IR3513Z

Page 1

May 11, 2009

DATASHEET

XPHASE3

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

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0.8V reference supports 0.8V to 5.1V output voltage with +/-0.5% system set point accuracy

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Dynamic margin function provides ± 5 % reference offset

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1 (stand-alone) to X phase operation with additional Phase IC

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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

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Differential remote sense amplifier with 100kohm input impedance

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IC bias linear regulator control with programmable output voltage and UVLO

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Programmable converter current limit during soft-start, hiccup with delay during normal operation

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Over voltage protection communicated to Phase ICs

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System over voltage signal protects against failures such as a shorted high side MOSFET

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Detection and protection of open remote sense lines

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Open control loop protection

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7V/2A gate drivers (4A GATEL sink current)

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Integrated boot-strap synchronous PFET

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Small thermally enhanced 32L 5 x 5mm MLPQ package

APPLICATION CIRCUIT

Figure 1 - IR3513Z Application Circuit