PRM Regulator PRM48BF480T400B00 S C NRTL US High Efficiency Remote Sense PRM Converter FEATURES DESCRIPTION The VI Chip PRM Regulator is a high efficiency 45 V (38 to 55), non-isolated ZVS buck-boost converter, operating from a 38 to 55 Vdc input to regulator generate a regulated 5 to 55 Vdc output. The ZVS buck 5 to 55 V adjustable output range boost topology enables high switching frequency (~1 Building block for high efficiency DC-DC systems MHz) operation with high conversion efficiency. High 2 400W output power in 1.1 in footprint switching frequency reduces the size of reactive 3 97% typical efficiency, at full load components enabling power density up to 1,360 W/in . 3 3 1,360 W/in (83 W/cm ) Power Density The full VI Chip package is compatible with standard Enables a 48 V to 1.5 V, 230 A isolated, regulated 2 2 solution with total footprint of 3.3 in (21 cm ) pick-and-place and surface mount assembly processes with a planar thermal interface area and superior thermal Flexible Remote Sense architecture optimizes conductivity. regulation / feedback loop design to fit application requirements In a Factorized Power Architecture system, the Current feedback signal allows dynamic adjustment of PRM48BF480T400B00 and downstream VTM current current limit setpoint multiplier minimize distribution and conversion losses in 3.61 MHrs MTBF (MIL-HDBK-217Plus Parts Count) a high power solution. TYPICAL APPLICATIONS An external control loop and current sensor maintain regulation and enable flexibility both in the design of High Efficiency Server Processor and Memory Power voltage and current compensation loops to control of High Density ATE System DC-DC Power output voltages and currents. Telecom NPU and ASIC Core Power LED Drivers High Density Power Supply DC-DC Rail Outputs Non-isolated Power Converters 48 V to 1.5 V, 230A Voltage Regulator Voltage Control Feedback Enable/ Disable Voltage Reference PC PR TM PC +IN +OUT +IN +OUT1 TM +OUT2 PRM TM 38 to 55 VTM Current Regulator Vdc Input Multiplier Load -IN -IN -OUT -OUT1 IF RE SG VC VC -OUT2 PC Current +IN +OUT1 +OUT2 Sense TM VTM Current Multiplier Constant -IN -OUT1 VC -OUT2 Vc PRM Regulator Rev 1.1 800 927.9474 PRM48BF480T400B00 1.0 ABSOLUTE MAXIMUM RATINGS The ABSOLUTE MAXIMUM ratings below are stress ratings only. Operation at or beyond these maximum ratings can cause permanent damage to device. Electrical specifications do not apply when operating beyond rated operating conditions. All voltages are specified relative to SG unless otherwise noted. Positive pin current represents current flowing out of the pin. Min Max Unit -0.3 10.5 V PR .. 10 mA -0.3 5.7 V PC .. 10 mA -0.3 5.7 V TM .. 1 mA +IN to IN -1 62 V -0.5 10.5 V VS .. 100 mA SG 100 mA IF -0.5 5.7 V RE -0.3 5 V -0.5 18 V VC to OUT .. 1.8 A +OUT to OUT -1 62 V Output Current 11 A Operating Analog IC Junction Temperature -40 125 C Storage Temperature -40 125 C 2.0 ELECTRICAL CHARACTERISTICS Specifications apply over all line and load conditions, T = 25 C and output voltage from 20V to 55V, unless otherwise J noted. Boldface specifications apply over the temperature range of -40 C < T < 125 C (T-grade). J Attribute Symbol Conditions / Notes Min Typ Max Unit POWER INPUT SPECIFICATION V Input Voltage Range IN 38 45 55 V V Slew Rate dV /dt 0 < V < 18 V 0.001 1000 V/ms IN IN IN No Load Power Dissipation P PC HIGH, V = 45 V 2.4 4 W NL IN I PC LOW, V = 45 V Input Quiescent Current QC IN 4.5 8.5 mA I I = 8.33A, V = 38 V, V =48V Input Current IN DC OUT IN OUT 10.9 11.0 A C Effective value, V = 45 V (see Fig. 20) Input Capacitance (Internal) IN INT IN 4 F R Input Capacitance (Internal) ESR Cin 1.5 m POWER OUTPUT SPECIFICATION V Output Voltage Range OUT 5 48 55 V I Output Current OUT See Fig.16, SOA 8.33 A P Output Power OUT See Fig.16, SOA 400 W T From PC pin release to V ,V pre-applied and T already expired ON OUT IN OFF 20 s Output Turn-ON Delays T + T From V applied to V , PC floating OFF ON IN OUT 18.02 ms Equal input, output and PR voltage at full load 10 % V = 45 V, V = 48 V IN OUT Current Sharing Difference Equal input, output and PR voltage at full load I 24 % OUT SHARE (exclusive of current limit) Over line and trim, with 25C < T < 100C but negligible part-part temp mismatch C Equal input, output and PR voltage at full load 35 % Over line and trim, with 25C < TC < 100C and <= 75C part-part temp. mismatch (worst case) Nominal line, full load, V = 48V 96.0 96.8 % OUT Efficiency 50% load and V = 48 V over temperature 94.0 % OUT >50% load over temperature 90.0 % I Output Discharge current OD Section 4.0 0.5 mA V C = 0 F, I = 8.33 A, V =45V, V =48V,20MHz BW Output Voltage Ripple OUT PP OUT EXT OUT IN OUT 960 1500 mV L Output Inductance (Parasitic) OUT PAR Frequency 1 MHz, Simulated J-Lead model 1.9 nH Output Capacitance (Internal) C Effective value, V = 48 V (see Fig. 20) 4 OUT INT OUT F Output Capacitance (Internal) ESR R 1.5 m Cout POWERTRAIN PROTECTIONS Input Undervoltage Turn-ON V Instantanous powertrain shutdown, latched after T 35.75 37.13 V IN UVLO+ BLANK Input Undervoltage Turn-OFF V 31.97 33.56 V IN UVLO- V Instantanous powertrain shutdown, latched after T Input Overvoltage Turn-ON IN OVLO+ BLANK 55.91 57.24 V V Input Overvoltage Turn-OFF IN OVLO- 58.44 59.91 V Overcurrent (IF) and Input T 50 120 150 s BLANK Over/Undervoltage Blanking Time V Output Overvoltage Threshold OUT OVLO+ Instantaneous, latched shutdown 55.25 56.57 59.04 V T Instantaneous, latched shutdown guaranteed by design, not production tested V = 4.03V Thermal Shutdown Setpoint J OTP TM 130 C Overtemperature, Output Overvoltage T 2 s PROT and PC Shutdown Response Time Short Circuit Vout Threshold V 3.0 V SC VOUT V Short Circuit Vout Recovery Thres hold SC VOUTR 4.0 V V Short Circuit Vpr Threshold SC VPR 7.2 V V Short Circuit Vpr Recovery Threshold SC VPRR 7.1 V T Short circuit fault latched after V and V thresholds persist for this time Short Circuit Timeout SC SC VOUT SC VPR 20 ms Short Circuit Recovery Time T 0.1 ms SCR Output Power Limit P 400 W PROT PRM Regulator Rev 1.1 800 927.9474