JW5393FSOTI#TR

JW5393/JW5393F 18V/3A Sync. Step-Down Converter Preliminary Specifications Subject to Change without Notice DESCRIPTION FEATURES The JW ®5393 and JW ®5393F are monolithic buck switching regulators based on I2 architecture for fast transient response. Operating with an input range of 4.5V~18V, JW5393 and JW5393F deliver 3A of continuous output current with two integrated N-Channel MOSFETs. The internal synchronous power switches provide high efficiency without the use of an external Schottky diode. At light loads, JW5393 operates in low frequency to maintain high efficiency.           JW5393 and JW5393F guarantee robustness with output short protection, thermal protection, current run-away protection and input under voltage lockout. JW5393 and JW5393F are available in SOT563 package, which provide a compact solution with minimal external components. Company’s Logo is Protected, “JW” and “JOULWATT” are Registered  4.5V to 18V operating input range 3A output current Up to 95% efficiency PFM mode (JW5393) at light load FCC mode (JW5393F) at light load 600kHz switching frequency Internal soft-start Input under voltage lockout Current run-away protection Output short protection Thermal protection Available in SOT563 package APPLICATIONS      Distributed Power Systems Networking Systems FPGA, DSP, ASIC Power Supplies Green Electronics/ Appliances Notebook Computers Trademarks of JoulWatt technology Inc. TYPICAL APPLICATION CBST L VIN VIN BST Cff R1 CIN VOUT SW EN R2 JW5393 JW5393F FB RH RL COUT GND JW5393/JW5393F Rev.0.1 JoulWatt® Proprietary Information. Patent Protected. 2021/06/18 Unauthorized Photocopy and Duplication Prohibited. This document contains information of a product under development. Joulwatt reserves the right to change this product without notice. 1 JW5393/JW5393F JoulWatt ORDER INFORMATION DEVICE1) PACKAGE JW5393SOTI#TR SOT563 TOP MARKING2) ENVIRONMENTAL3) JW7□ Green YW□□ JW8□ JW5393FSOTI#TR SOT563 Green YW□□ Notes： JW # TR 1) JW 2) Line1: Tape and Reel (If TR is not shown, it means Tube) Package Code Part No. YW Lot number Product code Line2: Week code Joulwatt LOGO Year code 3) All Joulwatt products are packaged with Pb-free and Halogen-free materials and compliant to RoHS standards. DEVICE INFORMATION DEVICE Operation Mode at light load Function Package JW5393SOTI#TR PFM - SOT563 JW5393FSOTI#TR FCCM - SOT563 PIN CONFIGURATION TOP VIEW VIN 1 6 FB SW 2 5 EN GND 3 4 BST SOT563 JW5393/JW5393F Rev.0.1 JoulWatt® Proprietary Information. Patent Protected. 2021/06/18 Unauthorized Photocopy and Duplication Prohibited. This document contains information of a product under development. Joulwatt reserves the right to change this product without notice. 2 JW5393/JW5393F JoulWatt ABSOLUTE MAXIMUM RATING1） VIN, EN Pin………................................................................................................................ -0.3V to 20V SW Pin…………………………..………………………………….-0.3V(-5V for 10ns) to 20V(22V for 10ns) BST Pin...................................................................................................................... SW-0.3V to SW+4V All other Pins ........................................................................................................................... -0.3V to 4V Junction Temperature2) ..................................................................................................................150ºC Lead Temperature ............................................................................................................................260ºC Storage Temperature .......................................................................................................-65ºC to +150ºC RECOMMENDED OPERATING CONDITIONS3） Input Voltage VIN .....................................................................................................................4.5V to 18V Output Voltage VOUT .......................................................................................................0.8V to VIN*Dmax Operating Junction Temperature………………………………………………………………-40ºC to +125ºC THERMAL PERFORMANCE4） θJA θJc SOT563..............................................................................................................................145…...45ºC/W Note： 1) 2) 3) 4) Exceeding these ratings may damage the device. These stress ratings do not imply function operation of the device at any other conditions beyond those indicated under RECOMMENDED OPERATING CONDITIONS. The JW5393 and JW5393F include thermal protection that is intended to protect the device in overload conditions. Continuous operation over the specified absolute maximum operating junction temperature may damage the device. The device is not guaranteed to function outside of its operating conditions. Measured on JESD51-7, 4-layer PCB. JW5393/JW5393F Rev.0.1 JoulWatt® Proprietary Information. Patent Protected. 2021/06/18 Unauthorized Photocopy and Duplication Prohibited. This document contains information of a product under development. Joulwatt reserves the right to change this product without notice. 3 JW5393/JW5393F JoulWatt ELECTRICAL CHARACTERISTICS VIN=12V, TJ=25°C, unless otherwise stated. Item Symbol Conditions Typ. Max. Unit 4.0 4.2 4.5 V VIN Under Voltage Lock-out Threshold VIN_MIN VIN Under Voltage Lock-out Hysteresis VIN_MIN_HYST Shutdown Supply Current ISD VEN=0V Supply Current IQ VEN=5V, VFB=1.2V Feedback Voltage VFB FB Leakage Current IFB Top Switch Resistance RDS(ON)T 65 mΩ Bottom Switch Resistance RDS(ON)B 38 mΩ Top Switch Leakage Current ILEAK_TOP Bottom Switch Leakage Current ILEAK_BOT Bottom Switch Current Limit ILIM_BOT Negative Current Limit ILIM_NEG Minimum On Time5) VIN rising Min. 350 mV 1 μA 150 220 μA 4.5≤VVIN≤18V 792 800 808 mV Tj=-40 ºC~125 ºC 784 800 816 mV 100 nA VFB=0.85V VIN=18V, VEN=0V, VSW=0V VIN=18, VEN=0V, VSW=18V JW5393F 1 μA 4 μA 3 3.5 4 A -1.27 -1.5 -1.72 A TON_MIN ns 120 ns 4 us Minimum Off Time TOFF_MIN Maximum On Time TON_Max EN Rising Threshold VEN_H VEN rising 1.1 1.2 1.3 V EN Falling Threshold VEN_L VEN falling 0.98 1.05 1.12 V Switching Frequency FSW 480 600 720 kHz Soft-Start Period5)6) tSS 1 1.4 2 ms Thermal Shutdown5) 5) Thermal Shutdown Hysteresis VFB=0.4V 100 TTSD 160 °C TTSD_HYST 20 °C Note： 5) 6) Guaranteed by design. Soft-Start Period is tested from 10% to 90% of the steady state output voltage. VOUT tSS 90% 10% tSS Waveform JW5393/JW5393F Rev.0.1 JoulWatt® Proprietary Information. Patent Protected. 2021/06/18 Unauthorized Photocopy and Duplication Prohibited. This document contains information of a product under development. Joulwatt reserves the right to change this product without notice. 4 JW5393/JW5393F JoulWatt PIN DESCRIPTION Name SOT563 Description Input voltage pin. VIN supplies power to the IC. Connect a 4.5V to 18V supply to VIN and 1 VIN bypass VIN to GND with a suitably large capacitor to eliminate noise on the input to the IC. SW is the switching node that supplies power to the output. Connect the output LC filter 2 SW 3 GND 4 BST 5 EN 6 FB from SW to the output load. Ground pin. Connect a 0.1μF capacitor between BST and SW pin to supply current for the top switch driver. Drive EN pin high to turn on the regulator and low to turn off the regulator. Output feedback pin. FB senses the output voltage and is regulated by the control loop to 0.8 V. Connect a resistive divider at FB. BLOCK DIAGRAM VIN + Current Sensor VCC BST On Timer Adjustment - FB + 0.8V + Internal Soft Start 1.2V SW Logic Control FB Comparator LDO - + Current Sensor EN + - GND JW5393/JW5393F Rev.0.1 JoulWatt® Proprietary Information. Patent Protected. 2021/06/18 Unauthorized Photocopy and Duplication Prohibited. This document contains information of a product under development. Joulwatt reserves the right to change this product without notice. 5 JW5393/JW5393F JoulWatt FUNCTIONAL DESCRIPTION JW5393 and JW5393F are synchronous step-down regulators based on I2 control architecture. It regulates input voltages from 4.5V to 18V down to an output voltage as low as 0.8V, and is capable of supplying up to 3A of load current. Shut-Down Mode The regulator shuts down when voltage at EN pin is driven below 0.4V. The entire regulator is off and the supply current consumed by the regulator drops below 1μA. Power Switch N-Channel MOSFET switches are integrated on the JW5393 and JW5393F to down convert the input voltage to the regulated output voltage. Since the top MOSFET needs a gate voltage great than the input voltage, a boost capacitor connected between BST and SW pins is required to drive the gate of the top switch. The boost capacitor is charged by the internal 3.3V rail when SW is low. VIN Under-Voltage Protection A resistive divider can be connected between VIN and ground, with the central tap connected to EN, so that when VIN drops to the pre-set value, EN drops below 1.05V to trigger input under voltage lockout protection. Output Current Run-Away Protection At start-up, due to the high voltage at input and low voltage at output, current inertia of the output inductor can be easily built up, resulting in a large start-up output current. A valley current limit is designed in JW5393 and JW5393F so that only when output current drops below the valley current limit can the top power switch be turned on. By such control mechanism, the output current at start-up is well controlled. Output Short Protection When the output is shorted to ground, the regulator is allowed to switch for 2048 cycles. If the short condition is cleared within this period, then the regulator resumes normal operation. If the short condition is still present after 2048 switching cycles, then no switching is allowed and the regulator enters hiccup mode for 6144 cycles. After the 6144 hiccup cycles, the regulator will try to start-up again. If the short condition still exists after 2048 cycles of switching, the regulator enters hiccup mode. This process of start-up and hiccup iterate itself until the short condition is removed. Thermal Protection When the temperature of the regulator rises above 160°C, it is forced into thermal shut-down. Only when core temperature drops below 140°C can the regulator become active again. JW5393/JW5393F Rev.0.1 JoulWatt® Proprietary Information. Patent Protected. 2021/06/18 Unauthorized Photocopy and Duplication Prohibited. This document contains information of a product under development. Joulwatt reserves the right to change this product without notice. 6 JW5393/JW5393F JoulWatt APPLICATION INFORMATION Output Voltage Set The output voltage is determined by the resistor divider connected at the FB pin, and the voltage ratio is: RL VFB = VOUT ∗ RH + RL where VFB is the feedback voltage and VOUT is the output voltage. If RL is determined, and then RH can be calculated by: VOUT RH = RL ∗ ( − 1) 0.8 VOUT the switching frequency, △VIN is the input ripple voltage. The input capacitor can be electrolytic, tantalum or ceramic. To minimizing the potential noise, a small X5R or X7R ceramic capacitor, i.e. 0.1μF, should be placed as close to the IC as possible when using electrolytic capacitors. A 22μF/25V ceramic capacitor is recommended in typical application. Output Capacitor The output capacitor is required to maintain the DC output voltage, and the capacitance value determines the output ripple voltage. The output voltage ripple can be calculated by: RL ∆VOUT = FB VOUT VOUT 1 ∗ (1 − ) ∗ (R ESR + ) fS ∗ L VIN 8 ∗ fS ∗ COUT RH where COUT is the output capacitance value and RESR is the equivalent series resistance value of the output capacitor. Input Capacitor The input capacitor is used to supply the AC input current to the step-down converter and maintaining the DC input voltage. The ripple current through the input capacitor can be calculated by: VOUT VOUT ICIN = IOUT ∗ √ ∗ (1 − ) VIN VIN where IOUT is the load current, VOUT is the output voltage, VIN is the input voltage. Thus the input capacitor can be calculated by the following equation when the input ripple voltage is determined. IOUT VOUT VOUT CIN = ∗ ∗ (1 − ) fS ∗ ∆VIN VIN VIN The output capacitor can be low ESR electrolytic, tantalum or ceramic, which lower ESR capacitors get lower output ripple voltage. The output capacitors also affect the system stability and transient response, and a 22μF~44μF ceramic capacitor is recommended in typical application. Inductor The inductor is used to supply constant current to the output load, and the value determines the ripple current which affect the efficiency and the output voltage ripple. The ripple current is typically allowed to be 40% of the maximum switch current limit, thus the inductance value can be calculated by: where CIN is the input capacitance value, fs is JW5393/JW5393F Rev.0.1 JoulWatt® Proprietary Information. Patent Protected. 2021/06/18 Unauthorized Photocopy and Duplication Prohibited. This document contains information of a product under development. Joulwatt reserves the right to change this product without notice. 7 JW5393/JW5393F L= JoulWatt VOUT VOUT ∗ (1 − ) fS ∗ ∆IL VIN where VIN is the input voltage, VOUT is the output voltage, fs is the switching frequency, and △IL is the peak-to-peak inductor ripple current. External Bootstrap Capacitor 3. The ground plane on the PCB should be as large as possible for better heat dissipation. 4. Keep the switching node SW short to prevent excessive capacitive coupling 5. Make VIN, VOUT and ground bus connections as wide as possible. This reduces any voltage drops on the input or output paths of the converter and maximizes efficiency. The bootstrap capacitor is required to supply voltage to the top switch driver. A 0.1μF low ESR ceramic capacitor is recommended to connected to the BST pin and SW pin. PCB Layout Note For minimum noise problem and best operating performance, the PCB is preferred to following the guidelines as reference. 1. Place the input decoupling capacitor as close to JW5393/JW5393F (VIN pin and GND pin) as possible to eliminate noise at the input pin. The loop area formed by input capacitor and GND must be minimized. 2. Put the feedback trace as short as possible, and far away from the inductor and noisy power traces like SW node. Figure 1. PCB Layout Recommendation JW5393/JW5393F Rev.0.1 JoulWatt® Proprietary Information. Patent Protected. 2021/06/18 Unauthorized Photocopy and Duplication Prohibited. This document contains information of a product under development. Joulwatt reserves the right to change this product without notice. 8 JW5393/JW5393F JoulWatt PACKAGE OUTLINE SOT563 UNIT: mm MILLIMETER D θ SYMBOL MIN NOM MAX A 0.525 — 0.60 A1 0.00 — 0.05 b 0.17 0.22 0.27 c 0.09 — 0.18 D 1.50 1.60 1.70 E 1.50 1.60 1.70 E1 1.10 1.20 1.30 e 0.45 0.50 0.55 L 0.10 0.20 0.30 L1 0.20 0.30 0.4 c A θ A1 L L1 E1 E θ b 9°REF e QUADRANT ASSIGNMENTS FOR PIN 1 ORIENTATION IN TAPE Sprocket Holes 1 2 1 2 1 2 3 4 3 4 3 4 Procket Quadrants Package Type Pin1 Quadrant SOT563 3 JW5393/JW5393F Rev.0.1 JoulWatt® Proprietary Information. Patent Protected. 2021/06/18 Unauthorized Photocopy and Duplication Prohibited. This document contains information of a product under development. Joulwatt reserves the right to change this product without notice. 9 JW5393/JW5393F 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 © 2021 JW5393/JW5393F Incorporated. All rights are reserved by Joulwatt Technology Inc. JW5393/JW5393F Rev.0.1 JoulWatt® Proprietary Information. Patent Protected. 2021/06/18 Unauthorized Photocopy and Duplication Prohibited. This document contains information of a product under development. Joulwatt reserves the right to change this product without notice. 10