User Manual ISL9122AIIN-EVZ, ISL9122AIRN-EVZ Evaluation Boards The ISL9122AIIN-EVZ and ISL9122AIRN-EVZ platform allows quick evaluation of the high-performance features of the ISL9122A buck-boost regulator. The ISL9122A is a highly integrated non-inverting buck-boost switching regulator that accepts input voltages both above or below the regulated output voltage. It features an extremely 2 low quiescent current consumption, excellent efficiency and an I C interface that allows you to access its internal registers, for output voltage and operation mode control. Key Features Small, compact design 2 I C interface for programmable V , slew rate and various operation modes (Forced Bypass, Auto-PFM, OUT Forced PWM) Connectors, test points, and jumpers for easy probing Specifications The boards are designed to operate at the following operating conditions: Input voltage rating from 1.8V to 5.5V 2 Programmable output voltage range of 1.8V to 5.375V and selectable transition slew rate through I C interface Up to 500mA output current (V = 3.6V, V = 3.3V) IN OUT Operating temperature range: -40C to +85C Ordering Information Part Number Description ISL9122AIIN-EVZ Evaluation board for ISL9122AIINZ ISL9122AIRN-EVZ Evaluation board for ISL9122AIRNZ Related Literature For a full list of related documents, visit our website: ISL9122A device page VIN VIN LX1 GND LX2 VOUT VOUT EN GND SDA SCL 2 I C GND Figure 1. ISL9122AIIN-EVZ, ISL9122AIRN-EVZ Block Diagram R12UZ0080EU0101 Rev.1.01 Page 1 of 16 Oct.1.20ISL9122AIIN-EVZ, ISL9122AIRN-EVZ 1. Functional Description 1. Functional Description The ISL9122AIIN-EVZ and ISL9122AIRN-EVZ evaluation boards provide a simple platform to evaluate the feature-rich ISL9122A buck-boost regulator. Both boards have a 3.3V output after start-up and an output voltage 2 that can be programmed by I C. Each evaluation board is optimized to best perform with the ISL9122A IC series. The input power and load connections are provided through multi-pin connectors for high-current operations. The evaluation boards are shown in Figure 4 and Figure 5. Table 1 lists the test points and jumpers for the 2 boards. The ISL9122A internal registers can be accessed by I C through the onboard jumper header J5, and its mode control register configures the part into the various operation modes. See the Evaluation Software Installation and Use to configure the board output voltage and operation modes. Table 1. Description of Test Points and Jumpers Test Points Description J1 Header for connecting input power J2 Header for connecting external load J4 Header for the EN pin J4 = GND disables the part output J4 = V enables the part output IN 2 J5 Header for connecting I C interface J1 S+/S- V Kelvin connection for efficiency measurements IN J2 S+/S- V Kelvin connection for efficiency measurements OUT TP1 Through Hole Mount PCB test point for LX1 (Input side of power inductor) TP2 Through Hole Mount PCB test point for LX2 (Output side of power inductor) TP3 Through Hole Mount PCB test point for VOUT TP4 Single Turret Terminal test point for VIN TP5 Single Turret Terminal test point for VOUT TP6 Single Turret Terminal test point for GND TP7 Single Turret Terminal test point for GND The following are included in this manual: ISL9122 Evaluation Software Window ISL9122AIIN-EVZ Circuit Schematic ISL9122AIIN-EVZ Board Layout ISL9122AIIN-EVZ Bill of Materials ISL9122AIRN-EVZ Circuit Schematic ISL9122AIRN-EVZ Board Layout ISL9122AIRN-EVZ Bill of Materials 1.1 Operating Range The V range of the boards is 1.8V to 5.5V while the adjustable V range is 1.8V to 5.375V. The I range of IN OUT OUT the boards is 0 to 500mA. The operating ambient temperature range is -40C to +85C. R12UZ0080EU0101 Rev.1.01 Page 2 of 16 Oct.1.20