LM1117/LM1117I 800mA Low-Dropout Linear Regulator General Description Features 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 SOT-223, TO-220, and TO-252 D-PAK packages. A minimum of 10F tantalum capacitor is required at the output to improve the transient response and stability. n Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable Versions n Space Saving SOT-223 Package 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 0C to 125C -- LM1117I -40C to 125C 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 DS100919-5 Fixed Output Regulator DS100919-28 (c) 2001 National Semiconductor Corporation DS100919 www.national.com LM1117/LM1117I 800mA Low-Dropout Linear Regulator December 2001 LM1117/LM1117I Ordering Information Package 3-lead SOT-223 Temperature Range Part Number Packaging Marking Transport Media NSC Drawing 0C to +125C LM1117MPX-ADJ N03A Tape and Reel MA04A LM1117MPX-1.8 N12A Tape and Reel LM1117MPX-2.5 N13A Tape and Reel LM1117MPX-2.85 N04A Tape and Reel LM1117MPX-3.3 N05A Tape and Reel Tape and Reel -40C to +125C 3-lead TO-220 3-lead TO-252 0C to +125C 0C to +125C -40C to +125C LM1117MPX-5.0 N06A LM1117IMPX-ADJ N03B Tape and Reel LM1117IMPX-3.3 N05B Tape and Reel LM1117IMPX-5.0 N06B Tape and Reel LM1117T-ADJ LM1117T-ADJ Rails LM1117T-2.85 LM1117T-2.85 Rails LM1117T-3.3 LM1117T-3.3 Rails LM1117T-5.0 LM1117T-5.0 Rails LM1117DTX-ADJ LM1117DT-ADJ Tape and Reel LM1117DTX-1.8 LM1117DT-1.8 Tape and Reel Tape and Reel LM1117DTX-2.5 LM1117DT-2.5 LM1117DTX-2.85 LM1117DT-2.85 Tape and Reel LM1117DTX-3.3 LM1117DT-3.3 Tape and Reel LM1117DTX-5.0 LM1117DT-5.0 Tape and Reel LM1117IDTX-ADJ LM1117IDT-ADJ Tape and Reel LM1117IDTX-3.3 LM1117IDT-3.3 Tape and Reel LM1117IDTX-5.0 LM1117IDT-5.0 Tape and Reel T03B TD03B Block Diagram DS100919-1 www.national.com 2 LM1117/LM1117I Connection Diagrams SOT-223 DS100919-4 Top View TO-220 DS100919-2 Top View TO-252 DS100919-38 Top View 3 www.national.com LM1117/LM1117I Absolute Maximum Ratings (Note 1) SOT-223 (IMP) Package 260C, 4 sec If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 3) 2000V Operating Ratings (Note 1) Maximum Input Voltage (VIN to GND) Input Voltage (VIN to GND) LM1117-ADJ, LM1117-1.8, LM1117-2.5, LM1117-3.3, LM1117-5.0, LM1117I-ADJ, LM1117I-3.3, LM1117I-5.0 20V LM1117-ADJ, LM1117-1.8, LM1117-2.5, LM1117-3.3, LM1117-5.0, LM1117I-ADJ, LM1117I-3.3, LM1117I-5.0 15V Power Dissipation (Note 2) Internally Limited LM1117-2.85 10V Junction Temperature (TJ) (Note 2) Storage Temperature Range Junction Temperature Range (TJ)(Note 2) 150C -65C to 150C LM1117 0C to 125C LM1117I -40C to 125C Lead Temperature TO-220 (T) Package 260C, 10 sec LM1117 Electrical Characteristics Typicals and limits appearing in normal type apply for TJ = 25C. Limits appearing in Boldface type apply over the entire junction temperature range for operation, 0C to 125C. Symbol VREF VOUT VOUT Parameter Reference Voltage Output Voltage Line Regulation (Note 6) www.national.com Conditions Min (Note 5) Typ (Note 4) Max (Note 5) Units LM1117-ADJ IOUT = 10mA, VIN-VOUT = 2V, TJ = 25C 10mA IOUT 800mA, 1.4V VIN-VOUT 10V 1.238 1.225 1.250 1.250 1.262 1.270 V V LM1117-1.8 IOUT = 10mA, VIN = 3.8V, TJ = 25C 0 IOUT 800mA, 3.2V VIN 10V 1.782 1.746 1.800 1.800 1.818 1.854 V V LM1117-2.5 IOUT = 10mA, VIN = 4.5V, TJ = 25C 0 IOUT 800mA, 3.9V VIN 10V 2.475 2.450 2.500 2.500 2.525 2.550 V V LM1117-2.85 IOUT = 10mA, VIN = 4.85V, TJ = 25C 0 IOUT 800mA, 4.25V VIN 10V 0 IOUT 500mA, VIN = 4.10V 2.820 2.790 2.790 2.850 2.850 2.850 2.880 2.910 2.910 V V V LM1117-3.3 IOUT = 10mA, VIN = 5V TJ = 25C 0 IOUT 800mA, 4.75V VIN 10V 3.267 3.235 3.300 3.300 3.333 3.365 V V LM1117-5.0 IOUT = 10mA, VIN = 7V, TJ = 25C 0 IOUT 800mA, 6.5V VIN 12V 4.950 4.900 5.000 5.000 5.050 5.100 V V 0.035 0.2 % LM1117-1.8 IOUT = 0mA, 3.2V VIN 10V 1 6 mV LM1117-2.5 IOUT = 0mA, 3.9V VIN 10V 1 6 mV LM1117-2.85 IOUT = 0mA, 4.25V VIN 10V 1 6 mV LM1117-3.3 IOUT = 0mA, 4.75V VIN 15V 1 6 mV LM1117-5.0 IOUT = 0mA, 6.5V VIN 15V 1 10 mV LM1117-ADJ IOUT = 10mA, 1.5V VIN-VOUT 13.75V 4 (Continued) Typicals and limits appearing in normal type apply for TJ = 25C. Limits appearing in Boldface type apply over the entire junction temperature range for operation, 0C to 125C. Symbol VOUT Parameter Load Regulation (Note 6) Min (Note 5) Conditions LM1117-ADJ VIN-VOUT = 3V, 10 IOUT 800mA ILIMIT Dropout Voltage (Note 7) Max (Note 5) Units 0.2 0.4 % LM1117-1.8 VIN = 3.2V, 0 IOUT 800mA 1 10 mV LM1117-2.5 VIN = 3.9V, 0 IOUT 800mA 1 10 mV LM1117-2.85 VIN = 4.25V, 0 IOUT 800mA 1 10 mV LM1117-3.3 VIN = 4.75V, 0 IOUT 800mA 1 10 mV LM1117-5.0 VIN = 6.5V, 0 IOUT 800mA VIN-V OUT Typ (Note 4) 1 15 mV IOUT = 100mA 1.10 1.20 V IOUT = 500mA 1.15 1.25 V IOUT = 800mA 1.20 1.30 V 1200 1500 mA Current Limit VIN-VOUT = 5V, TJ = 25C 800 Minimum Load Current (Note 8) LM1117-ADJ VIN = 15V 1.7 5 mA Quiescent Current LM1117-1.8 VIN 15V 5 10 mA LM1117-2.5 VIN 15V 5 10 mA LM1117-2.85 VIN 10V 5 10 mA LM1117-3.3 VIN 15V 5 10 mA LM1117-5.0 VIN 15V Thermal Regulation TA = 25C, 30ms Pulse Ripple Regulation fRIPPLE =1 20Hz, VIN-VOUT = 3V VRIPPLE = 1VPP Adjust Pin Current Adjust Pin Current Change 10 mA 0.1 %/W 75 dB 60 120 A 10 IOUT 800mA, 1.4V VIN-VOUT 10V 0.2 5 A 0.5 % TA = 125C, 1000Hrs 0.3 % Temperature Stability Long Term Stability 60 5 0.01 RMS Output Noise (% of VOUT), 10Hz f 10kHz 0.003 % Thermal Resistance Junction-to-Case 3-Lead SOT-223 3-Lead TO-220 3-Lead TO-252 15.0 3.0 10 C/W C/W C/W Thermal Resistance Junction-to-Ambient (No heat sink; No air flow) 3-Lead SOT-223 3-Lead TO-220 3-Lead TO-252 (Note 9) 136 79 92 C/W C/W C/W 5 www.national.com LM1117/LM1117I LM1117 Electrical Characteristics LM1117/LM1117I LM1117I Electrical Characteristics Typicals and limits appearing in normal type apply for TJ = 25C. Limits appearing in Boldface type apply over the entire junction temperature range for operation, -40C to 125C. Symbol VREF Reference Voltage Output Voltage VOUT VOUT VOUT Conditions Min (Note 5) Typ (Note 4) Max (Note 5) Units LM1117I-ADJ IOUT = 10mA, VIN-VOUT = 2V, TJ = 25C 10mA IOUT 800mA, 1.4V VIN-VOUT 10V 1.238 1.200 1.250 1.250 1.262 1.290 V V LM1117I-3.3 IOUT = 10mA, VIN = 5V, TJ = 25C 0 IOUT 800mA, 4.75V VIN 10V 3.267 3.168 3.300 3.300 3.333 3.432 V V LM1117I-5.0 IOUT = 10mA, VIN = 7V, TJ = 25C 0 IOUT 800mA, 6.5V VIN 12V 4.950 4.800 5.000 5.000 5.050 5.200 V V 0.035 0.3 % LM1117I-3.3 IOUT = 0mA, 4.75V VIN 15V 1 10 mV LM1117I-5.0 IOUT = 0mA, 6.5V VIN 15V 1 15 mV 0.2 0.5 % 1 15 mV Parameter Line Regulation (Note 6) Load Regulation (Note 6) LM1117I-ADJ IOUT = 10mA, 1.5V VIN-VOUT 13.75V 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 1 20 mV Dropout Voltage (Note 7) IOUT = 100mA 1.10 1.30 V IOUT = 500mA 1.15 1.35 V Current Limit VIN-VOUT = 5V, TJ = 25C Minimum Load Current (Note 8) IOUT = 800mA ILIMIT Quiescent Current 1.20 1.40 V 1200 1500 mA LM1117I-ADJ VIN = 15V 1.7 5 mA LM1117I-3.3 VIN 15V 5 15 mA LM1117I-5.0 VIN 15V 5 15 mA 0.01 0.1 %/W 800 Thermal Regulation TA = 25C, 30ms Pulse Ripple Regulation fRIPPLE =1 20Hz, VIN-VOUT = 3V VRIPPLE = 1VPP Adjust Pin Current Adjust Pin Current Change 10 IOUT 800mA, 1.4V VIN-VOUT 10V Temperature Stability 60 75 dB 60 120 A 0.2 10 A 0.5 % Long Term Stability TA = 125C, 1000Hrs 0.3 % RMS Output Noise (% of VOUT), 10Hz f 10kHz 0.003 % Thermal Resistance Junction-to-Case 3-Lead SOT-223 -Lead TO-252 15.0 10 C/W C/W Thermal Resistance Junction-to-Ambient (No heat sink; No air flow) 3-Lead SOT-223 3-Lead TO-252 (Note 9) 136 92 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. Note 2: The maximum power dissipation is a function of TJ(max) , JA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(max)-TA)/JA. All numbers apply for packages soldered directly into a PC board. www.national.com 6 (Continued) Note 3: For testing purposes, ESD was applied using human body model, 1.5k 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 Typical Performance Characteristics Dropout Voltage (VIN-V OUT) Short-Circuit Current DS100919-22 DS100919-23 Load Regulation LM1117-ADJ Ripple Rejection DS100919-43 DS100919-6 7 www.national.com LM1117/LM1117I LM1117I Electrical Characteristics LM1117/LM1117I Typical Performance Characteristics (Continued) LM1117-ADJ Ripple Rejection vs. Current Temperature Stability DS100919-25 DS100919-7 Adjust Pin Current LM1117-2.85 Load Transient Response DS100919-26 DS100919-8 LM1117-5.0 Load Transient Response LM1117-2.85 Line Transient Response DS100919-9 www.national.com DS100919-10 8 LM1117/LM1117I Typical Performance Characteristics (Continued) LM1117-5.0 Line Transient Response DS100919-11 APPLICATION NOTE 1.0 External Capacitors/Stability 1.1 Input Bypass Capacitor An input capacitor is recommended. A 10F 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/(2*fRIPPLE*CADJ) < R1 The R1 is the resistor between the output and the adjust pin. Its value is normally in the range of 100-200. For example, with R1 = 124 and fRIPPLE = 120Hz, the CADJ should be > 11F. 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 10F, 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 be less than 0.5. In the case of the adjustable regulator, when the CADJ is used, a larger output capacitance (22f 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 (60A) compared with the I1 and very constant with line and load changes, the error can be ignored. 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. DS100919-17 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. DS100919-18 FIGURE 2. Typical Application using Fixed Output Regulator 9 www.national.com LM1117/LM1117I APPLICATION NOTE (Continued) 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 0.05 resistance between the regulator and load will have a load regulation due to line resistance of 0.05 x IL. If R1 (=125) is connected near the load, the effective line resistance will be 0.05 (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. DS100919-15 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. DS100919-19 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 can withstand microsecond surge currents of 10A to 20A. With an extremely large output capacitor (1000 F), 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. RJC(Component Variables) RCA (Application Variables) Leadframe Size & Material Mounting Pad Size, Material, & Location No. of Conduction Pins Placement of Mounting Pad Die Size PCB Size & Material Die Attach Material Traces Length & Width Molding Compound Size and Material Adjacent Heat Sources Volume of Air Ambient Temperatue Shape of Mounting Pad DS100919-37 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 www.national.com 10 The next parameter which must be calculated is the maximum allowable temperature rise, TR(max): (Continued) 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 0C to 125C. 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 TR(max) = TJ(max)-TA(max) where TJ(max) is the maximum allowable junction temperature (125C), 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 (JA) can be calculated: JA = TR(max)/PD If the maximum allowable value for JA is found to be 136C/W for SOT-223 package or 79C/W for TO-220 package or 92C/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 JA falls below these limits, a heatsink is required. As a design aid, Table 1 shows the value of the JA of SOT-223 and TO-252 for different heatsink area. The copper patterns that we used to measure these JAs 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. + VINIG Figure 6 shows the voltages and currents which are present in the circuit. DS100919-16 FIGURE 6. Power Dissipation Diagram TABLE 1. JA Different Heatsink Area Layout Copper Area 2 Thermal Resistance 2 Top Side (in )* Bottom Side (in ) (JA,C/W) SOT-223 (JA,C/W) TO-252 1 0.0123 0 136 103 2 0.066 0 123 87 3 0.3 0 84 60 4 0.53 0 75 54 5 0.76 0 69 52 6 1 0 66 47 7 0 0.2 115 84 8 0 0.4 98 70 9 0 0.6 89 63 10 0 0.8 82 57 11 0 1 79 57 12 0.066 0.066 125 89 13 0.175 0.175 93 72 14 0.284 0.284 83 61 15 0.392 0.392 75 55 16 0.5 0.5 70 53 *Tab of device attached to topside copper 11 www.national.com LM1117/LM1117I APPLICATION NOTE LM1117/LM1117I APPLICATION NOTE (Continued) DS100919-36 FIGURE 10. Maximum Allowable Power Dissipation vs. Ambient Temperature for TO-252 DS100919-13 FIGURE 7. JA vs. 1oz Copper Area for SOT-223 DS100919-14 DS100919-34 FIGURE 8. JA vs. 2oz Copper Area for TO-252 FIGURE 11. Maximum Allowable Power Dissipation vs. 1oz Copper Area for SOT-223 DS100919-12 DS100919-35 FIGURE 9. Maximum Allowable Power Dissipation vs. Ambient Temperature for SOT-223 www.national.com FIGURE 12. Maximum Allowable Power Dissipation vs. 2oz Copper Area for TO-252 12 LM1117/LM1117I APPLICATION NOTE (Continued) DS100919-41 FIGURE 13. Top View of the Thermal Test Pattern in Actual Scale 13 www.national.com LM1117/LM1117I APPLICATION NOTE (Continued) DS100919-42 FIGURE 14. Bottom View of the Thermal Test Pattern in Actual Scale www.national.com 14 LM1117/LM1117I Typical Application Circuits DS100919-31 DS100919-30 Regulator with Reference Adjusting Output of Fixed Regulators DS100919-27 5V Logic Regulator with Electronic Shutdown* DS100919-29 1.25V to 10V Adjustable Regulator with Improved Ripple Rejection DS100919-32 Battery Backed-Up Regulated Supply 15 www.national.com LM1117/LM1117I Typical Application Circuits (Continued) DS100919-33 Low Dropout Negative Supply www.national.com 16 LM1117/LM1117I Physical Dimensions inches (millimeters) unless otherwise noted 3-Lead SOT-223 NS Package Number MA04A 17 www.national.com LM1117/LM1117I Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 3-Lead TO-220 NS Package Number T03B www.national.com 18 LM1117/LM1117I 800mA Low-Dropout Linear Regulator Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 3-Lead TO-252 NS Package Number TD03B LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation Americas Email: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Francais Tel: +33 (0) 1 41 91 8790 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: ap.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 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. National P/N LM1117 - 800mA Low-Dropout Linear Regulator See A/D Converters Products Products > Analog - Regulators > Linear Regulators - Low Dropout Voltage > Positive Voltage - Adjustable > LM1117 LM1117 Product Folder 800mA Low-Dropout Linear Regulator See Also: LMS8117A - 1A OUTPUT CURRENT Generic P/N 1117 General Description Features Package & Models Datasheet Parametric Table Samples & Pricing Design Tools Parametric Table Multiple Output Capability No Dropout Voltage, typ (Volt) 1.20 On/Off Pin No Quiescent Current, typ (mA) 5 Error Flag No Secondary Ouput Voltage (Volt) - Input Voltage, min (Volt) 2.65 Secondary Output Current (Amp) - Input Voltage, max (Volt) 15 Output Voltage, min (Volt) 1.25 Output Current, max 800 mA Output Voltage, max (Volt) 13.80 Watchdog No Datasheet Title Size in Kbytes Date LM1117 LM1117I 800mA LowDropout Linear Regulator 409 Kbytes Receive via Email View Online Download 11-Dec-01 View Online Download Receive via Email If you have trouble printing or viewing PDF file(s), see Printing Problems. Package Availability, Models, Samples & Pricing Part Number Package Status Type Pins MSL LM1117MP-1.8 SOT223 4 MSL LM1117MP-2.5 SOT223 4 MSL Budgetary Samples & Pricing Electronic Orders SPICE IBIS Qty $US each Models N/A N/A Full production N/A N/A Buy Now $0.2200 reel of 1000 2T N12A 1K+ $0.2200 reel of 1000 2T N13A Samples Buy Now Package Marking 1K+ Samples Full production Std Pack Size file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM1117.html (1 of 6) [Aug-09-2002 11:37:57 AM] National P/N LM1117 - 800mA Low-Dropout Linear Regulator SOT223 4 LM1117MP-3.3 SOT223 4 MSL LM1117MP-5.0 SOT223 4 MSL LM1117MP-ADJ SOT223 4 MSL LM1117MPX-1.8 SOT223 4 LM1117MPX-2.5 SOT223 LM1117MPX-2.85 LM1117MP-2.85 MSL 1K+ $0.2200 reel of 1000 2T N04A 1K+ $0.2200 reel of 1000 2T N05A 1K+ $0.2200 reel of 1000 2T N06A 1K+ $0.2200 reel of 1000 2T N03A Samples Full production N/A Full production N/A N/A Full production N/A N/A N/A Buy Now Samples Buy Now Samples Buy Now Samples Full production N/A N/A MSL Full production N/A N/A 1K+ $0.2200 reel of 2000 2T N12A 4 MSL Full production N/A N/A 1K+ $0.2200 reel of 2000 2T N13A SOT223 4 MSL Full production N/A N/A 1K+ $0.2200 reel of 2000 2T N04A LM1117MPX-3.3 SOT223 4 MSL Full production N/A N/A 1K+ $0.2200 reel of 2000 2T N05A LM1117MPX-5.0 SOT223 4 MSL Full production N/A N/A 1K+ $0.2200 reel of 2000 2T N06A LM1117MPX-ADJ SOT223 4 MSL Full production N/A N/A Buy Now 1K+ $0.2200 reel of 2000 2T N03A LM1117IMP-3.3 SOT223 4 MSL Full production N/A N/A Samples 1K+ $0.3600 reel of 1000 2T N05B LM1117IMP-5.0 SOT223 4 MSL Full production N/A N/A Samples 1K+ $0.3600 reel of 1000 2T N06B LM1117IMP-ADJ SOT223 4 MSL Full production N/A N/A Samples 1K+ $0.3600 reel of 1000 2T N03B LM1117IMPX-3.3 SOT223 4 MSL Full production N/A N/A 1K+ $0.3600 reel of 2000 2T N05B LM1117IMPX-5.0 SOT223 4 MSL Full production N/A N/A 1K+ $0.3600 reel of 2000 2T N06B LM1117IMPX-ADJ SOT223 4 MSL Full production N/A N/A 1K+ $0.3600 reel of 2000 2T N03B TO 220 3 MSL Full production N/A N/A 1K+ $0.3700 rail of 45 [logo]UZ2T LM1117T 2.85 LM1117T-2.85 Buy Now Buy Now Buy Now Buy Now 24 Hour Samples Buy Now file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM1117.html (2 of 6) [Aug-09-2002 11:37:57 AM] National P/N LM1117 - 800mA Low-Dropout Linear Regulator N/A 24 Hour N/A Samples Buy Now 1K+ $0.3700 rail of 45 [logo]UZ2T LM1117T 3.3 1K+ $0.3700 rail of 45 [logo]UZ2T LM1117T 5.0 3 MSL Full production LM1117T-5.0 TO 220 3 MSL Full production N/A 24 Hour N/A Samples Buy Now LM1117T-ADJ TO 220 3 MSL Full production N/A N/A 24 Hour Samples Buy Now 1K+ $0.3700 rail of 45 [logo]UZ2T LM1117T ADJ LM1117DT-1.8 TO 252 3 MSL Full production N/A N/A Samples 1K+ $0.3700 rail of 75 [logo]UZ2T LM1117 DT-1.8 LM1117DT-2.5 TO 252 3 MSL Full production N/A 24 Hour N/A Samples Buy Now 1K+ $0.3700 rail of 75 [logo]UZ2T LM1117 DT-2.5 LM1117DT-2.85 TO 252 3 MSL Full production N/A N/A 24 Hour Samples Buy Now 1K+ $0.3700 rail of 75 [logo]UZ2T LM1117 DT-2.85 LM1117DT-3.3 TO 252 3 MSL Full production N/A N/A 24 Hour Samples Buy Now 1K+ $0.3700 rail of 75 [logo]UZ2T LM1117 DT-3.3 LM1117DT-5.0 TO 252 3 MSL Full production N/A 24 Hour N/A Samples Buy Now 1K+ $0.3700 rail of 75 [logo]UZ2T LM1117 DT-5.0 LM1117DT-ADJ TO 252 3 MSL Full production N/A N/A 24 Hour Samples Buy Now 1K+ $0.3700 rail of 75 [logo]UZ2T LM1117 DT-ADJ LM1117IDT-3.3 TO 252 3 MSL Full production N/A N/A 1K+ $0.3820 rail of 75 [logo]UZ2T LM1117 IDT-3.3 LM1117IDT-5.0 TO 252 3 MSL Full production N/A N/A 1K+ $0.3820 rail of 75 [logo]UZ2T LM1117 IDT-5.0 LM1117IDT-ADJ TO 252 3 MSL Full production N/A N/A 1K+ $0.3820 rail of 75 [logo]UZ2T LM1117 IDT-ADJ LM1117DTX-2.5 TO 252 3 MSL Full production N/A N/A 1K+ $0.3700 reel of 2500 [logo]UZ2T LM1117 DT-2.5 LM1117DTX-2.85 TO 252 3 MSL Full production N/A N/A 1K+ $0.3700 reel of 2500 [logo]UZ2T LM1117 DT-2.85 LM1117DTX-3.3 TO 252 3 MSL Full production N/A N/A 1K+ $0.3700 reel of 2500 [logo]UZ2T LM1117 DT-3.3 LM1117T-3.3 TO 220 Samples Buy Now Samples Samples Buy Now Buy Now file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM1117.html (3 of 6) [Aug-09-2002 11:37:57 AM] National P/N LM1117 - 800mA Low-Dropout Linear Regulator 1K+ $0.3700 reel of 2500 [logo]UZ2T LM1117 DT-5.0 1K+ $0.3700 reel of 2500 [logo]UZ2T LM1117 DT-ADJ N/A 1K+ $0.3820 reel of 2500 [logo]UZ2T LM1117 IDT-3.3 N/A N/A 1K+ $0.3820 reel of 2500 [logo]UZ2T LM1117 IDT-5.0 Full production N/A N/A 1K+ $0.3820 reel of 2500 [logo]UZ2T LM1117 IDT-ADJ Full production N/A N/A 1K+ $0.4100 rail of 45 [logo]UZ2T LM1117S 2.85 MSL Full production N/A N/A 1K+ $0.4100 rail of 45 [logo]UZ2T LM1117S 3.3 MSL Full production N/A N/A 1K+ $0.4100 rail of 45 [logo]UZ2T LM1117S 5.0 Full production N/A 1K+ $0.4100 rail of 45 [logo]UZ2T LM1117S ADJ MSL Full production N/A N/A 1K+ $0.4100 reel of 500 [logo]UZ2T LM1117S 2.85 3 MSL Full production N/A N/A 1K+ $0.4100 reel of 500 [logo]UZ2T LM1117S 5.0 3 MSL Full production N/A N/A 1K+ $0.4100 reel of 500 [logo]UZ2T LM1117S ADJ LM1117DTX-5.0 TO 252 3 MSL Full production N/A N/A LM1117DTX-ADJ TO 252 3 MSL Full production N/A N/A LM1117IDTX-3.3 TO 252 3 MSL Full production N/A LM1117IDTX-5.0 TO 252 3 MSL Full production LM1117IDTX-ADJ TO 252 3 MSL LM1117S-2.85 TO 263 3 MSL LM1117S-3.3 TO 263 3 LM1117S-5.0 TO 263 3 TO 263 3 LM1117SX-2.85 TO 263 3 LM1117SX-5.0 TO 263 LM1117SX-ADJ TO 263 LM1117S-ADJ MSL Buy Now Buy Now Buy Now Samples Buy Now Samples Samples Buy Now Samples N/A Buy Now LM1117-1.8 MDC Die Full production N/A N/A Samples tray of N/A - LM1117-2.5 MDC Die Full production N/A N/A Samples tray of N/A - LM1117-2.85 MDC Die Full production N/A N/A Samples tray of N/A - LM1117-3.3 MDC Die Full production N/A N/A Samples tray of N/A - LM1117-5.0 MDC Die Full production N/A N/A Samples tray of N/A - file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM1117.html (4 of 6) [Aug-09-2002 11:37:57 AM] National P/N LM1117 - 800mA Low-Dropout Linear Regulator Die Full production Wafer Full production Wafer Full production Wafer Full production Wafer Full production Wafer Full production Wafer Full production LM1117-ADJ MDC LM1117-1.8 MWC LM1117-2.5 MWC LM1117-2.85 MWC LM1117-3.3 MWC LM1117-5.0 MWC LM1117-ADJ MWC N/A N/A N/A N/A N/A N/A N/A tray of N/A - N/A wafer jar of N/A - N/A wafer jar of N/A - N/A wafer jar of N/A - N/A wafer jar of N/A - N/A wafer jar of N/A - N/A wafer jar of N/A - N/A Samples 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 SOT-223, TO-220, and TO-252 D-PAK packages. A minimum of 10F tantalum capacitor is required at the output to improve the transient response and stability. Features file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM1117.html (5 of 6) [Aug-09-2002 11:37:57 AM] National P/N LM1117 - 800mA Low-Dropout Linear Regulator Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable Versions Space Saving SOT-223 Package Current Limiting and Thermal Protection Output Current 800mA Line Regulation 0.2% (Max) Load Regulation 0.4% (Max) Temperature Range LM1117 LM1117I 0C to 125C -40C to 125C Applications 2.85V Model for SCSI-2 Active Termination Post Regulator for Switching DC/DC Converter High Efficiency Linear Regulators Battery Charger Battery Powered Instrumentation Design Tools Title Size in Kbytes Date LM1117 Qualification Package 1211 Kbytes Receive via Email View Online Download 14-Sep-1999 View Online Download Receive via Email If you have trouble printing or viewing PDF file(s), see Printing Problems. [Information as of 5-Aug-2002] Search Design Purchasing Quality Company Home About Languages . Website Guide . About "Cookies" . National is QS 9000 Certified . Privacy/Security Statement . Contact Us . Site Terms & Conditions of Use . Copyright 2002 (c) National Semiconductor Corporation . My Preferences . Feedback file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM1117.html (6 of 6) [Aug-09-2002 11:37:57 AM]