Synchronous Buck Regulator features 3 A quiescent current.

Press Release Summary:



Housed in 4 x 4 QFN lead-free package, ISL8013A step-down DC/DC converter integrates pair of low ON-resistance P-channel and N-channel internal MOSFETs, and delivers up to 3 A continuous output current from 2.8-5.5 V input. Unit's 100% duty-cycle operation allows less than 300 mV dropout voltage at 3 A output current. PWM switching frequency of 1 MHz allows use of small external components, while SYNC input enables multiple ICs to synchronize out of phase to minimize ripple.



Original Press Release:



ISL8013A



3A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator

The ISL8013A is a high efficiency, monolithic, synchronous step-down DC/DC converter that can deliver up to 3A continuous output current from a 2.8V to 5.5V input supply. It uses a current control architecture to deliver very low duty cycle operation at high frequency with fast transient response and excellent loop stability.

The ISL8013A integrates a pair of low ON-resistance P-Channel and N-Channel internal MOSFETs to maximize efficiency and minimize external component count. The 100% duty-cycle operation allows less than 300mV dropout voltage at 3A output current. High 1MHz pulse-width modulation (PWM) switching frequency allows the use of small external components and SYNC input enables multiple ICs to synchronize out of phase to reduce ripple and eliminate beat frequencies.

The ISL8013A can be configured for discontinuous or forced continuous operation at light load. Forced continuous operation reduces noise and RF interference while discontinuous mode provides high efficiency by reducing switching losses at light loads.

Fault protection is provided by internal hiccup mode current limiting during short circuit and overcurrent conditions, an output over voltage comparator and over-temperature monitor circuit. A power good output voltage monitor indicates when the output is in regulation.

The ISL8013A is offered in a space saving 4x4 QFN lead free package with exposed pad lead frames for low thermal resistance.

The ISL8013A includes a pair of low ON-resistance P-Channel and N-Channel internal MOSFETs to maximize efficiency and minimize external component count. The 100% duty-cycle operation allows less than 300mV dropout voltage at 3A.

The ISL8013A offers a 1ms Power Good (PG) timer at power-up. When shutdown, ISL8013A discharges the output capacitor. Other features include internal soft-start, internal compensation, overcurrent protection, and thermal shutdown.

The ISL8013A is offered in a 4mmx4mm 16 Ld QFN package with 1mm maximum height. The complete converter occupies less than 0.4in2 area.

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