The ISL91107IR is a highly-integrated buck-boost switching regulator that accepts input voltages either above or below the regulated output voltage. Unlike other buck-boost regulators, this regulator automatically transitions between operating modes without significant output disturbance.

This device is capable of delivering up to 2A of output current (PVIN = 2.8V, VOUT = 3.3V) and provides excellent efficiency due to its fully synchronous 4-switch architecture. No-load quiescent current of only 45µA also optimizes efficiency under light load conditions.

The ISL91107IR is designed for standalone applications and supports 3.3V fixed output voltages or variable output voltages with an external resistor divider. Output voltages as low as 1V or as high as 5.2V are supported using an external resistor divider.

The ISL91107IR requires only a single inductor and very few external components. Power supply solution size is minimized by its 2.5MHz switching frequency, allowing small size external components. The ISL91107IR is available in a 3x4 20 Ld TQFN package. Alternatively, the ISL91107 is available in a 2.15mmx1.51mm WLCSP package.

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 = 2.8V, VOUT = 3.3V)
  • High efficiency: up to 96%
  • 45µA quiescent current maximizes light load efficiency
  • 2.5MHz switching frequency minimizes external component size
  • Selectable forced PWM mode
  • Fully protected for short-circuit, over-temperature and undervoltage
  • Small 3mmx4mm TQFN package

Applications

  • Smartphones and tablet PCs
  • Wireless communication devices
  • Optical modules networking equipment

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active TQFN Tube 75
Availability
Active TQFN Reel 6000
Availability
Active TQFN Reel 250
Availability
Active TQFN Tube 75
Availability
Active TQFN Reel 6000
Availability
Active TQFN Reel 250
Availability

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL91107IR Datasheet Datasheet PDF 858 KB
User Guides & Manuals
ISL91107IRx-EVZ User Guide Manual PDF 592 KB
Application Notes & White Papers
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 KB

Boards & Kits

Part Number Title Type Company
ISL91107IRA-EVZ High-Efficiency Buck-Boost Regulators with 4.1A Switches Evaluation Board Evaluation Renesas
ISL91107IRN-EVZ High-Efficiency Buck-Boost Regulators with 4.1A Switches Evaluation Board Evaluation Renesas