Click here to ask about the production status of specific part numbers. Evaluates: MAX38802 MAX38802 Evaluation Kit General Description Features The MAX38802 evaluation kit (EV kit) serves as a High-Efficiency Solution reference platform for evaluating the MAX38802 Up to 97% Peak voltage regulator IC. This single-chip, integrated switching Up to 87% at Full Load regulator provides an extremely compact, highly efficient, Up to 96% Light-Load Efficiency at 1A with DCM fast, accurate, and reliable power-delivery solution for Enabled low-output voltage applications. The MAX38802 has Inductor Valley Current Limit is Configured to 16A different programmability options to enable a wide range (R SEL = R1 = 6.04k) of configurations. Programmable Switching Frequency from 400kHz to The EV kit consists of a fully-assembled and tested Printed 900kHz Circuit Board (PCB) implementation of the MAX38802. Programmable Positive and Negative OCP Limit Jumpers, test points, and input/output connectors are Programmable Reference Voltage with External Input included for flexibility and ease-of-use. Refer to the data Option sheet for ordering information and more details. Fast Transient Response with Quick-PWM Architecture Applications Differential Remote Sense with Open-Circuit Servers/Servers Detection I/O and Chipset Supplies Percentage-Based Output Power Good and OVP GPU Core Supply Open-Drain Status Indicator (STAT) Pin DDR MemoryVDDQ and VTT Point-of-Load (PoL) Applications Input Undervoltage and Overvoltage Lockout Adaptive Dead Time Control Integrated Boost Switch 27-Bump WLCSP (2.2mm x 3.8mm) Footprint Ordering Information appears at end of data sheet. Operation Using Ceramic Input and Output Capacitors Quick-PWM is a trademark of Maxim Integrated Products, Inc. 319-100063 Rev 2 10/20Evaluates: MAX38802 MAX38802 Evaluation Kit as well as the pull-up voltage for the Output Enable (OE) Quick Start input. This allows testing the part using a single external Required Equipment power supply. MAX38802 EV kit To enable the on-board LDO, install the shunt on jumper 12V, 10A DC power supply J4. To effectively use the LDO to supply the VCC bias voltage to the regulator, also install the shunt on jumper J12. Load capable of sinking 16A In order to properly measure the efficiency of the regulator, Digital voltmeter the LDO should not be active. To disable the LDO, both Oscilloscope shunts on J4 and J12 need to be removed. An external 1.8V, 0.1A current limited power supply needs to be connected Procedure between J12-2 and ground. The same signal should be The EV kit is fully assembled and tested. Follow the steps connected to J10 (1-2) to pull up the OE pin. below to verify the board operation. Caution: Do not turn on power supply until all connections are completed. Regulator enable 1) Connect a 12V power supply to the VDD1 and GND1 To enable the regulator, the OE pin needs to be pulled banana jacks. high. If the on-board 1.8V LDO is active (the shunt on jumper J4 is in place), its output voltage can be used for 2) Make sure the shunt is installed on: the purpose. Installing a shunt on J15 (4-6) pulls the OE a) J16 (1-2) to close the sense line. signal high to 1.8V through a 20k resistor. To shut down b) J4 (1-2) to power up the on-board LDO which the regulator, a shunt needs to be installed on J10. This regulates 1.8V. forces the OE pin low. c) J12 (1-2) to provide the 1.8V bias supply to the regulator from the on-board LDO. Status Pin d) J15 (3-5) to pull up the STAT pin. The MAX38802 has an open collector status (STAT) output e) J15 (4-6) to pull up the OE pin. to report fault or output undervoltage and output overvolt- f) J15 (2-4) to pull down/disable the OE pin. age event. Install a shunt on J15 (3-5) to pull up this pin to V through a 20k resistor. Since the STAT pin is 1.8V CC 3) Connect a voltmeter to the VOUT and GND banana tolerant, a shunt on J15 (1-3) can be installed to pull up jacks (J8, J11, J13, and J14 can be used as well). this pin through a 20k resistor to the 1.8V provided by the 4) Turn on the power supply. on-board regulator U2. 5) Verify that the voltmeter reads 2.5V. Scenario Selection Detailed Description of Hardware Several parameters of the MAX38802 can be programmed to allow optimization for specific applications. The MAX38802 EV kit provides compact, high-efficiency By selecting the appropriate value of resistor R SEL (R1) power delivery for precision outputs that demand fast and capacitor C SEL (C4), the optimum set of parameters transient response. The 27-bump (2.2mm x 3.8mm) (scenario) can be programmed. WLCSP package minimizes the PCB area. The EV kit is preset for 2.5V output and can provide up to 16A from a While R SEL selects the proper scenario, C SEL 6.5V to 14V input supply Table 1 shows the determines the nominal F SW configuration table for MAX38802. Bias Supply The MAX38802 EV kit has an on-board LDO (U2) that can provide the required 1.8V VCC bias voltage to the regulator Maxim Integrated 2 www.maximintegrated.com