ISL8014

VIN, VDD . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . -0.3V to 6V
EN, SYNCH, PG . . . . . . . . . . . . . . . . . . . . -0.3V to VIN+0.3V
LX. . . . . . . . . . . . . . . . . . . .-1.5V (100ns)/-0.3V (DC) to 6.5V
VFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.7V
Recommended Operating Conditions
VIN Supply Voltage Range . . . . . . . . . . . . . . . . . 2.7V to 5.5V
Load Current Range . . . . . . . . . . . . . . . . . . . . . . . . . 0A to 4A
Ambient Temperature Range. . .. . . . . . . . . . ..-40 to +85
Thermal Resistance (Typical, Notes 1, 2) _JA (/W) _JC (/W)
16 Ld 4x4 QFN Package . . . . . . . . . 40 3
Junction Temperature Range. . . . . . . . . . . . . .-55 to +125
Storage Temperature Range . . . . . . . . . . . . . .-65 to +150
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp


CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty.
NOTE:
1. _JA is measured in free air with the component mounted on a high effective thermal conductivity test board with "direct attach" features. See Tech Brief TB379.
2. _JC, "case temperature" location is at the center of the exposed metal pad on the package underside. See Tech Brief TB379.

The ISL8014 is a high efficiency, monolithic, synchronous step-down DC/DC converter that can deliver up to 4A continuous output current from a 2.7V 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 ISL8014 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 400mV dropout voltage at 4A 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 ISL8014 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 ISL8014 is offered in a space saving 4x4 QFN lead free package with exposed pad lead frames for low thermal.

The ISL8014 offers a 1ms Power Good (PG) timer at power-up. When shutdown, ISL8014 discharges the output capacitor. Other features include internal soft-start, internal compensation, overcurrent protection, and thermal shutdown.

The ISL8014 is offered in a 4mmx4mm 16 Ld QFN package with 1mm maximum height. The complete converter occupies less than 0.4in² area.