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 1.2A
- High Efficiency: Up to 95%
- 35µA Quiescent Current Maximizes Light-load Efficiency
- 2.5MHz Switching Frequency Minimizes External Component Size
- Selectable Forced-PWM Mode and External Synchronization
- Fully Protected for Overcurrent, Over-temperature and Undervoltage
- Small 2.4mmx1.6mm WLCSP Package
ISL9110A Functional Diagram
Description
The ISL9110A 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 part is capable of delivering up to 1.2A output current, and provides excellent efficiency due to its fully synchronous 4-switch architecture. No-load quiescent current of only 35µA 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 ISL9110A is designed for standalone applications and supports 3.3V and 5V fixed output voltages 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 ISL9110A requires only a single inductor and very few external components. Power supply solution size is minimized by a 2.4mm x 1.6mm WLCSP package and a 2.5MHz switching frequency, which further reduces the size of external components.
Applications
- Regulated 33V from a Single Li-Ion Battery
- Smart Phones and Tablet Computers
- Handheld Devices
- Point-of-Load Regulators
| Part Number | Status | Samples | Stock | Package | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|
| ISL9110AIITAZ-T | Obsolete | N/A | Out of Stock | WLCSP-BP | 20# | Reel | 1 | Yes | Pb-Free Ball Terminal (SAC405)-e1 | -40 to +85°C |
| ISL9110AIITNZ-T | Obsolete | N/A | In Stock | WLCSP-BP | 20# | Reel | 1 | Yes | Pb-Free Ball Terminal (SAC405)-e1 | -40 to +85°C |
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- Application NotePDF 592 KB an9208 Feb 01, 2018AI-generated Summary: The document discusses high frequency power converters, focusing on ZVS-QRC and multi-resonant topologies that reduce switching losses by operating switches at zero voltage. It highlights challenges like EMI and high voltage stress. The SEPIC converter is introduced, explaining its ability to buck or boost voltage without polarity inversion. The document details SEPIC’s operating modes, voltage-current relationships, and the importance of inductor values for continuous or discontinuous conduction modes.
- Application NotePDF 397 KB an1684 Jan 19, 2004AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design and safety, disclaims liability for damages, and clarifies no intellectual property licenses are granted. Products are categorized by quality grades with specific application recommendations. Users must comply with laws, avoid unauthorized modifications, and ensure safe use within specified conditions. Contact details for Renesas Electronics sales offices worldwide are provided.
- Application NotePDF 509 KB an1681 Jan 19, 2004AI-generated Summary: The document explains grounding techniques for PCB layouts using a dual op amp example on a single-layer copper board. It compares three grounding schemes: a center spine ground trace, an outer ground plane, and a split/star ground plane, highlighting the benefits of single-point grounding to minimize noise and antenna effects. It emphasizes following current paths, minimizing loop lengths, and ensuring close forward and return paths to reduce interference. The document also includes disclaimers on product use, quality grades, safety, and legal compliance.
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- Application NotePDF 592 KB an9208 Feb 01, 2018AI-generated Summary: The document discusses high frequency power converters, focusing on ZVS-QRC and multi-resonant topologies that reduce switching losses by operating switches at zero voltage. It highlights challenges like EMI and high voltage stress. The SEPIC converter is introduced, explaining its ability to buck or boost voltage without polarity inversion. The document details SEPIC’s operating modes, voltage-current relationships, and the importance of inductor values for continuous or discontinuous conduction modes.
- Application NotePDF 397 KB an1684 Jan 19, 2004AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design and safety, disclaims liability for damages, and clarifies no intellectual property licenses are granted. Products are categorized by quality grades with specific application recommendations. Users must comply with laws, avoid unauthorized modifications, and ensure safe use within specified conditions. Contact details for Renesas Electronics sales offices worldwide are provided.
- Application NotePDF 509 KB an1681 Jan 19, 2004AI-generated Summary: The document explains grounding techniques for PCB layouts using a dual op amp example on a single-layer copper board. It compares three grounding schemes: a center spine ground trace, an outer ground plane, and a split/star ground plane, highlighting the benefits of single-point grounding to minimize noise and antenna effects. It emphasizes following current paths, minimizing loop lengths, and ensuring close forward and return paths to reduce interference. The document also includes disclaimers on product use, quality grades, safety, and legal compliance.
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