Standard Products VRG8687/VRG8688 Dual Voltage Regulator, 3.0 Amp, Positive Low Dropout (LDO), Adjustable Radiation Tolerant www.aeroflex.com/voltreg October 24, 2011 FEATURES Manufactured using Linear Technology Corporation (R) Space Qualified RH1084 die Radiation performance - Total dose > 100 krad (Si), Packaging - Hermetic metal Dose rate = 50 - 300 rads(Si)/s - Thru-hole or Surface mount - 8 Leads, .755"L x .415"W x .200"Ht Two-Independent voltage regulators - Power package Thermal shutdown - Weight - 6 gm max Output voltage adjustable: 1.25V to 23V Designed for aerospace and high reliability space Dropout voltage: 1.80V at 3.0Amps applications 3-Terminal Output current: 3.0Amps Voltage reference: 1.25V +2%, -3.2% Load regulation: 0.35% max Line regulation: 0.25% max Ripple rejection: >60dB Aeroflex Plainview's Radiation Hardness Assurance Plan is DLA Certified to MIL-PRF-38534, Appendix G. DESCRIPTION The Aeroflex Plainview VRG8687/8688 consists of two Positive Adjustable (RH1084) LDO voltage regulators each capable of supplying 3.0Amps over the output voltage range as defined under recommended operating conditions. The VRG8687/8688 offers excellent line and load regulation specifications and ripple rejection. There is full electrical isolation between the regulators and each regulator to the package. Dropout (VIN - VOUT) decreases at lower load currents for both regulators. The VRG8687/8688 serves a wide variety of applications including SCSI-2 Active Terminator, High Efficiency Linear Regulators, Post Regulators for Switching Supplies, Constant Current Regulators, Battery Chargers and Microprocessor Supply. The VRG8687/8688 has been specifically designed to meet exposure to radiation environments. The VRG8687 is configured for a Thru-Hole 8 lead metal power package and the VRG8688 is configured for a Surface Mount 8 lead metal power package. It is guaranteed operational from -55C to +125C. Available screened in accordance with MIL-PRF-38534, the VRG8687/8688 is ideal for demanding military and space applications. For detailed performance characteristic curves, applications information and typical applications see the latest Linear Technology Corporation (R) data sheets for their RH/LT1084, which is available on-line at www.linear.com. 1 5 ADJ_1 2 VOUT_1 RH1084 Positive Regulator 3 SENSE_1 VIN_1 ADJ_2 VOUT_2 SENSE_2 7 VIN_2 8 4 FIGURE 1 - BLOCK DIAGRAM / SCHEMATIC SCD8687 Rev B 6 RH1084 Positive Regulator ABSOLUTE MAXIMUM RATINGS Parameter Range Units Input Voltage +25 VDC Lead temperature (soldering 10 Sec) 300 C Input Output Differential 25 VDC Load Current, maximum 6.0 A Output Voltage +25 VDC 2000 to 3999 V Operating Junction Temperature Range -55 to +150 C Storage Temperature Range -65 to +150 C 5 C/W ESD (MIL-STD-883, M3015, Class 2) Thermal Resistance, Junction to case JC NOTICE: Stresses above those listed under "Absolute Maximums Rating" may cause permanent damage to the device. These are stress rating only; functional operation beyond the "Operation Conditions" is not recommended and extended exposure beyond the "Operation Conditions" may effect device reliability. RECOMMENDED OPERATING CONDITIONS Parameter Range Units Output Voltage Range 1.25 to 23 VDC Input Output Differential 3/ 1.8 to 24 VDC -55 to +125 C Case Operating Temperature Range ELECTRICAL PERFORMANCE CHARACTERISTICS 1/ UNLESS OTHERWISE SPECIFIED: -55C TC +125C Parameter Symbol Conditions (P PMAX) Min Max Units Reference Voltage 3/, 2/ VREF Line Regulation 3/, 2/ VOUT ILOAD = 10mA, 1.5V < (VIN - VOUT) < 15V VIN - 0.25 % Load Regulation 3/, 2/ VOUT 10mA < IOUT < 3.0A, (VIN - VOUT) = 3V IOUT - 0.35 % Dropout Voltage 4/, 2/ VDROP - 1.8 V Adjust Pin Current 2/ - - 120 A Adjust Pin Current Change 2/ - 10 mA < IOUT < 3.0A, 1.5V < (VIN - VOUT) < 15V - 5 A Minimum Load Current 5/, 2/ IMIN (VIN - VOUT) = 25V - 10 mA Current Limit 2/ ICL (VIN - VOUT) = 5V 5.25 - A 60 - dB 1.5V < (VIN - VOUT) < 15V, 10mA < IOUT < 3.0A VREF = 1%, IOUT = 3.0A 1.210 1.275 V Ripple Rejection 3/ - IOUT = 3.0A, (VIN - VOUT) = 3V, f = 120Hz, CADJ = COUT = 25F Thermal Regulation - 30ms pulse, TC = +25C - 0.015 %/W VREF Long-Term Stability 5/ - Burn In: TC = +125C @ 1000hrs minimum, tested @ 25C - 1.0 % Notes: 1/ The manufacturer's output current rating for the RH1084MK positive regulator integrated circuit is 5.0 Amps. For Compliance with the Current Density specifictation of MIL-STD-883 Rev. C, the electrical performance characteristics are specified at an output current of 3.0 Amps. 2/ Specification derated to reflect total dose exposure to 100krads (Si) at +25C. 3/ Line and load regulation are guaranteed up to the maximum power dissipation of 15W per device. Power dissipation is determined by the input/output differential voltage and the output current. Guaranteed maximum power dissipation will not be available over the full input/output voltage range. 4/ Dropout voltage is specified over the full output current range of the device. 5/ Not tested. Shall be guaranteed by design, characterization, or correlation to other tested parameters. SCD8687 Rev B 10/24/11 2 Aeroflex Plainview 60 50 40 Maximum Power Dissipation (Watts) 30 Both Regulators 20 1 Regulator 10 0 0 20 40 60 80 100 120 140 Case Temperature (C) FIGURE 2 - MAXIMUM POWER vs CASE TEMPERATURE The maximum Power dissipation is limited by the thermal shutdown function of each regulator chip in the VG8687/8688. The graph above represents the achievable power before the chip shuts down. The first line in the graph represents the maximum power dissipation of the VG8687/8688 with one regulator on (the other off) and the other line represents both regulators on dissipating equal power. If both regulators are on and one regulator is dissipating more power that the other, the maximum power dissipation of the VG8687/8688 will fall between the two lines. This graph is based on the maximum junction temperature of 150C and a thermal resistance (JC) of 5C/W. See Note 1/ on page 2 FIGURE 3 - RH1084 SHORT CIRCUIT CURRENT SCD8687 Rev B 10/24/11 3 Aeroflex Plainview FIGURE 4 - RH1084 DROPOUT VOLTAGE TYPICAL CURVE SENSE VIN VRG8687/88 10F Tant. VOUT VREF R1 22F Tant. ADJ VREF = 1.25V, IADJ = 55A +Reg = VOUT = VREF (1+R2/R1) + (IADJ x R2) R2 FIGURE 5 - BASIC RH1084 ADJUSTABLE REGULATOR APPLICATION SCD8687 Rev B 10/24/11 4 Aeroflex Plainview TABLE I - PIN NUMBERS vs FUNCTION PIN FUNCTION 1 ADJ_1 2 VOUT_1 3 SENSE_1 4 VIN_2 5 ADJ_2 6 VOUT_2 7 SENSE_2 8 VIN_1 .300 .090 8X .100 .108 o .010 M CBA .150 REF. o.145 THRU 2x .028 MAX. 8 7 6 2 MAX. TYP. 5 .720 .020 MEASURED LEAD TIP .415 .2075 -C- 1 2 3 4 ESD/PIN 1 IDENT .230 MIN .515 R.065 TYP. 4 PLCS .632 .755 .003 .122 -B- o .010 BCA .220 MAX. .005 -A- .040 .030 DIA. .002 o .010 M CBA Notes: 1. Dimension Tolerance: .005 inches 2. Package contains BeO substrate 3. Case electrically isolated FIGURE 5 - VRG8687 PACKAGE OUTLINE -- THRU-HOLE POWER PACKAGE SCD8687 Rev B 10/24/11 5 Aeroflex Plainview TABLE II - PIN NUMBERS vs FUNCTION PIN FUNCTION 1 ADJ_1 2 VOUT_1 3 SENSE_1 4 VIN_2 5 ADJ_2 6 VOUT_2 7 SENSE_2 8 VIN_1 .300 .090 8X .100 .108 o .010 .150 REF. CBA o.145 THRU 2x .028 MAX. M 7 8 6 .060 .005 5 .415 .886 .020 .2075 -C- 2 1 3 4 ESD/PIN 1 IDENT .515 R.065 TYP. 4 PLCS .632 .755 .003 .122 -B- o .010 BCA .220 MAX. .005 -A- .020.005 .030 DIA. .002 o .010 M CBA .040 Notes: 1. Dimension Tolerance: .005 inches 2. Package contains BeO substrate 3. Case electrically isolated FIGURE 6 - VRG8688 PACKAGE OUTLINE -- SURFACE MOUNT POWER PACKAGE SCD8687 Rev B 10/24/11 6 Aeroflex Plainview ORDERING INFORMATION MODEL DLA SMD # SCREENING VRG8687-7 - Commercial Flow, +25C testing only VRG8687-S - Military Temperature, -55C to +125C Screened in accordance with the individual Test Methods of MIL-STD-883 for Space Applications VRG8687-201-1S 5962-1021302KUC VRG8687-201-2S 5962-1021302KUA PACKAGE 8 Lead Thru-Hole Power Pkg DLA SMD Pending VRG8688-7 - Commercial Flow, +25C testing only VRG8688-S - Military Temperature, -55C to +125C Screened in accordance with the individual Test Methods of MIL-STD-883 for Space Applications VRG8688-201-1S 5962-1021302KZC VRG8688-201-2S 5962-1021302KZA 8 Lead Surface Mount Power Pkg DLA SMD Pending EXPORT CONTROL: EXPORT WARNING: This product is controlled for export under the International Traffic in Arms Regulations (ITAR). A license from the U.S. Department of State is required prior to the export of this product from the United States. Aeroflex's military and space products are controlled for export under the International Traffic in Arms Regulations (ITAR) and may not be sold or proposed or offered for sale to certain countries. (See ITAR 126.1 for complete information.) PLAINVIEW, NEW YORK Toll Free: 800-THE-1553 Fax: 516-694-6715 INTERNATIONAL Tel: 805-778-9229 Fax: 805-778-1980 NORTHEAST Tel: 603-888-3975 Fax: 603-888-4585 SE AND MID-ATLANTIC Tel: 321-951-4164 Fax: 321-951-4254 WEST COAST Tel: 949-362-2260 Fax: 949-362-2266 CENTRAL Tel: 719-594-8017 Fax: 719-594-8468 www.aeroflex.com info-ams@aeroflex.com Aeroflex Microelectronic Solutions reserves the right to change at any time without notice the specifications, design, function, or form of its products described herein. All parameters must be validated for each customer's application by engineering. No liability is assumed as a result of use of this product. No patent licenses are implied. Our passion for performance is defined by three attributes represented by these three icons: solution-minded, performance-driven and customer-focused and the Linear Technology logo are registered trademarks and RH1084 are a copyright of Linear Technology Corporation. SCD8687 Rev B 10/24/11 7