SC2618

Miniature PWM Controller www.DataSheet4U.com for Buck Regulator POWER MANAGEMENT Description The SC2618 is a hysteretic mode PWM controller designed for high efficiency, low cost “Point of Load” applications. The hysteretic control scheme allows the use of ceramic output capacitors without the need for compensation components and difficult calculations. An internal soft start prevents output voltage from start up overshoot. A “Hiccup” short circuit protection provides protection against output short circuits as well as adverse input supply sequencing. SC2618 Features ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ Operating Frequency up to 500kHz Input supply from 5V to 12V 0.5A gate drive capability Internal soft start Internal, trimmed bandgap reference (±1%) Hiccup mode short circuit protection Input supply sequence protection 6 lead SOT23 package Applications ‹ Graphics IC Power supplies ‹ Embedded, low cost, high efficiency converters Typical Application Circuit VIN BOOST VCC Q1 VO 5 3 2 6 1 4 Q2 BST VCC GND DH DL FB SC2618 GND GND Revision: September 19, 2005 1 www.semtech.com SC2618 POWER MANAGEMENT Absolute Maximum Ratings www.DataSheet4U.com Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. Exposure to Absolute Maximum rated conditions for extended periods of time may affect device reliability. Parameter Input Supply Voltage Boos...