Datasheet > ISL91127IR

ISL91127IR

更新时间： 2024-11-09 00:59:59

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
12页	984K
描述
High Efficiency Buck-Boost Regulator with 4.5A Switches

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ISL91127IR 数据手册

DATASHEET

ISL91127IR

High Efficiency Buck-Boost Regulator with 4.5A Switches

FN8859

Rev 1.00

August 3, 2016

The ISL91127IR is a high-current buck-boost switching

regulator for systems using new battery chemistries. It uses

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.

Features

• Accepts input voltages above or below regulated output

voltage

• Automatic and seamless transitions between buck and

boost modes

The ISL91127IR is capable of delivering at least 2A continuous

• Input voltage range: 1.8V to 5.5V

output current (V

= 3.3V) over a battery voltage range of

OUT

• Output current: up to 2A (PVIN = 2.5V, V

• High efficiency: up to 96%

= 3.3V)

OUT

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.

Its fully synchronous low ON-resistance, 4-switch architecture

and a low quiescent current of only 30µA optimize efficiency

under all load conditions.

• 30µA quiescent current maximizes light-load efficiency

• 2.5MHz switching frequency minimizes external component

size

• Fully protected for short-circuit, over-temperature and

undervoltage

The ISL91127IR supports 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.

• 20 Ld 4mmx4mm QFN package

Applications

• Handheld and battery powered consumer and medical

devices

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.

• Brownout free system voltage for smartphones and tablet

PCs

Related Literature

• UG080, “ISL91127IRN-EVZ, ISL91127IR2A-EVZ,

ISL91127IRA-EVZ Evaluation Boards User Guide”

• Wireless communication devices

• 2G/3G/4G RF power amplifiers

100

ISL91127IRNZ

1.8V TO 5.5V

IN =

LX1

PVIN

1µH

10µF

LX2

_OUT= 3.3V

VIN

VOUT

VIN = 2.5V

2x22µF

VIN = 3.3V

MODE

VIN = 3.6V

SGND PGND

VIN = 4V

100

1000

LOAD CURRENT (mA)

FIGURE 1. TYPICAL APPLICATION: V

OUT

= 3.3V

FIGURE 2. EFFICIENCY: V = 3.3V, T = +25°C

OUT A

FN8859 Rev 1.00

August 3, 2016

Page 1 of 12

12 3 4 5 6 7...12

中文翻译

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与ISL91127IR相关器件

型号	品牌	获取价格	描述	数据表
ISL91127IRA-EVZ	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.5A Switches
ISL91127IRAZ-T	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.5A Switches
ISL91127IRAZ-T7A	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.5A Switches
ISL91127IRN-EVZ	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.5A Switches
ISL91127IRNZ-T	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.5A Switches
ISL91127IRNZ-T7A	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.5A Switches
ISL91128	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.5A Switches and I2C Interface
ISL91128IIN-EVKIT1Z	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.5A Switches and I2C Interface
ISL91128IIN-EVZ	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.5A Switches and I2C Interface
ISL91128IINZ-T	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.5A Switches and I2C Interface

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