IRUH50PA23B20

PD-97030 Ultra Low Dropout Positive Adjustable Linear Regulator Product Summary Part Number IRUH50PA23B20 IRUH50PA23B20 +5.0Vin at 3.0A Dropout 0.4V IO 3.0A Vin 5.0V Vout 1.265V To (VIN - 0.4V) MO-078AA Features: The IRUH50PA23B20 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 200Krad(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 Total dose to 200 Krad(Si) and low dose capability to 200 Krad(Si) allows use in space applications 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 Absolute Maximum Ratings Parameter Output Current Input Voltage Output Voltage Power Dissipation, TC = 25°C Thermal Resistance, Junction to Case Operating Temperature Range Storage Temperature Range Lead Temperature Symbol IO VIN VOUT PTOT RTHJC TJ TS TL Value 3.5 7.0 1.265V To (VIN - 0.4V) 19 6.5 -55 to +125 -65 to +150 300 Units A V W °C/W °C www.irf.com 1 04/08/08 IRUH50PA23B20 Pre-Radiation Electrical Characteristics @TC = 25°C (Unless Otherwise Specified) Parameter 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 4.5V ≤ VIN ≤ 5.5V, IO = 50mA VIN = 5.0V, 50mA ≤ IOUT ≤ 3.0A IO = 3.0A, VOUT = 2.5V VIN = 3.3V, Overcurrent Latchup F = 120Hz, IO = 50mA VSHDN = 5.0V ISOURCE = 200µA Test Conditions Symbol VIN VREF VLINE VLOAD VDROP ILATCH ISHDN VSHDN Min. 4.5 1.252 -0.25 -1.0 3.0 65 1.0 -0.1 Typ. 1.265 200 - Max. 6.5 1.278 +0.25 1.0 0.4 1.6 +0.1 Units V %/V %/A V A dB µA V VIN = 5.0V, IO = 50mA, VSHDN = +5.0V VOUT (SHDN) Pre-Radiation Electrical Characteristics @TC = -55°C to +125°C Parameter 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 4.5V ≤ VIN ≤ 5.5V, IO = 50mA VIN = 5.0V, 50mA ≤ IOUT ≤ 3.0A IO = 3.0A, VOUT = 2.5V VIN = 5.0V, Overcurrent Latchup F = 120Hz, IO = 50mA VSHDN = 5.0V ISOURCE = 200µA Test Conditions Symbol VIN VREF VLINE VLOAD VDROP ILATCH ISHDN VSHDN Min. 4.5 1.225 -0.5 -2.0 3.0 65 1.0 -0.1 Typ. 1.265 200 - Max. 6.5 1.305 +0.5 2.0 0.4 1.6 +0.1 Units V %/V %/A V A dB µA V VIN = 5.0V, IO = 50mA, VSHDN = +5.0V VOUT (SHDN) For notes, please refer to page 3 2 www.irf.com IRUH50PA23B20 Post-Radiation Electrical Characteristics @TC = 25°C (Unless Otherwise Specified) Parameter Line Regulation Load Regulation Current Limit Ripple Rejection Output Voltage at Shutdown Test Conditions 4.5V ≤ VIN ≤ 5.5V, IO = 50mA VIN = 5.0V, 50mA ≤ IOUT ≤ 3.0A VIN = 5.0V F = 120Hz, IO = 50mA Symbol VLINE VLOAD IMAX Min. -0.5 -2.0 3.0 40 -0.1 Typ. - Max. +0.5 2.0 +0.1 Units %/V %/A A dB V 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 IRUH50PA23B20 Pre-Radiation Characteristics OMR9601 Ripple Rejection vs. Frequency 120 100 80 (db) 60 40 20 0 100 3A 1.5A .75A .50A 1,000 10,000 Frequency (Hz) 100,000 1,000,000 Fig 1. Ripple Rejection Vs Frequency Post-Radiation Testing and Characterization is in process Radiation Performance Characteristics Test Total Ionizing Dose (Gamma) Conditions MIL-STD-883, Method 1019 Operating Bias applied during exposure Full Rated Load, Vin=5.0V Min 200 Ty p Unit Krads (Si) Neutron Fluence Single Event effects SEU, SEL, SEGR, SEB MIL-STD-883, Method 1017 Heavy Ions (LET) Operating Bias applied during exposure Full Rated Load, Vin=5.0V 1.00E+09 1.00E+13 Neutrons/cm 2 84 MeV*cm /mg 2 4 www.irf.com IRUH50PA23B20 ADJUST RESISTOR R1 Vin Vin Vout Vout IRUH50PA23B20 100uF 16V Tantalum SHDN GND 1.0uFX10 CeramicX7R 1000uF 6.3V Low ESR Tantalum Ground 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, IRUH50PA23B20 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 IRUH50PA23B20 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 IRUH50PA23B20 Vin Drive Vout Adjust Ground Shutdown G nd Fig 3. Simplified Schematic Circuit Space Leval Screening Requirements TEST/INSPECTION SCREENING LEVEL SPACE 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 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 1014 2012 2009 1015 MIL-STD-883 METHOD 1030 2023 2017 1010 2001 2002 2020 Note: International Rectifier currently doesnot have a DSCC certified Radiation Hardness Assurance Program 6 www.irf.com IRUH50PA23B20 Case Outline and Dimensions - MO-078AA Pin Assignment Pin # 1 2 3 4 5 Pin Description VIN GND VOUT SHUTDOWN ADJUST Notes: 1) All dimensions are in inches Part Numbering Nomenclature IR Linear Regulator Module U = Ultra Low Dropout Regulator U H 50 P A2 3 B 20 P Screening P = Unscreened, 25°C Electrical Test ( Not for Qual) K = Space Level Screening Radiation Hardening H = RAD Hardened or Tolerant RAD Level 20 = 200KRads Input Voltage 50 = 5V Polarity P = Positive Package Code B = MO-078AA 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. 04/2008 www.irf.com 7