Liteon Semiconductor Corporation LSP1117 1A Low Dropout Linear Regulator GENERAL DESCRIPTION FEATURES The LSP1117 is a series of low dropout three-terminal regulators with a dropout of 1.4V at 1A output current. The LSP1117 series provides current limiting and thermal shutdown. Its circuit includes a trimmed bandgap reference to assure output voltage accuracy to be within 2% for 1.2V, 1.5V, 1.8V, 2.5V, 3.3.V, 5.0V and adjustable versions. Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal shutdown provides protection against any combination of overload and ambient temperature that would create excessive junction temperature. The LSP1117 has an adjustable version that can provide the output voltage from 1.2V to 12V with only two external resistors. The LSP1117 series is available in the industry standard TO252-3L and SOT223 power packages. 1.4V maximum dropout at full load current Fast transient response Output current limiting Built-in thermal shutdown Good noise rejection Low ESR Ceramic Capacitor(MLCC) Required for Stability APPLICATIONS PC Motherboard LCD Monitor Graphic Card DVD-video player NIC/Switch Telecom Equipment ADSL Modem Printer and other Peripheral Equipment PIN CONFIGURATION (1) TO252-3L 3 2 (2) SOT223 VIN VOUT 1 ADJ/GND Metal Tab VOUT 3 VIN 2 VOUT 1 ADJ/GND Metal Tab VOUT BLOCK DIAGRAM 3 INPUT Thermal Protection + 2 OUTPUT For Adjustable Output, disconnect A1 and A2, connect B For Fixed Output,connect A1 and A2, disconnect B A1 A2 1 ADJ/GND B 1/9 Rev1.5 Liteon Semiconductor Corporation LSP1117 1A Low Dropout Linear Regulator ABSOLUTE MAXIMUM RATINGS (NOTE 1) Symbol Parameter Rating Unit VIN Input Voltage 23 V TJ Maximum Junction Temperature 150 TS Storage Temperature -65~150 TLEAD Lead Temperature (10 sec.) 300 Note 1: Stresses greater than those listed under"Absolute Maximum Ratings" may cause permanent damage to the device. These are stress rating only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS Symbol VIN TJ Parameter Input Voltage Operating Junction Temperature Range Rating 20 -20~125 Unit V ELECTRICAL CHARACTERISTICS Operating Conditions: VIN10V, TJ=25, unless otherwise specified Parameter Reference Voltage Symbol VREF LSP1117 -Adj LSP1117-1.2 LSP1117 -1.5 LSP1117 -1.8 Output Voltage VOUT LSP1117 -2.5 LSP1117 -3.3 LSP1117 -5.0 Line Regulation RegLINE Load Regulation RegLoad Dropout Voltage Current Limit VIN- VOUT ILIMT LSP1117-XXX LSP1117 -Adj LSP1117 -1.2 LSP1117 -1.5 LSP1117 -1.8 LSP1117 -2.5 LSP1117 -3.3 LSP1117 -5.0 LSP1117-XXX LSP1117-XXX Ripple Rejection LSP1117-XXX Temperature Stability LSP1117-XXX Test Condition IO=10mA, VIN-VOUT=1.5V IO=10mA,1.5VVIN-VOUT8V IO=10mA, VIN=3V IO=10mA, 3VVIN10V IO=10mA, VIN=3V IO=10mA, 3VVIN10V IO=10mA, VIN=3.3V IO=10mA, 3.3VVIN10V IO=10mA, VIN=4V IO=10mA, 4VVIN10V IO=10mA, VIN=4.8V IO=10mA, 4.8VVIN10V IO=10mA, VIN=6.5V IO=10mA, 6.5VVIN12V IO=10mA,1.5VVIN-VOUT7V IO=10mA,1.5VVIN-VOUT10V VIN= 3V, 10mA<Io<1A VIN= 3V, 10mA<Io<1A VIN= 3V, 10mA<Io<1A VIN= 3.3V, 10mA<Io<1A VIN= 4V, 10mA<Io<1A VIN= 5V, 10mA<Io<1A VIN= 6.5V, 10mA<Io<1A IOUT = 1A ,VOUT=1%VOUT VIN-VOUT=3V F=120Hz,COUT=25uF Tantalum, VIN-VOUT=3V IO=10mA 2/9 Min. 1.225 1.225 1.188 1.176 1.485 1.470 1.782 1.764 2.475 2.450 3.267 3.235 4.950 4.900 Typ. 1.250 1.250 1.2 1.2 1.5 1.5 1.8 1.8 2.5 2.5 3.3 3.3 5.0 5.0 0.1 0.1 10 12 15 20 26 40 1.3 Max. 1.275 1.275 1.212 1.224 1.515 1.530 1.818 1.836 2.525 2.550 3.333 3.365 5.050 5.100 0.3 0.5 1 12 15 18 25 33 50 1.4 60 70 1.1 0.5 Unit V V V V V V V % % mV mV mV mV mV mV V A dB % Rev1.5 Liteon Semiconductor Corporation LSP1117 1A Low Dropout Linear Regulator ELECTRICAL CHARACTERISTICS (CONTINUED) Operating Conditions: VIN10V, TJ=25, unless otherwise specified Parameter Adjust Pin Current Adjust Pin Current Change Symbol Test Condition IO=10mA~1A, 1.5VVIN-VOUT10V IO=10mA~1A, 1.4VVIN-VOUT10V Minimum Load Current Typ. 60 0.2 Max. 120 5 Unit A A 5 10 mA VIN=VOUT+1.25V F = 100Hz, IOUT = 1A TA=125, 1000hrs 5 60 0.3 10 70 mA dB % TA=25, 10Hzf10kHz 0.003 TO252-3L SOT223 TO252-3L SOT223 TO252-3L SOT223 Junction Temperature 1.2 0.625 55 75 10 15 150 / W / W 25 LSP1117-Adj Quiescent Current Power Ratio Ripple Rejection Long-term Stability RMS Output Noise (% of VOUT) Iq PSRR Power Dissipation Pd Thermal Resistance, Junction to Ambient Thermal Resistance, Junction to case Thermal Shutdown Thermal Shutdown Hysteresis JA JC Min. 1.5VVIN-VOUT10V % W TYPICAL APPLICATIONS VIN VOUT LSP1117 - Fixed VIN VIN VOUT VOUT ADJ GND 4.7F 4.7F VOUT LSP1117 - ADJ VIN 4.7F R1 4.7F R2 The LSP1117 keeps a constant 1.25V between the output pin and the adjust pin. By placing a resistor R1 across these two pins a constant current flows through R1, adding to the Iadj current and into the R2 resistor producing a voltage equal to the (1.25/R1)*R2+Iadj*R2 which will be added to the 1.25V to set the output voltage. LSP1117-ADJ VIN VIN ADJ C1 VOUT VOUT VREF R1 C2 I ADJ= 60uA R2 VOUT = VREF x 1 + + I ADJ x R 2 R1 VREF = 1.25V R2 3/9 Rev1.5 Liteon Semiconductor Corporation LSP1117 1A Low Dropout Linear Regulator This is summarized in the above equation. Since the minimum load current requirement of the LSP1117 is 10mA, R1 is typically selected to be 121 resistor so that it automatically satisfies the minimum current requirement. Notice that since Iadj is typically in the range of 60uA it only adds a small error to the output voltage and should only be considered when a very precise output voltage setting is required. For example, in a typical 3.3V application where R1=121 and R2=200 the error due to Iadj is only 0.3% of the nominal set point. The C1, C2 capacitor are 4.7uF (Low ESR Ceramic, MLCC), and its ESR should be larger than 15m. LSP1117-ADJ VIN VIN ADJ C1 VOUT VOUT VREF R1 C2 R2 VOUT V REF x 1 + R1 V When REF = 10mA >> I ADJ R1 R2 4/9 Rev1.5 Liteon Semiconductor Corporation LSP1117 1A Low Dropout Linear Regulator TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage (V) 1.2 1.1 1.0 Dropout Voltage vs Output Current TA=0 TA=25 0.9 0.8 TA=125 0.7 0.6 0.5 0.2 0.4 0.6 0.8 Output Current (A) 1.0 Reference Voltage vs Junction Temperature 1.280 Reference Voltage (V) 1.275 1.270 1.265 1.260 1.255 1.250 1.245 1.240 1.235 -50 -25 0 25 50 75 100 125 Junction Temperature () Adjust Pin Current (A) Minimum Load Current (mA) 5 4 3 2 1 0 Adjust Pin Current vs Junction Tem perature 90 Minimum Load Current vs Junction Temperature -50 -25 0 25 50 75 100 Junction Temperature () 80 70 60 50 40 30 20 10 0 125 5/9 -50 -25 0 25 50 75 100 Junction Tem perature ( ) 125 Rev1.5 Liteon Semiconductor Corporation LSP1117 1A Low Dropout Linear Regulator TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED) Short-Circuit Current vs Junction Temperature 10.0 Maximum Power Dissipation 1.8 7.5 Power (W) Short-Circuit Current (A) 2.0 1.6 1.4 2.5 1.2 1.0 -50 SOT223 5.0 -25 0 25 50 75 100 Junction Temperature () 125 Line Transient Response 0.0 25 50 75 100 Case Temperature ( 125 Load Transient Response Ripple Rejection vs Frequency Ripple Rejection (dB) 70 60 50 40 30 20 10 100 10k 1k Frequency (Hz) 100k 6/9 Rev1.5 Liteon Semiconductor Corporation LSP1117 1A Low Dropout Linear Regulator ORDERING INFORMATION Device Package Code Package LSP1117EXXAG LSP1117DXXAG E D SOT223-3L TO252-3L Tape & Reel Part Number Quantity Suffix 2500 A 2500 A Temperature G : -20C~125C G : -20C~125C MARKING INFORMATION (1) TO252-3L (2) SOT223 7/9 Rev1.5 Liteon Semiconductor Corporation LSP1117 1A Low Dropout Linear Regulator PACKAGE INFORMATION (1) TO252-3L E 5.6 2.0 L1 2.25 7.2 11.0 D 5.6 L2 b2 1.2 b e Land Pattern Recommendation (Unit : mm) e1 H C1 C L A SEATING PLANE SEE NOTE2 Notes: 1. JEDEC Outline:TO-252 AB 2. Mils suggested for positive contact at mounting Symbol A b b2 C C1 D E e e1 H L L1 L2 Dimensions In Millimeters Min. Nom. Max. 2.18 2.29 2.39 0.635 0.889 4.953 5.461 0.52 BSC 0.46 0.52 0.89 5.33 5.46 5.59 6.35 6.58 6.73 2.29 BSC. 4.58 BSC. 9.4 9.70 10.25 1.4 1.52 1.78 0.64 0.83 1.02 1.52 1.78 2.03 8/9 Min. 0.086 0.025. 0.195 0.018 0.210 0.250 0.37 0.055 0.025 0.060 Dimensions In Inches Nom. 0.090 0.020 BSC 0.020 0.215 0.259 0.09 BSC. 0.18 BSC. 0.382 0.06 0.033 0.070 Max. 0.094 0.035 0.215 0.035 0.220 0.265 0.41 0.07 0.040 0.080 Rev1.5 Liteon Semiconductor Corporation LSP1117 1A Low Dropout Linear Regulator (2) SOT223 D 3.3 6.4 K 1.6 E H 1.6 B1 1.2 e 2.3 e1 Land Pattern Recommendation (Unit :mm) A A1 L B Seating Plane C Symbol A A1 B B1 C D E e e1 H L K Dimensions In Millimeters Nom. Max. 1.65 1.80 0.06 0.1 0.76 0.84 3.0 3.1 (Ref.) 0.30 0.35 6.50 6.70 3.50 3.70 2.3Basic 4.6Basic 6.70 7.00 7.30 0.75 1.50 1.75 2.00 0 5 10 Min. 1.50 0.02 0.66 2.90 0.23 6.30 3.30 9/9 Min. 0.059 0.001 0.026 0.114 0.009 0.248 0.130 0.264 0.03 0.059 0 Dimensions In Inches Nom. Max. 0.065 0.071 0.002 0.004 0.03 0.033 0.118 0.122(Ref.) 0.012 0.014 0.256 0.264 0.138 0.146 0.091Basic 0.181Basic 0.276 0.287 0.069 5 0.079 10 Rev1.5