PD-94470A Ultra Low Dropout Positive Adjustable Linear Regulator Hermetic Package OM8505SC OM8505SF +5.0Vin / +4.1 to +5.1Vout at 3.0A Product Summary Part Number OM8505SC OM8505SF Dropout 0.4 V 0.4 V IO 3.0A 3.0A Vin Package 5.0V MO-078AA 5.0V 8-lead Flatpack MO-078AA Features: The OM8505 is an ultra low dropout adjustable linear regulator designed specifically for hi-rel applications. Housed in either a 5 pin through hole or 8 lead surface mount package, these regulators provide high reliability in military/defense applications. The ultra low dropout voltage of 0.4V @ 3A makes the part particularly useful for applications requiring low noise and higher efficiency. n Ultra low dropout voltage of 0.4 volt significantly reduces power consumption n Low noise, higher efficiency n Remote shutdown permits power sequencing to be easily implemented n Hermetic MO-078AA (TO-258AA) and 8- lead flat pack ensure higher reliability n Available H-level screened Absolute Maximum Ratings Symbol Parameter Value Units 3.5 +7.0 +4.1 to +5 A V V Io V in Vout Output Current Input Voltage Output Voltage Range PTOT Power Dissipation TC=25 o C 19 W Thermal Resistance, Junction to Case (MO-078AA) Thermal Resistance, Junction to Case (8-lead flatpack) 6.5 6.5 °C/W Operating Junction -55 to +125 oC Storage Temperature Range -65 to +150 oC 300 oC RTHJC RTHJC TJ TSTG TL www.irf.com Lead Temperature °C/W 1 8/20/02 OM8505SC, OM8505SF Electrical Characteristics @ TA= 25°C (Unless Otherwise Specified) Parameter Input Voltage RangeOperating Reference Voltage Line Regulation Conditions Io= 3.0A Load Regulation Dropout Voltage Current Limit Ripple Rejection Shutdown source current Shutdown Pin Threshold Output Voltage at Shutdown 4.75 ≤ Vin ≤ 5.25, Io= 3.0A 4.5 ≤ Vin ≤ 5.5, Io= 50mA Vin= 5.0V 10ma ≤ Iout ≤ 3.0A Io= 3.0A. Vin= 5.0V Vin= 5.0V, Overcurrent Latchup F= 120 Hz., Vout= Vref Vshdn= 5V Isource= 200uA Vin= 5.0V, Io= 50mA, Shdn= +5.0V Symbol Min. 4.5 Typ. Max 6.5 Unit V Vref Vline 1.265 Vload 1.252 -100 -5 -20 1.305 +100 +5 +20 V mV mV mV Vdrop Ilatch 0.4 3.0 V A 65 Ishdn Vshdn Vout (shdn) 1.6 +0.1 dB uA V V 200 1.0 -0.1 Electrical Characteristics TA = -55 to +125°C Parameter Input Voltage RangeOperating Reference Voltage Line Regulation Conditions Io= 3.0A Load Regulation Dropout Voltage Current Limit Ripple Rejection Shutdown Source Current Shutdown Pin Threshold Output Voltage at Shutdown 4.75 ≤ Vin ≤ 5.25, Io= 3.0A 4.5 ≤ Vin ≤ 5.5, Io= 50mA Vin= 5.0V 10ma ≤ Iout ≤ 3.0A Io= 3.0A. Vin= 5.0V Vin= 5.0V, Overcurrent Latchup F= 120 Hz., Vout= Vref Vshdn= 5V Isource= 200uA Vin= 5.0V, Io= 50mA, Shdn= +5.0V Symbol Min. 4.5 Typ. Max 6.5 Unit V Vref Vline 1.265 Vload 1.225 -150 -150 -150 1.305 +150 +150 +150 V mV mV mV Vdrop Ilatch 0.4 3.0 V A 65 Ishdn Vshdn Vout (shdn) 200 1.0 -0.1 1.6 +0.1 dB uA V V Simplified Schematic Vout Vin Drive Shutdown 2 Gnd Adjust Ground www.irf.com OM8505SC, OM8505SF OM8505 Ripple Rejection vs. Frequency 3A 120 1.5A 100 .75A .50A (db) 80 60 40 20 0 100 1,000 10,000 100,000 1,000,000 Frequency (Hz) Adjust Resistor Vout Vin OM8505 R1 100uF 16V Tantalum 220uF 6.3V SHDN ADJ GND 1.0uF Tantalum Ceramic X7R Vout = Vref x (1+R1/1000) In order to maintain regulation and stability specified additional input and output bulk capacitors are recommended. Capacitors recommended above should be low ESR tantalums with tolerances of +/20% max. Internal to the product are a 4.7uF input capacitor and a 4.7uF output capacitor in parallel with a 0.33uF ceramic capacitor. www.irf.com Shutdown: The regulator can be shutdown by applying a voltage >1.6V to pin 4. The regulator will restart when the SHDN pin is pulled below the shutdown threshold of 1.0V. If remote shutdown is not required, pin 4 shold be connected to GND to insure a safe “off” state. 3 OM8505SC, OM8505SF Mechanical Outline MO-078AA Base: GLIDCOP Pins: Copper core, Alloy 52 Seals: Glass Base Pin Connections Terminal Description 1 Vin 2 GND 3 Vout 4 Shutdown 5 Adjust 1 2 3 4 5 Mechanical Outline 8-Lead Flat Pack Base: 1010-1018 C.R.S. Pins: #52 Alloy, Copper Cored Seals: Glass – 9013 or Equiv. Finish: 100-250 Microinches Electroless Nickel Over 50-250 Microinches Electrolytic Nickel. Pin Connections Terminal Description 1,2 GND 3 Shutdown 4 Adjust 5,6 Vout 7,8 Vin 4 0.755 0.745 8X 0.080 0.070 8 7 6 5 0.755 0.745 1 2 3 4 8x 0.040 0.065 0.110 0.150 0.040 0.065 0.105 0.225 0.305 0.295 0.095 0.180 0.165 8X 0.020 0.016 www.irf.com OM8505SC, OM8505SF Part Number Nomenclature OM 8505 Omnirel Device Part Number OM8505SCP OM8505SCH OM8505SFP OM8505SFH X X X S=Isolated Package N=Non-Isolated Package Description MO-078AA 5 - Lead MO-078AA 5 - Lead 8 -Lead Flat Pack 8 -Lead Flat Pack Screening Screening 100% Final Electrical Class H per MIL-PRF-38534 100% Final Electrical Class H per MIL-PRF-38534 MIL-PRF-38534 Screening Requirements TEST/INSPECTION SCREENING LEVEL MIL-STD-883 Class H Method Pre Seal Burn-In Nondestructive Bond Pull Internal Visual Temperature Cycle Constant Acceleration Mechanical Shock PIND Pre Burn-In Electrical Burn-In Final Electrical Seal Radiographic External Visual Optional N/A 100% 100% 100% 100% N/A Optional 100% 100% 100% N/A 100% 1030 2023 2017 1010 2001 2002 2020 1015 1014 2012 2009 WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 2527105 IR LEOMINSTER: 205 Crawford St., Leominster, Massachusetts 01453, Tel: (978) 5345776 Data and specifications subject to change without notice. 8/2002 www.irf.com 5