Overview
Description
ISL91110 and ISL91110IR are high-current buck-boost switching regulators for systems using new battery chemistries. They use 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. ISL91110 and ISL91110IR are 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. Their fully synchronous low ON-resistance 4-switch architecture and a low quiescent current of only 35μA optimize efficiency under all load conditions.
ISL91110 and ISL91110IR support 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. ISL91110 and ISL91110IR require 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 ISL91110 is available in a 25-bump, 0.4mm pitch WLCSP (2.33mm x 2.07mm) and the ISL91110IR is available in a 4mm x 4mm, 20 Ld TQFN 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 = 3.4V, VOUT = 5V) (ISL91110IR only)
- Output current: up to 2A (PVIN = 2.5V, VOUT = 3.3V) (ISL91110 and ISL91110IR)
- Burst current: up to 3A (PVIN = 3V, VOUT = 3.3V, tON < 600μs, t = 4.6ms)
- High efficiency: up to 96%
- High efficiency: up to 95% (ISL91110IR only)
- 35μA quiescent current maximizes light- load efficiency
- 2.5MHz switching frequency minimizes external component size
- Fully protected for short-circuit, over-temperature, and undervoltage
- Small 2.33mmx2.07mm WLCSP (ISL91110 only)
- Small 4mmx4mm 20 Ld TQFN package (ISL91110IR only)
Comparison
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 778 KB | |
| Datasheet | PDF 857 KB | |
| Application Note | PDF 592 KB | |
| Product Change Notice | PDF 89 KB | |
| Application Note | PDF 509 KB | |
| Application Note | PDF 397 KB | |
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Design & Development
Software & Tools
Software & Tools
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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
Evaluation
ISL91110IIA-EVZ
Active
High-Current Buck-Boost Switching Regulator Evaluation Board
The ISL91110IIA-EVZ evaluation platform allows for quick evaluation of the high performance features of the ISL91110 buck-boost switching regulator. The ISL91110IIA-EVZ evaluates the ISL91110IIAZ featuring resistor programmable output voltage.
The ISL91110 is a high-current buck-boost...
Recommended Documents:
Evaluation
ISL91110II2A-EVZ
Obsolete
High-Current Buck-Boost Switching Regulator Evaluation Board
The ISL91110II2A-EVZ evaluation platform allows for quick evaluation of the high-performance features of the ISL91110 buck-boost switching regulator. The ISL91110II2A-EVZ evaluates the ISL91110II2AZ featuring 3.5 Vout.
The ISL91110 is a high-current buck-boost switching regulator for systems...
Recommended Documents:
Evaluation
ISL91110IIN-EVZ
Obsolete
High-Current Buck-Boost Switching Regulator Evaluation Board
The ISL91110IIN-EVZ evaluation platform allows for quick evaluation of the high-performance features of the ISL91110 buck-boost switching regulator. The ISL91110IIN-EVZ evaluates the ISL91110IINZ featuring 3.3 Vout.
The ISL91110 is a high-current buck-boost switching regulator for systems...
Recommended Documents:
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
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