LM1117DT-3.3

LM1117/LM1117I 800mA Low-Dropout Linear Regulator April 2006 LM1117/LM1117I 800mA Low-Dropout Linear Regulator General Description The LM1117 is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current. It has the same pin-out as National Semiconductor’s industry standard LM317. The LM1117 is available in an adjustable version, which can set the output voltage from 1.25V to 13.8V with only two external resistors. In addition, it is also available in five fixed voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V. The LM1117 offers current limiting and thermal shutdown. Its circuit includes a zener trimmed bandgap reference to assure output voltage accuracy to within ± 1%. The LM1117 series is available in LLP, TO-263, SOT-223, TO-220, and TO-252 D-PAK packages. A minimum of 10µF tantalum capacitor is required at the output to improve the transient response and stability. Features n Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable Versions n Space Saving SOT-223 and LLP Packages n Current Limiting and Thermal Protection n Output Current 800mA n Line Regulation 0.2% (Max) n Load Regulation 0.4% (Max) n Temperature Range — LM1117 0˚C to 125˚C — LM1117I −40˚C to 125˚C Applications n n n n n 2.85V Model for SCSI-2 Active Termination Post Regulator for Switching DC/DC Converter High Efficiency Linear Regulators Battery Charger Battery Powered Instrumentation Typical Application Active Terminator for SCSI-2 Bus 10091905 Fixed Output Regulator 10091928 © 2006 National Semiconductor Corporation DS100919 www.national.com LM1117/LM1117I Ordering Information Package 3-lead SOT-223 Temperature Range 0˚C to +125˚C Part Number LM1117MPX-ADJ LM1117MPX-1.8 LM1117MPX-2.5 LM1117MPX-2.85 LM1117MPX-3.3 LM1117MPX-5.0 −40˚C to +125˚C LM1117IMPX-ADJ LM1117IMPX-3.3 LM1117IMPX-5.0 3-lead TO-220 0˚C to +125˚C LM1117T-ADJ LM1117T-1.8 LM1117T-2.5 LM1117T-2.85 LM1117T-3.3 LM1117T-5.0 3-lead TO-252 0˚C to +125˚C LM1117DTX-ADJ LM1117DTX-1.8 LM1117DTX-2.5 LM1117DTX-2.85 LM1117DTX-3.3 LM1117DTX-5.0 −40˚C to +125˚C LM1117IDTX-ADJ LM1117IDTX-3.3 LM1117IDTX-5.0 8-lead LLP 0˚C to +125˚C LM1117LDX-ADJ LM1117LDX-1.8 LM1117LDX-2.5 LM1117LDX-2.85 LM1117LDX-3.3 LM1117LDX-5.0 −40˚C to 125˚C LM1117ILDX-ADJ LM1117ILDX-3.3 LM1117ILDX-5.0 TO-263 0˚C to +125˚C LM1117SX-ADJ LM1117SX-2.85 LM1117SX-3.3 LM1117SX-5.0 Packaging Marking N03A N12A N13A N04A N05A N06A N03B N05B N06B LM1117T-ADJ LM1117T-1.8 LM1117T-2.5 LM1117T-2.85 LM1117T-3.3 LM1117T-5.0 LM1117DT-ADJ LM1117DT-1.8 LM1117DT-2.5 LM1117DT-2.85 LM1117DT-3.3 LM1117DT-5.0 LM1117IDT-ADJ LM1117IDT-3.3 LM1117IDT-5.0 1117ADJ 1117-18 1117-25 1117-28 1117-33 1117-50 1117IAD 1117I33 1117I50 LM1117SADJ LM1117S2.85 LM1117S3.3 LM1117S5.0 Transport Media Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Rails Rails Rails Rails Rails Rails Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel TS3B LDC08A TD03B T03B NSC Drawing MP04A www.national.com 2 LM1117/LM1117I Block Diagram 10091901 Connection Diagrams SOT-223 TO-263 10091944 Top View 10091904 Top View 10091945 TO-220 Side View LLP 10091902 Top View TO-252 10091946 When using the LLP package Pins 2, 3 & 4 must be connected together and Pins 5, 6 & 7 must be connected together Top View 10091938 Top View 3 www.national.com LM1117/LM1117I Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Maximum Input Voltage (VIN to GND) Power Dissipation (Note 2) Junction Temperature (TJ) (Note 2) Storage Temperature Range Lead Temperature 20V Internally Limited 150˚C -65˚C to 150˚C TO-220 (T) Package SOT-223 (IMP) Package ESD Tolerance (Note 3) 260˚C, 10 sec 260˚C, 4 sec 2000V Operating Ratings (Note 1) Input Voltage (VIN to GND) Junction Temperature Range (TJ)(Note 2) LM1117 LM1117I 0˚C to 125˚C −40˚C to 125˚C 15V LM1117 Electrical Characteristics Typicals and limits appearing in normal type apply for TJ = 25˚C. Limits appearing in Boldface type apply over the entire junction temperature range for operation, 0˚C to 125˚C. Symbol VREF Parameter Reference Voltage Conditions LM1117-ADJ IOUT = 10mA, VIN-VOUT = 2V, TJ = 25˚C 10mA ≤ IOUT ≤ 800mA, 1.4V ≤ VIN-VOUT ≤ 10V LM1117-1.8 IOUT = 10mA, VIN = 3.8V, TJ = 25˚C 0 ≤ IOUT ≤ 800mA, 3.2V ≤ VIN ≤ 10V LM1117-2.5 IOUT = 10mA, VIN = 4.5V, TJ = 25˚C 0 ≤ IOUT ≤ 800mA, 3.9V ≤ VIN ≤ 10V LM1117-2.85 IOUT = 10mA, VIN = 4.85V, TJ = 25˚C 0 ≤ IOUT ≤ 800mA, 4.25V ≤ VIN ≤ 10V 0 ≤ IOUT ≤ 500mA, VIN = 4.10V LM1117-3.3 IOUT = 10mA, VIN = 5V TJ = 25˚C 0 ≤ IOUT ≤ 800mA, 4.75V≤ VIN ≤ 10V LM1117-5.0 IOUT = 10mA, VIN = 7V, TJ = 25˚C 0 ≤ IOUT ≤ 800mA, 6.5V ≤ VIN ≤ 12V ∆VOUT Line Regulation (Note 6) LM1117-ADJ IOUT = 10mA, 1.5V ≤ VIN-VOUT ≤ 13.75V LM1117-1.8 IOUT = 0mA, 3.2V ≤ VIN ≤ 10V LM1117-2.5 IOUT = 0mA, 3.9V ≤ VIN ≤ 10V LM1117-2.85 IOUT = 0mA, 4.25V ≤ VIN ≤ 10V LM1117-3.3 IOUT = 0mA, 4.75V ≤ VIN ≤ 15V LM1117-5.0 IOUT = 0mA, 6.5V ≤ VIN ≤ 15V Min (Note 5) 1.238 1.225 Typ (Note 4) 1.250 1.250 Max (Note 5) 1.262 1.270 Units V V VOUT Output Voltage 1.782 1.746 2.475 2.450 2.820 2.790 2.790 3.267 3.235 4.950 4.900 1.800 1.800 2.500 2.500 2.850 2.850 2.850 3.300 3.300 5.000 5.000 0.035 1 1 1.818 1.854 2.525 2.550 2.880 2.910 2.910 3.333 3.365 5.050 5.100 0.2 6 6 V V V V V V V V V V V % mV mV 1 1 1 6 6 10 mV mV mV www.national.com 4 LM1117/LM1117I LM1117 Electrical Characteristics (Continued) Typicals and limits appearing in normal type apply for TJ = 25˚C. Limits appearing in Boldface type apply over the entire junction temperature range for operation, 0˚C to 125˚C. Parameter Load Regulation (Note 6) Conditions LM1117-ADJ VIN-VOUT = 3V, 10 ≤ IOUT ≤ 800mA LM1117-1.8 VIN = 3.2V, 0 ≤ IOUT ≤ 800mA LM1117-2.5 VIN = 3.9V, 0 ≤ IOUT ≤ 800mA LM1117-2.85 VIN = 4.25V, 0 ≤ IOUT ≤ 800mA LM1117-3.3 VIN = 4.75V, 0 ≤ IOUT ≤ 800mA LM1117-5.0 VIN = 6.5V, 0 ≤ IOUT ≤ 800mA Min (Note 5) Typ (Note 4) 0.2 1 1 Max (Note 5) 0.4 10 10 Units Symbol ∆VOUT % mV mV 1 1 1 1.10 1.15 1.20 800 1200 1.7 5 5 10 10 15 1.20 1.25 1.30 1500 5 10 10 mV mV mV V V V mA mA mA mA VIN-V OUT Dropout Voltage (Note 7) Current Limit Minimum Load Current (Note 8) Quiescent Current IOUT = 100mA IOUT = 500mA IOUT = 800mA VIN-VOUT = 5V, TJ = 25˚C LM1117-ADJ VIN = 15V LM1117-1.8 VIN ≤ 15V LM1117-2.5 VIN ≤ 15V LM1117-2.85 VIN ≤ 10V LM1117-3.3 VIN ≤ 15V LM1117-5.0 VIN ≤ 15V ILIMIT 5 5 5 0.01 60 75 60 10 10 10 0.1 mA mA mA %/W dB Thermal Regulation Ripple Regulation Adjust Pin Current Adjust Pin Current Change Temperature Stability Long Term Stability RMS Output Noise Thermal Resistance Junction-to-Case Thermal Resistance Junction-to-Ambient (No air flow) TA = 25˚C, 30ms Pulse fRIPPLE =1 20Hz, VIN-VOUT = 3V VRIPPLE = 1VPP 10 ≤ IOUT≤ 800mA, 1.4V ≤ VIN-VOUT ≤ 10V TA = 125˚C, 1000Hrs (% of VOUT), 10Hz ≤ f ≤10kHz 3-Lead SOT-223 3-Lead TO-220 3-Lead TO-252 3-Lead SOT-223 (No heat sink) 3-Lead TO-220 (No heat sink) 3-Lead TO-252 (Note 9) (No heat sink) 3-Lead TO-263 8-Lead LLP(Note 10) 120 5 µA µA % % % ˚C/W ˚C/W ˚C/W ˚C/W ˚C/W ˚C/W ˚C/W ˚C/W 0.2 0.5 0.3 0.003 15.0 3.0 10 136 79 92 55 40 5 www.national.com LM1117/LM1117I LM1117I Electrical Characteristics Typicals and limits appearing in normal type apply for TJ = 25˚C. Limits appearing in Boldface type apply over the entire junction temperature range for operation, −40˚C to 125˚C. Symbol VREF Parameter Reference Voltage Conditions LM1117I-ADJ IOUT = 10mA, VIN-VOUT = 2V, TJ = 25˚C 10mA ≤ IOUT ≤ 800mA, 1.4V ≤ VIN-VOUT ≤ 10V LM1117I-3.3 IOUT = 10mA, VIN = 5V, TJ = 25˚C 0 ≤ IOUT ≤ 800mA, 4.75V ≤ VIN ≤ 10V LM1117I-5.0 IOUT = 10mA, VIN = 7V, TJ = 25˚C 0 ≤ IOUT ≤ 800mA, 6.5V ≤ VIN ≤ 12V ∆VOUT Line Regulation (Note 6) LM1117I-ADJ IOUT = 10mA, 1.5V ≤ VIN-VOUT ≤ 13.75V LM1117I-3.3 IOUT = 0mA, 4.75V ≤ VIN ≤ 15V LM1117I-5.0 IOUT = 0mA, 6.5V ≤ VIN ≤ 15V ∆VOUT Load Regulation (Note 6) LM1117I-ADJ VIN-VOUT = 3V, 10 ≤ IOUT ≤ 800mA LM1117I-3.3 VIN = 4.75V, 0 ≤ IOUT ≤ 800mA LM1117I-5.0 VIN = 6.5V, 0 ≤ IOUT ≤ 800mA VIN-V OUT Dropout Voltage (Note 7) Current Limit Minimum Load Current (Note 8) Quiescent Current IOUT = 100mA IOUT = 500mA IOUT = 800mA ILIMIT VIN-VOUT = 5V, TJ = 25˚C LM1117I-ADJ VIN = 15V LM1117I-3.3 VIN ≤ 15V LM1117I-5.0 VIN ≤ 15V Thermal Regulation Ripple Regulation Adjust Pin Current Adjust Pin Current Change Temperature Stability Long Term Stability RMS Output Noise Thermal Resistance Junction-to-Case Thermal Resistance Junction-to-Ambient No air flow) TA = 125˚C, 1000Hrs (% of VOUT), 10Hz ≤ f ≤10kHz 3-Lead SOT-223 3-Lead TO-252 3-Lead SOT-223 (No heat sink) 3-Lead TO-252 (No heat sink)(Note 9) 8-Lead LLP(Note 10) 10 ≤ IOUT≤ 800mA, 1.4V ≤ VIN-VOUT ≤ 10V TA = 25˚C, 30ms Pulse fRIPPLE =1 20Hz, VIN-VOUT = 3V VRIPPLE = 1VPP 60 800 Min (Note 5) 1.238 1.200 Typ (Note 4) 1.250 1.250 Max (Note 5) 1.262 1.290 Units V V VOUT Output Voltage 3.267 3.168 4.950 4.800 3.300 3.300 5.000 5.000 0.035 1 1 0.2 1 1 1.10 1.15 1.20 1200 1.7 5 5 0.01 75 60 0.2 0.5 0.3 0.003 15.0 10 136 92 40 3.333 3.432 5.050 5.200 0.3 10 15 0.5 15 20 1.30 1.35 1.40 1500 5 15 15 0.1 V V V V % mV mV % mV mV V V V mA mA mA mA %/W dB 120 10 µA µA % % % ˚C/W ˚C/W ˚C/W ˚C/W ˚C/W Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics. www.national.com 6 LM1117/LM1117I Note 2: The maximum power dissipation is a function of TJ(max) , θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(max)–TA)/θJA. All numbers apply for packages soldered directly into a PC board. Note 3: For testing purposes, ESD was applied using human body model, 1.5kΩ in series with 100pF. Note 4: Typical Values represent the most likely parametric norm. Note 5: All limits are guaranteed by testing or statistical analysis. Note 6: Load and line regulation are measured at constant junction room temperature. Note 7: The dropout voltage is the input/output differential at which the circuit ceases to regulate against further reduction in input voltage. It is measured when the output voltage has dropped 100mV from the nominal value obtained at VIN = VOUT +1.5V. Note 8: The minimum output current required to maintain regulation. Note 9: Minimum pad size of 0.038in2 Note 10: Thermal Performance for the LLP was obtained using JESD51-7 board with six vias and an ambient temperature of 22˚C. For information about improved thermal performance and power dissipation for the LLP, refer to Application Note AN-1187. Typical Performance Characteristics Dropout Voltage (VIN-V OUT) Short-Circuit Current 10091922 10091923 Load Regulation LM1117-ADJ Ripple Rejection 10091943 10091906 7 www.national.com LM1117/LM1117I Typical Performance Characteristics LM1117-ADJ Ripple Rejection vs. Current (Continued) Temperature Stability 10091907 10091925 Adjust Pin Current LM1117-2.85 Load Transient Response 10091926 10091908 LM1117-5.0 Load Transient Response LM1117-2.85 Line Transient Response 10091909 10091910 www.national.com 8 LM1117/LM1117I Typical Performance Characteristics LM1117-5.0 Line Transient Response (Continued) 10091911 Application Note 1.0 EXTERNAL CAPACITORS/STABILITY 1.1 Input Bypass Capacitor An input capacitor is recommended. A 10µF tantalum on the input is a suitable input bypassing for almost all applications. 1.2 Adjust Terminal Bypass Capacitor The adjust terminal can be bypassed to ground with a bypass capacitor (CADJ) to improve ripple rejection. This bypass capacitor prevents ripple from being amplified as the output voltage is increased. At any ripple frequency, the impedance of the CADJ should be less than R1 to prevent the ripple from being amplified: 1/(2π*fRIPPLE*CADJ) < R1 The R1 is the resistor between the output and the adjust pin. Its value is normally in the range of 100-200Ω. For example, with R1 = 124Ω and fRIPPLE = 120Hz, the CADJ should be > 11µF. 1.3 Output Capacitor The output capacitor is critical in maintaining regulator stability, and must meet the required conditions for both minimum amount of capacitance and ESR (Equivalent Series Resistance). The minimum output capacitance required by the LM1117 is 10µF, if a tantalum capacitor is used. Any increase of the output capacitance will merely improve the loop stability and transient response. The ESR of the output capacitor should range between 0.3Ω - 22Ω. In the case of the adjustable regulator, when the CADJ is used, a larger output capacitance (22µf tantalum) is required. 2.0 OUTPUT VOLTAGE The LM1117 adjustable version develops a 1.25V reference voltage, VREF, between the output and the adjust terminal. As shown in Figure 1, this voltage is applied across resistor R1 to generate a constant current I1. The current IADJ from the adjust terminal could introduce error to the output. But since it is very small (60µA) compared with the I1 and very constant with line and load changes, the error can be ig- nored. The constant current I1 then flows through the output set resistor R2 and sets the output voltage to the desired level. For fixed voltage devices, R1 and R2 are integrated inside the devices. 10091917 FIGURE 1. Basic Adjustable Regulator 3.0 LOAD REGULATION The LM1117 regulates the voltage that appears between its output and ground pins, or between its output and adjust pins. In some cases, line resistances can introduce errors to the voltage across the load. To obtain the best load regulation, a few precautions are needed. Figure 2, shows a typical application using a fixed output regulator. The Rt1 and Rt2 are the line resistances. It is obvious that the VLOAD is less than the VOUT by the sum of the voltage drops along the line resistances. In this case, the load regulation seen at the RLOAD would be degraded from the data sheet specification. To improve this, the load should be tied directly to the output terminal on the positive side and directly tied to the ground terminal on the negative side. 9 www.national.com LM1117/LM1117I Application Note (Continued) can withstand microsecond surge currents of 10A to 20A. With an extremely large output capacitor (≥1000 µF), and with input instantaneously shorted to ground, the regulator could be damaged. In this case, an external diode is recommended between the output and input pins to protect the regulator, as shown in Figure 4. 10091918 FIGURE 2. Typical Application using Fixed Output Regulator When the adjustable regulator is used (Figure 3), the best performance is obtained with the positive side of the resistor R1 tied directly to the output terminal of the regulator rather than near the load. This eliminates line drops from appearing effectively in series with the reference and degrading regulation. For example, a 5V regulator with 0.05Ω resistance between the regulator and load will have a load regulation due to line resistance of 0.05Ω x IL. If R1 (=125Ω) is connected near the load, the effective line resistance will be 0.05Ω (1+R2/R1) or in this case, it is 4 times worse. In addition, the ground side of the resistor R2 can be returned near the ground of the load to provide remote ground sensing and improve load regulation. 10091915 FIGURE 4. Regulator with Protection Diode 5.0 HEATSINK REQUIREMENTS When an integrated circuit operates with an appreciable current, its junction temperature is elevated. It is important to quantify its thermal limits in order to achieve acceptable performance and reliability. This limit is determined by summing the individual parts consisting of a series of temperature rises from the semiconductor junction to the operating environment. A one-dimensional steady-state model of conduction heat transfer is demonstrated in Figure 5. The heat generated at the device junction flows through the die to the die attach pad, through the lead frame to the surrounding case material, to the printed circuit board, and eventually to the ambient environment. Below is a list of variables that may affect the thermal resistance and in turn the need for a heatsink. RθJC (Component Variables) Rθ CA (Application Variables) 10091919 Leadframe Size & Material Mounting Pad Size, Material, & Location No. of Conduction Pins Die Size Placement of Mounting Pad PCB Size & Material Traces Length & Width Adjacent Heat Sources Volume of Air Ambient Temperatue Shape of Mounting Pad FIGURE 3. Best Load Regulation using Adjustable Output Regulator 4.0 PROTECTION DIODES Under normal operation, the LM1117 regulators do not need any protection diode. With the adjustable device, the internal resistance between the adjust and output terminals limits the current. No diode is needed to divert the current around the regulator even with capacitor on the adjust terminal. The adjust pin can take a transient signal of ± 25V with respect to the output voltage without damaging the device. When a output capacitor is connected to a regulator and the input is shorted to ground, the output capacitor will discharge into the output of the regulator. The discharge current depends on the value of the capacitor, the output voltage of the regulator, and rate of decrease of VIN. In the LM1117 regulators, the internal diode between the output and input pins www.national.com 10 Die Attach Material Molding Compound Size and Material LM1117/LM1117I Application Note (Continued) The next parameter which must be calculated is the maximum allowable temperature rise, TR(max): TR(max) = TJ(max)-TA(max) where TJ(max) is the maximum allowable junction temperature (125˚C), and TA(max) is the maximum ambient temperature which will be encountered in the application. Using the calculated values for TR(max) and PD, the maximum allowable value for the junction-to-ambient thermal resistance (θJA) can be calculated: θJA = TR(max)/PD If the maximum allowable value for θJA is found to be ≥136˚C/W for SOT-223 package or ≥79˚C/W for TO-220 package or ≥92˚C/W for TO-252 package, no heatsink is needed since the package alone will dissipate enough heat to satisfy these requirements. If the calculated value for θJA falls below these limits, a heatsink is required. As a design aid, Table 1 shows the value of the θJA of SOT-223 and TO-252 for different heatsink area. The copper patterns that we used to measure these θJAs are shown at the end of the Application Notes Section. Figure 7 and Figure 8 reflects the same test results as what are in the Table 1 Figure 9 and Figure 10 shows the maximum allowable power dissipation vs. ambient temperature for the SOT-223 and TO-252 device. Figures Figure 11 and Figure 12 shows the maximum allowable power dissipation vs. copper area (in2) for the SOT-223 and TO-252 devices. Please see AN1028 for power enhancement techniques to be used with SOT-223 and TO-252 packages. *Application Note AN-1187 discusses improved thermal performance and power dissipation for the LLP. 10091937 FIGURE 5. Cross-sectional view of Integrated Circuit Mounted on a printed circuit board. Note that the case temperature is measured at the point where the leads contact with the mounting pad surface The LM1117 regulators have internal thermal shutdown to protect the device from over-heating. Under all possible operating conditions, the junction temperature of the LM1117 must be within the range of 0˚C to 125˚C. A heatsink may be required depending on the maximum power dissipation and maximum ambient temperature of the application. To determine if a heatsink is needed, the power dissipated by the regulator, PD , must be calculated: IIN = IL + IG PD = (VIN-VOUT)I L + VINIG Figure 6 shows the voltages and currents which are present in the circuit. 10091916 FIGURE 6. Power Dissipation Diagram TABLE 1. θJA Different Heatsink Area Layout 1 2 3 4 5 6 7 8 9 10 11 12 13 0.0123 0.066 0.3 0.53 0.76 1 0 0 0 0 0 0.066 0.175 Copper Area Top Side (in2)* Bottom Side (in2) 0 0 0 0 0 0 0.2 0.4 0.6 0.8 1 0.066 0.175 136 123 84 75 69 66 115 98 89 82 79 125 93 Thermal Resistance (θJA,˚C/W) SOT-223 (θJA,˚C/W) TO-252 103 87 60 54 52 47 84 70 63 57 57 89 72 11 www.national.com LM1117/LM1117I Application Note Layout 14 15 16 (Continued) TABLE 1. θJA Different Heatsink Area (Continued) Copper Area 0.284 0.392 0.5 0.284 0.392 0.5 83 75 70 Thermal Resistance 61 55 53 *Tab of device attached to topside copper www.national.com 12 LM1117/LM1117I Application Note (Continued) 10091936 10091913 FIGURE 10. Maximum Allowable Power Dissipation vs. Ambient Temperature for TO-252 FIGURE 7. θJA vs. 1oz Copper Area for SOT-223 10091934 10091914 FIGURE 8. θJA vs. 2oz Copper Area for TO-252 FIGURE 11. Maximum Allowable Power Dissipation vs. 1oz Copper Area for SOT-223 10091912 10091935 FIGURE 9. Maximum Allowable Power Dissipation vs. Ambient Temperature for SOT-223 FIGURE 12. Maximum Allowable Power Dissipation vs. 2oz Copper Area for TO-252 13 www.national.com LM1117/LM1117I Application Note (Continued) 10091941 FIGURE 13. Top View of the Thermal Test Pattern in Actual Scale www.national.com 14 LM1117/LM1117I Application Note (Continued) 10091942 FIGURE 14. Bottom View of the Thermal Test Pattern in Actual Scale 15 www.national.com LM1117/LM1117I Typical Application Circuits 10091930 10091927 Adjusting Output of Fixed Regulators 5V Logic Regulator with Electronic Shutdown* 10091931 Regulator with Reference 10091929 1.25V to 10V Adjustable Regulator with Improved Ripple Rejection www.national.com 16 LM1117/LM1117I Typical Application Circuits (Continued) 10091932 Battery Backed-Up Regulated Supply 10091933 Low Dropout Negative Supply 17 www.national.com LM1117/LM1117I Physical Dimensions inches (millimeters) unless otherwise noted 3-Lead SOT-223 NS Package Number MP04A 3-Lead TO-220 NS Package Number T03B www.national.com 18 LM1117/LM1117I Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 3-Lead TO-263 NS Package Number TS3B 19 www.national.com LM1117/LM1117I Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 3-Lead TO-252 NS Package Number TD03B 8-Lead LLP NS Package Number LDC08A www.national.com 20 LM1117/LM1117I 800mA Low-Dropout Linear Regulator Notes National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. 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