SY20489B
Description
The SY20489B is a high efficiency, synchronous step-up boost converter designed for single-cell lithium (Li-ion or Li-polymer) or two-cell to three-cell nickel (alkaline Ni-Cd or Ni-MH) battery-powered applications. It can operate down to 2.5V input and up to 5.5V output voltage. It uses NMOS for the main switch and PMOS for the synchronous switch.
The SY20489B disconnects the output from the input during shutdown mode. When the input voltage exceeds the regulated output voltage, the SY20489B will enter bypass mode automatically. The low operating current, along with a 0.1µA shutdown current (typ.) makes this device suitable for battery applications where extended battery life is important.
The SY20489B is available in a pact TSOT23-
6 package.
Features
- 2.5V Minimum Input Voltage
- Adjustable Output Voltage from 2.5V to
5.5V
- Minimum 3A Valley Current Limit
- Capable of Seamless Transition between
Boost and Bypass Mode
- Load Disconnect During Shutdown
- Low RDS(ON) at...
