JW5223

EV5223_S0_R0 2A, 6V Synchronous Step-Down Converter Evaluation Board Parameters Subject to Change Without Notice FEATURES











DESCRIPTION 2.5V to 6V operating input range Up to 2A output current Up to 94% peak efficiency High efficiency (>85%) at light load Internal Soft-Start 1.5MHz switching frequency Input under voltage lockout Short circuit protection Thermal protection Hot-plug in protection Output POK indication (available in SOT23-6 package) Available in SOT23-5/SOT23-6 package APPLICATIONS




5V or 3.3V Point of Load Conversion Set Top Boxes Telecom/Networking Systems Storage Equipment GPU/DDR Power Supply The JW ®5223 is a current mode monolithic buck switching regulator. Operating with an input range of2.5V-6V, the JW5223delivers 1.2A of continuous output current with integrated P-Channel and N-Channel MOSFETs. The internal synchronous power switches provide high efficiency. At light loads, the regulator operates in low frequency to maintain high efficiency. Current mode control provides tight load transient response and cycle-by-cycle current limit. The JW5223 guarantees robustness with hiccup output short-circuit protection, FB short-circuit protection, current run-away protection, input under voltage lockout, hot-plug protection, and thermal protection. ELECTRICAL SPECIFICATIONS Parameter Input Voltage Output Voltage Output Current Symbol VIN VOUT IOUT Value 2.5~6 1.8 0~1.2 Unit V V A TYPICAL PERFORMANCE EV5223_S0_R0 Rev.0.2 JoulWat®t Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 1 EV5223_S0_R0 JoulWatt SCHEMATIC JW5223_SOT23-6 U1 VIN 4 1 R1 1 100K 2 VIN SW EN POK FB 1 5 R4 10K 6 J1 J1 C1 10uF 1 2 1 2 GND VOUT+ 1.5uH L1 3 R2 20K C2 10uF C0 NC C3 10uF C4 22uF R3 10K 1 1 GND GND VOUT- BILL OF MATERIALS Qty Designator Value 0 C0 NC 2 C1,C2 10uF Description Ceramic capacitor Package Manufacturer Manufacturer P/N 0805C 10V ,X7R 1 C3 22uF Ceramic capacitor 0805C 6.3V ,X7R 0 C4 NC 1 L1 1.5uH/3A Inductor 1 R1 100k Resistor,5% 0603R 1 R2 20k Resistor,1% 0603R 1 R3 10k Resistor,1% 0603R 1 R4 10k Resistor,5% 0603R 1 VIN 2.5V~6V TEST-Pole 1 VOUT 1.8V/1.2A TEST-Pole 1 JW5223 6V/1.2A EV5223_S0_R0 Rev.0.2 Buck WurthElektronik SOT23-6 JoulWatt® Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Joulwatt JW5223 2 EV5223_S0_R0 JoulWatt PRINTED CIRCUIT BOARD LAYEROUT Figure1— —Top Layer Figure2— —Bottom Layer Figure3— —Silk Layer QUICK START GUIDE 1. Connect the positive terminal and negative terminal of the load to Vout and GND of EVB, respectively. 2. Connect a power supply between VIN and GND with the supply in “OFF” state. Set the output voltage of the power supply to 2.5V~6V. 3. Turn on the power supply and the evaluation board starts operating in normal condition. 4. The output voltage can be adjusted by varying the R2 and R3 on EVB. For example： ：Fixed R3 to10K,when adjusting the output voltage to 3.3V， ， R2=Vout/0.6*R3-R3. 5. For more information, please refer to the datasheet of JW5223. EV5223_S0_R0 Rev.0.2 JoulWat®t Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 3 EV5223_S0_R0 JoulWatt TYPICAL PERFORMANCE CHARACTERISTICS Vin = 5V, Vout = 1.8V, L = 1.5µH, Cout = 22µF, TA = +25°C, unless otherwise noted Steady State Test Startup through Enable Shutdown through Enable VIN=5V, Vout=1.8V Iout=1.2A VIN=5V, Vout=1.8V Iout=1.2A(Resistive load) VIN=5V, Vout=1.8V Iout=1.2A(Resistive load) Vin 1V/div VEN 2V/div VEN 2V/div VO.AC 10mV/div VO 2V/div VO 2V/div VSW 5V/div VSW 5V/div VSW 5V/div IL 1A/div IL 1A/div IL 500mA/div 400 us/div 400 us/div 1us/div Heavy Load Operation Medium Load Operation Light Load Operation 1.2A LOAD 0.6A LOAD 0 A LOAD Vin 1V/div Vin 1V/div VO.AC 10mV/div VO.AC 10mV/div VSW 5V/div VSW 5V/div IL 500mA/div IL 500mA/div 1us/div 1us/div Short CircuitProtection Short CircuitProtection Load Transient VIN=5V, Vout=1.8V Iout=1.2A- Short VIN=5V, Vout=1.8V Iout= Short-1.2A 0.6A LOAD Vin 2V/div Vin 2V/div VO 1V/div VO 1V/div VSW 5V/div VSW 5V/div IL 2A/div IL 2A/div 20ms/div EV5223_S0_R0 Rev.0.2 → 1.2A LOAD→0.6A LOAD VO.AC 100 mV/div IL 500 mA/div 20ms/div JoulWatt® Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 200 us/div 4 EV5223_S0_R0 JoulWatt IMPORTANT NOTICE
Joulwatt Technology Inc. reserves the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein.
Any unauthorized redistribution or copy of this document for any purpose is strictly forbidden.
Joulwatt Technology Inc. does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Copyright © 2017JW5223_S0_R0 _ Incorporated. All rights are reserved by Joulwatt Technology Inc. EV5223_S0_R0 Rev.0.2 JoulWat®t Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 5