RTKA2108252H00000BU

Users Manual RTKA2108252H00000BU Users Manual: Evaluation Board Industrial Analog and Power Rev.0.00 Sep 2018USERS MANUAL RTKA2108252H00000BU UG180 Rev.0.00 Evaluation Board Sep 11, 2018 1. Overview The RAA210825 is a pin-strap configurable 25A step-down PMBus-compliant DC/DC power supply module that integrates a digital PWM controller, synchronous MOSFETs, a 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 25A of continuous output current without the need for airflow or additional heat sinking. The RAA210825 simplifies configuration and control of Renesas digital power technology while offering an upgrade path to a full PMBus configuration through the pin-compatible ISL8277M. The RTKA2108252H00000BU evaluation board is a 4.0inx4.5in 4-layer FR4 board with 2oz. copper in all layers. The RAA210825 comes with a preprogrammed configuration for operating in Pin-Strap mode. Output voltage, switching frequency, input UVLO, soft-start/stop delay and ramp times, and the device SMBus address can be programmed with external pin-strap resistors. The 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 software from a PC running Microsoft Windows. The RTKA2108252H00000BU 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 5V IN OUT Pin-Strap mode for standard setting: V , switching frequency, input UVLO, soft-start/stop, and external OUT synchronization Real-time telemetry for V , V , I , temperature, duty cycle, switching frequency, and fault logging IN OUT OUT ChargeMode control that is tunable with pin-strap resistors or the PMBus interface Mechanical switch for enable and the power-good LED indicator 1.2 Specifications This board has been configured and optimized for the following operating conditions: V = 5V to 12V IN V = 1.2V OUT I = 25A MAX f = 364kHz SW ASCR gain = 250, ASCR residual = 100 On/off delay = 5ms, on/off ramp time = 5ms Input UVLO = 4.2V PMBus address = 0x28h 1.3 Ordering Information Part Number Description RTKA2108252H00000BU RAA210825 evaluation board (also included: ZLUSBEVAL3Z adapter, USB cable) UG180 Rev.0.00 Page 2 of 21 Sep 11, 2018