Highly-Integrated Buck-Boost Switching Regulator Evaluation Board
The ISL91108IIA-EVZ evaluation platform allows for quick evaluation of the ISL91108 highly-integrated buck-boost switching regulator that accepts input voltages either...
Overview
Description
The ISL91108 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 2.7A of burst current (PVIN = 3V, VOUT = 3.3V), and provides excellent efficiency due to its fully synchronous 4-switch architecture. A no-load quiescent current of only 27.5µA also optimizes efficiency under light-load conditions. Forced PWM and/or synchronization to an external clock may also be selected for noise-sensitive applications.
The ISL91108 is designed for standalone applications and supports a 3.3V fixed output voltage 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 ISL91108 requires only a single inductor and very few external components. A power supply solution size is minimized by a 2.34mm x 1.72mm WLCSP and a 2.6MHz switching frequency, which further reduces the size of external components.
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 1.6A DC (PVIN = 2.8V, VOUT = 3.3V)
- Burst current: up to 2.7A (PVIN = 3V, VOUT = 3.3V, tON<600µs, t = 4.6ms)
- High efficiency: up to 95%
- 27.5µA quiescent current maximizes light load efficiency
- 2.6MHz switching frequency minimizes the external component size
- Selectable forced PWM mode and external synchronization
- Fully protected from short-circuit, over-temperature, and undervoltage
- Small 2.34mm x 1.72mm WLCSP
Comparison
Applications
Applications
- Smartphones and tablets
- Wireless communication devices
- 2G/3G/4G power amplifiers
Documentation
= Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 627 KB | |
| Product Change Notice | PDF 182 KB | |
| Application Note | PDF 592 KB | |
| Application Note | PDF 509 KB | |
| Application Note | PDF 397 KB | |
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Design & Development
Software & Tools
Software & Tools
| Software title
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Software type
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Company
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| iSim:PE Offline Simulation Tool iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.
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Simulator | Renesas |
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Boards & Kits
Highly-Integrated Buck-Boost Switching Regulator Evaluation Board
The ISL91108IIN-EVZ evaluation platform allows for quick evaluation of the ISL91108 highly-integrated buck-boost switching regulator that accepts input voltages either...
Featured Documents:
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
ISL91108IIAZ-T Active Samples Available |
WLCSP-TKCURDLBC | Reel | 1 | Get Samples, | |
ISL91108IIAZ-T7A Active Samples Available
Buy Now
|
WLCSP-TKCURDLBC | Reel | 1 | 1.284 | Get Samples, |
ISL91108IINZ-T Active Samples Available |
WLCSP-TKCURDLBC | Reel | 1 | Get Samples, | |
ISL91108IINZ-T7A Active Samples Available
Buy Now
|
WLCSP-TKCURDLBC | Reel | 1 | 1.439 | Get Samples, |
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