MAXM17514EVKIT#

Evaluates: MAXM17514, MAXM17514 Evaluation Kit 4A Integrated Power Module General Description Features The MAXM17514 evaluation kit (EV kit) is a fully assem- High Integration Solution/Integrated Shielded Inductor bled and tested PCB that demonstrates the typical 4A 2.4V to 5.5V Input Range application circuit of the MAXM17514. The device is a Configured for 1.5V Output Voltage fixed-frequency, integrated inductor, step-down power Adjustable Output Voltage Range (0.75V to 3.6V) module for low-voltage, low-power applications. 4A Output Current The EV kit provides a 1.5V output voltage from a 2.4V 91.2% Efficiency (V = 3.3V, V = 1.5V at 1.5A) IN OUT to 5.5V input range and delivers up to 4A output current while achieving greater than 91.2% efficiency. The EV kit 1MHz Switching Frequency operates at 1MHz switching frequency and has superior Enable Input line and load-transient response. The EV kit also allows Power-Good Output Indicator (POK) the evaluation of other adjustable output voltages from Low-Profile, Surface-Mount Components 0.75V to 3.6V by changing resistors R1 and R2. Proven PCB Layout Ordering Information appears at end of data sheet. Fully Assembled and Tested 19-7560 Rev 0 4/15Evaluates: MAXM17514, MAXM17514 Evaluation Kit 4A Integrated Power Module Enable Input Quick Start The EV kit features a 2-pin jumper (JU1) that selects the Recommended Equipment enable/disable control input. The shunt is installed across MAXM17514 EV kit JU1 to enable the device and vice versa. 2.4V to 5.5V DC power supply (V ) IN Switching Frequency (FREQ) 5V DC power supply (V ) CC The EV kit features a PWM mode switching frequency. Dummy load capable of sinking 4A The switching frequency is fixed at 1MHz. Digital multimeter (DMM) Programming the Output Voltage 100MHz dual-trace oscilloscope The EV kit includes a default output programmed at 1.5V and also produces an adjustable 0.75V to 3.6V output Procedure voltage by connecting FB to a resistive divider. To obtain The EV kit is fully assembled and tested. Follow the steps an output voltage other than the default programmed below to verify board operation. Caution: Do not turn on output, simply modify the R1 and R2 resistors with values the power supply until all connections are completed. according to the following equation: 1) Ensure that the circuit is connected correctly to the supplies and dummy load prior to applying any power. R1 V V1 + OUT FB 2) Verify that a shunt is installed across jumper JU1. R2 3) Enable the power supply (V = 5V) IN where V = 0.765V. Output capacitance selection FB 4) Observe the 1.5V output with the DMM and/or changes are required for an output voltage greater oscilloscope. Look at the EP2 switching node while than 2V or capacitor temperatures above 105C. varying the load current. Refer to the MAXM17514 data sheet for output capacitance selection. Detailed Description of Hardware Table 1. Jumper JU1 Functions Input Supply Voltage The MAXM17514 EV kit can operate from a minimum SHUNT (JU1) REGULATOR V /V RANGE 4.5V single DC power supply at V PCB pad with a IN CC IN POSITION OUTPUT shunt installed across JU1. The EV kit is also configured V = 4.5V to 5.5V IN to power a lower input voltage at V PCB pad, which IN Installed Enabled V = V CC IN requires an additional 5V power supply at V PCB CC pad, a capacitor (C4) to be installed, and a connecting V = 2.4V to 5.5V IN trace between V and V (next to R3s footprint) to Installed Require an additional Enabled IN CC be cut. Table 1 lists all operating configurations of the V = 4.5V to 5.5V CC EV kit at different input voltage sources. The electrolytic V = 2.4V to 5.5V IN capacitor (C1) is required only when the V power supply is Not installed* Disabled IN V = V CC IN situated far from the MAXM17514 circuit. On the bottom layer, additional footprints of optional components are *The thin trace connecting V and V (next to R3s footprint) IN CC included to ease the board modification for different input/ must be cut before applying the additional power supply to the V PCB pad. output configurations. CC Maxim Integrated 2 www.maximintegrated.com =