概览
描述
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.
特性
- 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)
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应用
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| 数据手册 | PDF 778 KB | |
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| 应用说明 | PDF 592 KB | |
| 产品变更通告 | PDF 89 KB | |
| 应用说明 | PDF 509 KB | |
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| iSim:PE 离线模拟工具 iSim Personal Edition（iSim:PE ）可加快设计周期并降低项目早期风险，确定可用于当前和下一代设计的部件。
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Simulator | 瑞萨电子 |
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开发板与套件
评估
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...
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评估
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...
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评估
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.
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