ISO-9001 CERTIFIED BY DSCC 5175 VERY HIGH CURRENT, LOW DROPOUT VOLTAGE REGULATORS M.S.KENNEDY CORP. SERIES 4707 Dey Road Liverpool, N.Y. 13088 (315) 701-6751 FEATURES: MIL-PRF-38534 QUALIFIED Electrically Isolated Top Tab or Z Tab SIP Extremely Low Dropout Voltage: 425mV @ 7.5 Amps Available in 3.3V, 5.0V, 12.0V and Adjustable Versions Open Collector Error Flag Output TTL Level Enable Pin: Zero Current Shutdown Mode Reverse Battery and Load Dump Protection Low Ground Current: 120mA Typical at Full Load 1% Maximum Guaranteed Accuracy Output Current to 7.5 Amps DESCRIPTION: The MSK 5175 series voltage regulators are available in +3.3V, +5.0V, +12.0V or adjustable output configurations. All boast ultra low dropout specifications due to the utilization of a super PNP output pass transistor with monolithic technology. Dropout voltages of 425mV at 7.5 amps are typical in this configuration, which drives efficiency up and power dissipation down. Accuracy is guaranteed with a 1% maximum output voltage tolerance. The series also offers a TTL/CMOS compatible on/off enable function as well as an output flag pin. The MSK 5175 series is packaged in a space efficient 5 pin power SIP available in two styles with three lead bend options. EQUIVALENT SCHEMATIC Schematic shown for fixed output voltage versions TYPICAL APPLICATIONS PIN-OUT INFORMATION MSK5175-00 High Efficiency, Ultra High Current Linear Regulators Constant Voltage/Current Regulators System Power Supplies Switching Power Supply Post Regulators Battery Powered Equipment 1 2 3 4 5 1 Enable Vin Ground Vout Adjust MSK5175-3.3,-5.0,-12 1 2 3 4 5 Enable Vin Ground Vout Flag Rev. C 7/00 ABSOLUTE MAXIMUM RATINGS VINP VIN VEN IOUT TST TLD Input Voltage (100mS 1%D.C.) -20V to +60V Input Voltage 26V Enable Voltage -0.3V to 26V Output Current 8A ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ TJ ○ Storage Temperature Range -65°C to +150°C Lead Temperature 300°C (10 Seconds Soldering) Operating Temperature MSK 5175 Series -40°C to +85°C MSK 5175B Series -55°C to +125°C ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ELECTRICAL SPECIFICATIONS Test Conditions 1 3 Parameter Output Voltage Tolerance Dropout Voltage IOUT=10mA; VIN=VOUT+1V ±0.5 ±1.0 - ±0.5 ±1.0 % - - % - 80 225 mV 2 ∆VOUT=-1%; IOUT=7.5A 1 - 425 600 - 425 625 mV VIN=VOUT+5V 1 - ±0.2 ±1.0 - ±0.2 ±1.2 % 10mA ≤ IOUT ≤ 7.5A 2,3 - ±0.3 ±2.0 - ±0.3 - % (VOUT +1V) ≤ VIN ≤ 26V 1 - ±0.05 ±0.5 - ±0.05 ±0.6 % IOUT=10mA 2,3 - ±0.5 ±1.0 - ±0.5 - % VOUT=0V; VIN=VOUT+1V - - 9.5 15 - 9.5 15 A VIN=VOUT+1V; IOUT=4A - - 35 75 - 35 80 mA VIN=VOUT+1V; IOUT=7.5A - - 120 - - 120 - mA 9 9 Reference Voltage 8 Reference Voltage Temp Drift 2 8 Thermal Shutdown 2 - 2,3 - - - 260 - - 260 - µV HIGH/ON 1 2.4 1.2 - 2.4 1.2 - V LOW/OFF 1 - 1.2 0.8 - 1.2 0.8 V HIGH/ON 1 - 20 75 - 20 75 µA LOW/OFF 1 - 1 2 - 1 2 µA VENABLE ≤ 0.8V - - 10 20 - 10 20 µA VOH=26V - - 0.01 2 - 0.01 2 µA IOL ≤ 250µA; VIN=VOUT-2V 1 - 0.2 0.4 - 0.2 0.4 V VIN=VOUT-7% - - 75 - - 75 - mV Normal Operation 1 1.22 1.24 1.26 1.22 1.24 1.26 V Normal Operation - - 20 - - 20 - ppm/°C Full Temp; VIN=VOUT+1V - - 40 120 - 40 150 nA Junction to Case - - 0.9 1.3 - 0.9 1.5 °C/W TJ - - 135 - - 135 - °C 2 2 Units 200 Flag Output On Voltage 9 Thermal Resistance Max. ±2.0 2 Adjust Pin Bias Current 2 8 Typ. 80 CL=33µF; 10Hz ≤ f ≤ 100KHz 2 Min. ±1.0 Shutdown Output Current 2 Flag Threshold Max. - 2 Flag Output Leakage 2 Typ. - 2 Enable Input Current Min. 1 1 Output Current Limit 2 Enable Input Voltage Subgroup MSK 5175 SERIES ∆VOUT=-1%; IOUT=250m A Line Regulation Output Noise MSK 5175B SERIES 2 Load Regulation Ground Current Group A NOTES: 1 Output decoupled to ground using 33µF minimum capacitor unless otherwise specified. 2 This parameter is guaranteed by design but need not be tested. Typical parameters are representative of actual device performance but are for reference only. 3 All output parameters are tested using a low duty cycle pulse to maintain TJ = TC. 4 Industrial grade devices shall be tested to subgroup 1 unless otherwise specified. 5 Military grade devices ('B' suffix) shall be 100% tested to subgroups 1,2 and 3. TC=+25°C 6 Subgroup 1 Subgroup 2 TJ=+125°C Subgroup 3 TA=-55°C 7 Please consult the factory if alternate output voltages are required. 8 Applies to MSK5175-00 adjustable version only. 9 Applies to fixed output devices only. 2 PART NUMBER OUTPUT VOLTAGE MSK5175-00 Adjustable MSK5175-3.3 +3.3V MSK5175-5.0 +5.0V MSK5175-12 +12.0V Rev. C 7/00 APPLICATION NOTES REGULATOR PROTECTION: HEAT SINK SELECTION: The MSK 5175 series is fully protected against reversed input polarity, overcurrent faults, overtemperature conditions (Pd) and transient voltage spikes of up to 60V. If the regulator is used in dual supply systems where the load is returned to a negative supply, the output voltage must be diode clamped to ground. To select a heat sink for the MSK 5175, the following formula for convective heat flow may be used. Governing Equation: Tj = Pd x (Rθjc + Rθcs + Rθsa) + Ta WHERE: Tj = Junction Temperature Pd = Total Power Dissipation Rθjc = Junction to Case Thermal Resistance Rθcs = Case to Heat Sink Thermal Resistance Rθsa = Heat Sink to Ambient Thermal Resistance Ta = Ambient Temperature OUTPUT CAPACITOR: The output voltage ripple of the MSK 5175 series voltage regulators can be minimized by placing a filter capacitor from the output to ground. The optimum value for this capacitor may vary from one application to the next, but a minimum of 33µF is recommended for optimum performance. Transient load response can also be improved by placing a capacitor directly across the load. First, the power dissipation must be calculated as follows: Power Dissipation = (Vin - Vout) x Iout Next, the user must select a maximum junction temperature. The absolute maximum allowable junction temperature is 125°C. The equation may now be rearranged to solve for the required heat sink to ambient thermal resistance (Rθsa). LOAD CONNECTIONS: In voltage regulator applications where very large load currents are present, the load connection is very important. The path connecting the output of the regulator to the load must be extremely low impedance to avoid affecting the load regulation specifications. Any impedance in this path will form a voltage divider with the load. The MSK 5175 series requires a minimum of 10mA of load current to stay in regulation. EXAMPLE; An MSK 5175-3.3 is configured for Vin=+5V and Vout=+3.3V. Iout is a continuous 1A DC level. The ambient temperature is +25°C. The maximum desired junction temperature is 125°C. Rθjc = 1.3°C/W and Rθcs = 0.5°C/W typically. Power Dissipation = (5V - 3.3V) x (1A) = 1.7 Watts Solve for Rθsa: 125°C - 25°C - 1.3°C/W - 0.5°C/W Rθsa = 1.7W ENABLE PIN: The MSK 5175 series of voltage regulators are equipped with a TTL compatible ENABLE pin. A TTL high level on this pin activates the internal bias circuit and powers up the device. A TTL low level on this pin places the controller in shutdown mode and the device draws only 5µA of quiescent current. If the enable function is not used, simply connect the enable pin to the input. = 57.02°C/W In this example, a heat sink with a thermal resistance of no more than 57°C/W must be used to maintain a junction temperature of no more than 125°C. FLAG OUTPUT PIN: MSK5175-00 OUTPUT ADJUSTMENT: All of the fixed output voltage versions of the MSK 5175 series are equipped with a flag output pin. Since the flag pin is an open collector configuration it can be pulled up to any voltage between 3V and 26V. This feature allows direct interfacing to practically any logic. This active low output has a typical level of 0.22V when the flag comparator detects an "out of regulation" condition. Flag states include low input voltage, out of regulation and output current limit. Extremely high level input voltage transients will also cause the flag output pin to activate. The MSK 5175-00 is an adjustable version in the series of high performance regulators. The diagram below illustrates proper adjustment technique for the output voltage. The series resistance of R1+R2 should be selected to pass the minimum regulator output current requirement of 10mA. DEVICE/CASE CONNECTION: The MSK 5175 series are highly thermally conductive devices and the thermal path from the package heat sink to the internal junctions is very short. Since the case is electrically isolated from the internal circuitry, the package can be directly connected to a heat sink. 3 Rev. C 7/00 TYPICAL PERFORMANCE CURVES 4 Rev. C 7/00 MECHANICAL SPECIFICATIONS NOTE: ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED. ESD Triangle indicates Pin 1. ORDERING INFORMATION MSK5175-3.3 B T U LEAD CONFIGURATIONS S= STRAIGHT; U= BENT UP; D= BENT DOWN PACKAGE STYLE T= TOP TAB; Z= Z PACK SCREENING BLANK= INDUSTRIAL; B= MIL-PRF-38534 OUTPUT VOLTAGE 00=ADJ; 3.3=+3.3V; 5.0=+5.0V; 12=+12.0V GENERAL PART NUMBER The above example is a +3.3V, Military regulator using the top tab package with leads bent up. M.S. Kennedy Corp. 4707 Dey Road, Liverpool, New York 13088 Phone (315) 701-6751 FAX (315) 701-6752 www.mskennedy.com The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make changes to its products or specifications without notice, however, and assumes no liability for the use of its products. 5 Rev. C 7/00