1A Adjustable/Fixed Low Dropout Linear Regulator

1 AMS1117. 1A Adjustable/Fixed Low Dropout Linear Regulator General Description Key Features The AMS1117-ADJ and , , , , , - Low Dropout voltage and-5 are low Dropout three-terminal regulators with - Load regulation: typical 1A output current capability. These devices have been - Optimized for Low Voltage optimized for low voltage where transient response and - On-chip thermal limiting minimum input voltage are critical. The version is - Standard SOT-223 and TO-252 packages designed specifically to be used in Active Terminators for - Three-terminal adjustable or fixed low Dropout SCSI bus.

2 , , , , , , 5V. regulators On-chip thermal limiting provides protection against any combination of overload and ambient temperatures that Applications would create excessive junction temperatures. - Active SCSI terminators - High efficiency Linear regulators Unlike PNP type regulators where up to 10% of the output - Post regulators for switching supplies current is wasted as quiescent current, the quiescent cur- rent of the AMS1117 flows into the load, increasing effi- - Battery chargers ciency. - 12V to 5V Linear regulators -Motherboard clock supplies The AMS1117 series regulators are available in the indus- try-standard SOT-223 and TO-252 power packages.

3 Typical Application Figure 1. Typical Applications of AMS1117. Notice: The distance between Vout pin and Capacitor should not exceed 4cm for excellent performance Advanced Monolithic Systems 1. AMS1117. 1A Adjustable/Fixed Low Dropout Linear Regulator Pin Assignments Figure 2. Pin Assignments of AMS1117. *With package soldered to square inch copper area over backside ground plane or internal power plane, JA 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. Unit VIN 18 V. (VIN VOUT) * IOUT See Figure 3.

4 Operating Junction Temperature Range -20 125 C. Storage Temperature Range -65 150 C. Lead Temperature (Soldering, 10 sec.) 300. C. Advanced Monolithic Systems 2. 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 . Min Typ Max Symbol Parameter Conditions Units (Note 2) (Note 1) (Note 2).

5 Reference AMS1117. VREF V. Voltage <=(VIN-VOUT)<=7V,10mA<=IOUT<=1A. IOUT = 10mA, VIN = V. , <= VIN<= , <= VIN<= V. , <= VIN<= V. 10mA<=. VOUT Output Voltage ,4V<= VIN<= V. IOUT<=1A. , <= VIN<= V. , <= VIN <= V. , <=VIN <= 12V V. Advanced Monolithic Systems 3. 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 . Min Typ Max Symbol Parameter Conditions Units (Note 2) (Note 1) (Note 2).

6 Line Regultion IOUT=10mA ,(VOUT+ )<=VIN<=12V %. (Note 3). VOUT VIN-VOUT=2V,10mA<= IOUT<=1A, %. Load Regultion (Note 3) 1 %. VIN-VOUT=2V,10mA<= IOUT<=1A, VIN-VOUT Dropout Volage IOUT=1A, VREF=1% V. Current Limit VIN-VOUT= 2V, TJ=25 A. Minimum Load AMS1117-ADJ. 10 mA. Current (Note 4) <=(VIN-VOUT)<=10V. Quiescent Curent VIN=VOUT+ 5 13 mA. Thermal TA = 25 C, 30ms pulse %/W. Regulation Ripple f=120Hz,VIN-VOUT=3V, VRipple=1 VPP 60 72 dB. ILimit Rejection Adjust Pin Current 50 120 A. Adjust Pin Current <=VIN-VOUT<=7V, 10mA<=IOUT<=1A 5 A. Change Temperature %. Stability Long Term TA = 125 C, 1000hrs.

7 %. Stability Advanced Monolithic Systems 4. 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 . Min Typ Max Symbol Parameter Conditions Units (Note 2) (Note 1) (Note 2). RMS Output Noise(% of TA = 25 C, 10Hz<= f <=10kHz %. VOUT). Thermal Resistance, Junction SOT-223 15 /W. ILimit to Case TO-252 3 /W. Thermal Shutdown Junction Temperature 155 . Thermal Shutdown Hysteresis 25.

8 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 Dropout Voltage ( V ). 0. 0 Output Current ( A ). Figure 4. Dropout Voltage VS. Output Current 5. AMS1117. 1A Adjustable/Fixed Low Dropout Linear Regulator Typical performance Characteristics (Continued). ReferenceVoltage( V ). Output Voltage( V ). -75 50 25 0 25 50 75 100 125 150 175 -75 50 25 0 25 50 75 100 125 150 175.

9 Junction Temperature ( ) Junction Temperature ( ). Figure 5. Reference Voltage VS. Temperature Figure 6. Output Voltage VS. Temperature 5 100. Note: 90 AMS1117 Only Minimum Load Current( mA ). 4 80. ADJ Pin Current( A ). 70. 3 60. 50. 2 40. 30. 1 20. 10. 0 0. -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 7. Minimum Load Current VS. Temperature Figure 8. ADJ Pin Current VS. Temperature Advanced Monolithic Systems 6. AMS1117. 1A Adjustable/Fixed Low Dropout Linear Regulator Mechanical Dimensions 4-Lead SOT-223 Package Inches Millimeters Symbol Notes Min.

10 Max. Min. Max. A .071 A1 .181 B .025 .033 .064 .840. c D .248 .264 E .130 .148 e .115 .124 F .033 .041 .840 H .264 .287 I .0121 .310 . J 10 10 . K 10 16 10 16 . L .0008 .0040 .0203 .1018. M 10 16 10 16 . N .010 .014 .250 .360. Figure 9. 4-Lead SOT-223 Package Advanced Monolithic Systems 7. AMS1117. 1A Adjustable/Fixed Low Dropout Linear Regulator Mechanical Dimensions (Continued). 3-Lead TO-252 Package Notes: Inches Millimeters 1. Dimensions are exclusive of mold flash, metal burrs Symbol Notes or interlead protrusion. Min. Max. Min. Max. 2. Stand off-height is measured from lead tip with ref.