AMS1117 1A Adjustable/Fixed Low Dropout Linear Regulator General Description Key Features - Low dropout voltage - Load regulation: 0.2% typical - Optimized for Low Voltage - On-chip thermal limiting - Standard SOT-223 and TO-252 packages - Three-terminal adjustable or fixed low dropout 1.2V,1.5V,1.8V, 2.5V, 2.85V, 3.3V, 5V. Regulators The AMS1117-ADJ and AMS1117-1.2,-1.5,-1.8,-2.5,-2.85, -3.3 and-5 are low dropout three-terminal regulators with 1A output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. The 2.85V version is designed specifically to be used in Active Terminators for SCSI bus. On-chip thermal limiting provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures. Applications - Active SCSI terminators - High efficiency linear regulators - Post regulators for switching supplies - Battery chargers - 12V to 5V linear regulators -Motherboard clock supplies Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the AMS1117 flows into the load, increasing efficiency. The AMS1117 series regulators are available in the industry-standard SOT-223 and TO-252 power packages. Typical Application Figure 1. Typical Applications of AMS1117 Notice: The distance between Vout pin and Capacitor should not exceed 4cm for excellent performance 1 Advanced Monolithic Systems http://www.ams-semitech.com AMS1117 1A Adjustable/Fixed Low Dropout Linear Regulator Pin Assignments Figure 2. Pin Assignments of AMS1117 *With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, ΘJA can vary from 30°C/W to more than 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W. Absolute Maximum Ratings Parameter Min. Max. VIN 18 (VIN – VOUT) * IOUT See Figure 3 Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) V -20 125 °C -65 150 °C 300 °C 2 Advanced Monolithic Systems Unit http://www.ams-semitech.com AMS1117 1A Adjustable/Fixed Low Dropout Linear Regulator Block Diagram VIN Thermal Limit Current Limit VOUT Substrate GND (fixed output) ADJ. (adjustable output) Figure 3. Block Diagram of AMS1117 Electrical Characteristic Typicals and limits appearing in normal type apply for TJ=25℃.Limits appearing in Boldface type apply over the entire junction temperature for operation, -20℃to 125℃. Symbol VREF VOUT Min (Note 2) Typ (Note 1) Max (Note 2) Units 1.225 1.250 1.275 V IOUT = 10mA, VIN = 3.2V 1.176 1.200 1.224 AMS1117-1.2 ,2.7V<= VIN<=8.2V 1.152 1.200 1.248 AMS1117-1.5 ,3.0V<= VIN<=8.5V 1.470 1.500 1.530 V AMS1117-1.8 ,3.3V<= VIN<=8.8V 1.764 1.800 1.836 V AMS1117-2.5 ,4V<= VIN<= 9.5V 2.450 2.500 2.550 V AMS1117-2.85 , 4.35V <= VIN<= 9.85V 2.793 2.850 2.907 V AMS1117-3.3 , 4.8V<= VIN <=10.3V 3.234 3.300 3.366 V AMS1117-5.0,6.5V<=VIN <= 12V 4.900 5.000 5.100 V Parameter Conditions Reference AMS1117 Voltage 1.5V<=(VIN-VOUT)<=7V,10mA<=IOUT<=1A Output Voltage 10mA<= IOUT<=1A 3 Advanced Monolithic Systems http://www.ams-semitech.com V AMS1117 1A Adjustable/Fixed Low Dropout Linear Regulator Electrical Characteristic (Continued) Typicals and limits appearing in normal type apply for TJ=25℃.Limits appearing in Boldface type apply over the entire junction temperature for operation, -20℃ to 125℃. Symbol △VOUT Typ (Note 1) Max (Note 2) Units IOUT=10mA ,(VOUT+1.5V)<=VIN<=12V 0.035 0.2 % VIN-VOUT=2V,10mA<= IOUT<=1A, 0.2 0.7 % 0.2 1 % 1.100 1.250 V Parameter Conditions Line Regultion (Note 3) Load Regultion (Note 3) Min (Note 2) AMS1117-1.2 VIN-VOUT=2V,10mA<= IOUT<=1A, VIN-VOUT Dropout Volage IOUT=1A,△VREF=1% Current Limit VIN-VOUT= 2V, TJ=25℃ Minimum Load AMS1117-ADJ Current (Note 4) 1.5V<=(VIN-VOUT)<=10V Quiescent Curent VIN=VOUT+1.25V 5 13 mA TA = 25°C, 30ms pulse 0.01 0.1 %/W Thermal Regulation Ripple ILimit Rejection 1.1 f=120Hz,VIN-VOUT=3V, VRipple=1VPP 1.5 10 mA 60 Adjust Pin Current Adjust Pin Current Change 1.5V<=VIN-VOUT<=7V, 10mA<=IOUT<=1A Temperature Stability Long Term Stability TA = 125°C, 1000hrs. 4 Advanced Monolithic Systems A http://www.ams-semitech.com 72 dB 50 120 µA 0.2 5 µA 0.5 % 0.3 % AMS1117 1A Adjustable/Fixed Low Dropout Linear Regulator (Continued) Electrical Characteristic Typicals and limits appearing in normal type apply for TJ=25℃.Limits appearing in Boldface type apply over the entire junction temperature for operation, -20℃to 125℃. ILimit Min (Note 2) Typ (Note 1) RMS Output Noise(% of VOUT) TA = 25°C, 10Hz<= f <=10kHz 0.003 % Thermal Resistance, Junction to Case SOT-223 15 ℃/W TO-252 3 ℃/W Thermal Shutdown Junction Temperature 155 ℃ 25 ℃ Note 1: Typical Values represent the most likely parametric norm. Note 2: All limits are guaranteed by testing or statistical analysis. Note 3: Load and line regulation are measured at constant junction room temperature. Note 4: The minimum output current required to maintain regulation. Typical Performance Characteristics 1.5 1.4 1.3 Dropout Voltage ( V ) Units Conditions Thermal Shutdown Hysteresis 1.2 1.0 0.9 0.8 0.7 0.6 0.5 0 0 Max (Note 2) Parameter Symbol 0.2 0.4 0.6 0.8 1.0 Output Current ( A ) Figure 4. Dropout Voltage VS. Output Current 5 Advanced Monolithic Systems http://www.ams-semitech.com AMS1117 1A Adjustable/Fixed Low Dropout Linear Regulator Typical Performance Characteristics (Continued) 3.70 1.255 3.65 1.250 3.60 Output Voltage( V ) ReferenceVoltage( V ) 0.260 1.245 1.240 1.235 1.225 1.220 3.55 3.50 3.45 3.40 3.35 3.30 1.215 3.25 1.210 3.20 -75 –50 –25 0 25 50 75 100 125 150 175 -75 –50 –25 0 25 50 75 100 125 150 175 Junction Temperature ( ℃ ) Junction Temperature ( ℃ ) Figure 5. Reference Voltage VS. Temperature Figure 6. Output Voltage VS. Temperature 100 Note: AMS1117 Only 90 4 ADJ Pin Current( µA ) Minimum Load Current( mA ) 5 3 2 1 80 70 60 50 40 30 20 10 0 -75 –50 –25 0 25 50 75 100 125 150 175 Junction Temperature ( ℃ ) 0 -75 –50 –25 0 25 50 75 100 125 150 175 Junction Temperature ( ℃ ) Figure 8. ADJ Pin Current VS. Temperature Figure 7. Minimum Load Current VS. Temperature 6 Advanced Monolithic Systems http://www.ams-semitech.com AMS1117 1A Adjustable/Fixed Low Dropout Linear Regulator Mechanical Dimensions 4-Lead SOT-223 Package Symbol Inches Millimeters Min. Max. Min. Max. A Ñ .071 Ñ 1.80 A1 Ñ .181 Ñ 4.80 B .025 .033 .064 .840 c Ñ 0.90 Ñ 2.29 D .248 .264 6.30 6.71 E .130 .148 3.30 3.71 e .115 .124 2.95 3.15 F .033 .041 .840 1.04 H .264 .287 6.71 7.29 I .0121 Ñ .310 Ñ J Ñ 10° Ñ 10° K 10° 16° 10° 16° L .0008 .0040 .0203 .1018 M 10° 16° 10° 16° N .010 .014 .250 .360 Notes Figure 9. 4-Lead SOT-223 Package 7 Advanced Monolithic Systems http://www.ams-semitech.com AMS1117 1A Adjustable/Fixed Low Dropout Linear Regulator (Continued) Mechanical Dimensions 3-Lead TO-252 Package Symbol Inches Min. Max. Millimeters Min. Max. A .086 .094 2.19 2.39 b .025 .035 0.64 0.89 b2 .030 .045 0.76 1.14 5.46 Notes: 4. Thermal pad contour optional within dimension b3 b3 .205 .215 5.12 c .018 .024 0.46 0.61 c2 .018 .023 0.46 0.58 D .210 .245 5.33 6.22 1 E .250 .265 6.35 6.73 1 e .090 BSC .370 .410 9.40 10.41 L .055 .070 1.40 1.78 .108 REF and L3. 5. Formed leads to be planar with respect to one another at seating place –C-. 4 6. Dimensions and tolerances. 2.29 BSC H L1 1. Dimensions are exclusive of mold flash, metal burrs or interlead protrusion. 2. Stand off-height is measured from lead tip with ref. to Datum –B-. 3. Foot length is measured with ref. to Datum –A– with lead surface. Notes 3 2.74 REF L3 .035 .080 0.89 2.03 L4 .025 .040 0.64 1.02 4 Figure 10. 3-Lead TO-252 Package 8 Advanced Monolithic Systems http://www.ams-semitech.com AMS1117 1A Adjustable/Fixed Low Dropout Linear Regulator Ordering Information Package SOT－223 TO－252 Temperature Range Part Number Output Voltage Packing Marking Transport Media －２０℃ - +125℃ AMS1117-1.2 1.2V AMS1117 1.2 2.5K Tape and Reel －２０℃ - +125℃ AMS1117-1.5 1.5V AMS1117 1.5 2.5K Tape and Reel -20℃ - +125℃ AMS1117-1.8 1.8V AMS1117 1.8 2.5K Tape and Reel -20℃ - +125℃ AMS1117-2.5 2.5V AMS1117 2.5 2.5K Tape and Reel -20℃ - +125℃ AMS1117-2.85 2.85V AMS1117 2.8 2.5K Tape and Reel -20℃ - +125℃ AMS1117-3.3 3.3V AMS1117 3.3 2.5K Tape and Reel -20℃ - +125℃ AMS1117-5 5V AMS1117 5 2.5K Tape and Reel -20℃ - +125℃ AMS1117 -20℃ - +125℃ AMS1117-1.2 -20℃ - +125℃ AMS1117-1.5 -20℃ - +125℃ AMS1117-1.8 -20℃ - +125℃ AMS1117-2.5 -20℃ - +125℃ AMS1117-2.85 -20℃ - +125℃ AMS1117-3.3 -20℃ - +125℃ AMS1117-5 Adjust AMS1117 2.5K Tape and Reel 1.2V AMS1117 1.2 2.5K Tape and Reel 1.5V AMS1117 1.5 2.5K Tape and Reel 1.8V AMS1117 1.8 2.5K Tape and Reel 2.5V AMS1117 2.5 2.5K Tape and Reel 2.85V AMS1117 2.8 2.5K Tape and Reel 3.3V AMS1117 3.3 2.5K Tape and Reel 5.0V AMS1117 5 2.5K Tape and Reel -20℃ - +125℃ AMS1117CD Adjust AMS1117CD 2.5K Tape and Reel Advanced Monolithic Systems http://www.ams-semitech.com Disclaimer: • AMS reserves the right to make changes to the information herein for the improvement of the design and performance without further notice! Customers should obtain the latest relevant information before placing orders and should verify that such information is complete and current. • All semiconductor products malfunction or fail with some probability under special conditions. When using AMS products in system design or complete machine manufacturing, it is the responsibility of the buyer to comply with the safety standards strictly and take essential measures to avoid situations in which a malfunction or failure of such AMS products could cause loss of body injury or damage to property. • AMS will supply the best possible product for customers! The " " logo is a registered trademark of Advanced Monolithic Systems. All other company and product names are trademarks of their respective owners 9 Advanced Monolithic Systems http://www.ams-semitech.com