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.

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
  • 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

应用

  • 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

产品选择

器件号 Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active WLCSP-TKCURDL Reel 3000
Availability
Active WLCSP-TKCURDL Reel 250
Availability
Active WLCSP-TKCURDL Reel 3000
Availability
Active WLCSP-TKCURDL Reel 250
Availability
Active WLCSP-TKCURDL Reel 3000
Availability
Active WLCSP-TKCURDL Reel 250
Availability
Active QFN Reel 6000
Availability
Active QFN Reel 250
Availability
Active QFN Reel 6000
Availability
Active QFN Reel 250
Availability

文档和下载

文档标题 其他语言 类型 文档格式 文件大小 日期
数据手册与勘误表
ISL91127IR Datasheet 数据手册 PDF 1.01 MB
ISL91127 Datasheet 数据手册 PDF 1.46 MB
应用指南 &白皮书
如何避免移动设备掉电 English 白皮书 PDF 744 KB
Five Easy Steps to Create a Multi-Load Power Solution 白皮书 PDF 846 KB
AN9208: High Frequency Power Converters 应用文档 PDF 592 KB
AN1681: Grounding Techniques 应用文档 PDF 509 KB
AN1684: Nonideality of Ground 应用文档 PDF 397 KB

开发板与套件

器件号 文档标题 类型 Company
ISL91127IRA-EVZ High-Efficiency Buck-Boost Regulators with 4.5A Switches Evaluation Board 评估 Renesas
ISL91127IRN-EVZ High-Efficiency Buck-Boost Regulators with 4.5A Switches Evaluation Board 评估 Renesas
Snowflake-Ornament-Reference-Design Snowflake Ornament Reference Design Featuring Power and Analog Components 参考 Renesas
ISL91127IIN-EVZ High-Efficiency Buck-Boost Regulators with 4.5A Switches Evaluation Board 评估 Renesas
ISL91127IIA-EVZ High-Efficiency Buck-Boost Regulators with 4.5A Switches Evaluation Board 评估 Renesas
ISL91127II2A-EVZ High-Efficiency Buck-Boost Regulators with 4.5A Switches Evaluation Board 评估 Renesas

新闻及更多资源