Click here to ask about the production status of specific part numbers. Evaluates: MAX38803 MAX38803 Evaluation Kit General Description Features The MAX38803 evaluation kit (EV kit) serves as a High-Efficiency Solution reference platform for evaluating the MAX38803 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 MAX38803 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 MAX38803. 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 Differential Remote Sense with Open-Circuit Detection Applications Percentage-Based Output Power Good and OVP Servers/Servers Open-Drain Status Indicator (STAT) Pin I/O and Chipset Supplies GPU Core Supply Input Undervoltage and Overvoltage Lockout DDR MemoryVDDQ and VTT Adaptive Dead Time Control Point-of-Load (PoL) Applications Integrated Boost Switch 27-Bump WLCSP (2.2mm x 3.8mm) Footprint Operation Using Ceramic Input and Output Ordering Information appears at end of data sheet. Capacitors Quick-PWM is a trademark of Maxim Integrated Products, Inc. 319-100064 Rev 2 10/20Evaluates: MAX38803 MAX38803 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. MAX38803 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, Oscilloscope both the shunts on J4 and J12 need to be removed. An external 1.8V, 0.1A current limited power supply needs to Procedure be connected between J12-2 and ground. The same signal The EV kit is fully assembled and tested. Follow the steps should be 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), the 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 MAX38803 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 3) Connect a voltmeter to the VOUT and GND banana to V through a 20k resistor. Since STAT pin is 1.8V CC jacks (J8, J11, J13, and J14 can be used as well). tolerant, a shunt on J15 (1-3) can be installed to pull up this pin through a 20k resistor to the 1.8V provided by 4) Turn on the power supply. the on-board regulator U2. 5) Verify that the voltmeter reads 2.5V. Scenario Selection Detailed Description of Hardware Several parameters of the MAX38803 can be The MAX38803 provides compact, high-efficiency power programmed to allow optimization for specific applications. delivery for precision outputs that demand fast transient By selecting the appropriate value of resistor R SEL (R1) response. The 27-bump (2.2mm x 3.8mm) WLCSP package and capacitor C SEL (C4), the optimum set of parameters minimizes the printed circuit board area. The EV kit is (scenario) can be programmed. preset for 2.5V output and can provide up to 16A from a While R SEL selects the proper scenario, C SEL determines 6.5V to 14V input supply Table 1 shows the configuration table the nominal F SW for MAX38803. Bias Supply The MAX38803 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