SY8263AIC

SY8263 High Efficiency Fast Response, 3A, 30V Input Synchronous Step Down Regulator General Description Features The SY8263 develops a high efficiency synchronous step-down DC/DC converter capable of delivering 3A load current. The SY8263 operates over a wide input voltage range from 4.5V to 30V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.  Low RDS(ON) for Internal Switches (Top/Bottom): 110/70 mΩ  4.5-30VInput Voltage Range  Internal Compensation  Internal 1ms Soft-start Limits the Inrush Current  Adjustable Switching Frequency Range: 500kHz to 2.5MHz  3A Output Current Capability  1.5% 0.6V Reference  Low Quiescent Current  Cycle-by-cycle Peak Current Limit  Short Circuit Protection  Thermal Shutdown and Auto Recovery  RoHS Compliant and Halogen Free  Compact Package: TSOT23-8 The SY8263 adopts peak current control scheme. The switching frequency is adjustable from 500kHz to 2.5MHz using an external resistor. The device also features ultra low quiescent operating to achieve high efficiency under light load. And the internal soft-start limits inrush current during power on. 芯 SY8263 is available in TSOT23-8 package. 导 小 Ordering Information SY8263 □(□□)□ l-F or 半 Temperature Code Package Code Optional Spec Code Package type TSOT23-8 Note --       LCD-TV SetTop Box Notebook Storage High Power AP Router Networking en tia Ordering Number SY8263AIC Applications fid Typical Applications ON/ OFF CBS BS IN CIN R1 FB R2 EN 80 VOUT L LX C1(opt.) COUT Efficiency (%) Sil erg VIN yC on Efficiency vs. Load Current 100 60 40 VIN=9V, VOUT=5V VIN=12V, VOUT=5V VIN=24V, VOUT=5V FS GND RFS 20 0 1 10 100 1000 10000 Load Current (mA) Figure 1. Schematic Diagram SY8263 Rev. 0.9 Figure 2. Efficiency vs. Load Current Silergy Corp. Confidential- Prepared for Customer Use Only 1 SY8263 Pinout (top view) Top Mark: Pin Number 1 FS 2 EN 8 GND 3,4 IN LX BS 5 6 7 1 8 EN FS 2 7 BS GND 3 6 LX GND 4 5 IN bBxyz (Device code: bB, x=year code, y=week code, z= lot number code) Pin Description Output feedback pin. Connect this pin to the center point of the output resistor divider (as shown in Figure 1) to program the output voltage: V OUT=0.6*(1+R1/R2) Frequency programming pin. Connect a resistor to ground to program a switching frequency between 500kHz to 2.5MHz. The switching frequency equals to: Fsw=105/RFS kHz, where RFS is in kΩ. Enable control. Pull high to turn on. Do not float. Ground pin. 芯 Pin Name FB FB Sil erg yC on fid en tia l-F or 半 导 小 Input pin. Decouple this pin to GND pin with at least 4.7uF ceramic cap. Inductor pin. Connect this pin to the switching node of inductor. Boot-strap pin. Supply high side gate driver. Decouple this pin to LX pin with 10nF ceramic cap. SY8263 Rev. 0.9 © 2018 Silergy Corp. Silergy Corp. Confidential- Prepared for Customer Use Only 2 All Rights Reserved. SY8263 Block Diagram IN HS Current Sense Comp Internal Power Input UVLO HS current Limitation VCC BS HSFET VCC EN LX Enable Threshold PWM Control & Protect Logic Internal clock FS LS Current Sense VCC LSFET HS Current Sense Slope Compensation GND Internal SST Comp Comp VREF Rc Error Amp SCP OTP 半 导 小 Cc 芯 LS current Limitation FB Absolute Maximum Ratings (Note 1) Sil erg yC on fid en tia l-F or IN to GND ---------------------------------------------------------------------------------- ------------- -0.3V to 33V LX, FB, EN, FS to GND------------------------------------------------------------------------------------------ -0.3V to 33V BS-LX ------------------------------------------------------------------------------ ------------- 4V Power Dissipation, PD @ T A = 25°C TSOT23-8 ------------------------------------------------------------ 2W Package Thermal Resistance (Note 2) θ JA -------------------------------------------------------------------------------------------------------------- 60.2°C/W θ JC --------------------------------------------------------------------------------------------------------------- 11.2°C/W Junction Temperature Range ------------------------------------------------------------------------------------------------ 150°C Ambient Temperature Range ------------------------------------------------------------------------------------- -40°C to 105°C Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------------ 260°C Storage Temperature Range -------------------------------------------------------------------------------------- -65°C to 150°C Recommended Operating Conditions (Note 3) Supply Input Voltage -------------------------------------------------------------------------------------------------- 4.5V to 30V SY8263 Rev. 0.9 © 2018 Silergy Corp. Silergy Corp. Confidential- Prepared for Customer Use Only 3 All Rights Reserved. SY8263 Electrical Characteristics (VIN = 12V, VOUT = 5V, COUT = 47uF, TA = 25°C, IOUT = 1A unless otherwise specified) Symbol VIN IQ ISHDN VREF Test Conditions IFB RDS(ON)1 RDS(ON)2 ILIM,TOP VENL VENH VUVLO VHYS FOSC VFB=VCC 0.591 1 0.6 Max 30 19 2 0.609 Unit V µA µA V 50 nA mΩ mΩ A V V V V MHz 110 70 4 0.6 6.8 1.5 4.35 0.2 0.5 RFS=200k -15 半 TSD Typ -50 导 小 TSS Min 4.5 IOUT=0, VFB=VREF*105% EN=0 芯 Parameter Input Voltage Range Quiescent Current Shutdown Current Feedback Reference Voltage FB Input Current Top FET RON Bottom FET RON Top FET Current Limit EN Low threshold EN High Threshold Input UVLO threshold UVLO hysteresis Oscillator Frequency Program Range Oscillator Frequency Accuracy Soft-start Time Min ON Time Min OFF Time Thermal Shutdown Temperature Thermal Shutdown Hysteresis %FOSC 1 80 120 150 ms ns ns °C 15 °C tia l-F or TSD,HYS 15 on fid en Note 1: Stresses beyond the “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Sil erg yC Note 2: θ JA is measured in the natural convection at T A = 25°C on a low effective 4-layer thermal conductivity test board of JEDEC 51-3 thermal measurement standard. Pin 2 of TSOT-23-8 packages is the case position for θ JC measurement. Note 3: The device is not guaranteed to function outside its operating conditions. SY8263 Rev. 0.9 © 2018 Silergy Corp. Silergy Corp. Confidential- Prepared for Customer Use Only 4 All Rights Reserved. SY8263 TSOT23-8 Package Outline Drawing Side view A Sil erg yC on fid en tia l-F or 半 导 小 芯 Top view Side view B Notes: Recommended PCB layout (Reference only) All dimension in millimeter and exclude mold flash & metal burr SY8263 Rev. 0.9 © 2018 Silergy Corp. Silergy Corp. Confidential- Prepared for Customer Use Only 5 All Rights Reserved. SY8263 Taping & Reel Specification 1. Taping orientation 芯 TSOT23-8 导 小 Feeding direction Sil erg yC on fid Reel Size en tia l-F or 半 2. Carrier Tape & Reel specification for packages Tape width Pocket Reel size Trailer * Leader * Qty per reel (mm) pitch(mm) (Inch) length(mm) length (mm) (pcs) 8 4 7 400 160 3000 Package types TSOT23-8 3. Others: NA SY8263 Rev. 0.9 © 2018 Silergy Corp. Powered by TCPDF (www.tcpdf.org) Silergy Corp. Confidential- Prepared for Customer Use Only 6 All Rights Reserved.