End of Life PRM Regulator 28 Vdc Input MIL-COTS MP028F036M12AL S CUNRTLS Non-isolated Regulator Features V range 16 50 Vdc Adaptive Loop feedback IN V = 16 50 V IN 3 High density 407 W/in ZVS buck-boost regulator V = 26 50 V OUT 2 Small footprint 108 W/in 1.3 MHz switching frequency P = 120 W OUT I = 3.3 A Low weight 0.5 oz (15 g) 95% efficiency OUT Surface-mount or ) -55 C to 125 C operation (T J Through-hole package Product Description Absolute Maximum Ratings The PRM regulator is a very efficient non-isolated Parameter Values Unit Notes regulator capable of both boosting and bucking a wide +In to -In -1.0 to 60.0 Vdc range input voltage. It is specifically designed to provide PC to -In -0.3 to 6.0 Vdc a controlled Factorized Bus distribution voltage for PR to -In -0.3 to 9.0 Vdc powering downstream VTM current multiplier fast, efficient, isolated, low noise Point-of-Load (POL) IL to -In -0.3 to 6.0 Vdc converters. In combination, PRM modules and VTM VC to -In -0.3 to 18.0 Vdc modules form a complete DC-DC converter subsystem +Out to -Out -0.3 to 59 Vdc offering all of the unique benefits of Vicors Factorized SC to -Out -0.3 to 3.0 Vdc TM TM Power Architecture (FPA ): high density and VH to -Out -0.3 to 9.5 Vdc efficiency low noise operation architectural flexibility OS to -Out -0.3 to 9.0 Vdc extremely fast transient response and elimination of CD to -Out -0.3 to 9.0 Vdc bulk capacitance at the Point-of-Load (POL). SG to -Out 100 mA In FPA systems, the POL voltage is the product of the Continuous output current 3.3 Adc Factorized Bus voltage delivered by the PRM module Continuous output power 120 W and theK-facto (the fixed voltage transformation ratio) of a downstream VTM module. The PRM MSL 4 Case temperature during reflow 245 C regulator controls the Factorized Bus voltage to provide (Datecode 1528 regulation at the POL. Because VTM modules perform and later) true voltage division and current multiplication, the Operating junction temperature -40 to 125 C T-Grade Factorized Bus voltage may be set to a value that is Storage temperature -40 to 125 C T-Grade substantially higher than the bus voltages typically found inintermediate bu systems, reducing distribution losses and enabling use of narrower DC-DC Converter distribution bus traces. A Military PRM module-VTM module chip set can provide up to 100 A or 115 W at a 3 3 FPA system density of 169 A/in or 195 W/in and VC VH P C SC +Out Factorized +In 0.01 F TM SG because the PRM module can be located, or IL OS Bus (V ) NC ROS F L NC factorized remotely from the POL, these power PRM -AL P R CD +Out 10 k Module RCD TM O VTM densities can effectively be doubled. VC +In +Out Module PC 0.4 H A Out The Military PRM module described in this data sheet V IN 10 K D In features a uniqueAdaptive Loo compensation In Out Out Ro feedback: a single wire alternative to traditional remote sensing and feedback loops that enables precise control The MP028F036M12AL is used with any 036 input series VTM module to provide a of an isolated POL voltage without the need for either a regulated and isolated output. direct connection to the load or for noise sensitive, bandwidth limiting, isolation devices in the feedback path. PRM Regulator 28 Vdc Input Rev 3.8 vicorpower.com 800 927.9474 Page 1 of 14 08/2015Not Recommended for New Designs MP028F036M12AL General Specifications Part Numbering MP 028 F 036 M 12 AL Configuration Product Grade Temperatures (C) AL = Adaptive Loop Input Voltage Output Power Nominal Regulator Designator F = J-lead Grade Storage Operating (T ) Factorized Bus J Designator T = Through hole Voltage T -65 to125 -55 to125 (=P /10) f Overview of Adaptive Loop Compensation Adaptive Loop compensation, illustrated in Figure 1, contributes to the The VI Chips bi-directional VC port : bandwidth and speed advantage of Factorized Power. The PRM 1. Provides a wake up signal from the PRM to the VTM that monitors its output current and automatically adjusts its output voltage synchronizes the rise of the VTM output voltage to that of the PRM. to compensate for the voltage drop in the output resistance of the 2. Provides feedback from the VTM to the PRM to enable the PRM to VTM. R sets the desired value of the VTM output voltage, Vout R OS CD compensate for the voltage drop in VTM output resistance, R . O is set to a value that compensates for the output resistance of the VTM (which, ideally, is located at the point of load). For more information on configuring a PRM & VTM pair for adaptive loop, please see AN:024 Accurate Point of Load Voltage Regulation Using Simple Adaptive Loop Feedback. VC VH SC P C +Out Factorized +In 0.01 F SG TM IL OS Bus (V ) F L NC ROS NC PRM -AL P R CD +Out 10 k Module RCD TM O VTM VC +In +Out Module PC 0.4 H A Out V IN 10 K D In In Out Out Ro Figure 1 With Adaptive Loop control, the output of the VTM is regulated over the load current range with only a single interconnect between the PRM and VTM and without the need for isolation in the feedback path. PRM Regulator 28 Vdc Input Rev 3.8 vicorpower.com 800 927.9474 Page 2 of 14 08/2015