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ISL91110IINZ-T

更新时间： 2024-09-20 00:56:51
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瑞萨 - RENESAS /
页数 文件大小 规格书
12页 797K
描述
High Efficiency Buck-Boost Regulator with 4.5A Switches

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DATASHEET  
ISL91110  
FN8434  
Rev 4.00  
February 5, 2016  
High Efficiency Buck-Boost Regulator with 4.5A Switches  
The ISL91110 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 ISL91110 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  
OUT  
= 3.3V)  
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 35µA optimize efficiency  
under all load conditions.  
• Burst current: up to 3A (PVIN = 3V, V  
600µs, t = 4.6ms)  
= 3.3V, t <  
ON  
OUT  
• High efficiency: up to 96%  
• 35µA quiescent current maximizes light-load efficiency  
• 2.5MHz switching frequency minimizes external component  
size  
The ISL91110 supports standalone 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.  
• Fully protected for short-circuit, over-temperature, and  
undervoltage  
• Small 2.33mmx2.07mm WLCSP  
The ISL91110 is available in a 25-bump, 0.4mm pitch WLCSP  
(2.33mmx2.07mm) and a 2.5MHz switching frequency, which  
further reduces the size of external components.  
Applications  
• Brownout free system voltage for smartphones and tablet  
PCs  
• Wireless communication devices  
• 2G/3G/4G RF power amplifiers  
Related Literature  
• AN1912 “ISL91110IIN-EVZ, ISL91110II2A-EVZ,  
ISL91110IIA-EVZ Evaluation Boards”  
100  
V
= 4.0V  
IN  
ISL91110IINZ  
V
1.8V TO 5.5V  
IN =  
LX1  
95  
90  
85  
80  
75  
PVIN  
C
1
L
1
1µH  
2x10µF  
VOUT = 3.3V  
LX2  
VIN  
EN  
IOUT = UP TO 3A  
V
= 3.6V  
IN  
VOUT  
V
= 3.3V  
IN  
C
2
V
= 3.0V  
IN  
2x22µF  
FB  
MODE  
V
= 2.5V  
IN  
NOTE: Confirm with Intersil Applications Engineer for any deviation  
from a bove circ uit  
1
10  
100  
LOAD CURRENT (mA)  
1000  
FIGURE 1. TYPICAL APPLICATION: V  
OUT  
= 3.3V  
FIGURE 2. EFFICIENCY: V  
OUT  
= 3.3V, T = +25°C  
A
FN8434 Rev 4.00  
February 5, 2016  
Page 1 of 12  
1234567...12

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