Datasheet > ISL91108

ISL91108

更新时间： 2024-09-20 01:06:03

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
9页	577K
描述
High Efficiency Buck-Boost Regulator with 4.2A Switches

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中文翻译

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ISL91108 数据手册

DATASHEET

ISL91108

FN8448

Rev 1.00

November 12, 2014

High Efficiency Buck-Boost Regulator with 4.2A Switches

The ISL91108 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.

Features

• Accepts input voltages above or below regulated output

voltage

• Automatic and seamless transitions between buck and

boost modes

This device is capable of delivering up to 2.7A of burst current

(PVIN = 3V, V

= 3.3V), and provides excellent efficiency due

• Input voltage range: 1.8V to 5.5V

OUT

to its fully synchronous 4-switch architecture. No load

quiescent current of only 27.5µA also optimizes efficiency

under light-load conditions. Forced PWM and/or

synchronization to an external clock may also be selected for

noise sensitive applications.

• Output current: up to 1.6A DC (PVIN = 2.8V, V

OUT

= 3.3V)

• Burst current: up to 2.7A (PVIN = 3V, V

<600µs, t = 4.6ms)

= 3.3V, t

OUT

• High efficiency: up to 95%

• 27.5µA quiescent current maximizes light load efficiency

The ISL91108 is designed for standalone applications and

supports a 3.3V fixed output voltage 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.

• 2.6MHz switching frequency minimizes external component

size

• Selectable forced PWM mode and external synchronization

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

undervoltage

The ISL91108 requires only a single inductor and very few

external components. Power supply solution size is minimized

by a 2.34mmx1.72mm WLCSP and a 2.6MHz switching

frequency, which further reduces the size of external

components.

• Small 2.34mm x 1.72mm WLCSP

Applications

• Smartphones and tablets

• Wireless communication devices

• 2G/3G/4G power amplifiers

Related Literature

• AN1903 “ISL91108IIA-EVZ/ISL91108IIN-EVZ Evaluation

Board User Guide”

100

4.5VIN

1.8V TO 5.5V

ISL91108IINZ

3.5VIN

PVIN

LX1

1µH

2x10µF

3.0VIN

2.7VIN

2.5VIN

VIN

LX2

= 3.3V

MODE

VOUT

OUT

2x22µF

0.001

0.01

0.1

(A)

OUT

FIGURE 1. TYPICAL FIXED OUTPUT APPLICATION

FIGURE 2. ISL91108IINZ EFFICIENCY vs OUTPUT CURRENT

FN8448 Rev 1.00

November 12, 2014

Page 1 of 9

12 3 4 5 6 7...9

中文翻译

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与ISL91108相关器件

型号	品牌	获取价格	描述	数据表
ISL91108IIA-EVZ	INTERSIL	获取价格	Selectable forced PWM mode and external synchronization
ISL91108IIA-EVZ	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.2A Switches
ISL91108IIAZ-T	INTERSIL	获取价格	Selectable forced PWM mode and external synchronization
ISL91108IIAZ-T	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.2A Switches
ISL91108IIAZ-T7A	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.2A Switches; WLCSP20; Temp Range: -40°
ISL91108IIAZ-T7A	INTERSIL	获取价格	Selectable forced PWM mode and external synchronization
ISL91108IIN-EVZ	INTERSIL	获取价格	Selectable forced PWM mode and external synchronization
ISL91108IIN-EVZ	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.2A Switches
ISL91108IINZ-T	RENESAS	获取价格	High Efficiency Buck-Boost Regulator with 4.2A Switches
ISL91108IINZ-T	INTERSIL	获取价格	Selectable forced PWM mode and external synchronization

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