Standard Products VRG8663 Low Drop Out(LDO)Adjustable Regulator Negative Voltage Radiation Tolerant www.aeroflex.com/voltreg April 2, 2010 FEATURES Manufactured using Linear Technology Corporation (R) Space Qualified RH1185 die Radiation performance - Total dose: 100 krads(Si), Dose rate = 50 - 300 rads(Si)/s Thermal shutdown Output voltage adjustable: -2.37 to -25V Dropout voltage: 1.05V at 3.0Amps 5-Terminal Output current: 3A Voltage reference: -2.370V 3% Load regulation: 0.8% max Line regulation: 0.02% max Ripple rejection: >60dB Packaging - Hermetic Surface Mount Power Package - 5 Pads, .301"W x .550"L x .130"Ht max - Weight - 1.2 gm max Designed for aerospace and high reliability space applications Available on DSCC SMD 5962-09207 Note: Aeroflex Plainview does not currently have a DSCC certified Radiation Hardened Assurance Program. DESCRIPTION The Aeroflex Plainview VRG8663 consists of a Negative Adjustable (RH1185) LDO voltage regulator capable of supplying 3.0Amps over the output voltage range as defined under recommended operating conditions. The VRG8663 offers excellent line and load regulation specifications and ripple rejection. Dropout (VIN - VOUT) decreases at lower load currents. The VRG8663 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 VRG8663 has been specifically designed to meet exposure to radiation environments and is configured for a SMD power package. It is guaranteed operational from -55C to +125C. Available screened to MIL-STD-883, the VRG8663 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/LT1185, which is available on-line at www.linear.com. 3 VOUT VIN 5 Reference 2 Feedback 1 RH1185 GND 4 FIGURE 1 - BLOCK DIAGRAM / SCHEMATIC SCD8663 Rev E ABSOLUTE MAXIMUM RATINGS PARAMETER RANGE UNITS Input Voltage -35 VDC Lead temperature (soldering 10 Sec) 300 C Input Output Differential 30 VDC Feedback & Reference Voltage -7 VDC Output Voltage -30 VDC 2000 1/ V 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 1. 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 -2.45 to -25 VDC 1 to 28 VDC -55 to +125 C Input Output Differential Case Operating Temperature Range ELECTRICAL PERFORMANCE CHARACTERISTICS Unless otherwise specified, -55C < Tc < +125C. PARAMETER SYM Reference Voltage (At pin 6) 2/ 7/ Dropout Voltage Line Regulation Load Regulation MIN MAX UNITS -2.29 -2.45 V IOUT = 0.5A, VOUT = -5V - 0.425 V IOUT = 3A, VOUT = -5V - 1.05 V VOUT 1.0V < VIN - VOUT < 20V, VOUT = -5V VIN - 0.02 %/V VOUT 5mA < IOUT < 3A, VIN - VOUT = 1.5V to 10V, VOUT = -5V IOUT - 0.8 % - -4.50 V 1.5V < VIN - VOUT < 10V 3.3 4.55 A VIN - VOUT = 15V 2.0 4.5 A VIN - VOUT = 20V 1.0 3.1 A VIN - VOUT = 28V /3 0.2 1.6 A RLIM = 5K 10/ 2.7 3.7 A RLIM = 15K 10/ 0.9 1.75 A VREF 2/ 4/ 2/ 8/ 2/ 8/ CONDITIONS (P PMAX 1mA < IOUT < 3A, VIN - VOUT = 1.2V to 28V, VOUT = -5V VDROP Minimum Input Voltage 2/ 5/ VIN MIN IOUT = 3A , VOUT = VREF Internal Current Limit (See Figure 4) 2/ 11/ External Current Limit 2/ ICL ILIM See footnotes at top of next page. SCD8663 Rev E 4/2/10 2 Aeroflex Plainview ELECTRICAL PERFORMANCE CHARACTERISTICS Unless otherwise specified, -55C < Tc < +125C. PARAMETER SYM Quiescent Supply Current 2/ 6/ IQ Supply Current Change with Load 2/ IQ CONDITIONS (P PMAX MIN MAX UNITS IOUT = 5mA, VOUT = VREF, -4V < VIN < -25V - 3.5 mA VIN - VOUT = VSAT - 35 mA/A - 21 mA/A 60 - dB - 0.014 %/W - 3 C/W 9/ VIN - VOUT 2V Ripple Rejection - IOUT = 1.0A, VIN - VOUT = 3V, f = 120Hz, Thermal Regulation (See application info LT1185) 3/ - VIN -VOUT = 10V, IOUT = 5mA to 2A, TC = +25C Thermal Resistance (Junction to Case) JC Notes: 1/ Meets ESD testing per MIL-STD-883, method 3015, Class 2. 2/ Specifications derated to reflect Total Dose exposure to 100Krad (Si) @ +25C. 3/ Not tested. Shall be guaranteed by design, characterization, or correlation to other tested parameters. 4/ Dropout voltage is tested by reducing input voltage until the output drops 1% below its nominal value. Tests are done at 0.5A and 3A. The power transistor looks basically like a pure resistance in this range so that minimum differential at any intermediate current can be calculated by interpolation; VDROPOUT = 0.25V + (0.25 x IOUT). For load current less than 0.5A, see Figure 3. 5/ "Minimum input voltage" is limited by base emitter voltage drive of the power transistor section, not saturation as measured in Note 4. For output voltages below 4V, "minimum input voltage" specification may limit dropout voltage before transistor saturation limitation. 6/ Supply current is measured on the ground pin, and does not include load current, RLIM, or output divider current. 7/ The 25W power level is guaranteed for an input-output voltage of 8.3V to 17V. At lower voltages the 3Amp limit applies, and at higher voltages the internal power limiting may restrict regulator power below 25W. 8/ Line and load regulation are measured on a pulse basis with a pulse width of 2ms, to minimize heating. DC regulation will be affected by thermal regulation and temperature coefficient of the reference. 9/ VSAT is the maximum specified dropout voltage: 0.25V + (0.25 x IOUT). 10/ Current limit is programmed with a resistor from REF pin to GND pin. RLIM = 15K/ILIM. 11/ Pulsed @<10% duty cycle @25C. SCD8663 Rev E 4/2/10 3 Aeroflex Plainview 60 50 Maximum Power Dissipation (Watts) 40 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 VRG8663. The graph above represents the achievable power before the chip shuts down. The line in the graph represents the maximum power dissipation of the VRG8663 This graph is based on the maximum junction temperature of 150C and a thermal resistance (JC) of 3C/W. FIGURE 3 - RH1185 DROPOUT VOLTAGE TYPICAL CURVE SCD8663 Rev E 4/2/10 FIGURE 4 - RH1185 INTERNAL CURRENT LIMIT 4 Aeroflex Plainview + The RH1185 output voltage is set by two external resistors. The internal reference voltage is trimmed to 2.37V so that a standard 1% 2.37k resistor (R1) can be used to set divider current at 1mA. R2 is then selected from: + C1 VIN (VOUT - 2.37) R1 R2 = VREF for R1 = 2.37k and VREF = 2.37V, this reduces to: 5 - R2 = VOUT - 2.37 R2 when R1 = 2.37k 2.5V 3.3V 5V 12V 15V 130 930 2.67k 9.76k 12.7k SETTING OUTPUT VOLTAGE ra RLIM + 2 4 R2 GND 1 FB - rb + IGND C2 R1* 2.37k Load VOUT R2 VRG8663 VIN (RH1185) VOUT suggested values of 1% resistors are shown below: VOUT + Parasitic Lead Resistance 3 - *R1 should be connected directly to ground lead, not to the load, so that ra = 0. This limits the output voltage error to (IGND)(rb). Errors created by ra are multiplied by (1 + R2/R1). Note that VOUT increases with increasing ground pin current. R2 should be connected directly to load for remote sensing. C1 = C2 2F Tantalum. R1 & R2 LOCATION & PROPER CONNECTION OF POSITIVE SENSE LEAD FIGURE 5 - BASIC VRG8663 ADJUSTABLE REGULATOR APPLICATION SCD8663 Rev E 4/2/10 5 Aeroflex Plainview .301 MAX PAD 1 .095 4 Places R.025 MAX 6 Places .030 MIN 4 1 .005 .120 4 Places .030 MIN .550 MAX 5 .200 .005 .030 MIN 3 2 .150 4X R.020 .015 3 Places .127 MAX .005 .005 .286 NOTE 1. Package & Lid are electrically isolated from signal pads. FIGURE 6 - PACKAGE OUTLINE -- SURFACE MOUNT SCD8663 Rev E 4/2/10 6 Aeroflex Plainview ORDERING INFORMATION MODEL DSCC SMD # SCREENING VRG8663-S - Military Temperature, -55C to +125C Screened in accordance with MIL-PRF-38534, Class K. VRG8663-7 - Commercial Flow, +25C testing only 5962-0920702KYC 5962-0920702KYA In accordance with DSCC SMD VRG8663-201-1S VRG8663-201-2S PACKAGE SMD Power Pkg 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 RH1185 are a copyright of Linear Technology Corporation. SCD8663 Rev E 4/2/10 7