises its customers to obtain the latest version of the relevant information to verify that the information being relied upon is current. ● Application and operation examples described in this catalog 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 nd 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 catalog 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. The use of Sanken products without the written consent of Sanken in the applications where extremely high reliability is required (aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited. ● Anti radioactive ray design is not considered for the products listed herein. ● This publication shall not be reproduced in whole or in part without prior written approval from Sanken. ●This is notification that you, as purchaser of the products/technology, are not allowed to perform any of the following: 1. Resell or retransfer these products/technology to any party intending to disturb international peace and security. 2. Use these products/technology yourself for activities disturbing international peace and security. 3. Allow any other party to use these products/technology for activities disturbing international peace and security. 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. I02-001EA-050910 15/15