60V, 3A, Asynchronous Step-Down    Converter with Programmable Frequency

DESCRIPTION

The EUP3253 is a 60V, 3A, step down regulator with

an integrated high side MOSFET. The EUP3253

adopting the peak current mode control, supports the

PSM mode which assists the converter on achieving

high efficiency at light load or standby condition.

The EUP3253 features programmable switching

frequency from 100 kHz to 2MHz with an external

resistor, which provides the flexibility to optimize either

efficiency or external component size. The converter

supports external clock synchronization with a

frequency band from 160 kHz to 2MHz. The EUP3253

allows power conversion from high input voltage to low

output voltage with a minimum 130ns on-time of high

side MOSFET.

Fault protection includes secondary cycle-by-cycle

current limit, short circuit protection and thermal

shutdown. Internal soft-start minimizes the inrush

supply current and the output overshoot at initial startup.

The EUP3253 is available in an 8-pin SOP-8(EP)

package.

Typical Application Circuit

FEATURES

? Wide Input Voltage Range: 4.5V to 60V

? High Efficiency at Light Loads with PSM

Mode

? 150μA Operating Quiescent Current

? 3μA Shutdown Current

? 100kHz to 2MHz Fixed Switching Frequency

? Synchronizes to External Clock

? Adjustable UVLO Voltage and Hysteresis

? 0.8V 1% Internal Voltage Reference

? Internal Soft-start

? Short Circuit Protection

? Thermal Shutdown

? SOP-8(EP) Package     

APPLICATIONS

? Vehicle Accessories : GPS, Entertainment

? 12-V, 24-V, 48-V Industrial, Automotive

and Communications Power Systems

? USB Dedicated Charging Ports and Battery

Chargers