IRUH3301A2AK

PD-97534A IRUH3301A2AK Radiation Hardended Ultra Low Dropout IRUH3301A2AP Adjustable Positive Linear Regulator +5.0VIN to VADJ @3.0A Product Summary Part Number IRUH3301A2AK IRUH3301A2AP Dropout 0.4V IO 3.0A VIN 5.0V VOUT ADJ 8-LEAD FLAT PACK Description The IRUH3301A2 is a space qualified, ultra low dropout linear regulator designed specifically for applications requiring high reliability, low noise and radiation hardness. The output voltage can be adjusted to a low 0.8V with a droput voltage of 400mV at the full rated current of 3.0 Amps. Features n Silicon On Insulator (SOI) CMOS Regulator n n n n n n n n n n n Absolute Maximum Ratings Parameter Power Dissipation @ TC = 125°C Maximum Output Current @ Maximum Power Dissipation with no Derating Non-Operating Input Voltage Operating Input Voltage Ground Shutdown Pin Voltage Output Pin Voltage Operating Case Temperature Range Storage Temperature Range Maximmum Junction Temperature Lead Temperature (Soldering 10sec) Pass Transistor Thermal Resistance, Junction to Case PD IO VIN VIN IC, CMOS Latch-Up Immune, Inherently Rad Hard Total Dose Capability up to 300Krads(Si) (Condition A); Tested to 500Krad (Si) ELDRS up to 100Krad(Si) (Condition D) SEU Immune up to LET = 80 MeV*cm2/mg Space Level Screened Fast Transient Response Timed Latch-Off Over-Current Protection Internal Thermal Protection Adjustable Output as low as 0.8V On/Off Control via Shutdown Pin, Power Sequencing Easily Implemented Isolated Hermetic 8-Lead Flat Pack Ensures Higher Reliability This part is also available in MO-078 Package as IRUH3301A2BK / IRUH3301A2BP Symbol Min. -0.3 2.9 -0.3 -0.3 -0.3 -55 -65 - Max. 25 See Fig 4 +8.0 6.4 0.3 VIN + 0.3 VIN + 0.3 +140 +150 +150 +300 1.0 Units W A GND VSHDN VOUT TO TS TJ TL RTHJC V °C °C/W www.irf.com 1 08/02/10 IRUH3301A2AK IRUH3301A2AP Electrical Characteristics c Pre-Radiation @TC = 25°C, VIN = 5.0V (Unless Otherwise Specified) Parameter Test Conditions 3.8V ≤ VIN ≤ 5.8V, 50mA ≤ IOUT ≤ 3.0A 3.8V ≤ VIN ≤ 5.8V, 50mA ≤ IOUT ≤ 3.0A, Reference Voltage (Measured @ ADJ Pin) -55°C to +125°C 3.8V ≤ VIN ≤ 5.8V, 50mA ≤ IOUT ≤ 3.0A, Post -Rad IO = 3.0A, VOUT = 4.4V, -55°C to +125°C, Post -Rad Over-Current Latching, -55°C to +125°C, Post -Rad IO > ILATCH F= 120Hz, IO = 50mA, -55°C to +125°C F= 120Hz, IO = 50mA, Post -Rad -55°C to +125°C -55°C to +125°C ISOURCE = 200µA, -55°C to +125°C Post -Rad ISOURCE = 200µA, -55°C to +125°C Post -Rad RLOAD = 36 Ohms, VSHDN = 3.3V VOUT Symbol Min. 0.788 0.768 0.780 Typ. Max. Units 0.800 0.812 0.800 0.832 0.800 0.816 10 140 -0.025 1.6 1.7 0.4 0.8 0.1 10 -56 -30 -56 15 90 V mA µA V A ms °C dB % / °C mA V V V µA V Dropout Voltage Current Limit ™ VDROP ILATCH tLATCH TLATCH PSRR VOUT_TEMPCO IADJUST VSHDN VSHDN VOUT ISHDN ISHDN VT-POR IQ 3.5 125 65 40 1.2 -0.1 -10 -98 -140 -98 - Over-Current Time-to-Latch Maximum Shutdown Temp. Ripple Rejection d d dà ADJ Pin Current d Output Voltage Threshold Voltage Threshold Voltage Temp. Coefficient of Minimum SHDN Pin "On" Maximum SHDN Pin "Off" Output Voltage at Shutdown SHDN Pin Leakage Current SHDN Pin Pull-Up Current d d -55°C to +125°C, Post-Rad VSHDN = 3.3V, -55°C to +125°C,Post-Rad VSHDN = 0.4V VSHDN = 0.4V, -55°C to +125°C VSHDN = 0.4V, Post-Rad Sweep VIN and Measure Output No Load Full Load d Power On Reset Threshold Quiescent Current d Notes:  Connected as shown in Fig.1 and measured at the junction of VOUT and ADJ Pins. ‚ Under normal closed-loop operation. Guaranteed by design. Not tested in production. 2 www.irf.com IRUH3301A2AK IRUH3301A2AP Radiation Performance Characteristics Test Total Ionizing Dose (Gamma) Conditions MIL-STD-883, Method 1019 (Condition A) Operating Bias applied during exposure Minimum Rated Load, Vin = 6.4V MIL-STD-883, Method 1019 (Condition D) Min 300 Typ 500 Unit Krads (Si) c d Total Ionizing Dose (Gamma) Single Event effects SEU, SEL, SEGR, SEB (ELDRS) Operating Bias applied during exposure Minimum Rated Load, Vin = 6.4V Heavy Ions (LET) Operating Bias applied during exposure under varying operating conditions 100 See Krads (Si) 84 MeV*cm /mg 2 Neutron Fluence MIL-STD-883, Method 1017 1.0e 11 Neutrons/cm 2 Notes:  Tested to 500Krad (Si). ‚ See Fig. 5. Space Level Screening Requirements TEST/INSPECTION SCREENING LEVEL SPACE Nondestructive Bond Pull Internal Visual Seal Temperature Cycle Constant Acceleration Mechanical Shock PIND Pre Burn-In-Electrical Burn-In Final Electrical Radiographic External Visual 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 2012 2009 1015 MIL-STD-883 METHOD 2023 2017 1014 1010 2001 2002 2020 Notes: International Rectifier does not currently have a DSCC certified Radation Hardness Assurance Program. www.irf.com 3 IRUH3301A2AK IRUH3301A2AP Application Information Input Voltage 0.1uF and 1uF Ceramic; Two 100uF Low ESR Tantalum VIN VOUT R1 IRUH3301Axxx SHDN GND ADJ Output Voltage 0.1uF and 1uF Ceramic; Two 100uF Low ESR Tantalum Fig. 1. Typical Regulator Circuit; Note the SHDN Pin is hardwired in the “ON” position. The ADJ Pin is connected as noted in the “General Layout Rules” section. Setting the Output Voltage Choose R1 based upon the desired output voltage using the formula below. Table 1 shows the closest nominal 0.1% tolerance R1 value to provide a given output voltage. Table 1- Values of R1 for a Given Output Voltage VOUT (V) Nearest R1 Value (0.1%), (Ohms) 0.9 61.9 1.0 124 1.2 249 1.5 437 1.8 619 2.5 1060 3.3 1560 ⎛V ⎞ R1 = ⎜ OUT − 1⎟ * 499Ω ⎝ 0.800V ⎠ Over-Current & Over-Temperature Protection The IRUH3301 series provides over-current protection by means of a timed latch function. Drive current to the internal PNP pass transistor is limited by an internal resistor (Rb in Fig. 3) between the base of the transistor and the control IC drive FET. If an over-current condition forces the voltage across this resistor to exceed 0.5V (nom), the latch feature will be triggered. The time-tolatch (tLATCH) is nominally 10ms. If the over-current condition exists for less than tLATCH , the latch will not be set. If the latch is set the drive current to the PNP pass transistor will be disabled. The latch will remain set until one of the following actions occur: 1. The SHDN Pin voltage is brought above 1.2V and then lowered below 0.8V. 2. The VIN Pin voltage is lowered below 1.7V. If the junction temperature of the regulator IC exceeds 140°C nominal, the thermal shutdown circuit will set the internal latch and disable the drive current to the PNP pass transistor as described above. After the junction temperature falls below a nominal 125°C, the latch can be reset using either of the actions described above. Under-Voltage Lock-Out The under-voltage lock-out (UVLO) function prevents operation when VIN is less than 1.7V (nominal). There is a nominal 100mV hysteresis about this point. Input Voltage Range The device control functions fully when VIN is greater than 2.9V. The output current may need to be reduced to avoid the activation of over current protection at 2.9V < VIN < 3.8V. The IRUH3301A1 is recommended for performance optimization when 2.9V < VIN < 3.8V is required. The device enters into under-voltage lock-out when VIN < 1.7V (nominal). When 1.7V (nominal) < VIN < 2.9V, VOUT will track VIN and overshoot may occur. A larger output capacitor should be used to slow down the VOUT rise rate for slow VIN ramp applications. 4 www.irf.com IRUH3301A2AK IRUH3301A2AP Shutdown (SHDN) The regulator can be shutdown by applying a voltage of >1.2V to the SHDN Pin. The regulator will restart when the SHDN Pin is pulled below the shutdown threshold of 0.8V. If the remote shutdown feature is not required, the SHDN Pin should be connected to GND. Input Capacitance Input bypass capacitors: Two (0.1µF and 1µF) ceramics and two 100µF low ESR tantalums (AVX TPS or equivalent), placed very close to the VIN Pin are required for proper operation. When the input voltage supply capacitance is more than 4 inches from the device, additional input capacitance is recommended. Larger input capacitor values will improve ripple rejection further improving the integrity of the output voltage. Output Capacitance Output bypass capacitors: Two (0.1µF and 1µF) ceramics and two 100µF low ESR tantalums (AVX TPS or equivalent) are required for loop stability. Faster transient performance can be achieved with multiple additional 1µF ceramic capacitors. Ceramic capacitors greater than 1µF in value are not recommended as they can cause stability issues. Tantalum capacitor values larger than the suggested value are recommended to improve the transient response under large load current changes. The upper capacitance value limit is governed by the delayed over-current latch function of the regulator and can be as much as 10,000µF without causing the device to latch-off during start-up. General Layout Rules Low impedance connections between the regulator output and load are essential. Solid power and ground planes are highly recommended. In those cases where the board impedances are not kept very small, oscillations can occur due to the effect of parasitic series resistance and inductance on loop bandwidth and phase margin. R1 must be directly conected to the VOUT Pin using as short a trace as possible with the connection inside the first bypass capacitor (see Fig. 2a). The trace from ADJ Pin to R1 should be as short as possible. Connect ceramic output capacitors directly across the VOUT and GND Pins with as wide a trace as design rules allow (see Fig. 2a). Avoid the use of vias for these capacitors and avoid loops. Fig.2 shows the ceramic capacitors tied directly to the regulator output. The input capacitors should be connected as close a possible to the VIN Pin. Fig. 2a. Layer 1 conductor. Ground plane below layer 1 Fig. 2b. Layer 1 silkscreen 5 www.irf.com IRUH3301A2AK IRUH3301A2AP VOut 0.500% Delta-VOut (%) 0.250% 0.000% -0.250% -0.500% 1 10 100 1000 10000 100000 Total Dose (Rad (Si)) ELDRS TID Fig. 5. Change in Output Voltage vs. Total Ionizing Dose Radiation Exposure at Both High and Low Dose Rates PSRR (Typical) 105 95 85 75 PSRR (dB) 65 55 45 35 25 15 5 -5 0.1 1 10 100 1000 10000 Freq (KHz) Recomended Layout and Capcitors, No IRUH Iout=100mA & 1.6A, 3.3Vout, 4.8Vin Fig. 6. Typical Power Supply Ripple Rejection at 100mA and 1.6A using recommended layout and capacitors. Results above 10KHz are influenced by testing setup and layout. 6 www.irf.com IRUH3301A2AK IRUH3301A2AP Fig 7. Case Outline and Dimensions - 8-Lead Flat Pack (Lead Form Down) Pin Assignment Pin # 1 2 3 4 5 6 7 8 Pin Description GND GND SHUTDOWN VADJ VOUT VOUT VIN VIN Note: 1) All dimensions are in inches Warning: This Product contains BeO Fig 8. Case Outline and Dimensions - 8-Lead Flat Pack (Lead Trimmed) Pin Assignment Pin # 1 2 3 4 5 6 7 8 Pin Description GND GND SHUTDOWN VADJ VOUT VOUT VIN VIN Note: 1) All dimensions are in inches Warning: This Product contains BeO www.irf.com 7 IRUH3301A2AK IRUH3301A2AP Part Numbering Nomenclature IR U H3 301 A2 A K Linear Regulator U = Ultra Low Dropout Regulator Lead Form Options Blank = Lead Form Down (Fig. 7) B = Lead Form Up C = Lead Trimmed (Fig. 8) Radiation Hardening Blank = No Rad Tolerance H3 = 300 Krads Screening Level P = Unscreened. 25 deg C Electrical Test Not for Qualification H = Class H per MIL-PRF-38534 K = Class K per MIL-PRF-38534 Device indicator 301 = 3 Amp Positive Regulator Output Voltage 18 = 1.8V 25 = 2.5V 33 = 3.3V A1 = Adjustable Optimized for 3.3 V Input A2 = Adjustable Optimized for 5.0V Input Package Type A = 8 Lead Flat Pack 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. 08/2010 8 www.irf.com