High Efficiency Buck-Boost Regulator with 4.5A Switches
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Overview
Description
The ISL91127 and ISL91127IR are high-current buck-boost switching regulators for systems using new battery chemistries. They use Renesas' 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.
They 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. The ISL91127 and ISL91127IR have a fully synchronous low ON-resistance, 4-switch architecture and a low quiescent current of only 30µA optimize efficiency under all load conditions.
The ISL91127 and ISL91127IR support stand-alone 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.
The ISL91127 is available in a 20 bump, 0.4mm pitch WLCSP (2.15mmx1.74mm) package, and the ISL91127IR is available in a 20 Ld, 0.5mm pitch QFN (4mmx4mm) package. The 2.5MHz switching frequency 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
- Continuous output current: up to 2.1A (PVIN = 2.5V, VOUT
- High efficiency: up to 96%
- 30µA quiescent current maximizes light-load efficiency
- 2.5MHz switching frequency minimizes external component size
- Fully protected for short-circuit, over-temperature, and undervoltage
- Small 2.15mmx1.74mm WLCSP
Applications
Applications
- Handheld and battery powered consumer and medical devices
- Brownout free system voltage for smartphones and tablet PCs
- Wireless communication devices
- 2G/3G/4G RF power amplifiers
Design & Development
Boards & Kits
Boards & Kits
High-Efficiency Buck-Boost Regulators with 4.5A Switches Evaluation Board
The ISL91127IRA-EVZ platform allows for quick evaluation of the high-performance features of the ISL91127IR buck-boost regulator.
The ISL91127IR is a high-current...
Featured Documents:
High-Efficiency Buck-Boost Regulators with 4.5A Switches Evaluation Board
The ISL91127IRN-EVZ platform allows for quick evaluation of the high-performance features of the ISL91127IR buck-boost regulator.
The ISL91127IR is a high-current...
Featured Documents:
High-Efficiency Buck-Boost Regulators with 4.5A Switches Evaluation Board
The ISL91127IIN-EVZ, ISL91127II2A-EVZ and ISL91127IIA-EVZ platforms allow quick evaluation of the high-performance features of the ISL91127 buck-boost regulator series....
Featured Documents:
High-Efficiency Buck-Boost Regulators with 4.5A Switches Evaluation Board
The ISL91127IIN-EVZ, ISL91127II2A-EVZ and ISL91127IIA-EVZ platforms allow quick evaluation of the high-performance features of the ISL91127 buck-boost regulator series....
Featured Documents:
High-Efficiency Buck-Boost Regulators with 4.5A Switches Evaluation Board
The ISL91127IIN-EVZ, ISL91127II2A-EVZ and ISL91127IIA-EVZ platforms allow quick evaluation of the high-performance features of the ISL91127 buck-boost regulator series....
Featured Documents:
Snowflake Ornament Reference Design Featuring Power and Analog Components
Renesas is ready for the cold with a full lineup of power and analog components spec'd to operate down to -40 °C. The snowflake ornament reference design has a series...
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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.
Product Options
Processing table
Part Number |
Pkg. Type |
Carrier Type |
MOQ |
Buy / Sample |
|---|---|---|---|---|
ISL91127II2AZ-T Active Samples Available |
WLCSP-TKCURDL | Reel | 3000 | Get Samples, |
ISL91127II2AZ-T7A Active Samples Available |
WLCSP-TKCURDL | Reel | 250 | Get Samples, |
ISL91127IIAZ-T Active Samples Available |
WLCSP-TKCURDL | Reel | 3000 | Get Samples, |
ISL91127IIAZ-T7A Active Samples Available |
WLCSP-TKCURDL | Reel | 250 | Get Samples, |
ISL91127IINZ-T Active Samples Available |
WLCSP-TKCURDL | Reel | 3000 | Get Samples, |
ISL91127IINZ-T7A Active Samples Available |
WLCSP-TKCURDL | Reel | 250 | Get Samples, |
ISL91127IRAZ-T Active Samples Available |
QFN | Reel | 6000 | Get Samples, |
ISL91127IRAZ-T7A Active Samples Available |
QFN | Reel | 250 | Get Samples, |
ISL91127IRNZ-T Active Samples Available |
QFN | Reel | 6000 | Get Samples, |
ISL91127IRNZ-T7A Active Samples Available |
QFN | Reel | 250 | Get Samples, |
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| How to Conserve Battery Power in IoT Devices | Blog Post | Oct 9, 2020 |
