CYStech Electronics Corp. Spec. No. : C540J3 Issued Date : 2003.06.25 Revised Date : Page No. : 1/4 3A Low Dropout Positive Voltage Regulator PL1085-XXXJ3 Features Dropout Voltage 1.3V at 3A Output Current. Fast Transient Response. Extremely Tight Line and Load Regulation. Current Limiting and Thermal Protection. Adjustable Output Voltage or Fixed 1.5V, 1.8V, 2.5V, 2.85, 3.0V, 3.3V, 3.5V, 5.0V. Standard 3-Pin Power Packages. TO-252 Description The PL1085-XXXJ3 is a low dropout three terminal regulator with 3A output current capability. The output voltage is adjustable with the use of a resistor divider or fixed 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, 3.5V and 5.0V. Dropout voltage is guaranteed to be at maximum of 1.3V with the maximum output current. Its low dropout voltage and fast transient response make it ideal for low voltage microprocessor applications. Current limit and thermal protection provide protection against any overload condition that would create excessive junction temperatures. Applications Mother Board I/O Power Supplies. Microprocessor Power Supplies. High Current Regulator. Post Regulator for Switching Supply. Typical Application Circuit Vout=3.3V Vin=5V ADJ VREF C1 10μF R1 125Ω 1% C2 10μF R2 205Ω 1% VREF=VOUT-VADJ=1.25V(typ) VOUT=VREF(1+R1/R2)+IADJ ×R2 IADJ=55µA(typ.) (1)C1 needed if device is far away from filter capacitors. (2)C2 required for stability. Adjustable Voltage Regulator Vout=3.3V Vin=5V C2 10μF C1 10μF GND Fixed Voltage Regulator PL1085J3 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C540J3 Issued Date : 2003.06.25 Revised Date : Page No. : 2/4 Ordering Information Device Output Voltage Device Output Voltage PL1085-AdjJ3 Adjustable PL1085-3.0J3 3.0V PL1085-1.5J3 1.5V PL1085-3.3J3 3.3V PL1085-1.8J3 1.8V PL1085-3.5J3 3.5V PL1085-2.5J3 2.5V PL1085-5.0J3 5.0V PL1085-2.85J3 2.85V Absolute Maximum Ratings VIN pin to ADJ/GND pin ……………………………………………………………………………………………….7V Operating Junction Temperature Range ………………………………………………………………………0°C~ 125°C Storage Temperature Range………………………………………………………………………………..- 65°C ~ 150°C Thermal Resistance Junction to Case …………………………………………………………………………….12.5°C /W Thermal Resistance Junction to Ambient (Assume no ambient airflow, no heatsink) ………………………….. 100°C /W Lead Temperature (Soldering) 10 sec. ……………………………………………………………………………….260°C Electrical Characteristics (Vin=5V, Io=10mA,Tj=25℃,unless otherwise noted) Symbol VREF Parameter Reference Voltage Vo Output Voltage ∆Vo Line Regulation ∆Vo Is IAdj Ts IL VN Load Regulation Current Limit Adjust Pin Current Adjust Pin Current Change Temperature Stability Minimum Load Current RMS Output Noise(% of Vout) RR Ripple Rejection Ratio VD Dropout Voltage ∆IAdj PL1085J3 Conditions Min Typ Max Units 1.238 1.48 1.78 2.47 2.82 2.97 3.26 3.46 4.95 1.250 1.50 1.80 2.50 2.85 3.00 3.30 3.50 5.00 1.262 1.52 1.82 2.53 2.88 3.03 3.34 3.54 5.05 V - 0.015 0.2 % 2.65V≤Vin≤7V 3 - 55 0.6 90 % A μA 2.65V≤Vin≤7V, 0°C≤Tj≤125°C - 0.2 5 μA Io=0.5A, 0°C≤Tj≤125°C 0°C≤Tj≤125°C 10Hz≤f≤10KHz,Tj=25℃ Vin-Vout=3V, f=120Hz, Cout=25μF - 0.5 5 0.003 10 - % mA % 60 72 - dB - 1.2 1.3 V Tj=25°C PL1085-1.5 PL1085-1.8 PL1085-2.5 PL1085-2.85 PL1085-3.0 PL1085-3.3 PL1085-3.5 PL1085-5.0 Adj : 2.65V≤Vin≤7V,Tj=25℃ Fix : 1.4+Vout≤Vin≤7V 10mA≤Io≤3A,Tj=25℃ Vin-Vout=1.5V ∆Vout , ∆VREF=1%, 10mA≤Io≤3A 0°C≤Tj≤125°C V CYStek Product Specification CYStech Electronics Corp. Spec. No. : C540J3 Issued Date : 2003.06.25 Revised Date : Page No. : 3/4 Block Diagram VIN Current Amp. VREF 1.25V Thermal Limit Current Limit VOUT 55μA For fixed voltage device ADJ PL1085J3 GND CYStek Product Specification CYStech Electronics Corp. Spec. No. : C540J3 Issued Date : 2003.06.25 Revised Date : Page No. : 4/4 TO-252 Dimension C A Marking: D B 1085-XXX G F L 3 H E 2 K Style: Pin 1.Adj(GND) 2.Vout(TAB) 3.Vin I 1 3-Lead TO-252 Plastic Surface Mount Package CYStek Package Code: J3 J *: Typical Inches Min. Max. 0.0177 0.0217 0.0650 0.0768 0.0354 0.0591 0.0177 0.0236 0.2520 0.2677 0.2125 0.2283 DIM A B C D E F Millimeters Min. Max. 0.45 0.55 1.65 1.95 0.90 1.50 0.45 0.60 6.40 6.80 5.40 5.80 DIM G H I J K L Inches Min. Max. 0.0866 0.1102 *0.0906 0.0354 0.0315 0.2047 0.2165 0.0551 0.0630 Millimeters Min. Max. 2.20 2.80 *2.30 0.90 0.80 5.20 5.50 1.40 1.60 Notes: 1.Controlling dimension: millimeters. 2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material. 3.If there is any question with packing specification or packing method, please contact your local CYStek sales office. Material: • Lead: 42 Alloy; solder plating • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek. • CYStek reserves the right to make changes to its products without notice. • CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. • CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. PL1085J3 CYStek Product Specification