SY7120RAC

SY7120 High Efficiency, 16V, 10A Synchronous Step Up Regulator Advanced Design Specification General Description Features SY7120 develops a high efficiency, high power density synchronous Boost regulator. The device adopts adaptive constant OFF time and current mode control. The integrated low RDS(ON) switches minimize the conduction loss. • Input Range: 2.8-16V • Programmable Pseudo-constant Frequency: 300kHz-2MHz • Low RDS(ON) for Internal Switch Main FET: 10mΩ Rectifier FET: 20mΩ • PFM/PWM Selectable Light Load Operation Mode • Internal Loop Compensation • Programmable Peak Current Limit • Internal Soft-start Time Limit the Inrush Current • Input Voltage UVLO • Over Temperature Protection • Over Voltage Protection • RoHS Compliant and Halogen Free • Compact Package:QFN3×3-20 SY7120 provides selectable PFM/PWM light load operation mode. The device features cycle by cycle peak current limit. Low output voltage ripple and small external inductor and capacitor size are achieved with programmable pseudo-constant frequency. Ordering Information SY7120 □(□□ □□)□ □□ □ Tempera ture Code Packa ge Code Optional Spec Code Ordering Number SY7120RAC Package type QFN3×3-20 Applications Note -- • • • • Power Bank High power AP E-Cigarette Bluetooth Speaker Typical Applications Figure 1. Schematic Diagram SY7120 Rev. 0.0 Silergy Corp. Confidential- Prepared for Customer Use Only 1 SY7120 LX LX GND VCC NC Pinout (top view) 20 19 18 17 16 BS 1 15 SVIN OUT 2 14 EN OUT 3 13 MODE OUT 4 12 FS OUT 5 11 FB 8 9 ILMT 10 NC 7 GND LX 6 GND GND (QFN3×3-20) Top Mark: BMFxyz for SY7120RAC (device code: BMF, x=year code, y=week code, z= lot number code) Pin Name BS Pin Number 1 OUT LX GND ILMT 2,3,4,5 6,19,20 7,8,18 5 NC FB 10,16 11 FS 12 MODE 13 EN SVIN VCC 14 15 17 SY7120 Rev. 0.0 Pin Description Boost-strap pin. Supply Rectifier FET’s gate driver. Decouple this pin to the LX pin with a 0.1µF ceramic capacitor The Boost converter output pin. Inductor node. Connect an inductor from power input to the LX pin. Ground pin of the IC. Switch peak current limit setting. Connect a resistor from this pin to GND. ILMT(A)=1200/RILMT(kΩ)-2 Not connected. Feedback pin. Connected to the center of resistor voltage divider to program the output voltage: VOUT=1V×(R1/R2+1) Switching frequency setting pin. Connect a resistor from this pin to ground to program the switching frequency. fS(kHz) = 73565/RFS(kΩ)+300 Operating mode selection under light load. Pull this pin low for PFM operation, and pull this pin high or leave it floating for PWM operation. Enable control. Pull high to turn on the IC. Do not leave it floating. IC power supply input pin. Decouple this pin to the GND pin with a 1µF ceramic capacitor. Output of the internal regulator. Decouple this pin to the GND pin with a 1µF ceramic capacitor. Silergy Corp. Confidential- Prepared for Customer Use Only 2 SY7120 Block Diagram LX BS SVIN LDO Current Sense SVIN UVLO EN PWM Control & Protection Logic OUT VCC 1V FB SST FS MODE ILMT Thermal Sense GND Figure2. Block Diagram Absolute Maximum Ratings (Note 1) SVIN, LX, OUT, ILMT, FS, MODE, EN--------------------------------------------------------------------------- 0.3V to 18V FB, VCC ------------------------------------------------------------------------------------------------------------------------- 4V BS-LX --------------------------------------------------------------------------------------------------------------------------- 4V Power Dissipation, PD @ TA = 25°C QFN3x3-20------------------------------------------------------------------------TBD Package Thermal Resistance (Note 2) θ JA ---------------------------------------------------------------------------------------------------------------- TBD θ JC -----------------------------------------------------------------------------------------------------------------TBD Junction Temperature Range -------------------------------------------------------------------------------- -40°C to 150°C Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------- 260°C Storage Temperature Range --------------------------------------------------------------------------------- -65°C to 150°C Recommended Operating Conditions (Note 3) SVIN-------------------------------------------------------------------------------------------------------------------- 2.8V to 16V Junction Temperature Range ------------------------------------------------------------------------------- -40°C to 125°C Ambient Temperature Range --------------------------------------------------------------------------------- -40°C to 85°C SY7120 Rev. 0.0 Silergy Corp. Confidential- Prepared for Customer Use Only 3 SY7120 Electrical Characteristics (VIN =5V, VOUT=12V, IOUT=100mA, TA = 25°C unless otherwise specified) Parameter Input Voltage Range Quiescent Current Shutdown Current FB Leakage Current Main N-FET RON Rectifier N-FET RON Feedback Reference Voltage SVIN UVLO Rising Threshold SVIN UVLO Hysteresis Output OVP Threshold Main N-FET Current Limit Main N-FET Current Limit Program Range ILMT Reference Voltage EN/MODE Rising Threshold EN/MODE Falling Threshold Switching Frequency Program Range Switching Frequency Accuracy Minimum ON Time Minimum OFF Time Thermal Shutdown Temperature Thermal Shutdown Hysteresis Symbol VSVIN IQ ISHDN IFB RDS(ON)_M RDS(ON)_R VREF Test Conditions Min 2.8 FB=1.1 V EN=0 VFB=3.3V Typ 2.8 V 18 11 10 V V A A 1.2 V V 3.5 50 -50 0.99 RILMT=100kΩ 16 9 2 VILMT VEN/MODE,H 10 20 1 0.2 17 10 0.6 VEN/MODE,L 0.4 fSW,RNG 300 fSW 1.01 Unit V µA µA nA mΩ mΩ V 200 VSVIN,UVLO VSVIN,HYS VOUT,OVP ILMT ILMT,RNG Max 16 RFS=340kΩ 400 V 500 2000 kHz 600 kHz tON,MIN tOFF,MIN TSD 130 80 150 ns ns °C THYS 15 °C 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. 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. Paddle of QFN3x3-20 package is the case position for θ JC measurement. Note 3: The device is not guaranteed to function outside its operating conditions. SY7120 Rev. 0.0 Silergy Corp. Confidential- Prepared for Customer Use Only 4 SY7120 QFN3×3-20 Package Outline Top view Side view Bottom view SY7120 Rev. 0.0 Silergy Corp. Confidential- Prepared for Customer Use Only 5 SY7120 Recommended PCB layout (Reference only) Notes: All dimension in millimeter and exclude mold flash & metal burr. SY7120 Rev. 0.0 Silergy Corp. Confidential- Prepared for Customer Use Only 6 SY7120 Taping & Reel Specification 1. Taping orientation QFN3×3 Feeding direction 2. Carrier Tape & Reel specification for packages Reel Size Package type Tape width (mm) Pocket pitch(mm) Reel size (Inch) Trailer length(mm) Leader length (mm) Qty per reel 12 8 13" 400 400 5000 QFN3x3 3. Others: NA SY7120 Rev. 0.0 Silergy Corp. Confidential- Prepared for Customer Use Only 7