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ISL9120IRTNZ

更新时间： 2024-11-11 01:05:55
品牌 Logo 应用领域
英特矽尔 - INTERSIL /
页数 文件大小 规格书
13页 433K
描述
Compact High Efficiency Low Power Buck-Boost Regulator

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ISL9120IRTNZ 数据手册

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DATASHEET  
Compact High Efficiency Low Power Buck-Boost  
Regulator  
ISL9120IR  
Features  
The ISL9120IR is a highly integrated buck-boost switching  
regulator that accepts input voltages either above or below the  
regulated output voltage. This regulator automatically transitions  
between buck and boost modes without significant output  
disturbance. The ISL9120IR also has automatic bypass  
functionality for when the input voltage is generally within 1% to  
2% of the output voltage, there will be a direct bypass connection  
between the VIN and VOUT pins. In addition to the automatic  
bypass functionality, the ISL9120IR also has a forced bypass  
functionality with the use of the BYPS pin.  
• Accepts input voltages above or below regulated output  
voltage  
• Automatic bypass mode functionality  
• Automatic and seamless transitions between buck and boost  
modes  
• Input voltage range: 1.8V to 5.5V  
• Selectable forced bypass power saving mode  
• Adaptive multilevel current limit scheme to optimize efficiency  
at low and high currents  
This device is capable of delivering up to 800mA of output  
• Output current: up to 800mA (V = 2.5V, V  
IN  
= 3.3V)  
OUT  
current (V = 2.5V, V  
= 3.3V) and provides excellent  
IN OUT  
efficiency due to its adaptive current limit pulse frequency  
modulation (PFM) control architecture.  
• High efficiency: up to 98%  
• 41µA quiescent current maximizes light-load efficiency  
• Fully protected for over-temperature and undervoltage  
• Small 3mmx3mm 12 Ld TQFN package  
The ISL9120IR is designed for stand-alone applications and  
supports a 3.3V fixed output voltage or variable output voltages  
with an external resistor divider. The forced bypass power saving  
mode can be chosen if voltage regulation is not required. The  
device consumes less than 3.5µA of current over the operating  
temperature range in the forced bypass mode.  
Applications  
• Smartphones and tablets  
The ISL9120IR requires only a single inductor and very few  
external components. Power supply solution size is minimized by  
a 3mmx3mm 12 Ld TQFN package.  
• Portable consumer and wearable devices  
100  
VIN  
=
ISL9120IRNZ  
1.8V TO 5.5V  
V
= 3.6V  
IN  
95  
90  
85  
80  
75  
70  
VIN  
LX1  
C
1
L
1
10µF  
1µH  
LX2  
VOUT  
V
= 4V  
IN  
ENABLE  
DISABLE  
V
= 2.5V  
IN  
EN  
VOUT = 3.3V  
V
= 3.4V  
IN  
V
= 3V  
IN  
C
2
BYPASS  
BUCK-BOOST  
FB  
BYPS  
22µF or 47µF  
1
10  
100  
1000  
OUTPUT CURRENT (mA)  
FIGURE 1. TYPICAL FIXED OUTPUT APPLICATION  
FIGURE 2. EFFICIENCY: V  
OUT  
= 3.3V, T = +25°C  
A
February 2, 2016  
FN8743.1  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2015, 2016. All Rights Reserved  
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.  
All other trademarks mentioned are the property of their respective owners.  
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