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| LX8580A INTEGRATED PRODUCTS 7.5A Very Low Dropout Positive Regulator PRODUCTION DATA SHEET DESCRIPTION KEY FEATURES WWW .Microsemi .C OM The LX8580A is a highperformance, very low dropout voltage regulator, designed for use with advanced microprocessors, micro controllers, or video graphics controllers. This product can be used with separate voltage supplies for the control and power sections, allowing a power regulation dropout voltage as low as 100mV @ 1.5A. In AGP bus systems requiring regulation of 3.3V to 2.85V @ 3A, the LX8580A has a max dropout of 250mV making it an ideal power supply solution for today's graphics applications. The LX8580A can also be used in a single voltage supply configuration with a dropout performance similar to that of the LX8584 (1.3V @ 7.5A). The LX8580A is supplied in a fiveterminal TO-220, TO-263, or Linfinity's S-PAK packages, which allows the implementation of remote (Kelvin) voltage sensing. This sensing compensates for output voltage variations due to load changes and resistive voltage drops in connectors and board traces. Typical load regulation measured at the sense pin is less that 1mV for a load current step of 7mA to 7.5A. The LX8580A is ideal for generating a secondary 2V-2.85V low voltage supply on a motherboard where a 3.3V supply is already available. Low Dropout, 650mV at 7.5A Output Current in Dual Supply Mode Fast Transient Response Remote Sensing 1mV Load Regulation Adjustable Output APPLICATIONS/BENEFITS Microprocessor/Micro controller Supplies 3.3V to 2.85V Voltage Conversion High-Current Regulators Post Regulation for Switching Power Supplies IMPORTANT: For the most current data, consult MICROSEMI's website: http://www.microsemi.com PRODUCT HIGHLIGHT V CTR L V OUT + 1.3V Max 4 V CT RL OUTPUT 3 V OUT LX8580A V PW R V OUT + V DROPOUT 5 V PW R SENSE 1 R1 RL R2 ADJUST 2 VOUT = VREF 1 + R2 + I ADJ x R 2 R1 LX8580A LX8580A TA (C) 0 to 125 DROPOUT VOLTAGE 0.1V - 0.7V PACKAGE ORDER INFO Plastic TO-220 S-PAK P DF 5-pin 5-Pin LX8580A-00CP LX8580A-00CDF DD Plastic TO-263 5-PIN LX8580A-00CDD Note: Available in Tape & Reel. Append the letter "T" to the part number. (i.e. LX8580A-00CDDT) Copyright 2001 Rev. 1.4, 2003-01-06 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LX8580A INTEGRATED PRODUCTS 7.5A Very Low Dropout Positive Regulator PRODUCTION DATA SHEET ABSOLUTE MAXIMUM RATINGS PACKAGE PIN OUT WWW .Microsemi .C OM VCTRL Input Voltage .........................................................................................13V VPWR Input Voltage ............................................................................................7V Power Dissipation ..................................................................... Internally Limited Operating Junction Temperature.................................................................. 150C Storage Temperature Range...........................................................-65C to 150C Lead Temperature (Soldering 180 seconds)................................................. 300C Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal. TAB is OUTPUT 5 4 3 2 1 P PACKAGE (5-PIN) (Top View) VPWR VCTRL OUTPUT ADJUST SENSE TAB is OUTPUT THERMAL DATA 5 4 3 2 VPWR VCTRL OUTPUT ADJUST SENSE P Plastic TO-220 5-Pin 3.0C/W 65C/W JT THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA THERMAL RESISTANCE-JUNCTION TO TAB, 1 DD PACKAGE (5-PIN) (Top View) DD Plastic TO-263 5-Pin JT JA 3.0C/W 35C/W TAB is OUTPUT VPWR VCTRL OUTPUT ADJUST SENSE THERMAL RESISTANCE-JUNCTION TO TAB, 5 4 3 2 THERMAL RESISTANCE-JUNCTION TO AMBIENT, DF Plastic S-Pack 5-Pin JT JA 3.0C/W 35C/W 1 THERMAL RESISTANCE-JUNCTION TO TAB, DF PACKAGE (Top View) THERMAL RESISTANCE-JUNCTION TO AMBIENT, Junction Temperature Calculation: TJ = TA + (PD x JA). JA assume device is mounted on a 0.5 inch2 copper pad. The JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. FUNCTIONAL PIN DESCRIPTION PIN 1 NAME SENSE DESCRIPTION This pin is the positive side of the reference voltage for the device. With this pin it is possible to Kelvin-sense the output voltage at the load. This pin is the negative side of the reference voltage for the device. Ripple rejection can be improved by adding a small bypass capacitor from the ADJUST pin to ground. The capacitor value should be selected so that: 1 CR 2FRR1 where FR is the ripple frequency and R1 is the value of the resistor between the ADJUST and SENSE leads of the LX8580A 3 4 OUTPUT VCTRL 2 ADJUST PACKAGE DATA PACKAGE DATA This is the regulated power output of the device This pin is the voltage supply pin for the control circuitry of the device. The current flow into this pin will be about 1% of the output current. Please refer to the electrical characteristics section of the data sheet for dropout voltage for load conditions. This is the collector of the power section of the LX8580A. The output load current is supplied through this pin. For the device to regulate, the voltage at this pin must be between 0.1V and 0.8V greater than the output voltage (Higher output current require higher voltages differences between VPWR and OUTPUT). 5 VPWR Copyright 2001 Rev. 1.4, 2003-01-06 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 LX8580A INTEGRATED PRODUCTS 7.5A Very Low Dropout Positive Regulator PRODUCTION DATA SHEET Unless otherwise specified, the following specifications apply over the operating ambient temperature 0C TA 125C. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures are equal to the ambient temperature. Parameter Symbol Test Conditions VCTRL = 2.75V, VPWR = 2V, ILOAD = 10mA, TA=25C Reference Voltage VREF VCTRL = 2.7V to 6V, VPWR = 1.75V to 5.5V ILOAD = 10mA to 4A VCTRL = 2.7V to 6V, VPWR = 2.05V to 5.5V ILOAD = 10mA to 7.5A VCTRL = 2.5V to 10V, VPWR = 1.75V to 5.5V ILOAD = 10mA, TA=25C VCTRL = 2.5V to 10V, VPWR = 1.75V to 5.5V ILOAD = 10mA VCTRL = 2.75V, VPWR = 2.1V ILOAD = 10mA to 7.5A (VADJ = 0) 30ms Pulse Control Circuitry/Power Transistor VCTRL = VPWR = 3.75V Avg, VRIPPLE = 1VP-P VADJ = 0, IOUT = 4A VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 100mA VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 3A VCTRL = 2.75V, VPWR = 1.75V, ILOAD = 3A VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 7.5A VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 0mA, VADJ = 0 VCTRL = 2.75V, VPWR = 2.05V, VOUT = 100mV, VADJ = 0 VPWR = 2.05, ILOAD = 100mA VPWR = 2.05, ILOAD = 1.5A VPWR = 2.05, ILOAD = 3A VPWR = 2.05, ILOAD = 5A VPWR = 2.05, ILOAD = 7.5A VCTRL = 2.75V, ILOAD = 100mA VCTRL = 2.75V, ILOAD = 1.5A, TA = 85C VCTRL = 2.75V, ILOAD = 1.5A VCTRL = 2.75V, ILOAD = 3A, TA = 85C VCTRL = 2.75V, ILOAD = 3A VCTRL = 2.75V, ILOAD = 5A, TA = 85C VCTRL = 2.75V, ILOAD = 5A VCTRL = 2.75V, ILOAD = 7.5A, TA = 85C VCTRL = 2.75V, ILOAD = 7.5A VCTRL = 5V, VPWR = 3.3V, VADJ = 0 Note 3 ELECTRICAL CHARACTERISTICS WWW .Microsemi .C OM Min 1.243 1.237 1.237 LX8580A Typ Max 1.250 1.250 1.250 1 2 2 0.002 0.65 1.257 1.263 1.263 3 6 7 0.020 2.70 Units V mV mV mV %/W C/W dB Line Regulation VREF(VIN) Load Regulation Thermal Regulation Thermal Resistance Ripple Rejection VREF(IOUT) VOUT(Pwr) RJT 60 80 3 30 33 70 10 50 55 120 100 VCTRL Pin Current (Note 2) ICTRL mA Adjust Pin Current Current Limit IADJ IOUT(MAX) 20 7.7 60 9 0.90 1.00 1.05 1.06 1.10 0.03 0.10 0.13 0.20 0.25 0.38 0.40 0.52 0.59 5 A A Dropout Voltage (Control Section) Minimum VCTRL (Note 1) (VPWR - VOUT) VCTRL-VOUT Dropout Voltage (Power Section) Minimum VPWR (Note 1) (VPWR - VOUT) (VADJ = 0) VPWR-VOUT 1.15 1.15 1.18 1.20 1.30 0.05 0.13 0.15 0.25 0.28 0.43 0.45 0.65 0.70 10 V V ELECTRICALS ELECTRICALS Minimum Load Current mA Note 1: Dropout is caused by either minimum control voltage (VCTRL) or minimum power voltage (VPWR). Both parameters are specified with respect to the output voltage. The specifications represent the minimum input/output voltage required to maintain 1% regulation. Note 2: The control pin current is the drive current required for the output transistor. This current will track output current with roughly a 1:100 ratio. The minimum value is equal to the quiescent current of the device. Note 3: Minimum load current is defined as the amount of output current required to maintain regulation. Typically this current provides the bias to the external resistor divider network used to set the output voltage. Copyright 2001 Rev. 1.4, 2003-01-06 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 LX8580A INTEGRATED PRODUCTS 7.5A Very Low Dropout Positive Regulator PRODUCTION DATA SHEET SIMPLIFIED BLOCK DIAGRAM WWW .Microsemi .C OM V CT RL V PW R Current Limiting Amplifier OUTPUT Thermal O verload Voltage Regulation Amplifier SENSE V REF ADJUST TYPICAL APPLICATION 5.0V Tantalum 33F VCTRL OUTPUT SENSE VOUT = 2.8V R VOUT = VREF 1+ 2 + IADJ x R 2 R 1 R1 LX8580A VPWR ADJUST BLOCK DIAGRAM 500F 3.3V Tantalum 100F R2 R1 = 121 R2 = 150 Copyright 2001 Rev. 1.4, 2003-01-06 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 LX8580A INTEGRATED PRODUCTS 7.5A Very Low Dropout Positive Regulator PRODUCTION DATA SHEET CHARACTERISTIC CURVES Reference Voltage vs. Temperature 1.2530 1.2525 WWW .Microsemi .C OM Load Regulation vs. Output Current Output Voltage Deviation(%) 0.20 V REF(VOLTS) 0.15 1.2520 1.2515 1.2510 1.2505 1.2500 0 25 50 75 100 125 0.10 0.05 0.00 0 1 2 3 4 5 6 7 8 TJ (C) Output Current (A) VCTRL Dropout, VPWR=3.25V 1.12 0.6 VPWR Dropout Voltage vs. IOUT V CTRL Dropout (V) 1.10 1.08 1.06 1.04 1.02 1.00 0 2 4 6 8 0.5 125C 85C IOUT (A) 0.4 0.3 0.2 0.1 0.0 0 1 2 3 4 5 6 7 8 0C Output Current (A) Pow er Dropout (V) Transient Response 100 Ripple Rejection Ripple Rejection (dB) 90 80 70 60 50 40 30 20 10 100 1000 10000 100000 Vout=1.25V Vin=3.3V Vripple=1Vpp Cout=820uF electrolytic +2.2uF ceramic Cadj= 0 uF GRAPHS GRAPHS Frequency (Hz) Copyright 2001 Rev. 1.4, 2003-01-06 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 LX8580A INTEGRATED PRODUCTS 7.5A Very Low Dropout Positive Regulator PRODUCTION DATA SHEET PACKAGE DIMENSIONS WWW .Microsemi .C OM P 5-Pin Plastic TO-220 B S F T Dim A B C D F G J K N R S T A 1 5 R C K D J G N MILLIMETERS MIN MAX 14.23 16.51 9.66 10.66 3.56 4.82 0.46 0.89 3.56 4.06 3.40 0.31 1.14 12.70 14.73 6.80 TYP 2.04 2.92 1.14 1.39 5.85 6.85 INCHES MIN MAX 0.560 0.650 0.380 0.420 0.140 0.190 0.018 0.035 0.140 0.160 0.134 0.012 0.045 0.500 0.580 0.268 TYP 0.080 0.115 0.045 0.055 0.230 0.270 DD 5-Pin Plastic TO-263 A I D Dim C B K M N H F E G A B C D E F G H I J K M N MILLIMETERS MIN MAX 10.03 10.67 8.51 9.17 4.19 4.59 1.14 1.40 0.330 0.51 0.74 0.89 1.57 1.83 2.29 2.79 - 1.65 0 0.25 14.60 15.87 7 3 INCHES MIN MAX 0.395 0.420 0.335 0.361 0.165 0.181 0.045 0.055 0.013 0.020 0.029 0.035 0.062 0.072 0.090 0.110 - 0.065 0 0.010 0.575 0.625 7 3 M MECHANICALS 0 -8 J Seating Plane Copyright 2001 Rev. 1.4, 2003-01-06 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6 LX8580A INTEGRATED PRODUCTS 7.5A Very Low Dropout Positive Regulator PRODUCTION DATA SHEET PACKAGE DIMENSIONS WWW .Microsemi .C OM DF 5-Pin Plastic S-Pak A C Dim B K H J F I G E D A B C D E F G H I J K MILLIMETERS MIN MAX 9.27 9.52 7.87 8.13 1.78 2.03 2.80 3.10 1.50 1.75 0.63 0.79 1.70 BSC 0.79 1.04 6.50 BSC 0.03 0.13 10.41 10.67 INCHES MIN MAX 0.365 0.375 0.310 0.320 0.070 0.080 0.110 0.122 0.059 0.069 0.025 0.031 0.067 BSC 0.031 0.041 0.256 BSC 0.001 0.005 0.410 0.420 Note: Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006") on any side. Lead dimension shall not include solder coverage. MECHANICALS MECHANICALS Copyright 2001 Rev. 1.4, 2003-01-06 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 7 LX8580A INTEGRATED PRODUCTS 7.5A Very Low Dropout Positive Regulator PRODUCTION DATA SHEET NOTES WWW .Microsemi .C OM NOTES NOTES PRODUCTION DATA - Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not necessarily include testing of all parameters. Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright 2001 Rev. 1.4, 2003-01-06 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 8 |
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