SY7069

Application Note: SY7069 5.5V Maximum Output, 3A Valley Current, 1MHz Synchronous Boost with Auto Bypass Function General Description SY7069 is a high efficiency, synchronous, step-up boost converter designed for one-cell Li-Ion or Lipolymer, or a two to three-cell alkaline Ni-Cd or NiMH battery powered applications. It can convert down to 2.5V input voltage and up to 5.5V output voltage. It adopts NMOS for the main switch and PMOS for the synchronous switch. SY7069 can disconnect the output from input during the shutdown mode. When input voltage exceeds the regulated output voltage, SY7069 enters bypass mode automatically. Ordering Information SY7069 □(□□)□ Temperature Code Package Code Optional Spec Code Ordering Number SY7069ADC Package type TSOT23-6 Note ---- Features  2.5V minimum input voltage  Adjustable output voltage from 2.5V to 5.5V  Min 3A valley current limit  Capable for seamless transition between boost and bypass mode  Load disconnect during shutdown  Low RDS(ON) (main switch/synchronous switch) at 5.0V output: 50mΩ/90mΩ  Output OVP protection  Compact package TSOT23-6 package Applications  All Single Cell Li or Dual Cell Battery Operated Products as MP-3 Player, PDAs, and Other Portable Equipment. Typical Applications Figure 1. Schematic Diagram AN_SY7069 Rev. 0.9 Silergy Corp. Confidential- Prepared for Customer Use Only 1 SY7069 Pinout (top view) FB 1 6 EN IN 2 5 LX Name FB IN GND OUT LX EN GND 3 4 OUT (TSOT23-6) Top mark: Iexy...