MAX16962REVKIT# Analog Devices

MAX16962R Evaluation Kit Evaluates: MAX16962R General Description Features The MAX16962R evaluation kit (EV kit) is a fully assembled S 3.5V to 5.5V Input Voltage Range (EV Kit) and tested circuit board that evaluates the MAX16962R S 3.3V at 4A Output high-efficiency synchronous PWM step-down converter S Fixed 2.2MHz Switching Frequency with integrated high-side and low-side switches. The S Configurable Forced-PWM and Skip-Mode EV kit output is configured to 3.3V and delivers up to Operation 4A output current. The EV kit circuit operates at the ICs internally set 2.2MHz switching frequency. S External Synchronization The EV kit is designed to operate from a single DC S Power-Good Output (PG1) power supply that provides 3.5V to 5.5V and up to 4A S Overcurrent and Thermal-Shutdown Protection for normal operation. However, the IC has a 2.7V to S Proven PCB Layout 5.5V input voltage range. The EV kit, shipped with a MAX16962RATEA/V+ in a 16-pin TQFN package with S Fully Assembled and Tested exposed pad, provides enhanced thermal dissipation. Ordering Information appears at end of data sheet. For pricing, delivery, and ordering information, please contact Maxim Direct at 19-6756 Rev 0 7/13 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com.MAX16962R Evaluation Kit Evaluates: MAX16962R The EV kit circuit uses a step-down converter IC to imple- Quick Start ment a step-down synchronous DC-DC converter circuit with a fixed 2.2MHz switching frequency. The EV kit Required Equipment output is configured to 3.3V and delivers up to 4A output MAX16962R EV kit current. The ICs on-board low R switches help DSON 5.5V adjustable, 5A power supply minimize efficiency losses at heavy loads and reduce Electronic load capable of sinking up to 4A critical/parasitic inductances, resulting in a very small compact layout. The EV kit circuit is designed to operate Two digital voltmeters from a single DC power supply that provides 3.5V to 5.5V Procedure and up to 4A of current. The EV kit is fully assembled and tested. Follow the steps The EV kit converter circuit is configured to 3.3V using below to verify board operation. Caution: Do not turn on resistors R6 and R7. The EV kit can be configured to the power supply until all connections are completed. operate in forced fixed-frequency PWM mode or low- 1) Verify that shunts are installed on jumpers JU1 quiescent current skip mode using jumper JU2. Ferrite (output enabled) and JU2 (forced-PWM mode). bead L2 and capacitor C9 are available for prevent- ing oscillation at the circuit input when interfacing long 2) Connect the power-supply positive and ground cables from the power supply to the EV kits VSUP and terminals to the VSUP and PGND banana jacks, PGND PCB pads. respectively. The circuit includes a SYNC PCB pad that can be used 3) Connect the positive and negative terminal of the to synchronize the IC to frequencies operating in the electronic load to the VOUT and PGND banana 1.7MHz to 2.5MHz range. The EV kit also provides a PG1 jacks, respectively. PCB pad for monitoring the power-good output and a 4) Connect a voltmeter across the VOUT and PGND PWM PCB pad for driving the PWM input. PCB pads. Configuring the Output Voltage (V ) OUT 5) Connect a voltmeter across the PG1 and GND PCB The EV kit converter is configured to 3.3V using resistors pads. R6 and R7. The EV kits output voltage (V ) can be OUT 6) Turn on the power supply. reconfigured in the range of 0.8V to 3.6V by replacing 7) Set the power-supply voltage to 5V. resistors R6 and R7. Use the following equation to recon- figure the output voltage to the desired value: 8) Enable the electronic load and set it to 4A 9) Verify that the voltmeter connected to VOUT V OUT measures approximately 3.3V. R7=R61 0.8 10) Verify that the voltmeter connected to PG1 measures approximately 5V. where V is the desired output voltage in volts and R6 OUT is typically less than 100kI. Detailed Description of Hardware The external feedback resistive divider must be frequen- The MAX16962R EV kit is a fully assembled and tested cy compensated for proper operation. Place a capacitor circuit board that contains all the components neces- across each resistor in the resistive-divider network. sary to evaluate the performance of the MAX16962R Use the following equation to determine the value of the high-efficiency, synchronous PWM step-down converter capacitors: with integrated high-side and low-side switches. The IC is available in a 16-pin TQFN package and features an R6 C8 C7 , where C7 100pF exposed pad for thermal dissipation. R7 Maxim Integrated 2 = =