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ISL9120IIAZ-T7A

更新时间： 2024-11-11 00:58:15
品牌 Logo 应用领域
瑞萨 - RENESAS /
页数 文件大小 规格书
13页 685K
描述
Compact High Efficiency Low Power Buck-Boost Regulator

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ISL9120IIAZ-T7A 数据手册

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DATASHEET  
ISL9120  
FN8659  
Rev.2.00  
May 23, 2017  
Compact High Efficiency Low Power Buck-Boost Regulator  
The ISL9120 is a highly integrated buck-boost switching  
Features  
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 ISL9120 also has automatic bypass  
functionality. 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 ISL9120 also has forced  
bypass functionality with the use of the BYP 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  
This device is capable of delivering up to 800mA of output  
• Adaptive multilevel current limit scheme to optimize  
efficiency at low and high currents  
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.  
• Output current: up to 800mA (V = 2.5V, V  
IN  
= 3.3V)  
OUT  
• High efficiency: up to 98%  
The ISL9120 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 forced bypass mode.  
• 41µA quiescent current maximizes light-load efficiency  
• Fully protected for over-temperature and undervoltage  
• Small 1.41m x1.41mm WLCSP  
Applications  
• Smartphones and tablets  
The ISL9120 requires only a single inductor and very few  
external components. Power supply solution size is minimized  
by a 1.41mmx1.41mm WLCSP.  
• Portable consumer and wearable devices  
Related Literature  
• For a full list of related documents, visit our website  
- ISL9120 product page  
100  
VIN  
=
V
= 3.6V  
IN  
ISL9120IINZ  
1.8V TO 5.5V  
95  
90  
85  
80  
75  
70  
VIN  
LX1  
C1  
10F  
L1  
1H  
LX2  
V
= 3.4V  
V
= 4V  
IN  
IN  
V
= 3V  
IN  
VOUT  
ENABLE  
VOUT = 3.3V  
EN  
DISABLE  
V
= 2.5V  
IN  
C2  
22F TO 47F  
FB  
FORCED BYPASS  
BUCK-BOOST  
BYP  
GND PGND  
1
10  
100  
1000  
OUTPUT CURRENT (mA)  
FIGURE 1. TYPICAL FIXED OUTPUT APPLICATION  
FIGURE 2. EFFICIENCY: V  
OUT  
= 3.3V, T = +25°C  
A
FN8659 Rev.2.00  
May 23, 2017  
Page 1 of 13  
1234567...13

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