ISL9103A

500mA 2.4MHz Low IQ High Efficiency Synchronous Buck Converter

Product Status: Mass Production

OVERVIEW

The ISL9103, ISL9103A is a 500mA, 2.4MHz 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 2.4MHz 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 ISL9103, ISL9103A 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 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.

The ISL9103, ISL9103A is offered in a 1.6x1.6mm UTDFN package. The complete converter occupies less than 0.5cm2 .

KEY FEATURES

  • High Efficiency Integrated Synchronous Buck Regulator with up to 95% Efficiency
  • 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
  • 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 ISL9103A 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 UTDFN Package
  • Pb-Free (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL9103A
Basic Information
生产状态
Mass Production
iSim模型
YES
输出数量
1
拓扑 [Rail 1]
Buck
输入电压最小值 (V) [Rail 1]
2.7
输入电压最大值 (V) [Rail 1]
6
输出电压最小值 (V) [Rail 1]
0.8
输出电压最大值 (V) [Rail 1]
6
输出电流最大值 (A) [Rail 1]
0.5
IQ [Rail 1]
32 µA
开关频率 (最大值) (MHz)
2.4
开关频率 (最小值) (MHz)
2.4
最大占空比 (%)
100
资质级别
Standard
峰值效率 (%)
95
POR
No
BOM总占用面积 (mm2)
187.1
SYNCH功能
No
控制类型
Current Mode
开关频率范围 (MHz)
2.4
CAN 采样
YES
温度范围
-40 to +85

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