AMS1085 3A LDO VOLTAGE REGULATOR DESCRIPTION The AMS1085 is a positive low voltage dropout regulator, voltage dropout is only 1.18V at 3A. AMS1085 has two versions: the fixed version and the adjustable version. VOUT has a tolerance of less than 1% for fixed versions TO-263-2L TO-220-3L TO-263-3L TO-252-2L 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and adjustable version. The AMS1085 integrates overheating protection and current limit circuits. It is an suitable for all electronic products. FEATURES * 1% accuracy for fixed output VOUT while the voltage is 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and the adjustable output VOUT * Low Dropout Voltage: 1.18V at 3A output current APPLICATIONS * High Efficiency Linear Regulators * Current Limiting: 4.5A * SMPS Post-Regulator *Load regulation : 0.1% typical (adjustable version) * Battery Charger *Line regulation : 0.015% typical (adjustable version) * Microprocessor Supply * Temperature Range: 0°C to 125°C *Desktop PCs, RISC and embedded processors'supply ORDERING INFORMATION (Temperature range: 0°C ~125°C) AMS1085 TR: Tape & Reel Blank: Tube Package Blank: Pb free CD: TO-252-2L : Adjustable Output 1.5: Fixed Output 1.5V CM: TO-263-3L CT: TO-220-3L 1.8: Fixed Output 1.8V 2.5: Fixed Output 2.5V 3.3: Fixed Output 3.3V 5.0: Fixed Output 5.0V 1 Advanced Monolithic Systems http://www.ams-semitech.com AMS1085 PART NO Marking Package Material Packing Type AMS1085D-ADJ AMS1085CD Pb free Tube AMS1085D-ADJTR AMS1085CD Pb free Tape & Reel AMS1085D-1.5 AMS1085CD-1.5 Pb free Tube AMS1085D-1.5TR AMS1085CD-1.5 Pb free Tape & Reel AMS1085D-1.8 AMS1085CD-1.8 Pb free Tube AMS1085CD-1.8 Pb free Tape & Reel AMS1085CD-2.5 Pb free Tube AMS1085D-2.5TR AMS1085CD-2.5 Pb free Tape & Reel AMS1085D-3.3 AMS1085CD-3.3 Pb free Tube AMS1085D-3.3TR AMS1085CD-3.3 Pb free Tape & Reel AMS1085D-5.0 AMS1085CD-5.0 Pb free Tube AMS1085D-5.0TR AMS1085CD-5.0 Pb free Tape & Reel AMS1085S-ADJ AMS1085CM Pb free Tube AMS1085S-ADJTR AMS1085CM Pb free Tape & Reel AMS1085S-1.5 AMS1085CM-1.5 Pb free Tube AMS1085S-1.5TR AMS1085CM-1.5 Pb free Tape & Reel AMS1085S-1.8 AMS1085CM-1.8 Pb free Tube AMS1085CM-1.8 Pb free Tape & Reel AMS1085CM-2.5 Pb free Tube AMS1085S-2.5TR AMS1085CM-2.5 Pb free Tape & Reel AMS1085S-3.3 AMS1085CM-3.3 Pb free Tube AMS1085S-3.3TR AMS1085CMS-3.3 Pb free Tape & Reel AMS1085S-5.0 AMS1085CM-5.0 Pb free Tube AMS1085S-5.0TR AMS1085CM-5.0 Pb free Tape & Reel AMS1085T-ADJ AMS1085CT Pb free Tube AMS1085T-1.5 AMS1085CT-1.5 Pb free Tube AMS1085CT-1.8 Pb free Tube AMS1085CT-2.5 Pb free Tube AMS1085T-3.3 AMS1085CT-3.3 Pb free Tube AMS1085T-5.0 AMS1085CT-5.0 Pb free Tube AMS1085S2-ADJ AMS1085CM Pb free Tube AMS1085S2-ADJTR AMS1085CM Pb free Tape & Reel AMS1085S2-1.5 AMS1085CM-1.5 Pb free Tube AMS1085CM-1.5 Pb free Tape & Reel AMS1085S2-1.8 AMS1085CM-1.8 Pb free Tube AMS1085S2-1.8TR AMS1085CM-1.8 Pb free Tape & Reel AMS1085S2-2.5 AMS1085CM-2.5 Pb free Tube AMS1085D-1.8TR AMS1085D-2.5 AMS1085S-1.8TR AMS1085S-2.5 AMS1085T-1.8 AMS1085T-2.5 AMS1085S2-1.5TR TO-252-2L TO-263-3L TO-220-3L TO-263-2L 2 Advanced Monolithic Systems http://www.ams-semitech.com AMS1085 Marking Package PART NO Material Packing Type AMS1085S2-2.5TR AMS1085CM-2.5 Pb free Tape & Reel AMS1085S2-3.3 AMS1085CM-3.3 Pb free Tube AMS1085CM-3.3 Pb free Tape & Reel AMS1085S2-5.0 AMS1085CM-5.0 Pb free Tube AMS1085S2-5.0TR AMS1085CM-5.0 Pb free Tape & Reel TO-263-2L AMS1085S2-3.3TR BLOCK DIAGRAM VIN Current limit TSD VO Band gap Fixed : F1 and F2 connect, disconnect A F1 F2 Adj : A connect, F1 and F2 disconnect A ABOSOLUTE MAXIMUM RATINGS Characteristics ADJ/GND Symbol Ratings Unit VIN 20 V TLEAD 260 °C Operating Junction Temperature Range TJ 150 °C Storage Temperature Range Power Dissipation TS -65 ~ +150 V PD Internally Limited (Note1) mW ESD 2000 V Input Supply Voltage Lead Temperature (Soldering,5 Seconds) 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 different packages may be different, and the he value of θJA depends on mounting technique. 3 Advanced Monolithic Systems http://www.ams-semitech.com AMS1085 RECOMMENDED OPERATING CONDITIONS Characteristics Ratings Symbol Input Supply Voltage Operating Junction Temperature Range Unit VIN 12 V TJ 0 ~ +125 °C ELECTRICAL CHARACTERISTICS (Tamb=25°C, unless otherwise specified. Limits appearing in Boldface type apply over the entire junction temperature range for operation, 0°C to 125°C. ) Characteristics Symbol Conditions Min. Typ. Max. Unit AMS1085-ADJ, Reference Voltage VREF IOUT=10mA, VIN-VOUT=3V, 1.238 1.250 1.262 V 10mA≤IOUT≤3A,1.5V≤VIN-VOUT≤5V 1.225 1.250 1.270 AMS1085-1.5, IOUT=10mA, VIN=4.5V, 1.485 1.5 1.515 10mA≤IOUT≤3A, 3.0V≤VIN≤6V 1.47 1.5 1.53 IOUT=10mA, VIN=4.8V, 1.782 1.8 1.818 10mA≤IOUT≤ 3A, 3.3V≤VIN≤6V 1.764 1.8 1.836 IOUT=10mA, VIN=5.5V 2.475 2.5 2.525 10mA≤IOUT≤3A, 4.0V≤VIN ≤7V 2.45 2.5 2.55 IOUT=10mA, VIN=6.3V, 3.267 3.3 3.333 10mA≤IOUT≤3A, 4.8V≤VIN≤8V 3.234 3.3 3.366 IOUT=10mA, VIN=8V, 10mA≤ 4.95 5 5.05 IOUT≤3A, 6.5V≤VIN≤10V 4.9 5 5.1 AMS1085-ADJ, 0.015 0.2 IOUT=10mA, 2.85V≤VIN≤10V 0.035 0.2 0.5 6 1 6 0.5 6 1 6 0.5 6 1 6 0.5 6 1 6 0.5 10 1 10 V AMS1085-1.8, V AMS1085-2.5, Output Voltage VOUT V AMS1085-3.3, V AMS1085-5.0, AMS1085-1.5, IOUT=10mA, 3.0V≤VIN≤10V AMS1085-1.8, Line Regulation ΔVOUT IOUT=10mA, 3.3V≤VIN≤10V AMS1085-2.5, IOUT=10mA, 4.0V≤VIN≤10V AMS1085-3.3, IOUT=10mA, 4.8V≤VIN≤10V AMS1085-5.0, IOUT=10mA, 6.5V≤VIN≤10V 4 Advanced Monolithic Systems http://www.ams-semitech.com V % mV mV mV mV mV AMS1085 Characteristics Symbol Load Regulation ΔVOUT Dropout Voltage VDROP Current Limitting ILIMIT Minimum Load Current ILOAD (MIN) Quiescent Current IQ Ripple Rejection PSRR Adjust Pin Current IADJ Adjust Pin Current Change ΔIADJ Conditions Min. Typ. Max. AMS1085-ADJ, 0mA≤IOUT≤3A, 0.1 0.3 VIN-VOUT=3V 0.2 0.4 AMS1085-1.5, 0mA≤IOUT≤3A, 3 15 VIN-VOUT=3V 7 20 AMS1085-1.8, 0mA≤ IOUT≤3A 3 15 VIN-VOUT=3V 7 20 AMS1085-2.5, 0mA≤IOUT≤3A, 3 15 VIN-VOUT=3V 7 20 AMS1085-3.3, 0mA≤IOUT≤3A, 3 15 VIN-VOUT=3V 7 20 AMS1085-5.0, 0mA≤IOUT≤3A, 5 20 VIN-VOUT=3V 10 35 IOUT=3A, ΔVREF, ΔVOUT=1% 1.18 1.3 VIN-VOUT=3V 4.5 Unit % mV mV mV mV mV V A VIN=10V (AMS1085-ADJ) 3 10 mA VIN=10V (AMS1085) 5 10 mA fRIPPLE=120Hz, COUT=25μF IOUT=3A, VIN-VOUT=3V 60 72 VIN=4.25V, IOUT=10mA 10mA≤IOUT≤3A, 1.5V≤(VIN-VOUT)≤4.5V dB 55 120 μA 0.2 5 μA Temperature Stability IOUT=10mA, VIN-VOUT=1.5V 0.5 % Long Term Stability Tamb=125°C, 1000Hrs 0.5 % RMS Output Noise(% of Vout) 10Hz≤f≤10kHz 0.003 % Thermal Resistance θJA TO-263-3L 60 TO-263-2L 60 TO-220-3L 60 TO-252-2L 100 5 Advanced Monolithic Systems http://www.ams-semitech.com °C/W AMS1085 PIN CONFIGURATION TO-252-2L TO-263-2L 1 2 TO-263-3L 1 3 2 1 2 TO-220-3L 1 3 2 3 3 PIN DESCRIPTION Functions Pin No. Pin name I/O 1 GND/ADJ --/O 2 VOUT O Output voltage 3 VIN I Input supply voltage Ground/ADJ FUNCTION DESCRIPTION The AMS1085 is a LDO regulator, its 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 AMS1085 has two versions: the fixed output version and the adjustable output version. Output voltages can be 1.5V, 1.8V, 2.5V, 3.3V, and 5.0V.On-chip thermal shut-down circuit provides protection against overload and overheating that would create excessive junction temperature. The adjustable output version requires a 22 μF or bigger tantalum capacitor at output for AMS1085 stability. The capacitor for fixed output version can be smaller and should be determined base on actual application. Generally, the stability of linear regulator stability decreases with output currents increase. 6 Advanced Monolithic Systems http://www.ams-semitech.com AMS1085 TYPICAL APPLICATION CIRCUIT AMS1085 Vin Vin Vout Vout GND 10uF 22uF Figure 1. Typical Fixed Output Voltage AMS1085-ADJ Vin Vin ADJ 10uF Vout Vout R1 22uF R2 Vout=Vref X (1+R2/R1) + Iadj X R2 Figure 2. Typical Adjustable Output Voltage Note: The above circuit and parameters are reference only, please set the parameters of the real application circuit based on the real test. 7 Advanced Monolithic Systems http://www.ams-semitech.com AMS1085 TYPICAL CHARACTERISTICS CURVES PSRR vs. Frequency Output Voltage Change vs. Temperature Stability 90 80 70 60 50 40 30 20 10 0 2.0 1.0 0 -1.0 -2.0 -50 -25 0 25 50 75 100 125 150 10 Temperature 100 Short-Circuit Current vs. Dropout Voltage 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 5 4 2 0 6 5 4 3 2 1 0 2 4 6 8 10 12 Dropout Voltage (V) 100 90 80 70 60 50 40 30 20 10 0 Vout=10V Iin=0.2A Cin=1uF Tantalum Cout=10uF Tantalum 100 Time (uS) Cadj=0 Cin=1uF Cout=10uF Tantalum Vout=10V Vin=13V PRELOAD=100mA 0 50 100 Adjust Pin Current vs. Temperature Cadj=0 0 1M Time (uS) Line Transient Response 60 40 20 0 -20 -40 -60 14 13 12 100K Load Transient Response 7 0 1K 10K Frequency (Hz) 200 -50 -25 0 25 50 75 Temperature 8 Advanced Monolithic Systems http://www.ams-semitech.com 100 125 150 AMS1085 PACKAGE OUTLINE Unit: mm TO-252-2L 6.50±0.25 2.30±0.20 5.30±0.10 5.55±0.25 3.80 REF 1.50±0.15 0.505+/-0.10 0.80±0.10 1.59±0.19 0～0.127 2.30 0.60±0.10 0.505±0.1 4.60+/-0.10 TO-220-3L 2.74±0.20 Unit: mm 4.57±0.20 10.16±0.20 1.27±0.10 8.95±0.30 12.26±0.20 Φ3.835±0.100 2.67±0.15 13.60±0.20 3.76±0.20 1.27 0.81 0.42±0.11 2.54±0.10 5.08±0.10 9 Advanced Monolithic Systems http://www.ams-semitech.com AMS1085 PACKAGE OUTLINE Unit: mm TO-263-2L 10.15+/-0.30 4.57+/-0.10 1.27+/-0.10 1.27+/-0.10 0.30~0.55 0~0.15 0.81+/-0.10 2.54TYP 4.98~5.18 TO-263-3L Unit: mm 4.57±0.10 15.25±0.20 8.70±0.20 1.27±0.10 0～0.15 2.54±0.20 5.28±0.20 1.27 0.81 2.54TYP 10.16±0.15 10 Advanced Monolithic Systems http://www.ams-semitech.com +0.15 0.38 -0.07 AMS1085 Disclaimer: • AMS reserves the right to make changes to the information herein for the improvement of the design and performance without further notice! Customers should obtain the latest relevant information before placing orders and should verify that such information is complete and current. • All semiconductor products malfunction or fail with some probability under special conditions. When using AMS 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 AMS products could cause loss of body injury or damage to property. • AMS will supply the best possible product for customers! 11 Advanced Monolithic Systems http://www.ams-semitech.com