SA1117B 800 mA LDO VOLTAGE REGULATOR DESCRIPTION The SA1117B is a positive low voltage dropout regulator; voltage dropout is only 1.2V at 800mA. SA1117B provides two versions: fixed and adjustable versions. VOUT has a tolerance of less than 1.5% for fixed versions 1.5V, SOT-223-3L 1.8V, 2.5V, 3.3V, 5.0V and adjustable version or 2% output accuracy for fixed version 1.2V. The SA1117B offers some key features include thermal shutdown and current limiting. It is suitable for all electronic products. FEATURES TO-252-2L * 1.5% output accuracy for fixed versions 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and adjustable version * 2% output accuracy for fixed version 1.2V * Low Dropout Voltage: 1.2V at 800mA output current * Current Limiting * Thermal Shutdown * Temperature Range: -40°C to 125°C APPLICATIONS * Laptop, Palmtop, and Notebook Computers * Battery Charger * SCSI-II Active Terminator * Cellular Phone * Cordless Telephones * Battery Powered Systems * Portable Instrumentation * SMPS Post-Regulator ORDERING INFORMATION (Temperature range: -40°C ~125°C) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.0 2008.08.12 Page 1 of 8 SA1117B Part No. Package Marking Material Packing Type SA1117BH-ADJTR SA1117BH-ADJ Pb free Tape & Reel SA1117BH-1.2TR SA1117BH-1.2 Pb free Tape & Reel SA1117BH-1.5TR SA1117BH-1.5 Pb free Tape & Reel SA1117BH-1.8 Pb free Tape & Reel SA1117BH-2.5TR SA1117BH-2.5 Pb free Tape & Reel SA1117BH-3.3TR SA1117BH-3.3 Pb free Tape & Reel SA1117BH-5.0TR SA1117BH-5.0 Pb free Tape & Reel SA1117BD-ADJ SA1117BD-ADJ Pb free Tube SA1117BD-ADJTR SA1117BD-ADJ Pb free Tape & Reel SA1117BD-1.2 SA1117BD-1.2 Pb free Tube SA1117BD-1.2 TR SA1117BD-1.2 Pb free Tape & Reel SA1117BD-1.5 SA1117BD-1.5 Pb free Tube SA1117BD-1.5TR SA1117BD-1.5 Pb free Tape & Reel SA1117BD-1.8 Pb free Tube SA1117BD-1.8 Pb free Tape & Reel SA1117BD-2.5 SA1117BD-2.5 Pb free Tube SA1117BD-2.5TR SA1117BD-2.5 Pb free Tape & Reel SA1117BD-3.3 SA1117BD-3.3 Pb free Tube SA1117BD-3.3TR SA1117BD-3.3 Pb free Tape & Reel SA1117BD-5.0 SA1117BD-5.0 Pb free Tube SA1117BD-5.0TR SA1117BD-5.0 Pb free Tape & Reel SA1117BH-1.8TR SA1117BD-1.8 SA1117BD-1.8TR SOT-223-3L TO-252-2L BLOCK DIAGRAM HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.0 2008.08.12 Page 2 of 8 SA1117B ABOSOLUTE MAXIMUM RATINGS Characteristics Symbol Ratings Unit VIN 20 V TLead 260 °C TJ 150 °C Storage Temperature Range Tstg -65 ~ +150 V Power Dissipation PD Internally Limited (Note1) mW ESD 2000 V Input Supply Voltage Lead Temperature (Soldering, 5 seconds) Operating Junction Temperature Range ESD Tolerance (Minimum) Note1: The maximum allowable power dissipation is a function of maximum operating junction temperature, TJ (max), the junction to ambient thermal resistance, θJA, and the ambient temperature Tamb. The maximum allowable power dissipation at any ambient temperature is given: PD (max) = (TJ (max) - Tamb)/θJA, exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown. The junction to ambient thermal resistance, θJA of some packages may be different, The value of θJA depends on mounting technique. RECOMMENDED OPERATING CONDITIONS Characteristics Symbol Ratings Unit Input voltage VIN 15 V Operating Junction Temperature Range TJ -40 ~ +125 °C ELECTRICAL CHARACTERISTICS(Tamb=25°C, unless otherwise specified. Limits appearing in Boldface type apply over the entire junction temperature range for operation, -40°C to 125°C. ) Characteristics Symbol Conditions Min. Typ. Max. Unit V SA1117B-ADJ, Reference Voltage VREF IOUT=10mA, VIN-VOUT=2V, TJ=25°C 1.231 1.250 1.268 10mA≤IOUT≤1A, 1.4V≤VIN-VOUT≤10V 1.225 1.250 1.275 1.176 1.2 1.224 1.152 1.2 1.248 1.477 1.500 1.522 1.470 1.500 1.530 IOUT=10mA, VIN=3.8V, TJ=25°C , 1.773 1.800 1.827 0≤IOUT≤1A, 3.2V≤VIN≤10V 1.746 1.800 1.854 IOUT=10mA, VIN=4.5V,TJ=25°C , 2.462 2.500 2.538 0≤IOUT≤1A, 3.9V≤VIN ≤10V 2.450 2.500 2.550 IOUT=10mA, VIN=5V,TJ=25°C , 3.250 3.300 3.349 0≤IOUT≤1A, 4.75V≤VIN≤10V 3.235 3.300 3.365 SA1117B-1.2, IOUT=10mΑ, VIN=3.2V ,TJ=25°C 10mA≤IOUT≤1A, 3.0V≤VIN≤10V V SA1117B-1.5, IOUT=10mΑ, VIN=3.5V ,TJ=25°C 10mA≤IOUT≤1A, 3.0V≤VIN≤10V V SA1117B-1.8, Output Voltage VOUT V SA1117B -2.5, V SA1117B-3.3, HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.0 V 2008.08.12 Page 3 of 8 SA1117B Characteristics Symbol Conditions Min. Typ. Max. Unit IOUT=10mA, VIN=7V, TJ=25°C , 4.925 5.000 5.075 V 0≤ IOUT≤1A, 6.5V≤VIN≤12V 4.900 5.000 5.10 SA1117B-5.0, Output Voltage VOUT Output Voltage TSOUT Temperature Stability Line Regulation Rline Load Regulation Rload Dropout Voltage Vdrop Quiescent Current Iq Ripple Rejection PSRR Adjust pin Current 0.3 VINMIN ≤VIN≤ 12V,VOUT=Fixed/Adj, 3 IOUT=10mA 10mA≤IOUT≤ 800mA,VOUT=Fixed/Adj Thermal shutdown TSD Current limitting Ilimit mV mV 6 12 1.00 1.20 IOUT=500mA 1.05 1.25 IOUT=800mA 1.20 1.30 5 10 4.25V≤VIN≤ 6.5V fRIPPLE=120Hz, (VIN-VOUT)=3V, VRIPPLE=1VPP 60 0≤ IOUT≤800mA,1.4V ≤VIN-VOUT≤10V Change 7 IOUT=100mA Iadj Adjust pin Current % 75 Temperature Stabiliy Long Term Stability TAMB=125°C, 1000Hrs RMS Output Noise % of VOUT, 10Hz≤f≤10kHz mA dB 60 120 µA 0.2 5 µA 150 0.9 V °C 0.5 A % 0. 3 % 0.003 % 1.1 1.2 PIN CONFIGURATION PIN DESCRIPTION Pin No. Pin name I/O Functions 1 GND/ADJ --/O 2 VOUT O Output voltage 3 VIN I Input supply voltage Ground/ADJ HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.0 2008.08.12 Page 4 of 8 SA1117B FUNCTION DESCRIPTION The SA1117B is a LDO regulator, it’ s pass transistor is made up of a single NPN transistor being driven by a PNP. The dropout voltage is defined as: VDROP = VBE+ VSAT. The SA1117B series of fixed and adjustable regulators are easy to use. Output voltages are 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5.0V.On-chip thermal shut down provides protection against any combination of overload and ambient temperature that would create excessive junction temperature. The SA1117B requires an output capacitor for device stability. Its value of 22µF tantalum covers all cases of bypassing the adjustment terminal. Without bypassing the adjustment terminal smaller capacitors can be used with equally good results which depend upon the application circuit. In general, linear regulator stability decreases with higher output currents. TYPICAL APPLICATION CIRCUIT Figure 1. Typical Fixed Output Voltage Figure 2. Typical Adjustable Output Voltage Note: The circuit and parameters are reference only, please set the parameters of the real application circuit based on the real test. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.0 2008.08.12 Page 5 of 8 SA1117B TYPICAL CHARACTERISTICS CURVES Temperature Stability Adjust Pin Current Adjust pin current ( A) 100 90 80 70 60 50 40 30 20 10 0 -50 -25 0 25 50 75 100 125 150 Temperature( C) VOUT=5 V Line Transient Response Load current (A) Output Voltage deviation (mV) Input voltage deviation(V) Output voltage deviation(V) VOUT=5 V Load Transient Response Ripple Rejection VS Current HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.0 2008.08.12 Page 6 of 8 SA1117B PACKAGE OUTLINE TO-252-2L Unit: mm TO-252-2L Unit: mm HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.0 2008.08.12 Page 7 of 8 SA1117B PACKAGE OUTLINE SOT-223-3L Unit: mm Disclaimer: • Silan reserves the right to make changes to the information herein for the improvement of the design and performance without further notice! • All semiconductor products malfunction or fail with some probability under special conditions. When using Silan 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 Silan products could cause loss of body injury or damage to property. • Silan will supply the best possible product for customers! HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.0 2008.08.12 Page 8 of 8