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ISL9103A

更新时间： 2024-09-19 14:58:27
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14页 745K
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500mA 2.4MHz Low IQ High Efficiency Synchronous Buck Converter

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DATASHEET  
ISL9103, ISL9103A  
500mA 2.4MHz Low IQ High Efficiency Synchronous Buck Converter  
FN6828  
Rev 3.00  
December 9, 2015  
The ISL9103, ISL9103A is a 500mA, 2.4MHz step-down  
regulator, which is ideal for powering low-voltage  
Features  
• High Efficiency Integrated Synchronous Buck Regulator  
with up to 95% Efficiency  
microprocessors in compact devices such as PDAs and  
cellular phones. It is optimized for generating low output  
voltages down to 0.8V. The supply voltage range is from  
2.7V to 6V allowing the use of a single Li+ cell, three NiMH  
cells or a regulated 5V input. It has guaranteed minimum  
output current of 500mA. A high switching frequency of  
2.4MHz pulse-width modulation (PWM) allows using small  
external components. Under light load condition, the device  
• 2.7V to 6.0V Supply Voltage  
• 2.4MHz PWM Switching Frequency  
• 500mA Guaranteed Output Current  
• 3% Output Accuracy Over-Temperature and Line for Fixed  
Output Options  
operates at low I skip mode with typical 20µA quiescent  
Q
• 20µA Quiescent Supply Current in Skip Mode  
• Less than 1µA Logic Controlled Shutdown Current  
• 100% Maximum Duty Cycle for Lowest Dropout  
current for highest light load efficiency to maximize battery  
life, and it automatically switches to fixed frequency PWM  
mode under heavy load condition.  
The ISL9103, ISL9103A includes a pair of low  
• Ultrasonic Switching Frequency at Skip Mode to Prevent  
Audible Frequency Noise (For ISL9103A Only)  
ON-resistance P-Channel and N-Channel internal MOSFETs  
to maximize system efficiency and minimize the external  
component count. 100% duty-cycle operation allows less  
than 300mV dropout voltage at 500mA.  
• Discharge Output Capacitor when Disabled  
• Internal Digital Soft-Start  
• Peak Current Limiting, Short Circuit Protection  
• Over-Temperature Protection  
The ISL9103, ISL9103A offers internal digital soft-start,  
enable for power sequence, overcurrent protection and  
thermal shutdown functions. In addition, the ISL9103,  
ISL9103A offers a quick bleeding function that discharges  
the output capacitor when the IC is disabled.  
• Chip Enable  
• Small 6 Pin 1.6mmx1.6mm UTDFN Package  
• Pb-Free (RoHS Compliant)  
The ISL9103, ISL9103A is offered in a 1.6x1.6mm UTDFN  
package. The complete converter occupies less than  
2
Applications  
0.5cm .  
• Single Li-ion Battery-Powered Equipment  
• Mobile Phones and MP3 Players  
• PDAs and Palmtops  
Pinout  
ISL9103, ISL9103A  
(6 LD 1.6x1.6 UTDFN)  
TOP VIEW  
• WCDMA Handsets  
VIN  
EN  
NC  
1
2
3
6
5
4
SW  
GND  
FB  
• Portable Instruments  
FN6828 Rev 3.00  
December 9, 2015  
Page 1 of 14  
1234567...14

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