Click here to ask about the production status of specific part numbers. Evaluates: MAX17552 (TDFN) MAX17552 5V Output in 5V Output Voltage Applications Evaluation Kit (TDFN) General Description Quick Start The MAX17552 5V evaluation kit (EV kit) (TDFN) is a fully Recommended Equipment assembled and tested circuit board that demonstrates the MAX17552 5V EV kit (TDFN) performance of the MAX17552 60V, 100mA ultra-small, 60V adjustable, 0.5A DC power supply high-efficiency, synchronous step-down DC-DC converter Load capable of sinking 100mA at 5V in a 10-pin TDFN package. The EV kit operates over a wide input-voltage range of 6V to 60V and provides up Two digital multimeters (DMM) to 100mA load current at 5V output. It draws only 26A Procedure supply current under no-load conditions (EN/UVLO con- The EV kit is fully assembled and tested. Follow the steps nected to V ). The EV kit is programmed to switch at a IN below to verify board operation. frequency of 220kHz and delivers a peak efficiency of Caution: Do not turn on the power supply until all 93% with the supplied components. The device is simple connections are completed. to use and easily configurable with minimal external 1. Set the input voltage to 24V and disable the power components. It features cycle-by-cycle peak current limit supply. protection, undervoltage lockout, and thermal shutdown. 2. Connect the positive terminal of the power supply to The EV kit comes installed with the MAX17552ATB+ in the VIN PCB pad and the negative terminal to the nearest GND PCB pad. a 10-pin (3mm x 2mm) lead(Pb)-free/RoHS-compliant 3. Connect the positive terminal of the load to the VOUT TDFN package. PCB pad and the negative terminal to the nearest GND PCB pad. Features 4. Connect one DMM across VOUT PCB pad and the Wide 6V to 60V Input Voltage Range nearest GND PCB pad, and another DMM across the RESET PCB pad and the GND PCB pad. 5V Output, 100mA Continuous Current 5. Verify that shunts are installed on jumpers JU1 and 93% Peak Efficiency JU2. See Table 1 for details. 6. Select the shunt position on JU3 according to the 26A No Load Supply Current intended mode of operation. See Table 2 for details. Enable/UVLO Input, Resistor-Programmable UVLO 7. Turn on the input power supply and enable the load. 8. Verify that the DMM across the output terminals dis- Threshold plays 5V. Internal or Programmable Soft-Start 9. Verify that the DMM across the RESET PCB pad and GND PCB displays 5V. Selectable PWM and PFM Modes of Operation 10. Vary the input voltage between 6V and 60V and vary Open-Drain RESET Output the load current from 1mA to 100mA. Verify that output voltage is 5V with respect to GND. Overcurrent Protection 11. Reduce the input voltage to 5.3V. Overtemperature Protection 12. Verify that both the DMMs display 0V. 13. Disable the input power supply. Proven PCB Layout Note: While performing an output short-circuit test, it is Fully Assembled and Tested possible for the ceramic output capacitor to oscillate with the wiring inductance between the capacitor and short- circuited load, and thereby cause the absolute maximum rating of the V pin (-0.3V) to be exceeded. The OUT resistor (R7) and the capacitor (C5) are included on this Ordering Information appears at end of data sheet. evaluation kit to protect against unintentional violation of the above mentioned rating. In the actual system design, parasitic board or wiring inductance should be minimized and the output-voltage waveform under short-circuit operation should be verified to ensure that the absolute TDFN is a registered trademark of Maxim Integrated Products, Inc. maximum rating of the V pin is not exceeded. OUT 19-6905 Rev 3 7/21Evaluates: MAX17552 (TDFN) MAX17552 5V Output Evaluation Kit (TDFN) in 5V Output Voltage Applications JU2 configure the EV kits output for turn-on/turn-off con- Detailed Description trol. See Table 1 for proper JU1, JU2 jumper configurations. The MAX17552 5V EV kit (TDFN) is a fully assembled and Additionally, resistors R1 and R2 are included to set the tested circuit board that demonstrates the performance of the MAX17552 60V, 100mA ultra-small, high-efficiency, UVLO to a desired turn-on voltage. Refer to the Setting the Input Undervoltage-Lockout Level section in the synchronous step-down DC-DC converter in a 10-pin TDFN package. The EV kit operates over a wide input MAX17552 IC data sheet for additional information on setting the UVLO threshold voltage. voltage range of 6V to 60V and provides up to 100mA load current at 5V output. It draws only 26A supply cur- Open-Drain Reset Output (RESET) rent under no-load conditions (EN/UVLO connected to The EV kit provides a PCB pad to monitor the status of VIN). The EV kit is programmed to switch at a frequency the converter. RESET goes high when the output voltage of 220kHz and delivers a peak efficiency of 93% with the rises above 95% (typ) of its nominal regulated output volt- supplied components. The device is simple to use and age. RESET goes low when output voltage falls below easily configurable with minimal external components. 92% (typ) of its nominal regulated voltage. It features cycle-by-cycle peak current limit protection, undervoltage lockout, and thermal shutdown. Mode Selection (MODE) The EV kit includes an EN/UVLO PCB pad and jumpers The EV kit includes a jumper (JU3) to select the mode JU1 and JU2 to enable control of the converter output. of operation of the converter. Install a shunt across JU3 before powering up the EV kit to enable the forced-PWM The MODE PCB pad and jumper JU3 are provided operation. Keep JU3 open to enable the light-load PFM for selecting the mode of operation of the converter. A operation. See Table 2 for proper JU3 settings. RESET PCB pad is available for monitoring the status of the converter. The RT/SYNC PCB pad can be used to Soft-Start Input (SS) synchronize the EV kit to an external clock. The EV kit offers a fixed 5ms soft-start time. Connect the capacitor C4 to adjust the soft-start time (t ). Use the Enable/Undervoltage Lockout Programming SS following equation to determine the soft-start capacitance (EN/UVLO) value (CSS). The EN/UVLO PCB pad on the EV kit serves as an on/off CSS = 6.25 x t control while also allowing the user to program the input SS undervoltage lockout (UVLO) threshold. Jumpers JU1 and where t is in milliseconds and C is in nanofarads. SS SS Table 1. Converter EN/UVLO Jumpers (JU1, JU2) Settings SHUNT POSITION EN/UVLO PIN OUTPUT JU1 JU2 1-2 Open Connected to VIN Enabled Open 1-2 Connected to GND Disabled 1-2* 1-2* Connected to midpoint of R1, R2 resistor-divider Enabled at VIN 6V *Default position. Table 2. Mode Selection Jumper (JU3) Settings SHUNT POSITION MODE PIN MODE OF OPERATION 1-2 Connected to GND Forced PWM Open* Unconnected PFM *Default position. Maxim Integrated 2 www.maximintegrated.com