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AT1117
Preliminary Product Information
1A Low Dropout Fast Response Positive Adjustable Regulator
Features
* Guaranted Output Voltage Accuracy within 2% * Fast Transient Response * Guaranteed Dropout Voltage at Multiple Currrents * Load Regulation : 0.1% Typ. * Line Regulation : 0.03% Typ. * Low Dropout Voltage : 1.1V Typ. at I =1A * Trimmed Current Limit : 1A Typ. at Tj=125 * On-Chip Thermal Limiting : 150 Typ. * Adjustable Output : 1.25~7.75V * Standard 3-pin TO-252 , SOT-223 Power Packages
General Description
The AT1117 is a low dropout three-terminal adjustable regulators with 1A output current capability. In order to obtain lower dropout voltage and faster transient response, which is critical for low voltage applications, the AT1117 has been optimized. The device is available in an adjustable version and fixed output voltages of 1.8V, 2.5V, 2.85V, 3.3V and 5V, the output available voltage range is from 1.25~7.75V with an input supply below 9V. Dropout voltage is guaranteed at a maximum of 1.2V at 1A.Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures. The AT1117 is available in the industry standard 3-pin TO-252 the low profile surface mount SOT-223 power packages which can be used in applications where space is limited.
Applications
* Active SCSI Terminators * Low Voltage Logic Supplies * Battery-Powered Circuitry * Post Regulator for Switching Power Supply
Block Diagram
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
AT1117
Preliminary Product Information
1A Low Dropout Fast Response Positive Adjustable Regulator
Pin Configuration
Front View for SOT-223 Front View for TO-252
AT1117 Ordering Information
Part number AT1117AT1117V Y Package SOT-223 TO-252 Marking AT1117V xxxxxx AT1117Y xxxxxx
:Output Voltage 18:1.8V 25:2.5V 28:2.85V 33:3.3V 50:5.0V xxxxxx:Date Code : Output Voltage
Pin Description
Pin No. Symbol I/O Description
1 2 3
ADJ/GND OUT IN
-O I
Adjust Pin / Ground pin Regulated voltage output pin Supply voltage input pin
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
AT1117
Preliminary Product Information
1A Low Dropout Fast Response Positive Adjustable Regulator
Absolute Maximum Ratings
(TJ=+250C)
Parameter Input voltage Operating junction temperature range Control section Power transistor Storage temperature Lead Temperature soldering, 10 second
Symbol VIN TJ
Limits 13.2 0 to 125 0 to 150 -65 to +150 260
Unit V
TSTG TL
Electrical Characteristics
(TJ=+250C)
Parameter Reference Voltage
Part number AT1117 AT1117-18 AT1117-25
Symbol VREF
Condition 10mAIOUT1A, 1.5V (VIN-VOUT) 10.75V 0A IOUT1A, 3.3VVIN12V 0A IOUT1A, 4.0VVIN12V 0A IOUT1A, 4.35VVIN12V 0A IOUT1A, 4.75VVIN12V 0AIOUT1A, 6.5VVIN12V IOUT=10mA, 1.5V (VIN-VOUT) 10.75V (Note1) IOUT=0A, 3.3VVIN12V (Note 1) IOUT=0A, 4.0VVIN12V (Note 1) IOUT=0A, 4.35VVIN12V (Note 1) IOUT=0A, 4.75VVIN12V (Note 1) IOUT=0A, 6.5VVIN12V (Note 1) (VIN-VOUT)=3V, 10mA IOUT1A (Note 1) VIN=3.3V, 0A IOUT1A (Note 1)
Values Unit Min. Typ. Max. 1.225 1.250 1.275 1.764 1.800 1.836 2.450 2.500 2.550 2.790 2.850 2.910 3.235 3.300 3.365 5.100 5.000 4.900 0.03 1 1 1 1 1 0.1 1 0.2 6 6 6 6 10 0.4 10 V V V V V V % mV mV mV mV mV % mV
Output Voltage
AT1117-28 AT1117-33 AT1117-50 AT1117 AT1117-18
VOUT
Line Regulation
AT1117-25 AT1117-28 AT1117-33 AT1117-50
REGLINE
Load Regulation
AT1117 AT1117-18
REGLOAD
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
AT1117
Preliminary Product Information
1A Low Dropout Fast Response Positive Adjustable Regulator
AT1117-25 AT1117-28 AT1117-33 AT1117-50 Dropout Voltage Current Limit Adjust Pin Current Adjust Pin Current Minimun Load Current Ripple Rejection Thermal Rejection Temperature Stability Long Term Stability RMS Output Noise Thermal Resistance AT1117-18 AT1117-25 AT1117-28 AT1117-33 AT1117-50 VD ILIMIT IADJ IADJ Io PSRR TR TS LS VN JC IIN VIN=4.0V, 0A IOUT1A 1 (Note 1) VIN=4.35V, 0A IOUT1A 1 (Note 1) VIN=4.75V, 0A IOUT1A 1 (Note 1) VIN=6.5V, 0A IOUT1A 1 (Note 1) IOUT=100mA (Note 2) 1 IOUT=500mA (Note 2) 1.05 IOUT=1A (Note 2) 1.1 (VIN-VOUT)=5V 1000 (VIN-VOUT)=3V, IOUT=10mA 60 0AIOUT1A, 0.2 1.5V (VIN-VOUT) 12V (VIN-VOUT)=12V (Note 1) 1.7 FRIPPLE=120HZ, VRIPPLE=1VP-P, 60 75 (VIN-VOUT)=3V TJ=25, 30ms Pulse 0.01 0.5 TJ=125, 1000Hrs 0.3 TJ=25, 10HzF10KHz, (% of VOUT) (Junction-to-Case, at Tab) VIN12V VIN12V VIN12V VIN12V VIN12V 0.003 15 5 5 5 5 5 10 10 10 10 10 10 10 10 15 1.1 1.2 1.3 120 5 mV mV mV mV V V V mA A A mA dB 0.1 %/W % % % /W mA mA mA mA mA
Quiescent Current
Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load line regulations are measured at a constant junction temperature by low duty cycle pulse testing. Note 2: Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/output differential measured at the specified output current. Test points and limits are also shown on the Dropout Voltage curve. Note 3: Minimum load current is defined as the minimum output current required to maintain regulation.
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
AT1117
Preliminary Product Information
1A Low Dropout Fast Response Positive Adjustable Regulator
Typical Application Circuit
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
AT1117
Preliminary Product Information
1A Low Dropout Fast Response Positive Adjustable Regulator
Timing Curve
Load Transient Responce
Dropout Voltage vs Output Current
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
AT1117
Preliminary Product Information
1A Low Dropout Fast Response Positive Adjustable Regulator
Output Voltage vs Input Voltage
Input Current vs Input Voltage
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
AT1117
Preliminary Product Information
1A Low Dropout Fast Response Positive Adjustable Regulator
Input Current vs Temperature
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
AT1117
Preliminary Product Information
1A Low Dropout Fast Response Positive Adjustable Regulator
Small Outline
3-pin Plastic SOT-223
SYMBOL A A1 B B1 c D E e e1 H L K
INCHES MIN 0.06 0.02 0.11 0.01 0.25 0.13 0.09BSC 0.18BSC 0.26 0.04 0.06 0 13 0.29 0.04 0.08 10 MAX 0.07 0.03 0.12 0.01 0.26 0.15
MILLIMETERS MIN MAX 1.50 1.80 0.02 0.08 0.60 0.80 2.90 3.10 0.28 0.32 6.30 6.70 3.30 3.70 2.3BSC 4.6BSC 6.70 7.30 0.91 1.10 1.50 2.00 0 10 13
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
AT1117
Preliminary Product Information
1A Low Dropout Fast Response Positive Adjustable Regulator
Small Outline
3-pin Plastic TO-252
SYMBOL A A1 b b2 C C1 D E e1 H L L1 L2
INCHES MIN 0.086 0.035 0.020 0.205 0.018 0.018 0.210 0.250 0.156 0.370 0.020 0.025 0.035 MAX 0.094 0.050 0.035 0.215 0.023 0.023 0.245 0.265 0.204 0.410 0.040 0.080
MILLIMETERS MIN MAX 2.18 2.39 0.89 1.27 0.508 0.89 5.207 5.461 0.46 0.58 0.46 0.58 5.334 6.22 6.35 6.73 3.96 5.18 9.398 10.41 0.51 0.64 1.02 0.89 2.032
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

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