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ISL91107IR

更新时间： 2024-09-20 01:06:03
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瑞萨 - RENESAS /
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13页 808K
描述
High Efficiency Buck-Boost Regulator with 4.1A Switches

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ISL91107IR 数据手册

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DATASHEET  
ISL91107IR  
High Efficiency Buck-Boost Regulator with 4.1A Switches  
FN8687  
Rev 0.00  
March 2, 2015  
The ISL91107IR 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 2A of output current  
(PVIN = 2.8V, V  
= 3.3V) and provides excellent efficiency  
• Input voltage range: 1.8V to 5.5V  
OUT  
due to its fully synchronous 4-switch architecture. No-load  
quiescent current of only 45µA also optimizes efficiency under  
light load conditions.  
• Output current: up to 2A (PVIN = 2.8V, V  
• High efficiency: up to 96%  
= 3.3V)  
OUT  
• 45µA quiescent current maximizes light load efficiency  
The ISL91107IR is designed for standalone applications and  
supports 3.3V fixed output voltages 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.  
• 2.5MHz switching frequency minimizes external component  
size  
• Selectable forced PWM mode  
• Fully protected for short-circuit, over-temperature and  
undervoltage  
The ISL91107IR requires only a single inductor and very few  
external components. Power supply solution size is minimized  
by its 2.5MHz switching frequency, allowing small size external  
components.  
• Small 3mmx4mm TQFN package  
Applications  
• Smartphones and tablet PCs  
The ISL91107IR is available in a 3x4 20 Ld TQFN package.  
• Wireless communication devices  
• Optical modules networking equipment  
100  
95  
VIN  
=
ISL91107IRTNZ  
1.8V TO 5.5V  
PVIN  
LX1  
V
= 3.6V  
IN  
L1  
1µH  
C1  
22µF  
90  
85  
80  
75  
70  
65  
60  
V
OUT = 3.3V  
VIN  
LX2  
MODE VOUT  
EN  
V
= 2.7V  
IN  
V
= 4.2V  
IN  
C2  
2x22µF  
V
= 3V  
IN  
FB  
SGND PGND  
V
= 2.5V  
IN  
0.001  
0.01  
0.1  
LOAD CURRENT (A)  
1.0  
3.0  
FIGURE 1. TYPICAL ISL91107IRTNZ APPLICATION  
FIGURE 2. EFFICIENCY vs OUTPUT CURRENT (V  
= 3.3V)  
OUT  
FN8687 Rev 0.00  
March 2, 2015  
Page 1 of 13  
1234567...13

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