SY7072ABC

SY7072 1.8V Minimum Input and 5. 5V Maximum Output High Efficiency 2A Valley Current Synchronous Boost General Description Features • SY7072 is a high efficient, synchronous, step-up Boost converter designed for one-cell Li-Ion or Li-polymer, or a two to three-cell alkaline Ni-Cd or Ni-MH battery powered applications. It can convert down to 1.8V input voltage. It adopts NMOS for the main switch and PMOS for the synchronous switch. • • • • • SY7072 can disconnect the output from input during the shutdown mode. When input voltage exceeds the regulated output voltage, SY7072 enters bypass mode automatically. • • • • Ordering Information Applications SY7072 □(□□)□ Temperature Code Package Code Optional Spec Code Ordering Number SY7072ABC 1.8V Minimum Input Voltage Adjustable Output Voltage from 1.8V to 5.5V Min 2A Valley Current Limit 5µA Typical Quiescent Current Load Disconnect During Shutdown Low RDS(ON) (Main Switch/Synchronous Switch) at 3.3V Output: 100/170mΩ Output OVP Auto Bypass Mode When VIN ≥VOUT RoHS Compliant and Halogen Free Compact Package SOT23-6 Package type SOT23-6 • Note ---- All Single Cell Li or Dual Cell Battery Operated Products as MP-3 Player, PDAs, and Other Portable Equipment. Typical Applications Efficiency vs. Output Current 100 95 L1 VOUT LX CIN IN RFB1 SY7072 FB ON/OFF 90 OUT EN Cff COUT Efficiency (%) VIN 85 80 75 70 65 GND RFB2 VIN =1.8V,VOUT =3.3V VIN =2.2V,VOUT =3.3V VIN =3.0V,VOUT =3.3V 60 55 50 0.001 0.01 0.1 1 Output Current (A) Figure 1. Schematic Diagram SY7072 Rev. 0.9A © 2020 Silergy Corp. Figure 2. Efficiency vs. Load Current Silergy Corp. Confidential- Prepared for Customer Use Only 1 All Rights Reserved. SY7072 Pinout (top view) LX 1 6 IN GND 2 5 OUT FB 3 4 EN (SOT23-6) Top mark: Uyxyz for SY7072ABC (Device code: Uy, x=year code, y=week code, z= lot number code) Pin Name LX GND Pin Number 1 2 FB 3 EN 4 OUT 5 IN 6 Pin Description Inductor node. Connect an inductor between the IN pin and the LX pin. Ground pin. Feedback pin. Connect a resistor RFB1 between OUT and FB, and a resistor RFB2 between FB and GND to program the output voltage. VOUT=1.2V× (RFB1/RFB2+1). Enable pin. Pull high to turn on. Do not leave it floating. Output pin. Decouple this pin to the GND pin with a minimum of 22µF ceramic capacitor. Input pin. Block Diagram IN OUT OUT IN IN VCC Supply 1.75V Linear charge control One Shot Timer FB GM 1.2V Ref R OUT UVLO Q TG PWM Control S Q WELL SWITCH LX BG Zc Current Sense GND EN Enable control Mode Control Figure3. Block Diagram SY7072 Rev. 0.9A © 2020 Silergy Corp. Silergy Corp. Confidential- Prepared for Customer Use Only 2 All Rights Reserved. SY7072 Absolute Maximum Ratings (Note 1) FB, IN, OUT, EN --------------------------------------------------------------------------------------------------- -0.3V to 6.0V （ ） （ ） LX ----------------------------------------------------------------------------------------------------------- -0.3V *1 to 6.0V *2 Power Dissipation, P D @ TA =25°C SOT23-6----------------------------------------------------------------------- 1W Package Thermal Resistance (Note 2) θ JA ----------------------------------------------------------------------------------------------- ---------------- 100°C/W θ JC ------------------------------------------------------------------------------------- ---------------------------- 30°C/W Junction Temperature Range ----------------------------------------------------------------------------------- -40°C to 150°C Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------------- 260°C Storage Temperature Range ---------------------------------------------------------------------------------- -65°C to 150°C (*1) LX Voltage tested down to -3V< 20ns (*2) LX Voltage tested up to +7V< 20ns Recommended Operating Conditions (Note 3) IN -------------------------------------------------------------------------------------------- ---------------------------- 1.8V to 5.5V OUT--------------------------------------------------------------------------------------------------------------------- 1.8V to 5.5V EN ----------------------------------------------------------------------------------------------------------------- 0V to VOUT+0.3V All Other Pins ----------------------------------------------------------------------------------------------------------------- 0-5.5V Junction Temperature Range ------------------------------------------------------------------------------------ -40°C to 125°C Ambient Temperature Range ------------------------------------------------------------------------------------- -40°C to 85°C SY7072 Rev. 0.9A © 2020 Silergy Corp. Silergy Corp. Confidential- Prepared for Customer Use Only 3 All Rights Reserved. SY7072 Electrical Characteristics (VIN =2.4V, VOUT=3.3V, IOUT=500mA, TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Input Voltage Range VIN 1.8 Input UVLO Threshold VUVLO Typ Max 5.5 Unit V 1.65 1.75 V Input UVLO Hysteresis 0.1 V 1 5 0.1 1 µA µA µA Quiescent Current VIN VOUT Shutdown Current VHYS IQ VFB=1.3V,VEN=VIN=2V, VOUT=3.4V VEN=0V,VIN=2.4V Linear Charge Current ISHDN ICHARGE Feedback Reference Voltage VREF Low Side Main FET RON RDS(ON)1 Synchronous FET RON RDS(ON)2 EN Input Voltage High VEN,H EN Input Voltage Low VEN,L EN Leakage Current IEN,LK Min ON Time tON,MIN 60 ns Min OFF Time tOFF,MIN 140 ns Soft-Start Time tSS Switching Frequency FSW Valley Current Limit ILMT,VAL Output Over Voltage Threshold Output Over Voltage Hysteresis Thermal Shutdown Temperature Thermal Shutdown Hysteresis VOUT