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ISL9111A

更新时间： 2024-09-20 11:16:23
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瑞萨 - RENESAS /
页数 文件大小 规格书
15页 1373K
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Low Input Voltage, High Efficiency Synchronous Boost Converter with 1A Switch

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DATASHEET  
ISL9111, ISL9111A  
Low Input Voltage, High Efficiency Synchronous Boost Converter with 1A Switch  
FN7602  
Rev.4.00  
Jun 4, 2012  
The ISL9111 and ISL9111A provide a power supply solution  
Features  
for single-cell, dual-cell, or three-cell alkaline, NiCd or NiMH  
• Up to 97% Efficiency at Typical Operating Conditions  
battery-powered applications. The device has a typical 0.8V  
start-up voltage and is capable of supplying up to 5.25V output  
voltage. Both devices are guaranteed to supply 100mA from a  
single-cell input and 240mA from a dual-cell input when  
output is 3.3V. High 1.2MHz switching frequency allows for the  
use of tiny, low-profile inductors and ceramic capacitors to  
minimize the size of the solution.  
• Minimum Start-up Voltage  
- 0.8V (ISL9111)  
- 0.6V (ISL9111A)  
• Minimum Operating Voltage  
- 0.7V (ISL9111)  
- 0.5V (ISL9111A)  
The ISL9111 and ISL9111A are internally compensated, fully  
integrated synchronous boost converters optimized for  
efficiency with minimal external components. At light load, the  
device enters skip mode and consumes only 20µA of  
quiescent current, resulting in higher efficiency at light loads  
and maximum battery life.  
• Low Quiescent Current: 20μA (Typical)  
• At VOUT = 3.3V  
- 100mA Output Current @ VIN = 0.9V  
- 240mA Output from @ VIN = 1.8V  
The ISL9111 and ISL9111A address both rechargeable and  
non-rechargeable battery applications. The ISL9111 has a  
UVLO feature, which will internally shut off at 0.7V protecting a  
rechargeable battery. The ISL9111A has this feature disabled  
to maximize the usable life of a non-rechargeable single cell  
battery. The parts are available in fixed 3.0V, 3.3V and 5.0V  
output voltage versions or an adjustable output voltage version  
(ADJ). The fixed output voltage version also provides a FAULT  
pin for fault condition monitoring. The ISL9111 and ISL9111A  
are available in a 6 Ld SOT-23 package.  
• Logic Control Shutdown (Iq < 1µA)  
• Output Voltage Up to 5.25V  
• Output Disconnect During Shutdown  
• Skip Mode Under Light Load Condition  
• Undervoltage Lockout (ISL9111 Only)  
• Fault Protection: OVP (ADJ Version Only), OTP, Short Circuit  
• 6 Ld SOT-23 Package  
Applications  
• Products Including Portable HDMI and USB-OTG  
• Personal Medical Products  
• Wireless Mouse/Keyboard  
• Bluetooth Headsets  
• MP3/MP4 Players/DSC  
• Single-cell, Dual-cell and Triple-cell Alkaline, NiCd, NiMH  
Powered Products  
100  
4.7µH  
V
= 3.6V  
IN  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
1
SW  
VOUT  
5
2
VOUT  
GND  
6
3
VIN  
VIN  
EN  
4.7µF  
4.7µF  
V
= 0.9V  
IN  
V
= 1.8V  
IN  
VFLT  
1k  
4
FAULT  
ISL9111: 3.0/3.3/5.0V, ISL9111A: 3.0/3.3/5.0V  
0.1  
1
10  
(mA)  
100  
1000  
I
OUT  
FIGURE 1. TYPICAL APPLICATION  
FIGURE 2. FIXED 5V EFFICIENCY  
FN7602 Rev.4.00  
Jun 4, 2012  
Page 1 of 15  
1234567...15

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