IR3513Z Datasheet, PDF (1/36 Pages) International Rectifier – XPHASE3TM POL CONTROL IC

IR3513Z
DATASHEET
XPHASE3^TM POL CONTROL IC
DESCRIPTION
The IR3513Z Control IC provides overall control of a scalable number of phases along with an internal gate driver,
current sense/sharing, and PWM. This allows the IR3513Z to implement a stand-alone single-phase regulator or
interface with additional Phase ICs to develop a power solution with any number of phases. With this arrangement, the
final solution requires only 1 IC per phase to deploy 1 to X phases. Other approaches require a control IC plus 1 to X
driver ICs or scalable “all-in-one” ICs that do not utilize all IC pins or circuitry leading to increased solution cost and size.
FEATURES
• 0.8V reference supports 0.8V to 5.1V output voltage with +/-0.5% system set point accuracy
• Dynamic margin function provides ± 5 % reference offset
• 1 (stand-alone) to X phase operation with additional Phase IC
• Programmable 250 KHz to 9 Mhz daisy-chain digital phase timing provides a per phase switching
frequency of 250 KHz to 1.5 MHz with no external components
• Differential remote sense amplifier with 100kohm input impedance
• IC bias linear regulator control with programmable output voltage and UVLO
• Programmable converter current limit during soft-start, hiccup with delay during normal operation
• Over voltage protection communicated to Phase ICs
• System over voltage signal protects against failures such as a shorted high side MOSFET
• Detection and protection of open remote sense lines
• Open control loop protection
• 7V/2A gate drivers (4A GATEL sink current)
• Integrated boot-strap synchronous PFET
• Small thermally enhanced 32L 5 x 5mm MLPQ package
APPLICATION CIRCUIT
Page 1
Figure 1 - IR3513Z Application Circuit
May 11, 2009