AMC7585 5A LOW DROPOUT REGULATOR www.addmtek.com DESCRIPTION FEATURES The AMC7585 is a high performance low dropout regulator rated for 5A output current with fixed 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 2.5V to 3.6V power supply. 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 EZ1585B and LT1585A series. In addition, the AMC7585 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 PACKAGE PIN OUT 3.VIN 2.VOUT 1.ADJ/GND 3.VIN 2.VOUT 1.ADJ/GND Pentium® Processor Supplies PowerPCTM Supplies Computer Add-On Cards Other Applications Requiring Low Dropout Voltage Over Rated Current 3-Pin Plastic TO-220 3-Pin Plastic TO-252 Surface Mount (Top View) (Top View) VOLTAGE OPTIONS 3.VIN 2.VOUT 1.ADJ/GND 3.VIN 2.VOUT 1.ADJ/GND AMC7585-2.5 – 2.5V Fixed AMC7585-3.3 – 3.3V Fixed AMC7585-5.0 – 5.0V Fixed 3-Pin Plastic TO-263 (ST) Surface Mount 3-Pin Plastic TO-263-3 (ST3) Surface Mount AMC7585-ADJ – Adjustable (Top View) (Top View) ORDER INFORMATION TA (OC) 0 to 70 0 to 70 0 to 70 0 to 70 T TO-220 3-pin AMC7585-X.XT ST TO-263 3-pin TO-263-3 ST3 3-pin AMC7585-X.XST AMC7585-X.XTF(Lead Free) AMC7585-X.XSTF(Lead Free) AMC7585-ADJT AMC7585-ADJST AMC7585-ADJTF(Lead Free) AMC7585-ADJSTF(Lead Free) SJ TO-252 3-pin - AMC7585-X.XSJ - AMC7585-X.XSJF(Lead Free) AMC7585-ADJST3 AMC7585-ADJSJ AMC7585-ADJST3F(Lead Free) AMC7585-ADJSJF(Lead Free) Note: 1. All surface-mount packages are available in Tape & Reel. Append the letter “T” to part number (i.e., AMC7585-X.XSTT, AMC7585-X.XST3T, AMC7585-X.XSJT ). 2. The letter ”F” is marked for Lead Free process. Copyright © 2007 ADDtek Corp. 1 DD041_G -- OCTOBER 2007 AMC7585 TYPICAL APPLICATION VIN ≥ 4V AMC7585-X.X VOUT 2.5V/3.3V/5V C1 C2 10µF 22µF AMC7585-X.X Application Schematic AMC7585 - ADJ VIN VOUT R1 1% ADJ *C1 10µF ** C2 22µF R2 1% * REQUIRED IF REGULATOR IS LOCATED FAR FROM POWER SUPPLY FILTER ** DESIGN C2 AS CLOSE TO VOUT PIN AS VOUT = VREF (1+(R2/R1)) + IADJR2 POSSIBLE AMC7585-ADJ Application Schematic Copyright © 2007 ADDtek Corp. 2 DD041_G -- OCTOBER 2007 AMC7585 ABSOLUTE MAXIMUM RATINGS (Note) Input Voltage (VIN) Operating Junction temperature Storage Temperature Range Lead temperature (Soldering, 10 seconds) 7V 150 OC -65 OC to 150 OC 300 OC Note: 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 TA=70 °C TA= 85 °C TA ≤ 25 °C ( mW/ °C ) Power rating (mW) Power rating (mW) Power rating (mW) TA ≥ 25OC Package θJT (°C /W ) θJA (°C /W ) T TF ST/ST3 STF/ST3F SJ 6 6 6 6 7 45 45 45 45 80 22.2 22.2 22.2 22.2 12.5 2775 2775 2775 2775 1562 1776 1776 1776 1776 1000 1443 1443 1443 1443 812 SJF 7 80 12.5 1562 1000 812 Note: TJ = TA + (PD × θJA) PD: Power dissipation. θJA: Thermal resistance from Junction to Ambient. For T and ST/ST3 packages, θJT = 6.0 °C / W. For SJ package, θJT = 7.0°C /W. TJ = TTAB + (PD × θJT) TTAB: Tab temperature. θJT: Thermal resistance from junction to tab of the package. 1. The θJA numbers are guidelines for the thermal performance of the device/PC-board system. 2. All of the above assume no ambient airflow. 3. If power consumption is over above rating, adequate heat sink is required to dissipate heat. RECOMMENDED OPERATING CONDITIONS Parameter Symbol Recommended Operating Conditions Min. Input Voltage Load Current (with adequate heatsinking) 2.75 7 V IO 0.010 5 A 1 Output Capacitor with ESR of 10Ω max., (VOUT to GND) Operating Ambient Temperature Range 10 Copyright © 2007 ADDtek Corp. 0 TJ 3 Units Max. VIN Input Capacitor (VIN to GND) Operating junction temperature Typ. µF 70 125 µF O C O C DD041_G -- OCTOBER 2007 AMC7585 BLOCK DIAGRAM VIN VOUT THERMAL LIMIT GND 1.25V VREF AMC7585-X.X Circuit Schematic VIN 1.25V VREF THERMAL LIMIT VOUT ADJ AMC7585-ADJ Circuit Schematic Copyright © 2007 ADDtek Corp. 4 DD041_G -- OCTOBER 2007 AMC7585 ELECTRICAL CHARACTERISTICS Unless otherwise specified, VIN = VOUT + 1.5V, 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 AMC7585-2.5 Output Voltage AMC7585-3.3 VOUT 2.475 2.500 2.525 3.267 3.300 3.333 4.950 5.000 5.050 2.450 2.500 2.550 3.234 3.300 3.366 4.900 5.000 5.100 (Note 1) 1.238 1.250 1.262 IO = 10mA to 5A, (Note 1) 1.230 1.250 1.270 O IO = 10mA, TA = 25 C AMC7585-5.0 AMC7585-2.5 Output Voltage AMC7585-3.3 AMC7585-5.0 Reference Voltage VOUT AMC7585-ADJ VREF AMC7585 Min. Typ. Max. Test Conditions VIN = VOUT + 1.5V to 10V, IO = 0mA to 5A Units V V V Line Regulation (Note 2) ΔVOI (1.5V + VOUT) ≤ VIN ≤ 7V 0.04 0.2 % Load Regulation (Note 2) ΔVOL IO=10mA to 5A 0.2 0.4 % ΔV IO = 5A (Note 3) 1.30 1.50 V 8 13 mA 50 120 µA Dropout Voltage Quiescent Current ( for AMC7585-X.X) IQ Adjust Pin Current ( for AMC7585-ADJ) IADJ Current Limit ICL Minimum Load Current (Note 4) Ripple Rejection (Note 5) VIN ≤ 7V, IO = 10mA to 3A (VIN - VOUT)=2V 5.1 Imin RR 6.8 5 VRIPPLE = 1VPP, IO = 100mA, fO=120Hz 60 80 A 10 mA dB Note 1 Output voltage is set to be 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 © 2007 ADDtek Corp. 5 DD041_G -- OCTOBER 2007 AMC7585 CHARACTERISTIC CURVES CIN=10uF, COUT=22uF, TA=25 OC, unless otherwise specified. Load Regulation Load Regulation 2.6 2 VIN =3.8V, VOUT =1.8V VIN =4.5V,VOUT =2.5V 2.58 2.56 1 .9 Output Voltage (V) Output Voltage (V) 1 .9 5 1 .8 5 1 .8 1 .7 5 1 .7 1 .6 5 1 .6 2.54 2.52 2.5 2.48 2.46 2.44 2.42 1 .5 5 2.4 1 .5 0 1 2 3 4 0 5 1 2 Output Current (A) 5 5.2 VIN =5.3V, VOUT =3.3V 3 .4 5 VIN =7.0V, VOUT =5.0V 5.15 5.1 Output Voltage (V) 3 .4 Output Voltage (V) 4 Load Regulation Load Regulation 3 .5 3 .3 5 3 .3 3 .2 5 3 .2 3 .1 5 5.05 5 4.95 4.9 4.85 3 .1 4.8 3 .0 5 4.75 3 4.7 0 1 2 3 4 5 0 1 2 3 4 5 Output Current (A) Output Current (A) Quiescent Current vs. Temperature Output Voltage v.s. Temperature 8 2.6 Quiescent Current (mA) VIN =5V, VOUT=2.5V 2.58 2.56 IO=10mA 2.54 VOUT(V) 3 Output Current (A) 2.52 2.5 2.48 2.46 IO=5A 2.44 2.42 7 6 5 4 3 2 2.4 -40 -20 0 20 40 60 80 O Temperature ( Copyright © 2007 ADDtek Corp. 100 -40 -20 120 0 20 40 60 80 100 120 O Temperature ( C) C) 6 DD041_G -- OCTOBER 2007 AMC7585 APPLICATION INFORMATION The maximum power dissipation of a single-output regulator: PD(MAX) = [(VIN(MAX) - VOUT(NOM))] × IOUT(NOM) + VIN(MAX) × IQ VOUT(NOM) = the nominal output voltage IOUT(NOM) = the nominal output current, and IQ = the quiescent current the regulator consumes at IOUT(MAX) VIN(MAX) = the maximum input voltage Thermal consideration: The AMC7585 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 AMC7585 series will prevent the device from damage due to excessive power dissipation. When the device temperature rises to approximately 150 °C, 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=70 °C), additional heat sink is required to control the junction temperature below 125 °C. The junction temperature is: TJ = PD (θJT + θTS + θSA ) + TA P D : Dissipated power. θJT : Thermal resistance from the junction to the mounting tab of the package. (For TO-220, TO-263, and TO-263-3 packages, θJT=6 °C /W. For TO-252 package, θJT=7°C /W) θTS : Thermal resistance through the interface between the IC and the surface on which it is mounted. (typically, θCS < 1.0 °C / W) θSA : 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. PCB θSA (°C / W ) PCB heat sink size (mm2) 59 500 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 (Bottom View) (Top View) Copyright © 2007 ADDtek Corp. 7 DD041_G -- OCTOBER 2007 AMC7585 PACKAGE 3-Pin Plastic TO-220 (T) E INCHES A P F MIN TYP MILLIMETERS MAX MIN TYP MAX SEATING PLAN Q 0.140 - 0.190 3.56 - 4.83 b1 0.045 A - 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 H1 D L1 F L b1 b c J1 e e1 0.055 0.51 - 1.40 H1 0.230 0.020 - 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 - 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 © 2007 ADDtek Corp. 8 2.54 BSC DD041_G -- OCTOBER 2007 AMC7585 3-Pin Surface Mount TO-263 (ST3) INCHES E 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 A c2 c D L L1 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 0.380 e L 0.100 BSC 2.54 BSC 0.575 - 0.625 14.61 - 15.88 L1 0.090 - 0.110 2.29 - 2.79 L2 - 0.115 - - 2.92 c b e MILLIMETERS b2 - 3-Pin Surface Mount TO-252 (SJ) INCHES MIN 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 - - 0.215 5.21 - 5.46 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 E b2 A1 c1 A L2 SEATING PLAN b - b2 0.205 D H L1 b e c L c e1 Copyright © 2007 ADDtek Corp. MILLIMETERS 9 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 DD041_G -- OCTOBER 2007 AMC7585 IMPORTANT NOTICE ADDtek 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. ADDtek 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 ADDtek 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. ADDtek assumes to no liability to customer product design or application support. ADDtek warrants the performance of its products to the specifications applicable at the time of sale. ADDtek Corp. 9F, No. 20, Sec. 3, Bade Rd., Taipei, Taiwan, 105 TEL: 2-25700299 FAX: 2-25700196 Copyright © 2007 ADDtek Corp. 10 DD041_G -- OCTOBER 2007