The HX3002 is high efficiency synchronous, PWM step-up DC/DC converters optimized to provide a high efficient solution to medium power systems. The devices work under the input voltage between 0.9V and 4.4V with a 1.4MHz fixed frequency switching. These features minimize overall solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. Automatic PWM/PFM mode switching at light load saves power and improves efficiency. The HX3002 is capable of supplying an output voltage between 2.5V and 4.3V, the internal synchronous switch is desired to provide high efficiency without Schottky. The devices also featured providing up to 260mA from a single AA cell input or up to 450mA from a 2-cell AA with a 3V/3.3V output. The HX3002 regulators are available in the industry standard SOT-23-6 power packages (or upon request)
Up to 94% Efficiency Low voltage start-up 0.9V Shut-down current: < 1µA Input voltage 0.9V 4.4V Output voltage 2.5V 4.3V (Up to 5V with Schottky) Low switch on resistance RDS(ON), Internal switch: 0.33Ω 1.4MHz fixed frequency switching Automatic PWM/PFM mode switching High switch on current: 700mA Current-mode control and internal compensation Low profile SOT-23-6 package (lead-free packaging is now available)
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特点: ●低电压工作:可保证以0.9V (louT=1Ma)启动 ●点空比:内置PWM/PFM 切换控制电路(15-78%) ●振荡频率:300KHZ ●输出电压范围:1.5-6.5之间 ●输出电压精度: ±2% ●软启动功能:2mS ●带开/关控制功能 ●外接部件:线圈 二极管 电容器 晶体管 ●封装形式:SOT23-5 描述: KX2109F是一种由基准电压源、振荡电路、误差放大器、相位补偿电路、PWM/PFM 切换控制电路等构成的CMOS升压DC/DC 控制器。通过使用外接低通态电阻N 沟道功率MOS即可适用于需要高效率、高输出电流的应用电路上。通过PWM/PFM 切换控制电路,在负载较轻时,将工作状态切换为占空系数为15%的PFM 控制电路,可以防止因IC的工作电流引起的效率降低 用途: ●移动电话(PDC.GSM.CDMA.IMT200等) ●蓝牙设备 ●PDA ●便携式通讯设备 ●游戏机 ●数码相机 ●无绳电话 ●笔记本