ISL9104 500mA 4.3MHz Low IQ High Efficiency Synchronous Buck Converter

VIN (min) (V)	2.7
VIN (max) (V)	6
VOUT (min) (V)	0.8
VOUT (max) (V)	VIN
IOUT (max) (A)	0.5
BOM Total Footprint	0.5" x 0.5"

The ISL9104, ISL9104A is a 500mA, 4.3MHz step-down regulator, which is ideal for powering low-voltage 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 4.3MHz pulse-width modulation (PWM) allows using small external components. Under light load condition, the device operates at low IQ skip mode with typical 20μA quiescent current for highest light load efficiency to maximize battery life, and it automatically switches to fixed frequency PWM mode under heavy load condition.

The ISL9104, ISL9104A includes a pair of low 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.

The ISL9104, ISL9104A offers internal digital soft-start, enable for power sequence, overcurrent protection and thermal shutdown functions. In addition, the ISL9104, ISL9104A offers a quick bleeding function that discharges the output capacitor when the IC is disabled.

The ISL9104, ISL9104A is offered in a 1.6x1.6mm μTDFN package. The complete converter occupies less than 0.5CM2.

ISL9104 特点

High Efficiency Integrated Synchronous Buck Regulator with up to 93% Efficiency
2.7V to 6.0V Supply Voltage
4.3MHz PWM Switching Frequency
500mA Guaranteed Output Current
3% Output Accuracy Over-Temperature and Line for Fixed Output Options
20μA Quiescent Supply Current in Skip Mode
Less than 1μA Logic Controlled Shutdown Current
100% Maximum Duty Cycle for Lowest Dropout
Ultrasonic Switching Frequency at Skip Mode to Prevent Audible Frequency Noise (For ISL9104A Only)
Discharge Output Capacitor when Disabled
Internal Digital Soft-Start
Peak Current Limiting, Short Circuit Protection
Over-Temperature Protection
Chip Enable
Small 6 Pin 1.6mmx1.6mm μTDFN Package
Pb-Free (RoHS Compliant)

ISL9104 应用

Single Li-ion Battery-Powered Equipment
Mobile Phones and MP3 Players
PDAs and Palmtops
WCDMA Handsets
Portable Instruments

ISL9104 芯片订购指南

芯片型号	产品状态	温度范围	封装尺寸图	潮湿敏感度等级MSL	美元价格US $
ISL9104IRUAEVAL1Z	量产		评估板	N/A
ISL9104IRUAZ-T	量产	工业级	6 Ld uTDFN T+R	1
ISL9104IRUBEVAL1Z	量产		评估板	N/A
ISL9104IRUBZ-T	量产	工业级	6 Ld uTDFN T+R	1
ISL9104IRUCZ-T	量产	工业级	6 Ld uTDFN T+R	1
ISL9104IRUDZ-T	量产	工业级	6 Ld uTDFN T+R	1
ISL9104IRUFEVAL1Z	量产		评估板	N/A
ISL9104IRUFZ-T	量产	工业级	6 Ld uTDFN T+R	1
ISL9104IRUJZ-T	量产	工业级	6 Ld uTDFN T+R	1
ISL9104IRUNEVAL1Z	量产		评估板	N/A
ISL9104IRUNZ-T	量产	工业级	6 Ld uTDFN T+R	1
ISL9104IRUWEVAL1Z	量产		评估板	N/A
ISL9104IRUWZ-T	量产	工业级	6 Ld uTDFN T+R	1