ISL91110 Datasheet High Efficiency Buck-boost Regulator

Manufacturer: Renesas

Overview: DATASHEET ISL91110 High Efficiency Buck-Boost Regulator with 4.5A Switches FN8434 Rev 4.00 February 5, 2016 The ISL91110 is a high-current buck-boost switching regulator for systems using new battery chemistries. It uses Intersil’s proprietary buck-boost algorithm to maintain voltage regulation while providing excellent efficiency and very low output voltage ripple when the input voltage is close to the output voltage. The ISL91110 is capable of delivering at least 2A continuous output current (VOUT = 3.3V) over a battery voltage range of 2.5V to 4.35V. This maximizes the energy utilization of advanced single-cell Li-ion battery chemistries that have significant capacity left at voltages below the system voltage. Its fully synchronous low ON-resistance 4-switch architecture and a low quiescent current of only 35µA optimize efficiency under all load conditions. The ISL91110 supports standalone applications with a fixed 3.3V or 3.5V output voltage or adjustable output voltage with an external resistor divider. Output voltages as low as 1.0V or as high as 5.2V are supported. The ISL91110 is available in a 25-bump, 0.4mm pitch WLCSP (2.33mmx2.07mm) and a 2.5MHz switching frequency, which further reduces the size of external components.

Datasheet Details

Part number	ISL91110
Manufacturer	Renesas
File Size	790.56 KB
Description	High Efficiency Buck-Boost Regulator
Datasheet	ISL91110-Renesas.pdf

Key Features

Accepts input voltages above or below regulated output voltage.
Automatic and seamless transitions between buck and boost modes.
Input voltage range: 1.8V to 5.5V.
Output current: up to 2A (PVIN = 2.5V, VOUT = 3.3V).
Burst current: up to 3A (PVIN = 3V, VOUT = 3.3V, tON < 600µs, t = 4.6ms).
High efficiency: up to 96%.
35µA quiescent current maximizes light-load efficiency.
2.5MHz switching frequency minimizes external compon.

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