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ISL9110AIITAZ-EVAL1Z

更新时间： 2024-09-20 01:06:07
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瑞萨 - RENESAS /
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16页 1187K
描述
1.2A High Efficiency Buck-Boost Regulator

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ISL9110AIITAZ-EVAL1Z 数据手册

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DATASHEET  
ISL9110A  
1.2A High Efficiency Buck-Boost Regulator  
FN8299  
Rev 1.00  
June 8, 2012  
The ISL9110A 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 part is capable of delivering up to 1.2A output current,  
and provides excellent efficiency due to its fully synchronous  
4-switch architecture. No-load quiescent current of only 35µA  
also optimizes efficiency under light-load conditions. Forced  
PWM and/or synchronization to an external clock may also be  
selected for noise sensitive applications.  
• Input Voltage Range: 1.8V to 5.5V  
• Output Current: Up to 1.2A  
• High Efficiency: Up to 95%  
• 35µA Quiescent Current Maximizes Light-load Efficiency  
• 2.5MHz Switching Frequency Minimizes External  
Component Size  
The ISL9110A is designed for standalone applications and  
supports 3.3V and 5V 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.  
• Selectable Forced-PWM Mode and External Synchronization  
• Fully Protected for Overcurrent, Over-temperature and  
Undervoltage  
The ISL9110A requires only a single inductor and very few  
external components. Power supply solution size is minimized  
by a 2.4mm x 1.6mm WLCSP package and a 2.5MHz  
switching frequency, which further reduces the size of external  
components.  
• Small 2.4mmx1.6mm WLCSP Package  
Applications  
• Regulated 3.3V from a Single Li-Ion Battery  
• Smart Phones and Tablet Computers  
• Handheld Devices  
• Point-of-Load Regulators  
Related Literature  
• See AN1750 “ISL9110A Evaluation Board User Guide”  
100  
95  
ISL9110AIITNZ  
VIN = 1.8V TO 5.5V  
A2  
B2  
A1  
LX1  
B1 PVIN  
C1  
L1  
2.2µH  
10µF  
90  
A4  
C1  
V
= 5V  
V
IN  
VIN  
LX2 B4  
D3  
85  
80  
75  
70  
MODE  
A5  
VOUT B5  
C2  
VOUT = 3.3V/1A  
EN  
D2  
V
= 3V  
IN  
BAT  
= 2.5V  
STATUS  
IN  
C2  
D1  
D5  
FB  
OUTPUTS  
PG  
10µF  
GND  
PGND  
V
= 3.3V  
OUT  
0.01  
0.05  
0.25  
1.25  
I
(A)  
OUT  
FIGURE 1. TYPICAL APPLICATION  
FIGURE 2. EFFICIENCY  
FN8299 Rev 1.00  
June 8, 2012  
Page 1 of 16  
1234567...16

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