ZT1525S

ZT1525 3A, 24V Asynchronous Step‐Down DC/DC Converter DESCRIPTION The ZT1525 is a constant frequency peak current‐mode step‐down switching regulator. The range of input voltage is from 4V to 24V. The output current is up to 3A. The switching frequency of the ZT1525 is programmable up to 2.5MHz, to achieve high input/output conversion ratio, and allowing the use of small inductors and ceramic capacitors for miniaturization. Peak current mode PWM control of the ZT1525 provides fast transient response with simple loop compensation. Cycle‐by‐cycle current limiting and hiccup overload protection reduces power dissipation during output overload. Soft‐start function reduces input start up current and prevents the output from overshooting during power up. The ZT1525 is available in the SOP‐8L package, and it is RoHS compliant and 100% lead (Pb) free. ORDERING INFORMATION PART PACKAGE RoHS Ship, Quantity ZT1525S SOP‐8L(EP) Yes Tape and Reel FEATURES ● 4V to 24V input voltage ● Output current up to 3A ● 200kHz to 2.5MHz programmable frequency ● Precision 1V feedback voltage ● Peak current mode control ● Cycle‐by‐cycle current limiting ● Hiccup overload protection with frequency foldback ● Soft‐start and enable ● Thermal shutdown ● RoHS Compliant and 100% Lead (Pb) Free APPLICATIONS ● XDSL and cable modems ● Set top boxes ● Point of load applications ● CPE equipment ● DSP power supplies ● LCD and plasma TVs Pins Configuration Typical Application Circuit DS‐05; Aug. 14, 2009 ‐1‐...