PD-97024A IRUH50PA23B1M Ultra Low Dropout Positive Adjustable Linear Regulator Product Summary +5.0Vin at 3.0A Part Number Dropout IO Vin Vout IRUH50PA23B1M 0.4V 3.0A 5.0V 1.265V To (VIN - 0.4V) MO-078AA Features: The IRUH50PA23B1M is a space qualified, ultra low dropout linear regulator designed specifically for space applications. This product has been characterized to a total ionizing dose of 1.0Mrad(Si) per MIL-STD-883, Method 1019 at both high and low dose rates under biased and unbiased conditions to account for ELDRS effects in bipolar devices. The ultra low dropout voltage of 0.4V @ 3A makes the part particularly useful for applications requiring low noise and higher efficiency. n n n n n n n n Total dose to 1.0Mrad(Si) and low dose capability to 500 Krad(Si) allows use in space applications Single Event latchup Immune LET = 84 MeV/(mg/cm2) Fluency = 1 x 109 Ions/cm2 Low noise, higher efficiency Ultra low dropout voltage of 0.4V@ 3A out significantly reduces power consumption Remote shutdown permits power sequencing to be easily implemented Hermetic MO-078AA (TO-258AA) pack ensures higher reliability Space Level Screened This part is also available in 8-Lead Flat Pack Package as IRUH50PA23A1M Absolute Maximum Ratings Parameter Symbol Value Units IO 3.5 A VIN 7.0 Output Voltage Power Dissipation, TC = 25°C VOUT PTOT 1.265V To (VIN - 0.4V) 19 W Thermal Resistance, Junction to Case RTHJC 6.5 °C/W Operating Temperature Range TJ -55 to +125 Storage Temperature Range TS TL -65 to +150 Output Current Input Voltage Lead Temperature www.irf.com V °C 300 1 01/09/06 IRUH50PA23B1M Pre-Radiation Electrical Characteristics @TC = 25°C (Unless Otherwise Specified) Parameter Test Conditions Symbol Min. Typ. Max. VIN 4.5 - 6.5 4.5V ≤ VIN ≤ 5.5V, IO = 50mA VIN = 5.0V, 50mA ≤ IOUT ≤ 3.0A VREF VLINE VLOAD 1.252 -0.25 1.265 - 1.278 +0.25 VDROP ILATCH - 1.0 IO = 3.0A, VOUT = 2.5V VIN = 5.0V, Overcurrent Latchup -1.0 - 0.4 %/A V 3.0 65 - - dB 1.0 200 - 1.6 -0.1 - +0.1 Symbol Min. Typ. VIN 4.5 - 6.5 1.225 -0.5 1.265 - 1.305 +0.5 Input Voltage Range - Operating IO = 3.0A Reference Voltage Line Regulation Load Regulation Dropout Voltage Current Limit Ripple Rejection Shutdown Source Current Shutdown Pin Threshold Output Voltage at Shutdown F = 120Hz, IO = 50mA VSHDN = 5.0V ISHDN VIN = 5.0V VSHDN VIN = 5.0V, IO = 50mA, VSHDN = +5.0V VOUT (SHDN) Units V %/V A µA V Pre-Radiation Electrical Characteristics @TC = -55°C to +125°C Parameter Test Conditions Input Voltage Range - Operating IO = 3.0A Max. Units V Reference Voltage Line Regulation 4.5V ≤ VIN ≤ 5.5V, IO = 50mA VREF VLINE Load Regulation VIN = 5.0V, 50mA ≤ IOUT ≤ 3.0A VLOAD -2.0 - 2.0 Dropout Voltage IO = 3.0A, VOUT = 2.5V VDROP - - 0.4 ILATCH 3.0 - - A 65 - - dB µA Current Limit VIN = 5.0V, Overcurrent Latchup Ripple Rejection F = 120Hz, IO = 50mA Shutdown Source Current VSHDN = 5.0V ISHDN - 200 - Shutdown Pin Threshold VIN = 5.0V VSHDN 1.0 - 1.6 Output Voltage at Shutdown VIN = 5.0V, IO = 50mA, VSHDN = +5.0V VOUT (SHDN) -0.1 - +0.1 %/V %/A V V For notes, please refer to page 3 2 www.irf.com IRUH50PA23B1M Post-Radiation Electrical Characteristics @TC = 25°C (Unless Otherwise Specified) Parameter Test Conditions Line Regulation 4.5V ≤ VIN ≤ 5.5V, IO = 50mA Load Regulation Current Limit VIN = 5.0V, 50mA ≤ IOUT ≤ 3.0A Ripple Rejection Output Voltage at Shutdown VIN = 5.0V F = 120Hz, IO = 50mA Symbol Min. Typ. Max. Units VLINE VLOAD -0.5 - +0.5 %/V -2.0 3.0 - 2.0 - %/A A 40 - - dB -0.1 - +0.1 V IMAX VIN = 5.0V, IO = 50mA, VSHDN = +5.0V VOUT (SHDN) Notes for Electrical Characteristic Tables VShutdown ramp from 0.8V to 4.8V, output monitored for a 100mV drop below the nominal specification for Vout www.irf.com 3 IRUH50PA23B1M Pre-Radiation Characteristics OMR9601 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) Fig 1. Ripple Rejection Vs Frequency Radiation Performance Characteristics Test Conditions Min Typ Unit MIL-STD-883, Method 1019 Total Ionizing Dose (Gamma) Operating Bias applied during exposure Krads (Si) 1,000 Full Rated Load, Vin=5.0V Neutron Fluence MIL-STD-883, Method 1017 Single Event effects Heavy Ions (LET) SEU, SEL, SEGR, SEB Operating Bias applied during exposure 1.00E+09 84 1.00E+13 Neutrons/cm 2 2 MeV*cm /mg Full Rated Load, Vin=5.0V 4 www.irf.com IRUH50PA23B1M Vin Vout Vin ADJUST RESISTOR Vout R1 IRUH50PA23B1M 100uF 16V Tantalum SHDN 1.0uFX10 CeramicX7R GND Ground 1000uF 6.3V Low ESR Tantalum Vout = Vref X ( 1+ R1/1000 ) Fig 2. Typical Application Circuit Input Capacitance Recommended input capacitance for a generic application is a 100µF, 16V tantalum capacitor. However, the input capacitance is not critical to the stability of the regulator and is therefore application dependant. In designs with a clean bus voltage that is situated close to the input of the regulator, only a small ceramic capacitor will be needed to decouple high frequency noise. On the other hand , in designs with a noisy bus, a larger capacitor will be needed. Care should be taken to ensure that the input to the regulator is sufficiently free of noise and disturbances. Output Capacitance Like most ultra low dropout voltage regulators, IRUH50PA23B1M requires the use of output capacitors as part of the device frequency compensation. The device requires a minimum of 220µF tantalum to ensure stability. Many different types of capacitor are available and have widely varying characteristics. These capacitors differ in capacitor tolerance, equivalent series resistance (ESR), equivalent series inductance and capacitance temperature coefficient. The IRUH50PA23B1M frequency compensation optimizes frequency response with low ESR capacitors. In general, use capacitors with an ESR of less than 50mΩ for heavy load applications. High quality bypass capacitors must be also be used to limit the high frequency noise generated by the load. Multiple small ceramic capacitors are typically required to limit parasitic inductance (ESL) and ESR in the capacitors to acceptable levels. The upper limit of the capacitance is governed by the delayed over-current latch function of the regulator. The regulator has a protection circuit that will latch the device off in the event of a short circuit. However, since it is known that the regulator will draw a large in-rush current upon startup, the latch-off is delayed by about 10ms to allow the outout capacitors to charge to a steady state without shutting down. During this period, the regulator will have an output current at its maximum of around 5A typical. Therefore, the maximum output capacitance can be as high as 20,000µF without causing device to latch-off during start-up. www.irf.com 5 IRUH50PA23B1M Vout Vin Drive Shutdown Adjust G nd Ground Fig 3. Simplified Schematic Circuit Space Level Screening Requirements TEST/INSPECTION SCREENING LEVEL MIL-STD-883 SPACE METHOD Pre Seal Burn-In Optional 1030 Nondestructive Bond Pull 100% 2023 Internal Visual 100% 2017 Temperature Cycle 100% 1010 Constant Acceleration 100% 2001 Mechanical Shock 100% 2002 PIND 100% 2020 Pre Burn-In-Electrical 100% Burn-In 100% Final Electrical 100% Seal 100% 1014 Radiographic External Visual 100% 100% 2012 2009 1015 Note: International Rectifier doesnot currently have a DSCC certified Radiation Hardness Assurance Program 6 www.irf.com IRUH50PA23B1M Case Outline and Dimensions - MO-078AA Pin Assignment Pin # Pin Description 1 VIN 2 3 GND VOUT 4 5 SHUTDOWN ADJUST Notes: 1) All dimensions are in inches Part Numbering Nomenclature IR Linear Regulator Module U = Ultra Low Dropout Regulator Radiation Hardening U H 50 P A2 3 B 1M P Screening P = Unscreened, 25°C Electrical Test ( Not for Qual) K = Space Level Screening H = RAD Hardened or Tolerant RAD Level Input Voltage 1M = 1M Rads 50 = 5.0V Package Code Polarity B = MO-078AA P = Positive Output Voltage A2 = Adjustable 2.5V to 4.6V Maximum Output Current 3 = 3 Amp IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 IR LEOMINSTER : 205 Crawford St., Leominster, Massachusetts 01453, USA Tel: (978) 534-5776 TAC Fax: (310) 252-7903 Visit us at www.irf.com for sales contact information. Data and specifications subject to change without notice. 01/2006 www.irf.com 7