Standard Products VRG8661 Adjustable Regulator Negative Voltage Radiation Tolerant www.aeroflex.com/voltreg January 7, 2009 FEATURES Manufactured using Linear Technology Corporation (R) Space Qualified RH137 die Radiation performance - Total dose: 100 krads(Si), Dose rate = 50 - 300 rads(Si)/s Thermal shutdown Output voltage adjustable: -1.25V to -27V 3-Terminal Output current: 1.5A Voltage reference: -1.25V 4% Load regulation: 1.0% max Line regulation: 0.05% max Ripple rejection: >66dB Packaging - Hermetic Ceramic -SMD-0.5 Surface mount - 3 Pads, .301"W x .405"L x .130"Ht max - Power package - Weight - 2 gm max Designed for aerospace and high reliability space applications DSCC SMD 5962-09206 pending Note: Aeroflex Plainview does not currently have a DSCC certified Radiation Hardened Assurance Program. DESCRIPTION The Aeroflex Plainview VRG8661 consists of a Negative Adjustable (RH137) voltage regulator capable of supplying 1.5Amps over the output voltage range as defined under recommended operating conditions. The VRG8661 offers excellent line and load regulation specifications and ripple rejection. Dropout (Vin - Vout) decreases at lower load currents. The VRG8661 serves a wide variety of applications including High Efficiency Linear Regulators, Post Regulators for Switching Supplies, Constant Current Regulators, Battery Chargers and Microprocessor Supply. The VRG8661 has been specifically designed to meet exposure to radiation environments and is configured for a SMD-0.5 SMT power package. It is guaranteed operational from -55C to +125C. Available screened to MIL-STD-883, the VRG8661 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 RH137, which is available on-line at www.linear.com. 3 ADJ 2 VOUT RH137 Negative Regulator VIN 1 SCD8661 Rev B FIGURE 1 - BLOCK DIAGRAM / SCHEMATIC ABSOLUTE MAXIMUM RATINGS RANGE UNITS Lead temperature (soldering 10 Sec) PARAMETER 300 C Input-Output Voltage Differential -30 VDC 1.999 1/ KV Operating Junction Temperature Range -55 to +150 C Storage Temperature Range -65 to +150 C ESD 1/ Meets ESD testing per MIL-STD-883, method 3015, Class 1C. 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 -27 VDC Case Operating Temperature Range -55 to +125 C ELECTRICAL PERFORMANCE CHARACTERISTICS 1/ SYM CONDITIONS (P PMAX) MIN MAX UNITS Reference Voltage VREF -3V < (VIN - VOUT) < VDIFF MAX, 10mA < IOUT < IMAX -1.200 -1.300 V Line Regulation 2/ VOUT VIN - 0.05 %/V - 50 1.0 mV % - 0.02 %/W 66 - dB - 100 A 10mA < IOUT < IMAX - 5 -3V < (VIN - VOUT) < -27V - 5 (VIN - VOUT) = -27V - 5 (VIN - VOUT) < -10V - 3 (VIN - VOUT) < -15V 1.5 - (VIN - VOUT) = -27V, TC = +25C 0.24 - - 1 % - 3 C/W PARAMETER Load Regulation 2/ -3V < (VIN - VOUT) < -27V, VOUT 10mA < IOUT < IMAX, VOUT < -5V IOUT 10mA < IOUT < IMAX, VOUT > -5V Thermal Regulation IOUT = 1.5A, (VIN - VOUT) = -13.3V, 20ms Pulse, 20W, TC = +25C Ripple Rejection VOUT = -10V, f = 120Hz, CADJ = 10F Adjustment Pin Current IADJ Adjustment Pin Current Change IADJ Minimum Load Current 3/ IMIN Current Limit Long Term Stability 3/ Thermal Resistance (Junction to Case) 3/ IMAX VOUT TIME TA = +125C JC A mA A Notes: 1. Unless otherwise specified, these specifications apply for post radiation, (Vin - Vout) = 5V, Iout = 0.5A and -55C < Tc < +125C. 2. Regulation is measured at a constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Measurements taken at the output lead must be adjusted for lead resistance. 3. Not tested. Shall be guaranteed to the specified limits. SCD8661 Rev B 1/7/09 2 Aeroflex Plainview 60 50 40 Maximum Power Dissipation (Watts) 30 20 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 the regulator chip in the VRG8661. The graph above represents the achievable power before the chip shuts down. The line in the graph represents the maximum power dissipation of the VRG8661 This graph is based on the maximum junction temperature of 150C and a thermal resistance (JC) of 3C/W. VIN 1 VRG8661 2 VOUT R1 3 ADJ VREF = 1.25V, IADJ = 50A VOUT = -VREF (1+R2/R1) + (-IADJ x R2) R2 Adjustable Regulator FIGURE 3 - TYPICAL APPLICATIONS SCD8661 Rev B 1/7/09 3 Aeroflex Plainview 3 2 1 NOTE: Package & Lid are electrically isolated from signal pads. FIGURE 4 - PACKAGE OUTLINE -- SURFACE MOUNT SCD8661 Rev B 1/7/09 4 Aeroflex Plainview ORDERING INFORMATION MODEL DSCC SMD # SCREENING PACKAGE VRG8661-S - Military Temperature, -55C to +125C Screened in accordance with MIL-PRF-38534, Class K. SMD-0.5 Power Pkg VRG8661-7 - Commercial Flow, +25C testing only VRG8661-201-1S VRG8661-201-2S 5962-0920602KXC 5962-0920602KXA In accordance with DSCC SMD 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 RH137 are a copyright of Linear Technology Corporation. SCD8661 Rev B 1/7/09 5