IR3513Z datasheet(3/36 Pages) IRF

3 / 36 page

IR3513Z

Page 3

May 11, 2009

PIN DESCRIPTION CONTINUED

ROSC/OVP

A resistor to LGND to program the oscillator frequency and the OCSET bias current.

Oscillator frequency equals the phase switching frequency. The pin voltage is 0.6V

during normal operation and higher than 1.6V if over-voltage condition is detected.

CLKOUT

Frequency is equivalent to the phase switching frequency multiplied by the number

of phases. Connect to CLKIN pins of phase ICs.

PHSOUT

Phase timing output switching at the phase frequency. Connect to PHSIN pin of the

first phase IC.

PHSIN

Feedback input of the phase timing clock. Connect to the PHSOUT pin of the last

phase IC.

VCCLFB

Non-inverting input of the voltage regulator error amplifier. Output voltage of the

regulator is programmed by a resistor divider connected to VCCL.

VCCLDRV

Output of the VCCL regulator error amplifier to control an external transistor. The pin

senses the input of the power supply through a resistor at power-up.

VCC

Power Input for under voltage lockout (UVLO) detection and supply for internal IC

circuits.

Return for high-side driver and reference for GATEL non-overlap comparator.

IR3513Z Datasheet(PDF) 3 Page - International Rectifier