1.2MHz Step-Up PWM Controller
The EUP2573 is a compact, high efficiency, fixed
frequency pulse-width-modulation (PWM) controller.
It provides an easy-to-use power supply solution for
the application from one Li-ion battery to 5V output.
All compensation and protection circuitry are
integrated to minimize external components. The
1.2MHz high switching frequency allows smaller
inductor and output capacitor, making the EUP2573
ideally suited for small battery-powered applications
and saves PCB space.
The EUP2573 contains thermal shutdown function and
output short protection circuit. Built-in soft-start
circuitry prevents excessive inrush current during
The EUP2573 is available in a Pb-free, thin-SOT23-5
and SOT23-6 packages.
VDD Range: 2.7V to 5.5V
High Efficiency up to 90%
1.2MHz Fixed Switching Frequency
Tiny External Components
Output Short Protection
<1µA Shutdown Current
3.3V to +5.0V Distributed Power Supply
Single Cell Li-ion Battery to 5V Converter
Available in SOT23-5 and SOT23-6 Packages
RoHS Compliant and 100% Lead (Pb)-Free
One Li-Ion Battery to 5V Output
Typical Application Circuit
DS2573 Ver1.1 Dec. 2012
Figure 1. Connecting VDD to VIN