NCV890203GEVB NCV890203 Evaluation Board User'sManual Description The NCV890203 is a fixed-frequency, monolithic, Buck switching regulator intended for Automotive, battery-connected applications that must operate with up to a 36 V input supply. The regulator is suitable for systems with low noise and small form factor requirements often encountered in automotive driver information systems. The NCV890203 is capable of converting the typical 4.5 V to 18 V automotive input voltage range to outputs as low as 3.3 V at a constant switching frequency above the sensitive AM band, eliminating the need for costly filters and EMI countermeasures. A Reset pin signals when the output is in regulation, and a pin is provided to adjust the delay before the RSTB signal goes high. The NCV890203 also provides several protection features expected in Automotive power supply systems such as current limit, short circuit protection, and thermal shutdown. In addition, the high switching frequency produces low output voltage ripple even when using small inductor values and an all-ceramic output filter capacitor − forming a space-efficient switching regulator solution. http://onsemi.com EVAL BOARD USER’S MANUAL Key Features • • • • • • • • • • • • • • • • • Internal N-channel Power Switch Low VIN Operation Down to 4.5 V High VIN Operation to 36 V Withstands Load Dump to 40 V 2 MHz Free-running Switching Frequency Reset with Adjustable Delay Logic level Enable Input Can be Directly Tied to Battery 2.0 A (min) Cycle-by-Cycle Peak Current Limit Short Circuit Protection enhanced by Frequency Foldback ±1.75% Output Voltage Tolerance Output Voltage Adjustable Down to 0.8 V 1.4 Millisecond Internal Soft-Start Thermal Shutdown (TSD) Low Shutdown Current NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable Wettable Flanks DFN (Pin Edge Plating) These Devices are Pb-Free and are RoHS Compliant Typical Applications • Audio, Infotainment, Safety – Vision Systems, Instrumentation Figure 1. NCV890203 Evaluation Board © Semiconductor Components Industries, LLC, 2014 April, 2014 − Rev. 0 1 Publication Order Number: EVBUM2234/D NCV890203GEVB CDRV VIN VIN DBST SW L1 VOUT DFW 3V Reg CIN CBST COUT DRV BST VOUT PWM LOGIC ON OFF RSTB DELAY + GND + CDELAY + − Reset Delay FB + − RSTB Oscillator COMP Clamp + TSD Soft−Start RESET COMP Voltages Monitors RCOMP + − Enable EN + CCOMP Figure 2. NCV890203 Block Diagram TYPICAL APPLICATION CDRV DBST NCV890203 L1 VIN 1 VIN SW 10 CBST CIN 2 DRV DFW BST 9 RFB1 DELAY RSTB 3 RSTB VOUT COUT DELAY 8 CDELAY 4 GND FB 7 EN 5 EN COMP 6 RFB2 RCOMP CCOMP Figure 3. NCV890203 Typical Application http://onsemi.com 2 NCV890203GEVB Table 1. EVALUATION BOARD TERMINALS Pin Name Function VIN Positive dc Input Voltage GND Common dc Return VOUT Positive dc Output Voltage EN RSTB Master Enable Input Reset with Adjustable Delay Table 2. ABSOLUTE MAXIMUM RATINGS (Voltages are with respect to GND) Rating Dc Supply Voltage (VIN, EN) Dc Supply Voltage (RSTB) Storage Temperature Range Value Unit −0.3 to 40 V −0.3 to 6 V −55 to +150 °C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Table 3. ELECTRICAL CHARACTERSITICS Characteristic Conditions Typical Value Unit 5.0 V REGULATION Output Voltage (VOUT) Line Regulation (VOUT) IOUT = 1.0 A 0.1 % Load Regulation (VOUT) VIN = 13.2 V 0.1 % Switching Frequency 2.0 MHz Soft-start Time 1.4 ms EN = 5 V 3.25 A VIN Decreasing 3.4 V TJ Rising 170 °C SWITCHING CURRENT LIMIT Peak Current Limit (VOUT) PROTECTIONS Input Undervoltage Lockout (UVLO) Thermal Shutdown Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. http://onsemi.com 3 http://onsemi.com 4 GND EN GND GND RSTB VIN RRSTB 10K CVIN1 4.7uF 1210 50V/X7R 1 EN RSTB 5 4 3 CVIN2 1uF 0805 50V/X7R 2 VIN U1 EN GND FB DLY BST SW COMP NCV890203 RSTB DRV VIN EPAD 11 FB 7 CCOMP 330pF 0603 C0G / 50V RCOMP 12.4K 0603 CDLY 0.47uF 0603 DBST BAS16HT1G COMP FB BST CBST 0.1uF 0603 CDRV 0.1uF 0603 10V/X7R SW 6 COMP DLY BST 8 9 10 SW DRV L1 4.7uH ZFB1 4.7nF 0603 50V DLY DFW NRVB440MFST1G MBR360MFS RFB2 31.6 0603 RFB1 100 0603 Coilcraft XAL4030−472ME XAL4030−472 COUT1 10uF 1206 X7R / 10V COUT2 10uF 1206 X7R / 10V VOUT RMIN1 OPEN 1206 GND GND GND RMIN2 OPEN 1206 VOUT NCV890203GEVB Figure 4. NCV890203GEVB Evaluation Board Schematic NCV890203GEVB OPERATIONAL GUIDELINES 1. Connect a dc input voltage, within the 6.0 V to 36 V range, between VIN and GND. 2. Connect a dc enable voltage, within the 2.0 V to 36 V range, between EN and GND. This will power up the switcher. The VOUT signal should be 3.3 V. 3. Add a load to VOUT – up to 2.0 A. Figure 5. NCV890203 Board Connections ADDITIONAL GUIDELINES Output Voltage Selection The voltage output for the switcher is adjustable and can be set with a resistor divider. The FB reference for the switcher is 0.8 V. VOUT RUPPER FB = 0.8 V VREF (V) RUPPER (kW, 1%) RLOWER (kW, 1%) 1.2 0.8 5.11 10.0 1.5 0.8 8.87 10.0 1.8 0.8 12.7 10.0 2.5 0.8 21.5 10.0 3.3 0.8 31.6 10.0 5.0 0.8 52.3 10.0 Reset with Adjustable Delay The RSTB pin is pulled low as long as the voltage on the FB pin is lower than 92% (typical) of the reference voltage (which corresponds to the output voltage being lower than 92% of its regulation level). It is high impedance when the voltage goes above 94% (typical) of the regulation level, after a delay adjusted by the capacitor on the DELAY pin. The capacitor is held at ground until the output enters regulation: CDELAY is then quickly charged to the internal rail voltage (VRESU), then discharged by the Idelay current until its voltage reaches the lower threshold VDELTH. Only at this moment the RSTB pin voltage goes high, indicating the end of the Reset condition. RLOWER Use the following equation: R UPPER + R LOWER Desired Output (V) V OUT*V FB V FB Some common setups are listed below: http://onsemi.com 5 NCV890203GEVB The RSTB pin is also pulled low in case of UVLO (VIN below the UVLO threshold), TSD (temperature shutdown) or Disable (VEN below the enable threshold) events. A small filtering delay (of duration tPG) ensures that the RSTB signal doesn’t toggle from high to low in case of high frequency noise when the output is in regulation. A pull-up resistor is needed on the RSTB pin, as it features an open collector output, capable of sinking 1 mA minimum at 400 mV. VOUT time DELAY VDELU VDELTH time RSTB tRESU time Figure 6. Typical Operation of the Reset with Delay Function http://onsemi.com 6 NCV890203GEVB TYPICAL PERFORMANCE Efficiency NCV890203 Efficiency − 3.3 V 100% 90% 80% Efficiency 70% 60% 50% 40% 30% VIN = 6.0 V VIN = 13.2 V 20% VIN = 28.0 V 10% 0% 0 0.5 1 1.5 2 2.5 Output Current (A) Figure 7. Efficiency with a 3.3 V Output NCV890203 Efficiency − 5.0 V 100% 90% 80% Efficiency 70% 60% 50% 40% 30% VIN = 6.0 V VIN = 13.2 V 20% VIN = 28.0 V 10% 0% 0 0.5 1 1.5 Output Current (A) Figure 8. Efficiency with a 5.0 V Output http://onsemi.com 7 2 2.5 NCV890203GEVB Line Regulation NCV890203 − Line Regulation − 3.3 V Line Regulation (% of VOUT) 1.00% 0.50% 0.00% IOUT = 100 mA −0.50% IOUT = 500 mA IOUT = 1.0 A IOUT = 2.0 A −1.00% 0.00 5.00 10.00 15.00 20.00 25.00 30.00 Input Voltage (V) Figure 9. Line Regulation for a 3.3 V Output NCV890203 − Line Regulation − 5.0 V Line Regulation (% of VOUT) 1.00% 0.50% 0.00% IOUT = 100 mA −0.50% IOUT = 500 mA IOUT = 1.0 A IOUT = 2.0 A −1.00% 0.00 5.00 10.00 15.00 20.00 Input Voltage (V) Figure 10. Line Regulation for a 5.0 V Output http://onsemi.com 8 25.00 30.00 NCV890203GEVB Load Regulation NCV890203 − Load Regulation − 3.3 V 0.04% VIN = 6.0 V 0.02% Load Regulation (% of VOUT) VIN = 13.2 V 0.00% VIN = 28.0 V −0.02% −0.04% −0.06% −0.08% −0.10% −0.12% −0.14% 0 0.5 1 1.5 2 2.5 Output Current (A) Figure 11. Load Regulation with a 3.3 V Output NCV890203 − Load Regulation − 5.0 V 0.04% 0.02% VIN = 6.0 V VIN = 13.2 V Load Regulation (% of VOUT) 0.00% VIN = 28.0 V −0.02% −0.04% −0.06% −0.08% −0.10% −0.12% −0.14% −0.16% 0 0.5 1 1.5 Output Current (A) Figure 12. Load Regulation with a 5.0 V Output http://onsemi.com 9 2 2.5 Figure 13. Schematic http://onsemi.com 10 GND EN GND GND RSTB VIN RRSTB 10K CVIN1 4.7uF 1210 50V/X7R 1 EN RSTB 5 4 3 CVIN2 1uF 0805 50V/X7R 2 VIN EN U1 GND FB DLY BST SW COMP NCV890203 RSTB DRV VIN EPAD 11 FB 7 CDLY 0.47uF 0603 DBST BAS16HT1G COMP FB BST CCOMP 330pF 0603 C0G / 50V RCOMP 12.4K 0603 6 COMP DLY BST CBST 0.1uF 0603 CDRV 0.1uF 0603 10V/X7R SW 8 9 10 SW DRV L1 4.7uH ZFB1 4.7nF 0603 50V DLY DFW NRVB440MFST1G MBR360MFS RFB2 31.6 0603 RFB1 100 0603 Coilcraft XAL4030−472ME XAL4030−472 COUT1 10uF 1206 X7R / 10V COUT2 10uF 1206 X7R / 10V VOUT RMIN1 OPEN 1206 GND GND GND RMIN2 OPEN 1206 VOUT NCV890203GEVB SCHEMATIC NCV890203GEVB PCB LAYOUT Figure 14. Top View Figure 15. Bottom View http://onsemi.com 11 NCV890203GEVB BILL OF MATERIALS Table 4. BILL OF MATERIALS Manufacturer Manufacturer’s Part Number Substitution Allowed Kemet C0603C104K8RACTU Yes 603 Murata Electronics North America GCM1885C1H331JA16D Yes 10% 603 Murata Electronics North America GCM188R71E474KA64D Yes 4.7 mF 10% 1210 Murata Electronics North America GRM32ER71H475KA88L Yes CAP CER 10 mF 10 V 10% X7R 1206 10 mF 10% 1206 Taiyo Yuden LMK316AB7106KLHT Yes 1 CAP CER 1.0 mF 50 V X5R 0805 1.0 mF 10% 805 Murata Electronics North America UMK212BJ105KG-T Yes DBST 1 DIODE SWITCH 200 mA 75 V SOD323 75 V/0.2 A N/A SOD_323 ON Semiconductor BAS16HT1G No DFW 1 DIODE SCHOTTKY 4.0 A 40 V SMB 40 V/4.0 A N/A SMB_DIODE ON Semiconductor NRVB440MFST1G No L1 1 INDUCTOR POWER 4.7 mH 4.5 A 20% SMD 4.7 mH 4.5A XAL4030-472 Coilcraft XAL4030-472ME No *L2 1 RES 0.0 W 1/4 W JUMP 1206 SMD 0W 5% 1206 Yageo RC1206JR-070RL Yes RCOMP 1 RES 6.98 kW 1/10 W 1% 0603 SMD 6.98 kW 1% 603 Vishay/Dale CRCW06036K98FKEA Yes RFB1 1 RES 100 W 1/10 W 1% 0603 SMD 100 W 1% 603 Vishay/Dale CRCW0603100RFKEA Yes RFB2 1 RES 31.6 W 1/10 W 1% 0603 SMD 31.6 W 1% 603 Vishay/Dale CRCW060331R6FKEA Yes RRSTB 1 RES 10.0 kW 1/10 W 1% 0603 SMD 10.0 kW 1% 603 Vishay/Dale CRCW060310K0FKEA Yes ZFB1 1 CAP CER 4700 PF 50 V 10% X7R 0603 4700 pF 10% 603 Murata Electronics North America GRM188R71H472KA01D Yes CSNB 1 Do Not Populate 603 Yes RMIN1, RMIN2 2 Do Not Populate 1206 Yes RSNB 1 Do Not Populate 603 Yes BST, COMP, DLY, FB, RDEP, RMOD, SW 7 CIRCUIT PIN PRNTD .020″D .425″L Do Not Populate N/A TPA Mill-Max Manufacturing Corp. 3128-2-00-15-00-00-08-0 Yes GND1, GND2, VIN, VOUT 4 CONN JACK BANANA UNINS PANEL MOU N/A N/A BANANA Emerson Network Power Connectivity Soultions 108-0740-001 Yes Reference Designator(s) Qty. Description Value Tolerance Footprint CBST, CDRV 2 CAP.10 mF 10 V CERAMIC X7R 0603 0.1 mF 10% 603 CCOMP 1 CAP CER 330 pF 50 V C0G 0603 330 pF 10% CDLY 1 CAP CER 0.47 mF 25 V 10% X7R 0603 0.47 mF CFLT1, CFLT2, CVIN1 3 CAP CER 4.7 mF 50 V 10% X7R 1210 COUT1, COUT2 2 CVIN2 http://onsemi.com 12 NCV890203GEVB Table 4. BILL OF MATERIALS (continued) Manufacturer’s Part Number Substitution Allowed Mill-Max Manufacturing Corp. 2501-2-00-44-00-00-07-0 Yes TP Vector Electronics K24C/M Yes 10PINDFNP5 ON Semiconductor NCV890203MWTXG No Reference Designator(s) Qty. Description Value Tolerance Footprint Manufacturer GND3−GND6 4 TERM SOLDER TURRET .219″ .109″L N/A N/A TURRET EN, RSTB 2 PIN INBOARD .042″ HOLE 1000/PKG N/A N/A NCV890203 1 2.0 A 2 MHz Automotive Buck Switching Regulator NCV890203 N/A *L2 is a placeholder footprint for an optional input inductor filter component. Boards are shipped with a shorting jumper installed to complete the input path. NOTE: All devices are RoHS Compliant. 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