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.
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| Type | Title | Date |
| Datasheet | PDF 1.01 MB | |
| Datasheet | PDF 1.50 MB | |
| White Paper | PDF 572 KB 简体中文 | |
| Application Note | PDF 592 KB | |
| Application Note | PDF 509 KB | |
| Application Note | PDF 397 KB | |
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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...
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...
The ISL91127IIN-EVZ, ISL91127II2A-EVZ and ISL91127IIA-EVZ platforms allow quick evaluation of the high-performance features of the ISL91127 buck-boost regulator series....
The ISL91127IIN-EVZ, ISL91127II2A-EVZ and ISL91127IIA-EVZ platforms allow quick evaluation of the high-performance features of the ISL91127 buck-boost regulator series....
The ISL91127IIN-EVZ, ISL91127II2A-EVZ and ISL91127IIA-EVZ platforms allow quick evaluation of the high-performance features of the ISL91127 buck-boost regulator series....
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.
PLP |
Pkg. Type |
Carrier Type |
Moisture Sensitivity Level (MSL) |
Price (USD) | 1ku |
Buy / Sample |
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|---|---|---|---|---|---|---|
| Part Number | ||||||
ISL91127II2AZ-T Active Samples Available |
2033 Dec | WLCSP-TKCURDL | Reel | 1 | Get Samples, | |
ISL91127II2AZ-T7A Active Samples Available
Buy Now
|
2033 Dec | WLCSP-TKCURDL | Reel | 1 | 1.31 | Get Samples, |
ISL91127IIAZ-T Active Samples Available |
2033 Dec | WLCSP-TKCURDL | Reel | 1 | Get Samples, | |
ISL91127IIAZ-T7A Active Samples Available |
2033 Dec | WLCSP-TKCURDL | Reel | 1 | 1.186 | Get Samples, |
ISL91127IINZ-T Active Samples Available |
2033 Dec | WLCSP-TKCURDL | Reel | 1 | Get Samples, | |
ISL91127IINZ-T7A Active Samples Available
Buy Now
|
2033 Dec | WLCSP-TKCURDL | Reel | 1 | 1.538 | Get Samples, |
ISL91127IRAZ-T Active Samples Available |
2033 Dec | QFN | Reel | 3 | Get Samples, | |
ISL91127IRAZ-T7A Active Samples Available
Buy Now
|
2033 Dec | QFN | Reel | 3 | 1.5 | Get Samples, |
ISL91127IRNZ-T Active Samples Available |
2033 Dec | QFN | Reel | 3 | Get Samples, | |
ISL91127IRNZ-T7A Active Samples Available
Buy Now
|
2033 Dec | QFN | Reel | 3 | 1.72 | Get Samples, |
| How to Conserve Battery Power in IoT Devices | Blog Post | Oct 9, 2020 |
