AT1301 Preliminary Product Information VFM Step-Up DC/DC Converter Features General Description • Guaranteed Start-Up from below 0.9V • Low Input Current • High Output Voltage Accuracy ±2.5% • Small Number of External Components needed • Fixed Output Voltage: 3.3V, 5V • Space Saving SOT-89 package The AT1301 is a high efficiency step-up DC/DC converter for applications using 1 to 4 cells battery. Only three external components are required to deliver a fixed output voltage of 3.3V, 5V. This device employ VFM for minimum supply current at low loads. Applications The VFM control circuit operating in 100kHz (typ.) switching rate results in smaller passive components. The small SOT-89 packages make the AT1301 an ideal choice of DC/DC Converter for space conscious applications. • Power source for battery-powered equipment • Power source for cameras, camcorders, VCRs, PDAs, electronic data banks, and hand-held Communication equipment Block Diagram Aimtron reserves the right without notice to change this circuitry and specifications. 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 1 AT1301 Preliminary Product Information VFM Step-Up DC/DC Converter Pin Configuration AT1301 (SOT-89 ) Pin Description Pin No. 1 2 3 Symbol VSS OUT LX I/O P P/O O Description Ground Pin Step-Up Output and Power Supply Pin Switching Pin Ordering Information Part number. AT1301-33 AT1301-50 Output voltage 3.3V 5V Remarks □□□A □□□B 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 2 AT1301 Preliminary Product Information VFM Step-Up DC/DC Converter Absolute Maximum Ratings (Ta=+250C) Parameter Symbol Condition Rated Value Unit Min. Max. Power supply voltage VOUT — — 10 V LX pin voltage VLX — — 10 V LX pin output current ILX — — 250 mA Allowable dissipation PD — — 500 mW 0 Operating temperature TOP — 0 +70 C 0 Storage temperature Tstg — -55 +125 C WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings. Electrical Characteristics Parameter Output Voltage Part number AT1301-33 AT1301-50 Input Voltage Start-Up Voltage Hold-On Voltage AT1301-33 No-Load Input Current AT1301-50 Supply Current LX Switching Current LX Leakage Current Maximum Oscillator Frequency Oscillator Duty Cycle Efficiency VLX Voltage Limit AT1301-33 AT1301-50 AT1301-33 AT1301-50 (Ta=+250C) Symbol Condition Min. 3.218 4.875 0.6 Values Typ. 3.300 5.000 0.7 - Max. 3.382 5.125 8 0.9 - VOUT VOUT VIN VStart VHold IOUT=1mA IOUT=1mA IIN1 IOUT=0mA - 30 - μA IIN2 VIN = VOUT +0.5V Measurement of the IC input current in switch off - 0.6 - μA ILX VLX =0.4V 60 - - mA ILXleak VLX =8V +0.5V - 0.6 0.8 mA 75 100 130 KHz 60 70 80 % 70 80 - % 0.6 0.8 1.0 V VIN =0Æ2V VIN =2Æ0V VIN = VOUT fOSC DUTY VLX ” L” side AT1301-33 AT1301-50 Unit η IOUT=50mA VLXlimit LX Switch On V V V V V Unless otherwise provided, VIN =2.0V (when VOUT =3.3V); VIN =3.0V (when VOUT =5.0V) , VSS =0V, IOUT=10mA, and use External Circuit of Typical Application (Fig 1). 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 3 AT1301 Preliminary Product Information VFM Step-Up DC/DC Converter Typical Application Schematic 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 4 AT1301 Preliminary Product Information VFM Step-Up DC/DC Converter Operating Characteristics Condition : L = 100μH, C = 22μF. 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 5 AT1301 Preliminary Product Information VFM Step-Up DC/DC Converter 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 6 AT1301 Preliminary Product Information VFM Step-Up DC/DC Converter 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 7 AT1301 Preliminary Product Information VFM Step-Up DC/DC Converter Package Information Symbol A b B b1 C C1 D D1 e H Dimension in millimeters Min Max 1.397 1.600 0.356 0.483 2.388 2.591 0.406 0.533 -4.242 0.787 1.194 4.394 4.597 1.397 1.753 1.448 1.549 0.381 0.432 Dimensions in inches Min Max 0.055 0.063 0.014 0.019 0.094 0.102 0.016 0.021 -0.167 0.031 0.047 0.173 0.181 0.055 0.069 0.057 0.061 0.015 0.017 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 8 AT1301 Preliminary Product Information VFM Step-Up DC/DC Converter Reflow Condition (IR/Convection or VPR Reflow) Reference JEDEC Standard J-STD-020A Classification Reflow Profiles Convection or IR/Convction Average Heating Rate(180°C to peak) Preheat Temperature(125±20°C) Temperature maintained above 180°C Time within 5°C of actual Peak Temperature Peak Temperature Range(Note 1) Cooling Rate Time 25°C to Peak Temperature 5°C/second max. 120 seconds max. 10~150 seconds 10~20 seconds 219~225°C or 235~240°C 6°C /second max. 6 minutes max. VPR 10°C/second max. 60 seconds 219~225°C or 235~240°C 10°C/second max. *1 The maximum peak temperatures for IR and VP reflow are depending on package dimensions. Package Reflow Conditions Pkg. Thickness ≥2.5mm and Pkg. Thickness <2.5mm and all bags Pkg. Volume ≥350 mm3 Pkg. Thickness <2.5mm and Pkg. Volume <350 mm3 Convection 219~225°C VPR 219~225°C IR/Convection 219~225°C Convection 235~240°C VPR 235~240°C IR/Convection 235~240°C 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 9