View AT1303_255018.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

AT1303
Preliminary Product Information MicroPower Step-Up DC/DC Converter Features
* Low Start-Up from below 1.0V * Low Input Quiescent Current(Switching Off Current for 3.3V output) : 60A (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
General Description
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: service@aimtron.com.tw 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: service@aimtron.com.tw 2 05/05/26
AT1303
Preliminary Product Information MicroPower Step-Up DC/DC Converter Absolute Maximum Ratings
(Ta=+250C)
Parameter Power supply voltage LX pin voltage LX pin output current Allowable dissipation Operating temperature Storage temperature
Symbol VCC VLX ILX PD TOP Tstg
Condition -- -- -- 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 Power Supply Voltage Input Voltage Start-Up Voltage
Symbol VCC VIN VStart I2
Condition
Min. 2.5 1.5
Values Typ. 1.0 60 100 1 1.220 380 90 0.23 1.4 0.8 1.0 70 7.5 170
Max. 5.5 5.5 1.1 70 110 5 1.244 95 0.26 1.7 1.2 1.02 90 -
Unit V V V A A A V KHz % A V V mV mA C
IOUT=1mA VIN =0 2V VIN = VOUT +0.5V(VOUT = 3.3V) VIN = VOUT +0.5V(VOUT = 5.0V) /SHDN=0V, VIN =5.5V Close loop, VOUT =3.3V VOUT =3.3V VOUT =3.3V VOUT =3.3V
50 90 1.200 85 0.2 1.0 0.4 0.98 50 -
Switch off Current I2 Shutdown Current Feedback Reference Switching Frequency Maximum Duty LX ON Resistance Current Limit /SHDN Trip Level LBI Trip Level Hysteresis Width (LBI Trip Level) LBO/LD Sink current Thermal shutdown ILimit I3 VREF FS Dmax
VIN = 2.0V , VOUT =3.3V, Duty=55% VOUT =3.3V VCC Falling VCC Rising
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: service@aimtron.com.tw 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=10H/LYS6S28(LEE YU) Efficiency for 3.3V Output
90
85
Efficiency
80 Vin Vin Vin Vin Vin Vin = 1.0V = 1.5V = 1.8V = 2.0V = 2.5V = 3.0V
75
70
65 1 10
10 ILoad(mA)
2
10
3
Efficiency for 5.0V Output
92 90 88 86 Efficiency 84 82 80 78 76 1 10
Vin Vin Vin Vin Vin Vin
= 1.0V = 1.5V = 1.8V = 2.0V = 3.0V = 4.0V
10 ILoad(mA)
2
10
3
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: service@aimtron.com.tw 4 05/05/26
AT1303
Preliminary Product Information MicroPower Step-Up DC/DC Converter
Efficiency for 3.3V Output (Vin=2.0V)
88
86
84 Efficiency
82
80
78
L = 3.3uH L = 4.7uH L = 10uH L = 22uH
76 1 10
10 ILoad(mA)
2
10
3
Efficiency for 5.0V Output (Vin=2.0V)
90 88 86 84 Efficiency 82 80 78 76 74 72 1 10
2 3
L = 3.3uH L = 4.7uH L = 10uH L = 22uH
10 ILoad(mA)
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: service@aimtron.com.tw 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: service@aimtron.com.tw 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: service@aimtron.com.tw 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: service@aimtron.com.tw 8 05/05/26
AT1303
Preliminary Product Information MicroPower Step-Up DC/DC Converter
Small Outline
8-pin TSSOP
SYMBOL A B C D E F H K M
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: service@aimtron.com.tw 9 05/05/26
AT1303
Preliminary Product Information MicroPower Step-Up DC/DC Converter
Small Outline
8-pin Plastic
SYMBOL A A1 B C D e E H L S
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: service@aimtron.com.tw 10 05/05/26

▲Up To Search▲

Price & Availability of AT1303

	To Download AT1303 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .