AMC DOC. #: AMC1084_B November 2002 AMC1084 ADD MICROTECH CORP. 5A LOW DROPOUT REGULATOR DESCRIPTION FEATURES The AMC1084 is a high performance low dropout regulator rated for 5A output current with fixed 1.8V/2.5V/3.3V/5.0V and adjustable output. It is designed for use in applications requiring low dropout characteristics over the rated current range. On chip trimming adjusts the reference voltage to 1%. These features are ideal for low voltage microprocessor applications requiring a regulated 1.8V to 3.6V power supply. In addition, the AMC1084 provides the device protections including over current and thermal shutdown. Also, reverse battery protection scheme limits the reverse current when the input voltage falls below the output. ! ! # # # # # # APPLICATIONS ! ! ! ! $ Input-Output differential of typical 1.1V at 5A and low quiescent current Output current is excess of 5A Fast transient response Reverse battery protection Short circuit protection Internal thermal overload protection Available in 3L plastic TO-220 and surface mount 3L TO-263/252 packages Pin assignment identical to EZ1084, LT1084, and LT1585 series. PACKAGE PIN OUT Pentium Processor Supplies PowerPCTM Supplies Computer Add-On Cards Other Applications Requiring Lower Dropout Voltage 3.VIN 2.VOUT 1.ADJ/GND 3.VIN 2.VOUT 1.ADJ/GND 3-Pin Plastic TO-252 Surface Mount (Top View) 3-Pin Plastic TO-220 (Top View) Voltage Options: 3.VIN 2.VOUT 1.ADJ/GND AMC1084-1.8 - 1.8V Fixed AMC1084-2.5 - 2.5V Fixed AMC1084-3.3 - 3.3V Fixed AMC1084-5.0 - 5.0V Fixed AMC1084-ADJ - Adjustable 3-Pin Plastic TO-263 Surface Mount (Top View) ORDER INFORMATION TA (C) T TO-220 3-pin 0 to 70 AMC1084-X.XT 0 to 70 AMC1084-ADJT ST TO-263 3-pin AMC1084-X.XST AMC1084-ADJST Note: All surface-mount packages are available in Tape & Reel. AMC1084-X.XSTT, AMC1084-X.XSJT ). Copyright 2002, ADD Microtech Corp. SJ 1 TO-252 3-pin AMC1084-X.XSJ AMC1084-ADJSJ Append the letter "T" to part number (i.e., www.addmtek.com AMC1084 AMC DOC. #: AMC1084_B November 5A LOW DROPOUT REGULATOR 2002 TYPICAL APPLICATION VIN 3V AMC1084 -X.X VOUT 1.8V/2.5V/3.3V/5V C1 10F C2 22F AMC1084-X.X application schematic AMC1084 ADJ VIN VOUT R1 1% ADJ *C1 10F **C2 22F R2 1% VOUT = VREF (1+(R2/R1)) + IADJR2 * REQUIRED IF REGULATOR IS LOCATED FAR FROM POWER SUPPLY FILTER ** DESIGN C2 AS CLOSE TO VOUT PIN AS POSSIBLE AMC1084-ADJ application schematic Copyright 2002, ADD Microtech Corp. 2 www.addmtek.com AMC1084 AMC DOC. #: AMC1084_B November 5A LOW DROPOUT REGULATOR 2002 ABSOLUTE MAXIMUM RATINGS Input Voltage (VIN) Operating Junction temperature Storage Temperature Range Lead temperature (Soldering, 10 seconds) Note: (Note) 11V 150C -65C to 150C 300C Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. POWER DISSIPATION TABLE Derating factor JA Package (C /W ) ( mW/C ), TA 25OC TA 25C Power rating(mW) TA=70C Power rating(mW) TA= 85C Power rating (mW) T ST/ST3 45 45 22.2 22.2 2775 2775 1776 1776 1443 1443 SJ 80 12.5 1562 1000 812 Note: TJ = TA + (PD x JA) PD: Power dissipation. JA: Thermal resistance from Junction to Ambient. DF : Derating factor, JA = 1 / DF For T and ST/ST3 packages, JT = 3.0 C / W. For SJ package, JT = 7.0 C / W. TJ = TTAB + (PD x JT) 1. 2. 3. TTAB: Tab temperature. JT: Thermal resistance from junction to tab of the package. The JA numbers are guidelines for the thermal performance of the device/PC-board system. All of the above assume no ambient airflow. If power consumption is over above rating, adequate heat sink is required to dissipate heat. Input Voltage RECOMMENDED OPERATING CONDITIONS Parameter Symbol Recommended Operating Conditions Min. Typ. Max. VIN 2.75 10 Load Current (with adequate heatsinking) IO 0.010 5 Units V A Input Capacitor (VIN to GND) 1 F Output Capacitor with ESR of 10 max., (VOUT to GND) Operating Ambient Temperature Range 10 70 F C 125 C 0 Operating junction temperature Copyright 2002, ADD Microtech Corp. TJ 3 www.addmtek.com AMC1084 AMC DOC. #: AMC1084_B November 5A LOW DROPOUT REGULATOR 2002 BLOCK DIAGRAM VIN 1.25V VREF THERMAL LIMIT VOUT ADJ R1 For fixed output R2 AMC1084 circuit schematic Copyright 2002, ADD Microtech Corp. 4 www.addmtek.com AMC1084 AMC DOC. #: AMC1084_B November 5A LOW DROPOUT REGULATOR 2002 ELECTRICAL CHARACTERISTICS Unless otherwise specified, VIN = VOUT + 2V, IO = 10mA. These specifications apply operating ambient temperature range, and are for DC characteristics only. (Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) Parameter Symbol Test Conditions AMC1084-1.8 1.782 1.800 1.818 2.475 2.500 2.525 3.267 3.300 3.333 AMC1084-5.0 4.950 5.000 5.050 AMC1084-1.8 1.771 1.800 1.829 AMC1084-2.5 2.460 2.500 2.540 3.247 3.300 3.353 4.920 5.000 5.080 (Note 1) 1.238 1.250 1.262 IO = 10mA to 5A, (Note 1) 1.230 1.250 1.270 AMC1084-2.5 Output Voltage AMC1084-3.3 Output Voltage AMC1084-3.3 VOUT VOUT TA = 25C IO = 10mA to 5A AMC1084-5.0 Reference Voltage AMC1084 Min. Typ. Max. AMC1084-ADJ VREF Units V V V V Line Regulation (Note 2) VOI (1.5V + VOUT) VIN 10V 0.04 0.2 % Load regulation (Note 2) VOL IO = 10mA to 5A 0.08 0.3 % IO = 10mA 1.00 1.15 IO = 5A 1.15 1.30 6 13 mA 50 120 A 6.8 5 10 A mA Dropout Voltage V (Note 3) Quiescent Current ( for AMC1084-X.X) IQ VIN 10V, IO = 10mA to 5A Adjust Pin Current ( for AMC1084-ADJ) Current Limit Minimum Load Current (Note 4) Ripple Rejection (Note 5) IADJ ICL Imin RR 5.1 VRIPPLE = 1VPP, IO = 100mA, fO=120Hz 60 80 V dB Note 1 Output voltage is set to 2.5V. Note 2: Line and load regulations are guaranteed up to maximum power dissipation determined by input/output differential and the output current. However, the maximum power will not be available over the full input/output voltage range. Note 3: The specifications represent the minimum input/output voltage required to maintain 1% regulation. Note 4: The minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider used to set the output voltage is selected to meet the minimum load current requirement. Note 5: These parameters, although guaranteed, are not tested in production prior to shipment Copyright 2002, ADD Microtech Corp. 5 www.addmtek.com AMC1084 AMC DOC. #: AMC1084_B November 5A LOW DROPOUT REGULATOR 2002 CHARACTERIZATION CURVES CIN=10uF, COUT=22uF, TA=25C, unless otherwise specified. Load Regulation Load Regulation 2 2.6 VIN =3.8V, VOUT =1.8V Output Voltage (V) 1.95 VIN =4.5V,VOUT =2.5V 2.58 2.56 Output Voltage (V) 1.9 1.85 1.8 1.75 1.7 1.65 2.54 2.52 2.5 2.48 2.46 1.6 2.44 1.55 2.42 2.4 1.5 0 1 2 3 4 5 0 1 Output Current (A) 4 5 5.2 3 .5 VIN =5.3V, VOUT =3.3V 3 .4 5 VIN =7.0V, VOUT =5.0V 5.15 Output Voltage (V) Output Voltage (V) 3 Load Regulation Load Regulation 3 .4 3 .3 5 3 .3 3 .2 5 3 .2 5.1 5.05 5 4.95 4.9 4.85 3 .1 5 3 .1 4.8 3 .0 5 4.75 3 4.7 0 1 2 3 4 0 5 1 Output Current (A) 2 3 4 5 Output Current (A) Line Regulation Line Regulation 1.85 2.6 1.84 VOUT =1.8V 1.83 1.82 IO=10mA 1.81 VOUT =2.5V 2.58 Output Voltage (V) Output Voltage (V) 2 Output Current (A) 1.8 1.79 1.78 2.56 2.54 IO=10mA 2.52 2.5 2.48 IO=5A 2.46 IO=5A 1.77 2.44 1.76 2.42 1.75 2.4 4 5 6 7 8 9 10 4 Input Voltage (V) Copyright 2002, ADD Microtech Corp. 5 6 7 8 9 10 Input Voltage (V) 6 www.addmtek.com AMC1084 AMC DOC. #: AMC1084_B November 5A LOW DROPOUT REGULATOR 2002 CHARACTERIZATION CURVES (continued) CIN=10uF, COUT=22uF, TA=25C, unless otherwise specified. Line Regulation Line Regulation 3.4 5.2 VOUT =5.0V VOUT =3.3V Output Voltage V) Output Voltage (V) 5.15 IO=10mA 3.35 3.3 3.25 IO=5A 3.2 5.1 IO=10mA 5.05 5 4.95 IO=5A 4.9 3.15 4.85 3.1 4.8 4.5 5.5 6.5 7.5 8.5 9.5 7 8 Input Voltage (V) 2.6 2 VIN =5V, VOUT=2.5V 2.58 1.8 2.54 Dropout Voltage (V) 2.56 VOUT(V) 10 Dropout Voltage vs. Output Current Output Voltage vs. Temperature IO=10mA 2.52 2.5 2.48 IO=5A 2.46 1.6 1.4 1.2 1 0.8 0.6 2.44 0.4 2.42 0.2 2.4 0 -40 -20 0 20 40 60 80 0 100 120 1 2 3 4 5 Output Current (A) Temperature (C) Dropout Voltage vs. Temperature Quiescent Current vs. Output Current 5.6 2.4 5.5 2.2 5.4 Dropout Voltage (mV) Quiescent Current(mA) 9 Input Voltage (V) 5.3 5.2 5.1 5 4.9 4.8 4.7 2 1.8 1.6 IO=5A 1.4 1.2 1 0.8 0.6 IO=1A 0.4 4.6 0.2 4.5 0 0 1 2 3 4 5 -40 Copyright 2002, ADD Microtech Corp. -20 0 20 40 60 80 100 120 Temperature (C) Output Current (A) 7 www.addmtek.com AMC1084 AMC DOC. #: AMC1084_B November 5A LOW DROPOUT REGULATOR 2002 CHARACTERIZATION CURVES (continued) VIN=5V, CIN=10uF, COUT=22uF, TA=25C, unless otherwise specified. IO Load Transient Response With IO=5A, VOUT=3.3V IO 5A/Div 1A/Div Load Transient Response With IO=1A, VOUT=3.3V VOUT 10mV/Div 10mV/Div VOUT Time: 20s/ Div Time: 20s/ Div Load Transient Response With IO=5A, VOUT=2.5V 5A/Div 1A/Div Load Transient Response With IO=1A, VOUT=2.5V IO VOUT IO 10mV/Div 10mV/Div VOUT Time: 20s/ Div Copyright 2002, ADD Microtech Corp. Time: 20s/ Div 8 www.addmtek.com AMC1084 AMC DOC. #: AMC1084_B November 5A LOW DROPOUT REGULATOR 2002 Application Note: The maximum power dissipation of a single-output regulator: PD(MAX) = [(VIN(MAX) - VOUT(NOM))] x IOUT(NOM) + VIN(MAX) x IQ VOUT(NOM) = the nominal output voltage IOUT(NOM) = the nominal output current IQ = the quiescent current at IOUT(MAX) VIN(MAX) = the maximum input voltage Thermal consideration: The AMC1084 series have internal power and thermal limiting circuitry designed to protect the device under overload conditions. However maximum junction temperature ratings should not be exceeded under continuous normal load conditions. The thermal protection circuit of AMC1084 series will prevent the device from damage due to excessive power dissipation. When the device temperature rises to approximately 150C, the regulator will be turned off. When power consumption is over about 1.2W (for TO-220/ TO-263 package, 687mW for TO-252 package, at TA=70C), additional heat sink is required to control the junction temperature below 125C. The junction temperature is: TJ = PD (JT + CS + SA ) + TA PD:Dissipated power. JT:Thermal resistance from the junction to the mounting tab of the package. CS:Thermal resistance through the interface between the IC and the surface on which it is mounted. (typically, CS < 1.0C / W) SA : Thermal resistance from the mounting surface to ambient (thermal resistance of the heat sink). If PC Board copper is going to be used as a heat sink, below table can be used to determine the appropriate size of copper foil required. For multi-layered PCB, these layers can also be used as a heat sink. They can be connected with several through hole vias. 59 PCB SA (C / W ) 2 PCB heat sink size (mm ) 500 45 1000 38 1500 33 2000 27 3000 24 4000 21 5000 Recommended figure of PCB area used as a heat sink. through hole vias (Top View) Copyright 2002, ADD Microtech Corp. (Bottom View) 9 www.addmtek.com AMC1084 AMC DOC. #: AMC1084_B November 5A LOW DROPOUT REGULATOR 2002 3-Pin Plastic TO-220 (T) INCHES E MILLIMETERS MIN TYP MAX MIN TYP MAX 0.140 - 0.190 3.56 - 4.83 b1 0.045 - 0.070 1.14 - 1.78 b 0.020 - 0.045 0.51 - 1.14 c 0.012 - 0.045 0.30 - 1.14 D 0.560 - 0.650 14.22 - 16.51 E 0.380 - 0.420 9.65 - 10.67 e 0.090 - 0.110 2.29 - 2.79 e1 0.190 - 0.210 4.83 - 5.33 0.055 0.51 - 1.40 A P F A SEATING PLAN Q H1 D L1 F 0.020 L b1 b H1 0.230 - 0.270 5.84 - 6.86 J1 0.080 - 0.115 2.03 - 2.92 L 0.500 - 0.580 12.7 - 14.73 P 0.139 - 0.161 3.53 - 4.09 Q 0.100 - 0.135 2.54 - 3.43 L1 - 0.250 - - 6.35 c J1 e e1 - 3-Pin Surface Mount TO-263 (ST) INCHES E A c2 MIN TYP MAX MIN TYP MAX A 0.160 - 0.190 4.06 - 4.83 b 0.020 - 0.039 0.51 - 0.99 b2 0.045 - 0.055 1.14 - 1.40 c D L MILLIMETERS 0.015 TYP. 0.38 TYP. c2 0.045 - 0.055 1.14 - 1.40 D 0.340 - 0.380 8.64 - 9.65 E - 0.405 9.65 - 10.29 L3 L1 b e 0.380 e L c b2 0.100 BSC 0.575 - 0.625 14.61 - 15.88 L1 0.090 - 0.110 2.29 - 2.79 L2 - 0.115 - - 2.92 - 0.070 1.27 - 1.78 - L3 0.050 Copyright 2002, ADD Microtech Corp. 10 2.54 BSC www.addmtek.com AMC1084 AMC DOC. #: AMC1084_B November 5A LOW DROPOUT REGULATOR 2002 3-Pin Surface Mount TO-252 (SJ) INCHES A1 c1 TYP MAX MIN TYP MAX 0.086 - 0.094 2.18 - 2.39 A1 0.040 - 0.050 1.02 - 1.27 0.024 - - 0.61 - b2 0.205 - 0.215 5.21 - 5.46 c 0.018 - 0.023 0.46 - 0.58 c1 0.018 - 0.023 0.46 - 0.58 D 0.210 - 0.220 5.33 - 5.59 E - 0.265 6.35 - 6.73 A L2 b SEATING PLAN D H L1 b e MIN A E b2 - L c e1 Copyright 2002, ADD Microtech Corp. MILLIMETERS 11 0.250 e 0.090 BSC 2.29 BSC e1 0.180 BSC 4.58 BSC H 0.370 - 0.410 9.40 - 10.41 L 0.020 - - 0.51 - - L1 0.025 - 0.040 0.64 - 1.02 L2 0.060 - 0.080 1.52 - 2.03 www.addmtek.com AMC1084 AMC DOC. #: AMC1084_B November 5A LOW DROPOUT REGULATOR 2002 IMPORTANT NOTICE ADD Microtech (ADDM) reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. ADDM integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of ADDM products in such applications is understood to be fully at the risk of the customer. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. ADDM assumes to no liability to customer product design or application support. ADDM warrants the performance of its products to the specifications applicable at the time of sale. U.S. Asia Pacific region ADD Microtech Inc. 492 Altamont Drive Milpitas, CA 95035 ADD Microtech Corp 3F, 132, Sec. 4, Chung Hsiao E. Rd., Taipei, Taiwan T E L : (408) 9410420 FA X : (408) 9410864 T E L : 2-27760166 FA X : 2-27764208 Copyright 2002, ADD Microtech Corp. 12 www.addmtek.com