RT8010裕鼎祥咨询电话：139 2843 4054
【RT8010 】1.5MHz,1A 带软启功能的同步降压型变换器
【RT8010 】概述
RT8010 是一款采用固定频率，电流模，PWM架构的降压型变换器。该芯片集成了主开关管和同步管以提高效率。2.5V到5.5V的输入电压范围使得RT8010 适用于采用单节锂离子电池或3节NiMH/NiCd电池的便携系统。输出电压可低至0.6V。RT8010 可提供1A的输出电流，并可提供100%占空比的低压降运行，延长了电池在便携系统中的寿命。 开关频率在内部被设定为1.5MHz，因此可使用小型表面贴装电感器和电容器。内置同步管提高了效率且不需要外接肖特基二极管。RT8010 有可调版本和1.2V、1.8V和3.3V固定输出版本。
【RT8010 】特点:
RT8010 效率高达96%
1.5MHz固定开关频率
RT8010 高达1A的输出电流
RT8010 典型270μA静态电流
2.5V至5.5V的输入电压范围
RT8010 低至0.6V的可调输出电压
100%占空比低压降工作
RT8010 无需肖特基二极管
RT8010 短路和过温保护
RT8010 出色的稳压和负载瞬态响应
RT8010 关断电流＜1μA
RT8010 带软启功能
RT8010 过压保护
RT8010 可提供1.2V、1.8V、3.3V和可调输出电压
TDFN-6封装
RT8010 符合RoHS规范及Pb-Free
【RT8010 】应用
蜂窝电话
便携媒体播放器/MP3播放器
数码相机设备和摄影机
便携仪器
PC设备
| RT8010 General Description |
|
The RT8010/A is a high efficiency Pulse-Width-Modulated (PWM) step-down DC/DC converter. Capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the RT8010/A is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources such as cellular phones, PDAs and hand-held devices.Two operating modes are available including : PWM/Low-Dropout autoswitch and shutdown modes. The Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application.The RT8010/A enters Low Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. RT8010/A enter shut-down mode and consumes less than 0.1μA when EN pin is pulled low.The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 1.5MHz. This along with small WDFN-6L 2x2 and WQFN-16L 3x3 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection. |
|
RT8010 Ordering Info |
|
Note : |
|
RT8010 Features |
|
• +2.5V to +5.5V Input Range
• Output Voltage (Adjustable Output From 0.6V to VIN) ♦ RT8010 : 1.0V, 1.2V, 1.5V, 1.6V, 1.8V, 2.5V and 3.3V Fixed/Adjustable Output Voltage ♦ RT8010A Adjustable Output Voltage Only • 1A Output Current • 95% Efficiency • No Schottky Diode Required • 1.5MHz Fixed-Frequency PWM Operation • Small 6-Lead WDFN and 16-Lead WQFN Package • RoHS Compliant and 100% Lead (Pb)-Free |
|
RT8010 Application |
|
• Mobile Phones
• Personal Information Appliances • Wireless and DSL Modems • MP3 Players • Portable Instruments |
|
RT8010 Pin Configurations |
|
RT8010 Typical Applications Circuit |
|
Figure 1. Fixed Voltage Regulator
with R2 = 300kΩ to 60kΩ so the IR2 = 2μA to 10μA, and (R1 x C1) should be in the range between 3x10-6 and 6x10-6 for component selection. Figure 2. Adjustable Voltage Regulator |
