ISL91127IRAZ-T7A

The ISL91127IRAZ-T7A is an adjustable output high efficiency buck-boost regulator with 4.5A switch in 20 pin QFN package. This high current buck-boost switching regulator is suitable for systems using new battery chemistries. It uses buck-boost algorithm to maintain voltage regulation while providing excellent efficiency and very low output voltage ripple when the input voltage is close to output voltage. The ISL91127IR is capable of delivering at least 2A continuous output current (VOUT=3.3V) over battery voltage range of 2.5V to 4.35V. It maximizes the energy utilization of advanced single cell Li-ion battery chemistries that have significant capacity left at voltages below system voltage. Its fully synchronous low ON-resistance, 4-switch architecture and low quiescent current of only 30μA optimize efficiency under all load conditions. It is used in brown-out free system voltage for smart phones and tablet PCs, wireless communication devices & 2G/3G/4G RF power amplifiers.

• Accepts input voltages above or below regulated output voltage
• Automatic and seamless transitions between buck and boost modes
• Output voltage range from 1V to 5.2V and input voltage range from 1.8V to 5.5V
• VIN supply current of 30μA
• High efficiency up to 96%
• 2.5MHz switching frequency minimizes external component size
• Fully protected for short circuit, overtemperature and undervoltage
• Output voltage accuracy of ±2% (VIN = 3.7V, VOUT = 3.3V, IOUT = 0mA, PWM mode)
• Operating temperature range from -40°C to +85°C

Warnings

This device is sensitive to electrostatic discharge, follow proper IC handling procedures. Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.