SY8201ABC

昱灿电子 www.szyucan.com  SY8201 High Efficiency Fast Response, 1A, 27V Input Synchronous Step Down Regulator Preliminary Specification General Description Features SY8201 develops high efficiency synchronous stepdown DC-DC converter capable of delivering 1A . SY8201 operates over a wide input voltage range from 4.5V to 27V and integrate main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. • Low RDS(ON) for internal switches (top/bottom):350/150 mΩ • 4.5-27V input voltage range • Instant PWM architecture to achieve fast transient responses Internal softstart limits the inrush current • 2% 0.6V reference • RoHS Compliant and Halogen Free • Compact package: SOT23-6 SY8201 adopts the instant PWM architecture to achieve fast transient responses for high step down applications and high efficiency at light loads. In addition, it operates at pseudo-constant frequency of 500 kHz under heavy load conditions to minimize the size of inductor and capacitor. Ordering Information SY8201□(□□)□ Temperature Code Package Code Optional Spec Code Temperature Range: -40°C to 85°C Ordering Number SY8201ABC Package type SOT23-6 Applications • • • • • Set Top Box Portable TV Access Point Router DSL Modem LCD TV Note -- Typical Applications Efficiency vs. Load Current 94 Efficiency (%) 1 92 90 88 86 84 12VIN,5.0VOUT 2 82 16VIN,5.0VOUT 80 24VIN,5.0VOUT 78 0 0.2 0.4 0.6 0.8 1 Load Current (A) Figure 1. Schematic Diagram SY8201 Rev.2 Figure 2. Efficiency vs Load Current 1 昱灿电子 www.szyucan.com  SY8201 Pinout (top view) (SOT23-6) Top Mark: ENxyz, (Device code: EN, x=year code, y=week code, z= lot number code) Pin Name Pin Number BS 1 GND 2 FB 3 EN IN LX 4 5 6 Pin Description Boot-Strap Pin. Supply high side gate driver. Decouple this pin to LX pin with 0.1uF ceramic cap. Ground pin Output Feedback Pin. Connect this pin to the center point of the output resistor divider (as shown in Figure 1) to program the outpu Vout=0.6*(1+R1/R2) Enable control. Pull high to turn on. Do not float. Input pin. Decouple this pin to GND pin with at least 1uF ceramic cap Inductor pin. Connect this pin to the switching node of inductor Absolute Maximum Ratings (Note 1) Supply Input Voltage ----------------------------------------------------------------------------------------- 30V LX, EN Voltage------------------------------------------------------------------------------------------------ VIN + 0.3V FB, BS-LX Voltage--------------------------------------------------------------------------------------------- 4V Power Dissipation, PD @ TA = 25°C SOT23-6, ----------------------------------------------------------- 0.6W Package Thermal Resistance (Note 2) θ JA ---------------------------------------------------------------------------------------------------- 250°C/W θ JC ---------------------------------------------------------------------------------------------------- 130°C/W Junction Temperature Range -------------------------------------------------------------------------------- 150°C Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------- 260°C Storage Temperature Range --------------------------------------------------------------------------------- -65°C to 150°C Dynamic LX voltage in 50ns duration ---------------------------------------------------------------------IN+3V to GND-4V Recommended Operating Conditions (Note 3) Supply Input Voltage ----------------------------------------------------------------------------------------- 4.5V to 27V Junction Temperature Range -------------------------------------------------------------------------------- -40°C to 125°C Ambient Temperature Range -------------------------------------------------------------------------------- -40°C to 85°C SY8201 Rev.2 2 昱灿电子 www.szyucan.com  SY8201 Electrical Characteristics (VIN = 12V, VOUT = 1.2V, L = 2.2uH, COUT = 10uF, TA = 25°C, IOUT = 1A unless otherwise specified) Parameter Input Voltage Range Quiescent Current Shutdown Current Feedback Reference Voltage FB Input Current Top FET RON Bottom FET RON Bottom FET Valley Current Limit EN Rising Threshold EN Falling Threshold Input UVLO Threshold UVLO Hysteresis On Time Min ON Time Min Off Time Thermal Shutdown Temperature Thermal Shutdown Hysteresis Symbol VIN IQ ISHDN Test Conditions IOUT=0, VFB=VREF×105% EN=0 0.588 VREF IFB RDS(ON)1 RDS(ON)2 Min 4.5 VFB=VIN Typ 400 5 0.6 -50 Max 27 10 0.612 50 0.35 0.15 ILIM 1.5 VENH VENL VUVLO VHYS TON 1.5 TSD THYS nA Ω Ω A 0.4 200 50 100 150 V V V V ns ns ns °C 15 °C 0.4 4.5 VIN = 12V ,VOUT=1.2V, IOUT = 1A Unit V µA µA Note 1: Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. Note 2: θ JA is measured in the natural convection at TA = 25°C on a low effective single layer thermal conductivity test board of JEDEC 51-3 thermal measurement standard. Pin 2 of SOT23-6 packages is the case position for θ JC measurement. Test condition: Device mounted on 2” x 2” FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top layer and thermal vias to bottom layer ground plane. Note 3: The device is not guaranteed to function outside its operating conditions. SY8201 Rev.2 3 昱灿电子 www.szyucan.com  SY8201 SOT23-6 Package Outline & PCB layout 1.90 1.50 - 1.70 1.00 2.70 - 3.00 2.40 2.80 - 3.10 0.95 0.60 0.30 - 0.50 0.1 - 0.15 0.01 - 0.1 Top View 0.25 REF Recommended Pad Layout 1.0 - 1.3 0.95 TYP 0.3 - 0.6 Notes: SY8201 Rev.2 1.90 TYP All dimension in MM All dimension do not include mold flash & metal burr 4 昱灿电子 www.szyucan.com  SY8201 Taping & Reel Specification 1. SOT23-6 taping orientation 3.9/4.1 7.7/8.3 1.45/1.55 Feeding direction 2. Carrier Tape & Reel specification for packages Reel Width Reel Size Package types Tape width (mm) Pocket pitch(mm) Reel size (Inch) Reel width(mm) Trailer length(mm) Leader length (mm) Qty per reel SOT23-6 8 4 7" 8.4 280 160 3000 3. Others: NA SY8201 Rev.2 5