EC3689 Datasheet, PDF (1/8 Pages) E-CMOS Corporation – 800KHz Synchronous Step-up Converter with 5.5A Switches

800KHz Synchronous Step-up
Converter with 5.5A Switches
EC3689
General Description
Features
The EC3689 devices provide a power supply solution for
products powered by either a one-cell Li-Ion or Li-polymer
battery. The converter generates a stable output voltage
that is either adjusted by an external resistor divider or
fixed internally on the chip. It provides high efficient power
conversion and is capable of delivering output currents up
to 2.1A at 5.3V at a supply voltage down to 2.9V. The
maximum peak current in the step-up switch is limited to a
value of 5.5A. The EC3689 operates at 800KHz switching
frequency and enters pulse-skip-mode (PSM) operation at
light load currents to maintain high efficiency over the
entire load current range. During shutdown, the load is
completely disconnected from the battery.
◆ Synchronous Step-up Converter with 2.1A Output
Current From 2.9V Input
◆ Wide V_IN Range From 2.9V to 5.5V
◆ Input Under-voltage Lockout Protection
◆ Fixed and Adjustable Output Voltage
◆ Built-in Output Over-voltage Protection
◆ Light-Load Pulse Skip Mode
◆ Load Disconnect During Shutdown
◆ Output Short Circuit Protection
◆ Thermal Shutdown Protection
◆ Available in a SOP8(Exposed PAD) Packages
APPLICATIONS
◆ Power Bank
◆ USB Charging Port (5V)
◆ DC/DC Micro Modules
Figure 1. EC3689 Typical Application Circuit
E-CMOS Corp. (www.ecmos.com.tw)
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4E02N-Rev.P001