MAXM15062EVKIT#

Click here for production status of specific part numbers. MAXM15062 3.3V Output Evaluation Kit General Description The MAXM15062 3.3V output evaluation kit (EV kit) provides a proven design to evaluate the MAXM15062 high-voltage, high-efficiency, synchronous step-down DC-DC module. The EV kit is programmed to deliver 3.3V output for loads up to 300mA. The EV kit features an adjustable input undervoltage lockout, selectable mode, and open-drain RESET signal. The MAXM15062 data sheet provides a complete description of the module that should be read in conjunction with this EV kit data sheet prior to modifying the demo circuit. For full module features, benefits and parameters, refer to the MAXM15062 data sheet. Features ●● Highly Integrated Solution ●● Wide 5.5V to 48V Input Range ●● Fixed 3.3V Output, Delivers Up To 300mA Output Current ●● High 80.46% Efficiency (VIN = 24V, VOUT = 3.3V at 150mA) ●● 500kHz Switching Frequency ●● ENABLE/UVLO Input, Resistor-Programmable UVLO Threshold ●● PFM Feature for Better Light-Load Efficiency ●● Fixed Internal 4.1ms Soft-Start Time ●● RESET Output, with Pullup Resistor to VCC ●● Overcurrent and Overtemperature Protection (OCP and OTP) ●● Low-Profile, Surface-Mount Components ●● Proven PCB Layout ●● Fully Assembled and Tested ●● Complies with CISPR22(EN55022) Class B Conducted and Radiated Emissions 319-100325; Rev 0; 3/19 Evaluates: MAXM15062 3.3V Output-Voltage Application Quick Start Recommended Equipment ●● One 4.5V to 60V, 300mA power supply ●● 1W resistive load with 300mA sink capacity ●● Four digital multimeters (DMM) ●● MAXM15062EVKIT# Equipment Setup and Test Procedure The EV kit is fully assembled and tested. Follow the steps below to verify the board operation. Caution: Do not turn on power supply until all connections are completed. 1) Set the power supply at a voltage between 4.5V and 60V. Then, disable the power supply. 2) Connect the positive terminal of the power supply to the VIN PCB pad and the negative terminal to the nearest GND PCB pad. Connect the positive terminal of the 300mA load to the VOUT PCB pad and the negative terminal to the nearest GND PCB pad. 3) Connect the DVM (DMM in voltage-measurement mode) across the VOUT PCB pad and the nearest GND PCB pad. 4) Verify that shunt is not installed on jumper J1 (see Table 1 for details). 5) Turn on the DC power supply. 6) Enable the load. 7) Verify that the DVM displays 3.3V. Ordering Information appears at end of data sheet. Evaluates: MAXM15062 3.3V Output-Voltage Application MAXM15062 3.3V Output Evaluation Kit Detailed Description Input Capacitor Selection The MAXM15062 EV kit is designed to demonstrate salient features of MAXM15062 power module. The EV kit includes an EN/UVLO PCB pad, and jumper J1, to enable the output at a desired input voltage. Jumper J2 allows selection of either PWM or PFM mode of operation based on light-load performance requirements. An additional RESET pad is available for monitoring if the converter output voltage is in regulation. Output Capacitor Selection X7R ceramic output capacitors are preferred due to their stability over temperature in industrial applications. The required output capacitor (C5) for 3.3V output is selected from Table 1 of the MAXM15062 data sheet as 10µF/6.3V. Fixed Output Voltage The MAXM15062 is a fixed 3.3V output module. Connect FB of MAXM15062 directly to VOUT for feedback control. Enable/Undervoltage-Lockout (EN/UVLO) Programming The MAXM15062 offers an adjustable input undervoltagelockout feature. In this EV kit, for normal operation, leave jumper J1 open. When J1 is left open, the MAXM15062 is enabled when the input voltage rises above 5.4V. To disable MAXM15062, install a jumper across pins 2-3 on J1. See Table 1 for J1 settings. A potential divider formed by R1 and R2 sets the input voltage (VINU) at which the module is enabled. The value of resistor R1 is chosen to be 2.2MΩ, and R2 is calculated using the following equation: R2 = R 1 × 1.215 ( VINU − 1.215 ) where R1 and R2 are in kΩ, For MAXM15062 to turn on at 5.4V input, the Resistor R2 is calculated to be 634kΩ. The input capacitor serves to reduce the current peaks drawn from the input power supply and reduces switching frequency ripple at the input. The input capacitance must be greater than or equal to the value given in Table 1 of MAXM15062 data sheet. Input capacitor C3 is chosen to be 1µF/100V. Electro-Magnetic Interference (EMI) Compliance to conducted emissions (CE) standards requires an EMI filter at the input of a switching power converter. The EMI filter attenuates high-frequency currents drawn by the switching power converter, and limits the noise injected back into the input power source. Use of EMI filter components as shown in Figure 1 in conjunction with the schematic results in lower conducted emissions, below CISPR22 Class B limits. The MAXM15062 EV kit PCB layout is also designed to limit radiated emissions from switching nodes of the power converter, resulting in radiated emissions below CISPR22 Class B limits. Hot-Plug-In and Long Input Cables The MAXM15062 EV kit PCB provides an optional electrolytic capacitor (C2, 4.7µF/100V) to dampen input voltage peaks and oscillations that can arise during hotplug-in and/or due to long input cables. This capacitor limits the peak voltage at the input of the MAXM15062 power module, when the EV kit is powered directly from a precharged capacitive source or an industrial backplane PCB. Long input cables, between input power source and the EV kit circuit can cause input-voltage oscillations due to the inductance of the cables. The equivalent series resistance (ESR) of the electrolytic capacitor helps damp out the oscillations caused by long input cables. Further, capacitor C1 (0.1µF/100V), placed near the input of the board, helps in attenuating high frequency noise. Table 1. UVLO Enable/Disable Configuration (J1) POSITION EN/UVLO PIN MAXM15062_ OUTPUT Connected to the center node of resistor-divider R1 and R2. Programmed to startup at desired input-voltage level. 1-2 Connected to VIN Enabled if VIN is greater than VIN(MIN). 2-3 Connected to GND Disabled Not Installed* *Default position www.maximintegrated.com Maxim Integrated │  2 Evaluates: MAXM15062 3.3V Output-Voltage Application MAXM15062 3.3V Output Evaluation Kit Mode of Operation The MAXM15062 features PFM mode of operation to increase the efficiency at light-load condition. If the MODE pin is left unconnected during powerup, the module operates in PFM mode at light loads. If the MODE pin is connected to GND during power-up, the part operates in constant-frequency PWM mode at all loads. See Table 2 for J2 settings. VIN_EMI L1 82µH VIN_EMI C7 0.1µF VIN C8 0.47µF C9 1µF Internal LDO An internal regulator provides a 5V nominal supply to power the internal functions of the module. The output of the linear regulator (VCC) should be bypassed with a 1µF capacitor C4 to GND. Figure 1. EMI Filter Components Table 2. Mode of Operation (J2) POSITION MODE PIN 1-2 Operates in PWM mode. Not Installed* Operates in PFM mode at light-load conditions. *Default position EV Kit Performance Report STARTUP THROUGH ENABLE VIN = 24V, VOUT = 3.3V, FULL LOAD, PWM MODE EFFICIENCY vs. LOAD CURRENT VOUT = 3.3V, PWM MODE 100 5V/div EN/UVLO 90 80 80 20V/div LX 2V/div 5V/div VOUT EFFICIENCY (%) 70 60 VIN = 5.5V 50 VIN = 12V 40 VIN = 24V 30 VIN = 36V 20 RESET VIN = 48V 10 1ms/div 0 0 30 60 90 120 150 180 210 240 270 300 LOAD CURRENT (mA) www.maximintegrated.com EFFICIENCY vs. LOAD CURRENT VOUT = 3.3V, PFM MODE 100 90 EFFICIENCY (%) toc01 toc02 toc03 VIN = 5.5V 70 60 50 VIN = 36V 40 30 VIN = 12V VIN = 48V VIN = 24V 20 10 0 1 10 100 LOAD CURRENT (mA) Maxim Integrated │  3 Evaluates: MAXM15062 3.3V Output-Voltage Application MAXM15062 3.3V Output Evaluation Kit EV Kit Performance Report (continued) OUTPUT VOLTAGE vs. LOAD CURRENT VOUT = 3.3V, PFM MODE OUTPUT VOLTAGE vs. LOAD CURRENT VOUT = 3.3V, PWM MODE toc04 toc05 3.39 VIN = 36V VIN = 5.5V 3.306 3.304 VIN = 12V VIN = 24V VIN = 48V 3.33 VIN = 48V VIN = 12V 3.31 3.29 VIN = 24V 3.27 0 30 60 3.25 90 120 150 180 210 240 270 300 0 30 60 IOUT = 100mA 3.3060 3.3045 IOUT = 300mA IOUT = 200mA 3.3030 3.3015 90 120 150 180 210 240 270 300 LOAD CURRENT (mA) LOAD CURRENT (mA) OUTPUT VOLTAGE RIPPLE VIN = 24V, VOUT = 3.3V, FULL LOAD, PWM MODE LOAD TRANSIENT RESPONSE VIN = 24V, VOUT = 3.3V, PFM MODE (LOAD CURRENT STEPPED FROM 5mA TO 150mA) toc07 IOUT = 0A 3.3075 3.35 3.302 3.300 3.3090 VIN = 36V 3.37 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 3.308 VIN = 5.5V OUTPUT VOLTAGE (V) 3.310 OUTPUT VOLTAGE vs. INPUT VOLTAGE VOUT = 3.3V, PWM MODE toc06 3.3000 10 0 20 40 30 50 INPUT VOLTAGE(V) LOAD TRANSIENT RESPONSE VIN = 24V, VOUT = 3.3V, PWM MODE (LOAD CURRENT STEPPED FROM 150mA TO 300mA) toc09 toc08 50mV/div VOUT (AC) VOUT (AC) VOUT (AC) 100mV/div 10mV/div 100mA/div IOUT 2µs/div VIN = 24V, VOUT CONDUCTED EMISSION PLOT (EMI FILTER: C6, C7 = 0.1µF, C8 = 0.47µF, L1 = 82µH, C9 = 1µF) BODE PLOT = 3.3V, FULL LOAD, PWM MODE toc10 RADIATED EMISSION PLOT (C6 = 0.1µF, C7, C8, C9 = OPEN, L1 = SHORT) toc11 90 0 30 0 GAIN -20 -30 -40 CROSSOVER FREQUENCY = 46.091kHz PHASE MARGIN = 60.693° -60 1k 10k FREQUENCY (Hz) www.maximintegrated.com -60 -90 100k MAGNITUDE (dBµV) PHASE 20 PHASE MARGIN (⁰) 40 60 60 CISPR-22 CLASS B QP LIMIT 50 CISPR-22 CLASS B AVG LIMIT 40 PEAK EMISSION 30 20 10 0 AVERAGE EMISSION 10M 1M FREQUENCY(Hz) CONDITIONS : VIN = 24V, VOUT = 3.3V, IOUT = 0.3A 150k 50 MAGNITUDE (dBµV/m) 60 toc12 70 70 60 GAIN (dB) 100µs/div 100µs/div 80 -80 IOUT 100mA/div CISPR-22 CLASS B QP LIMIT 40 30 VERTICAL SCAN 20 10 0 -10 HORIZONTAL SCAN 100M 1G FREQUENCY(Hz) CONDITIONS : VIN = 24V, VOUT = 3.3V, IOUT = 0.3A 30M Maxim Integrated │  4 Evaluates: MAXM15062 3.3V Output-Voltage Application MAXM15062 3.3V Output Evaluation Kit Ordering Information Component Suppliers PART TYPE MAXM15062EVKIT# EV Kit #Denotes RoHS compliant. SUPPLIER WEBSITE Murata Americas www.murata.com NEC TOKIN America, Inc. www.nec-tokinamerica.com Panasonic Corp. www.panasonic.com SANYO Electric Co., Ltd. www.sanyodevice.com TDK Corp. www.component.tdk.com TOKO America, Inc. www.tokoam.com Note: Indicate that you are using the MAXM15062 when contacting these component suppliers. MAXM15062 3.3V EV Kit Bill of Materials ITEM QTY DESIGNATION DESCRIPTION MANUFACTURER PARTNUMBER-1 1 1 C1 0.1µF±10%,100V, X7R ceramic capacitor (0603) MURATA GRM188R72A104KA35 2 1 C2 4.7µF±20%,100V, Aluminimum Capacitor NICHICON UUR2A4R7MCL6GS 3 1 C3 1µF±10%,100V, X7R ceramic capacitor (1206) MURATA GRM31CR72A105KA01L TDK C3216X7R2A105K160 4 1 C4 1µF±10%,16V, X7R ceramic capacitor (0603) MURATA GRM188R71C105KA12 TDK C1608X7R1C105K 5 1 C5 10µF±10%,6.3V, X7R ceramic capacitor (1206) MURATA GRM31CR70J106K 6 1 C6 OPEN (OPTIONAL : 0.1µF ±10%, 50V, X7R ceramic capacitor (0603)) Murata GRM188R71H104KA93 7 1 R1 2.2MΩ ±1% resistor (0402) VISHAY DALE CRCW04022M20FK 8 1 R2 634kΩ ±1% resistor (0402) VISHAY DALE CRCW0402634KFK 9 1 R3 100kΩ ±1% resistor (0402) VISHAY DALE CRCW0402100KFK 10 1 U1 MAXM15062, 10-pin micro-SLIC Power Module MAXIM MAXM15062AMB+T 11 1 L1 OPTIONAL : 82µH Shielded Wirewound Inductor(2016) Murata LQH2MPN820MGRL 12 1 C7 OPTIONAL : 0.1µF ±10%,100V, X7R ceramic capacitor (0603) MURATA GRM188R72A104KA35 13 1 C8 OPTIONAL : 0.47µF±10%,100V, X7R ceramic capacitor (1206) Murata GRM31MR72A474KA35L 14 1 C9 1µF±10%,100V, X7R ceramic capacitor (1206) MURATA GRM31CR72A105KA01L www.maximintegrated.com MANUFACTURER PARTNUMBER-2 YAGEO PHICOMP RC0402FR-07100KL TDK C3216X7R2A105K160 Maxim Integrated │  5 MODE EN/UVLO GND C1 0.1UF 100V VIN 4.7UF 100V C2 1 + 2 VIN J2 J1 C3 1UF 100V 1 3 1 2 2 VCC C4 1UF 16V R2 634K R1 2.2M 7 4 8 GND VCC MODE EN/UVLO VIN 10 2 www.maximintegrated.com 9 VIN 3 RESET LX 6 FB OUT 5 LX 1 U1 MAXM15062 100K R3 VCC C5 10UF 6.3V VOUT C6 OPEN RESET PGND VOUT MAXM15062 3.3V Output Evaluation Kit Evaluates: MAXM15062 3.3V Output-Voltage Application MAXM15062 3.3V EV Kit Schematic Maxim Integrated │  6 Evaluates: MAXM15062 3.3V Output-Voltage Application MAXM15062 3.3V Output Evaluation Kit MAXM15062 3.3V EV Kit PCB Layout Diagrams 1.0’’ MAXM15062 EV Kit PCB Layout—Silk Top 1.0’’ MAXM15062 EV Kit PCB Layout—Top Layer www.maximintegrated.com Maxim Integrated │  7 Evaluates: MAXM15062 3.3V Output-Voltage Application MAXM15062 3.3V Output Evaluation Kit MAXM15062 3.3V EV Kit PCB Layout Diagrams (continued) 1.0’’ MAXM15062 EV Kit PCB Layout—Layer 2 Ground 1.0’’ MAXM15062 EV Kit PCB Layout—Layer 3 Power www.maximintegrated.com Maxim Integrated │  8 Evaluates: MAXM15062 3.3V Output-Voltage Application MAXM15062 3.3V Output Evaluation Kit MAXM15062 3.3V EV Kit PCB Layout Diagrams (continued) 1.0’’ MAXM15062 EV Kit PCB Layout—Bottom Layer www.maximintegrated.com Maxim Integrated │  9 Evaluates: MAXM15062 3.3V Output-Voltage Application MAXM15062 3.3V Output Evaluation Kit Revision History REVISION NUMBER REVISION DATE 0 3/19 DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html. 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. ©  2019 Maxim Integrated Products, Inc. │  10