AT1303M-GRE

AT1303 AIMTRON | Alldatasheet

Document overview

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• PDF pages: 10

Technical content

Features

• 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

Applications

• Personal Digital Assistant (PDA)
• Digital Camera
• Portable Audio (MP3)
• Electronic Game General Description The AT1303 is a high e fficiency curre nt m ode PWM step -up DC/DC co nverter with ligh t lo ad control f or a pplications us ing battery-powered system. Th e d evice will au tomatically sk ip switching cycles u nder ligh t lo ad cond ition to maintain high ef ficiency at light loa d. T he sm all MSOP-8 or TSSOP-8 packages make the AT1303 an ideal c hoice of DC/ DC Conve rter for s pace conscious applications. Block Diagram Aimtron reserves the right without notice to change this circuitry and specifications.

Preliminary Product Information MicroPower Step-Up DC/DC Converter 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 Pin Configuration Pin Description Pin No. Symbol I/O Description

1 LBO O Low Battery Detected output (active Hi-Z)

2 LBI I Low Battery Detected input

3 VCC P Power Supply

4 LX O Switching Pin

5 PGND P Power Ground

6 GND P Ground

7 FB I Error Amplifier Input

8 /SHDN I Chip Enable Input

Ordering Information

P art number Package Marking AT1303P TSSOP8 AT1303P AT1303P_PBF TSSOP8, Pb-Free AT1303P, Date Code with one bottom line AT1303P_GRE TSSOP8, Green AT1303P, Date Code with two bottom line AT1303M MSOP8 AT1303 AT1303M_PBF MSOP8, Pb-Free AT1303, Date Code with one bottom line AT1303M_GRE MSOP8, Green AT1303, Date Code with two bottom line

Preliminary Product Information MicroPower Step-Up DC/DC Converter Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 3 0 5 / 0 5 / 2 6 Absolute Maximum Ratings (Ta=+250C) Rated Value Parameter Symbol Condition Min. Max. Unit Power supply voltage VCC — — 6.0 V LX pin voltage VLX — — 6.0 V LX pin output current ILX — — 1.7 A TSSOP8 — 430 mW Allowable dissipation PD MSOP8 — 330 mW Operating temperature TOP — -30 +85 0C Storage temperature Tstg — -55 +125 0C WARNING: Semiconductor devices can be permanentl y damaged by application of stress (vo ltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.

Electrical Characteristics

(Ta=+25 0C) Values Parameter Symbol Condition Min. Typ. Max. Unit Power Supply V oltage VCC 2.5 - 5.5 V Input V oltage VIN 1.5 - 5.5 V Start-Up V oltage VStart IOUT=1mA V IN =0Æ2V - 1.0 1.1 V I2 VIN = VOUT +0.5V(VOUT = 3.3V) 50 60 70 DŽA Switch off Current I2 VIN = VOUT +0.5V(VOUT = 5.0V) 90 100 110 DŽA Shutdown Current I3 /SHDN=0V , VIN =5.5V - 1 5 DŽA Feedback Reference VREF Close loop, VOUT =3.3V 1.200 1.220 1.244 V Switching Frequency FS VOUT =3.3V - 380 - KHz Maximum Duty Dmax VOUT =3.3V 85 90 95 % LX ON Resistance VOUT =3.3V 0.2 0.23 0.26 Ω /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 Hysteresis Width (LBI Trip Level) VCC Rising 50 70 90 mV LBO/LD Sink current ILBO LBO/LD=0.4V - 7.5 - mA Thermal shutdown - 170 - °C

Preliminary Product Information MicroPower Step-Up DC/DC Converter 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 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 365 ILoad(mA) Efficiency Vin = 1.0V Vin = 1.5V Vin = 1.8V Vin = 2.0V Vin = 2.5V Vin = 3.0V Efficiency for 5.0V Output 376 ILoad(mA) Efficiency Vin = 1.0V Vin = 1.5V Vin = 1.8V Vin = 2.0V Vin = 3.0V Vin = 4.0V

Preliminary Product Information MicroPower Step-Up DC/DC Converter 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 Efficiency for 3.3V Output (Vin=2.0V) 376 ILoad(mA) Efficiency L = 3.3uH L = 4.7uH L = 10uH L = 22uH Efficiency for 5.0V Output (Vin=2.0V) 372 ILoad(mA) Efficiency L = 3.3uH L = 4.7uH L = 10uH L = 22uH

Preliminary Product Information MicroPower Step-Up DC/DC Converter 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

Preliminary Product Information MicroPower Step-Up DC/DC Converter 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

Preliminary Product Information MicroPower Step-Up DC/DC Converter 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 Typical Application Circuit Fig. 1 Fig. 2

Preliminary Product Information MicroPower Step-Up DC/DC Converter 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 Small Outline 8-pin TSSOP INCHES MILLIMETERS SYMBOL MIN MAX MIN MAX NOTES A 0.114 0.122 2.90 3.10 - B 0.169 0.177 4.30 4.50 - C 0.244 0.260 6.20 6.60 - D 0.026 B SC 0.65 B SC - E 0.010 0.012 0.25 0.30 - F 0.002 0.006 0.05 0.15 - H 0.041 0.047 1.05 1.20 - K 0.005 B SC 0.127 B SC - M 0.020 0.028 0.50 0.70 ƹ 00 80 00 80 -

Preliminary Product Information MicroPower Step-Up DC/DC Converter Tel: 886-3-563-0878 WWW : http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 10 0 5/05/26 Small Outline 8-pin Plastic .401 INCHES MILLIMETERS SYMBOL MIN MAX MIN MAX NOTES A 0.037 0.043 0.94 1.10 - A1 0.002 0.006 0.05 0.15 - B 0.010 0.014 0.25 0.36 - C 0.005 0.007 0.13 0.18 - D 0.116 0.120 2.95 3.05 - e 0.0256 BSC 0.65 BSC - E 0.116 0.120 2.95 3.05 - H 0.188 0.198 4.78 5.03 L 0.016 0.026 0.41 0.66 - ƹ 0° 6° 0° 6° S 0.207 BSC 0.525 BSC -