Overview

The ISL91132 is an integrated boost switching regulator for battery-powered applications. The device provides a power supply solution for products using a one-cell Li-ion or Li-polymer battery. The device is capable of delivering up to 1.8A output current from VIN = 2.5V and VOUT = 3.3V. The no-load quiescent current is only 108µA in Boost mode and 45µA in Forced Bypass mode, which significantly reduces the standby consumption.

The ISL91132 offers a Bypass mode operation where the output is directly connected to the input through a 38mΩ MOSFET to allow a significantly lower dropout voltage. The Bypass mode can be entered by an external command, or by auto bypass. The Forced Bypass mode allows the output voltage to operate close to the input voltage and improves the efficiency under these conditions.

The ISL91132 is designed to support six fixed output voltages ranging from 3.15V to 5V. A voltage select pin is available for each output variant to scale up the output voltage by a small offset to compensate for the load transient droop. The ISL91132 requires only an inductor and a few external components to operate. The 2.5MHz switching frequency further reduces the size of external components. The ISL91132 is available in a 16-bump, 0.4mm pitch, 1.78mm x 1.78mm WLCSP.

ISL91132 Functional Diagram
ISL91132 Functional Diagram
  • Input voltage range: 2.35V to 5.4V
  • Output current: up to 1.8A (VIN = 2.5V, VOUT = 3.3V)
  • Burst current up to 2A (VIN = 2.5V, VOUT = 3.3V, tON < 600µs, T = 4.6ms)
  • High efficiency: up to 96%
  • 108µA quiescent current minimizes standby consumption in Boost mode, 45µA in Forced Bypass mode
  • 2.5MHz switching frequency minimizes the external component size
  • Forced Bypass or Auto Bypass modes with a 38mΩ switch
  • PFM mode at light-load currents
  • Fully protected from overcurrent, over-temperature, and undervoltage
  • Load disconnect when disabled
  • Small 1.78mm x 1.78mm WLCSP

Applications

  • Smartphones and tablet PCs
  • Wireless communication devices
  • 2G/3G/4G RF power amplifiers
  • USB On-The-Go (OTG) power source

Documentation

= Featured Documentation
Type Title Date
Datasheet
ISL91132 Datasheet
PDF 763 KB
Application Note
AN9208: High Frequency Power Converters
PDF 592 KB
Application Note
AN1681: Grounding Techniques
PDF 509 KB
Application Note
AN1684: Nonideality of Ground
PDF 397 KB
4 items

Design & Development

ISL91132IIx-EVZ

Evaluation
Learn More

High Efficiency 1.8A Boost Regulator with Input-to-Output Bypass Evaluation Board

The ISL91132IIx-EVZ evaluation board allows for quick evaluation of the ISL91132 integrated boost switching regulator for battery-powered applications.

The ISL91132...

Featured Documents:
ISL91132 Datasheet

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    Buy / Sample
    Part Number
    ISL91132IILZ-T
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    		 WLCSP-TKCURDLBC Reel 1 Get Samples,
    ISL91132IIMZ-T
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    		 WLCSP-TKCURDLBC Reel 1 Get Samples,
    ISL91132IINZ-T
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    		 WLCSP-TKCURDLBC Reel 1 Get Samples,
    ISL91132IIOZ-T
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    		 WLCSP-TKCURDLBC Reel 1 Get Samples,
    ISL91132IIPZ-T
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    		 WLCSP-TKCURDLBC Reel 1 Get Samples,
    ISL91132IIQZ-T
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    		 WLCSP-TKCURDLBC Reel 1 Get Samples,
    Parametric Table tips

    Tips for Using This Parametric Table:

    • Hide Filters button in header: Collapse or expands filters
    • Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
    • Reset button in header: Reset all filters to the page default
    • Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
    • Export button in header: Export the filtered results of the table to an Excel document
    • Filter parts search bar in header: Type to filter table results by part number
    • Hide column button in column headers: Select to hide columns in table
    • AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
    • Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
    • Document icon next to product name in row: View the featured document for this product
    • Chip icon next to the right of the document icon in row: View the block diagram for this product
    • Cart icon to the right of the chip icon: Indicates that samples are available for this product

    Videos & Training

    News & Blog Posts

    Blog Post Oct 9, 2020