MAXM17514 Evaluation Kit
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MAXM17514EVKIT# (pdf) |
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MAXM17514 Evaluation Kit Evaluates MAXM17514, 4A Integrated Power Module The MAXM17514 evaluation kit EV kit is a fully assembled and tested PCB that demonstrates the typical 4A application circuit of the MAXM17514. The device is a fixed-frequency, integrated inductor, step-down power module for low-voltage, low-power applications. The EV kit provides a 1.5V output voltage from a 2.4V to 5.5V input range and delivers up to 4A output current while achieving greater than efficiency. The EV kit operates at 1MHz switching frequency and has superior line and load-transient response. The EV kit also allows the evaluation of other adjustable output voltages from 0.75V to 3.6V by changing resistors R1 and R2. Ordering Information appears at end of data sheet. ●● High Integration Solution/Integrated Shielded Inductor ●● 2.4V to 5.5V Input Range ●● Configured for 1.5V Output Voltage ●● Adjustable Output Voltage Range 0.75V to 3.6V ●● 4A Output Current ●● Efficiency VIN = 3.3V, VOUT = 1.5V at 1.5A ●● 1MHz Switching Frequency ●● Enable Input ●● Power-Good Output Indicator POK ●● Low-Profile, Surface-Mount Components ●● Proven PCB Layout ●● Fully Assembled and Tested MAXM17514 Evaluation Kit Evaluates MAXM17514, 4A Integrated Power Module Quick Start Recommended Equipment ●● MAXM17514 EV kit ●● 2.4V to 5.5V DC power supply VIN ●● 5V DC power supply VCC ●● Dummy load capable of sinking 4A ●● Digital multimeter DMM ●● 100MHz dual-trace oscilloscope Procedure The EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution Do not turn on the power supply until all connections are completed. 1 Ensure that the circuit is connected correctly to the supplies and dummy load prior to applying any power. 2 Verify that a shunt is installed across jumper JU1. 3 Enable the power supply VIN = 5V 4 Observe the 1.5V output with the DMM and/or oscilloscope. Look at the EP2 switching node while varying the load current. Detailed Description of Hardware Input Supply Voltage The MAXM17514 EV kit can operate from a minimum 4.5V single DC power supply at VIN PCB pad with a shunt installed across JU1. The EV kit is also configured to power a lower input voltage at VIN PCB pad, which requires an additional 5V power supply at VCC PCB pad, a capacitor C4 to be installed, and a connecting trace between VIN and VCC next to R3’s footprint to be cut. Table 1 lists all operating configurations of the EV kit at different input voltage sources. The electrolytic capacitor C1 is required only when the VIN power supply is situated far from the MAXM17514 circuit. On the bottom layer, additional footprints of optional components are included to ease the board modification for different input/ output configurations. Enable Input The EV kit features a 2-pin jumper JU1 that selects the enable/disable control input. The shunt is installed across JU1 to enable the device and vice versa. Switching Frequency FREQ The EV kit features a PWM mode switching frequency. The switching frequency is fixed at 1MHz. Programming the Output Voltage The EV kit includes a default output programmed at 1.5V and also produces an adjustable 0.75V to 3.6V output voltage by connecting FB to a resistive divider. To obtain an output voltage other than the default programmed output, simply modify the R1 and R2 resistors with values according to the following equation: V= OUT R1 R2 where VFB = 0.765V. Output capacitance selection changes are required for an output voltage greater than 2V or capacitor temperatures above 105°C. Refer to the MAXM17514 data sheet for output capacitance selection. Table Jumper JU1 Functions SHUNT JU1 POSITION Installed Installed Not installed* VIN/VCC RANGE VIN = 4.5V to 5.5V VCC = VIN VIN = 2.4V to 5.5V Require an additional VCC = 4.5V to 5.5V VIN = 2.4V to 5.5V VCC = VIN REGULATOR OUTPUT Enabled Enabled Disabled *The thin trace connecting VIN and VCC next to R3’s footprint must be cut before applying the additional power supply to the VCC PCB pad. Maxim Integrated 2 MAXM17514 Evaluation Kit Ordering Information PART MAX17514EVKIT# #Denotes RoHS compliant. TYPE EV Kit Evaluates MAXM17514, 4A Integrated Power Module Maxim Integrated 7 MAXM17514 Evaluation Kit 4/15 Initial release Evaluates MAXM17514, 4A Integrated Power Module PAGES CHANGED For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 2015 Maxim Integrated Products, Inc. 8 |
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