Users Manual RTKA2108702H00000BU Users Manual: Evaluation Board Industrial Analog and Power Rev.0.00 Sep 2018USERS MANUAL RTKA2108702H00000BU UG181 Rev.0.00 Evaluation Board Sep 13, 2018 1. Overview The RAA210870 is a pin-strap configurable 70A step-down PMBus-compliant DC/DC power supply module that integrates a digital PWM controller, synchronous MOSFETs, power inductor, and passive components. Only input and output capacitors are needed to finish the design. Because of its thermally enhanced HDA packaging technology, the module can deliver up to 70A of continuous output current without the need for airflow or additional heat sinking. The RAA210870 uses ChargeMode control (ASCR) architecture, which responds to a transient load within a single switching cycle. The RTKA2108702H00000BU evaluation board is a 4.7inx4.8in 8-layer FR4 board with 2oz. copper on all layers. This evaluation board comes with placeholders for pin-strap resistor population to adjust output voltage, switching frequency, soft-start/stop timing, input UVLO threshold, ASCR gain and residual parameters, and device PMBus address. Fault limits can be easily programmed or changed using a PMBus-compliant serial bus interface. The optional ZLUSBEVAL3Z (USB to PMBus adapter) is provided with this evaluation board, which connects the evaluation board to a PC to activate the PMBus communication interface. The PMBus command set is accessed by using the PowerNavigator evaluation software from a PC running Microsoft Windows. The RTKA2108702H00000BU can operate in Pin-Strap mode without needing the ZLUSBEVAL3Z adapter or PMBus communication. 1.1 Key Features V range of 4.5V to 14V, V adjustable from 0.6V to 2.5V IN OUT Programmable V , input and output UVP/OVP, OTP/UTP, soft-start/stop, and external synchronization OUT Monitor: V , V , I , temperature, duty cycle, switching frequency, and faults IN OUT OUT ChargeMode control tunable with PMBus Mechanical switch for enable and power-good LED indicator 1.2 Specifications This board is configured for the following operating conditions by default: V = 4.5V to 12V IN V = 0.93V OUT I = 70A MAX f = 320kHz SW Peak efficiency: >91% at 70% load ASCR gain = 200, ASCR residual = 90 On/off delay = 5ms On/off ramp time = 5ms 1.3 Ordering Information Part Number Description RTKA2108702H00000BU RAA210870 evaluation board, ZLUSBEVAL3Z adapter, USB cable 1.4 Related Literature For a full list of related documents, visit our website RAA210870 product page UG181 Rev.0.00 Page 2 of 22 Sep 13, 2018