High Efficiency 1.8A Boost Regulator with Input-to-Output Bypass Evaluation Board
The ISL91134IIQ-EVZ evaluation board allows for quick evaluation of the ISL91134 integrated boost switching regulator for battery-powered applications.
The ISL91134...
Overview
Description
The ISL91134 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 = 3V and VOUT = 5V. The no-load quiescent current is only 108µA in Boost mode and 45µA in Forced Bypass mode, which significantly reduces the standby consumption.
The ISL91134 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 ISL91134 is designed to support a fixed output voltage of 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 ISL91134 requires only an inductor and a few external components to operate. The 2.5MHz switching frequency further reduces the size of external components. The ISL91134 is available in a 16-bump, 0.4mm pitch, 1.78mm x 1.78mm WLCSP.
Features
- Input voltage range: 2.35V to 5.4V
- Output current: up to 1.8A (VIN = 3V, VOUT = 5V)
- 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
Comparison
Applications
Applications
- Smartphones and tablet PCs
- Wireless communication devices
- 2G/3G/4G RF power amplifiers
- USB On-The-Go (OTG) power source
Documentation
= Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 687 KB | |
| Application Note | PDF 592 KB | |
| Application Note | PDF 509 KB | |
| Application Note | PDF 397 KB | |
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Design & Development
Boards & Kits
Models
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.
Processing table
ISL91134IIQZ-T Active Samples Available |
WLCSP-TKCURDLBC | Reel | 1 | Get Samples, |
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News & Blog Posts
| Blog Post | Oct 9, 2020 |
