AT1303 Preliminary Product Information MicroPower Step-Up DC/DC Converter Features General Description • Low Start-Up from below 1.0V • Low Input Quiescent Current(Switching Off Current for 3.3V output) : 60µA (typ.) • High Output Voltage Accuracy ±2.0% • Small Number of External Components needed • Output Voltage from 1.2V to 5.5V • Space Saving MSOP-8 or TSSOP8 package The AT1303 is a high efficiency current mode PWM step-up DC/DC converter with light load control for applications using battery-powered system. The device will automatically skip switching cycles under light load condition to maintain high efficiency at light load. The small MSOP-8 or TSSOP-8 packages make the AT1303 an ideal choice of DC/DC Converter for space conscious applications. Applications • Personal Digital Assistant (PDA) • Digital Camera • Portable Audio (MP3) • Electronic Game 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 05/05/26 AT1303 Preliminary Product Information MicroPower Step-Up DC/DC Converter Pin Configuration Pin Description Pin No. 1 2 3 4 5 6 7 8 Symbol LBO LBI VCC LX PGND GND FB /SHDN I/O O I P O P P I I Description Low Battery Detected output (active Hi-Z) Low Battery Detected input Power Supply Switching Pin Power Ground Ground Error Amplifier Input Chip Enable Input Ordering Information Part number AT1303P AT1303P_PBF AT1303P_GRE AT1303M AT1303M_PBF AT1303M_GRE Package TSSOP8 TSSOP8, Pb-Free TSSOP8, Green MSOP8 MSOP8, Pb-Free MSOP8, Green Marking AT1303P AT1303P, Date Code with one bottom line AT1303P, Date Code with two bottom line AT1303 AT1303, Date Code with one bottom line AT1303, Date Code with two bottom line 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 05/05/26 AT1303 Preliminary Product Information MicroPower Step-Up DC/DC Converter Absolute Maximum Ratings (Ta=+250C) Parameter Symbol Condition Power supply voltage LX pin voltage LX pin output current Allowable dissipation VCC VLX ILX PD Operating temperature Storage temperature TOP Tstg — — — TSSOP8 MSOP8 — — Rated Value Min. Max. — 6.0 — 6.0 — 1.7 — 430 — 330 -30 +85 -55 +125 Unit V V A mW mW 0 C 0 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 (Ta=+250C) Parameter Symbol Condition Min. Values Typ. Max. Unit Power Supply Voltage VCC 2.5 - 5.5 V Input Voltage VIN 1.5 - 5.5 V Start-Up Voltage VStart - 1.0 1.1 V IOUT=1mA VIN =0Æ2V I2 VIN = VOUT +0.5V(VOUT = 3.3V) 50 60 70 μA I2 VIN = VOUT +0.5V(VOUT = 5.0V) 90 100 110 μA I3 /SHDN=0V, VIN =5.5V - 1 5 μA VREF Close loop, VOUT =3.3V 1.200 1.220 1.244 V Switch off Current Shutdown Current Feedback Reference Switching Frequency FS VOUT =3.3V - 380 - KHz Dmax VOUT =3.3V 85 90 95 % VOUT =3.3V 0.2 0.23 0.26 Ω VIN = 2.0V , VOUT =3.3V, Duty=55% 1.0 1.4 1.7 A /SHDN Trip Level VOUT =3.3V 0.4 0.8 1.2 V LBI Trip Level VCC Falling 0.98 1.0 1.02 V VCC Rising 50 70 90 mV - 7.5 - mA - 170 - °C Maximum Duty LX ON Resistance Current Limit Hysteresis Width (LBI Trip Level) LBO/LD Sink current Thermal shutdown ILimit ILBO LBO/LD=0.4V 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 05/05/26 AT1303 Preliminary Product Information MicroPower Step-Up DC/DC Converter Thermal shutdown Hysterises - 20 - °C *Unless otherwise provided, VIN =1.5V (when VOUT =3.3V), and use External Circuit of Typical Application (Fig 1). Typical Curve (as Fig.1, Fig. 2) L=10µH/LYS6S28(LEE YU) Efficiency for 3.3V Output 90 Efficiency 85 80 75 70 65 1 10 Vin Vin Vin Vin Vin Vin = 1.0V = 1.5V = 1.8V = 2.0V = 2.5V = 3.0V 2 3 10 ILoad(mA) 10 Efficiency for 5.0V Output 92 90 88 Efficiency 86 84 Vin Vin Vin Vin Vin Vin 82 80 = 1.0V = 1.5V = 1.8V = 2.0V = 3.0V = 4.0V 78 76 1 10 2 10 ILoad(mA) 3 10 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 05/05/26 AT1303 Preliminary Product Information MicroPower Step-Up DC/DC Converter Efficiency for 3.3V Output (Vin=2.0V) 88 86 Efficiency 84 82 80 L = 3.3uH L = 4.7uH L = 10uH L = 22uH 78 76 1 10 2 3 10 ILoad(mA) 10 Efficiency for 5.0V Output (Vin=2.0V) 90 88 86 Efficiency 84 82 80 L = 3.3uH L = 4.7uH L = 10uH L = 22uH 78 76 74 72 1 10 2 10 ILoad(mA) 3 10 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 05/05/26 AT1303 Preliminary Product Information MicroPower 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 05/05/26 AT1303 Preliminary Product Information MicroPower 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 05/05/26 AT1303 Preliminary Product Information MicroPower Step-Up DC/DC Converter Typical Application Circuit Fig. 1 Fig. 2 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 05/05/26 AT1303 Preliminary Product Information MicroPower Step-Up DC/DC Converter Small Outline SYMBOL A B C D E F H K M α 8-pin TSSOP INCHES MIN MAX 0.114 0.122 0.169 0.177 0.244 0.260 0.026 BSC 0.010 0.012 0.002 0.006 0.041 0.047 0.005 BSC 0.020 0.028 80 00 MILLIMETERS MIN MAX 2.90 3.10 4.30 4.50 6.20 6.60 0.65 BSC 0.25 0.30 0.05 0.15 1.05 1.20 0.127 BSC 0.50 0.70 00 80 NOTES - 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 05/05/26 AT1303 Preliminary Product Information MicroPower Step-Up DC/DC Converter Small Outline SYMBOL A A1 B C D e E H L α S 8-pin Plastic MSOP INCHES MIN MAX 0.037 0.043 0.002 0.006 0.010 0.014 0.005 0.007 0.116 0.120 0.0256 BSC 0.116 0.120 0.188 0.198 0.016 0.026 0° 6° 0.207 BSC MILLIMETERS MIN MAX 0.94 1.10 0.05 0.15 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0° 6° 0.525 BSC NOTES - 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] 10 05/05/26