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NCP1550SN33T1 DC/DC Step-Down Converting PMIC 3.3V SOT-153/TSOP-5/SOT23-5 marking DCD Step-Down Converter
| 控制方式 MODE | PWM/PFM |
| 输入电压VIN Input Voltage | 2.45~5.5V |
| 输出电压VOUT Output Voltage | 3.3V |
| 输出电流IOUT Output Current | |
| 震荡频率FOSC Oscillation Frequency | 600KHZ |
| 内置FET Built-in FET | |
| Description & Applications | 600 kHz PWM/PFM Step−Down DC−DC Controller • High Efficiency 92%, Typical • Low Quiescent Bias Current of 50 A (Typical at PFM Mode with No Load) • Output Voltage Options from 1.8 V to 3.3 V with High Accuracy 2.0% • Low Output Voltage Ripple, 50 mV, Typical • PWM Switching Frequency at 600 kHz • Automatic PWM/PFM Switchover at Light Load Condition • Very Low Dropout Operation, 100% Max. Duty Cycle • Chip Enable Pin with On−Chip 150 nA Pullup Current Source • Low Shutdown Current, 0.3 A, Typical • Input Voltage Range from 2.45 V to 5.5 V • Built−in Soft−Start • Internal Undervoltage Lockout (UVLO) Protection • Low Profile and Minimum External Components • Micro Miniature TSOP−5 Package • Pb−Free Packages are Available • Personal Digital Assistant (PDA) • Camcorders and Digital Still Camera • Hand−Held Instrument • Distributed Power System • Computer Peripheral |
| 描述与应用 | 600 kHz的PWM/ PFM降压型DC-DC控制器 •高效率92％，典型 •低静态电流偏置电流为50？ （典型值在PFM模式下无负载） •从1.8 V至3.3 V的输出电压选项 高精度2.0％ •低输出电压纹波，50 mV的典型 •PWM开关频率在600千赫 •PWM / PFM自动切换在轻负载条件 •非常低压差操作，最大100％。占空比 •芯片使能引脚片150 nA的上拉电流源 •低关断电流，0.3 A，典型？ •输入电压范围从2.45 V至5.5 V •内置软启动 •内部欠压锁定（UVLO）保护 •低调，最少的外部元件 •微小型TSOP-5封装 •无铅包可用 •个人数字助理（PDA） •摄像机和数码相机 •手持式仪器 •分布式电源系统 •电脑周边设备 |
