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ISL91128IINZ-T

更新时间： 2024-11-21 02:51:47
品牌 Logo 应用领域
瑞萨 - RENESAS /
页数 文件大小 规格书
17页 999K
描述
High Efficiency Buck-Boost Regulator with 4.5A Switches and I2C Interface

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ISL91128IINZ-T 数据手册

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DATASHEET  
ISL91128  
FN8732  
Rev.3.00  
May 3, 2018  
2
High Efficiency Buck-Boost Regulator with 4.5A Switches and I C Interface  
The ISL91128 is a high-current, buck-boost switching regulator  
Features  
for systems using new battery chemistries. It uses the Renesas  
• Accepts input voltages above or below regulated output  
voltage  
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. The device also includes a selectable Bypass  
mode for low power consumption in applications that have a  
Sleep or Low Power mode.  
• Automatic and seamless transitions between Buck and  
Boost modes  
2
• I C interface  
• Input voltage range: 1.8V to 5.5V  
The ISL91128 is capable of delivering at least 2.2A continuous  
• Continuous output current: up to 2.4A (PVIN = 2.5V,  
output current (V  
= 3.3V) across a battery voltage range of  
OUT  
V
= 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.  
• High efficiency: up to 96%  
• 30µA quiescent current maximizes light-load efficiency  
• Selectable bypass power saving mode operation  
• 2.5MHz switching frequency minimizes external component  
size  
The ISL91128 supports a broader set of programmable  
2
• Fully protected for short-circuit, over-temperature, and  
undervoltage  
features that can be accessed using an I C bus interface. With  
a programmable output voltage range of 1.9V to 5.0V, the  
ISL91128 is ideal for applications requiring dynamically  
changing supply voltages. A programmable slew rate can be  
selected to provide smooth transitions between output voltage  
settings.  
• Small 2.15mmx1.74mm WLCSP  
Applications  
• Brownout-free system voltage for smart phones and tablet  
PCs  
The ISL91128 is available in a 20 bump, 0.4mm pitch WLCSP  
(2.15mmx1.74mm) with a 2.5MHz switching frequency, which  
further reduces the size of external components.  
• Wireless communication devices  
• 2G/3G/4G RF power amplifiers  
Related Literature  
For a full list of related documents, visit our website  
• ISL91128 product page  
100  
ISL91128IINZ  
VIN = 4.2V  
VIN = 3.3V  
VIN = 3.6V  
V
1.8V TO 5.5V  
IN =  
LX1  
PVIN  
95  
90  
85  
80  
75  
L
1µH  
C
1
10µF  
1
LX2  
V
= 3.3V  
VIN  
EN  
OUT  
VOUT  
C
2
VIN = 2.8V  
2x22µF  
FB  
SDA  
SCL  
VIN = 3V  
1
10  
100  
1000  
LOAD CURRENT (mA)  
FIGURE 1. TYPICAL APPLICATION  
FIGURE 2. EFFICIENCY: V  
OUT  
= 3.3V, T = +25°C  
A
FN8732 Rev.3.00  
May 3, 2018  
Page 1 of 17  
1234567...17

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