下图为LDO典型应用电路图 输入电压Vi施加到LDO芯片输入后,被降压成输出电压VO驱动负载(电灯泡),这里的输出电压VO(Output Voltage)是LDO的一个重要参数,一般工程师在进行选型时首先考虑的就是输出电压。 LDO有固定输出电压(Fixed)和可调输出电压(Adjustable)两种。固定输出电压LDO使用比较方便,经过厂家精密调整后的输出电...
1,最大输出电流Imax(Maximum Output Current)。LDO类似于一个恒压源,在输出电压不变的情况下,根据负载情况来调整电流大小。LDO必须能在最不利的工作条件下给负载提供足够的电流。要注意所选择LDO负载电流的瞬态特性,以用于那些更 5、高的瞬时峰值电流场合,需有足够余量。用电设备的功率不同,要求稳压器输出的最大...
Check Distributor Inventory - 22-Lead LQFN Package (3mm × 4mm × 0.95mm) 1 600m 5.5 3 - Adj 1.2µ 4.5m 45m Current Limit, Current Monitor, High PSRR, LDO, Output Current Limit, Output Current Monitor, Output Current Regulation, OV/UV Monitoring, Overcurrent Limiting, Overtemperature...
However, the pass element may be enabled by a current limiting circuit that bypasses the error amplifier to limit the current generated at the output of the pass element.Karan Singh JainTimothy Bryan MerkinSusan Curtis
Adjustable Output Voltage Option Standby Current: 3.5mA( TPY.) High Ripple Rejection: 60dB@1KHz ( MET1117A33) Line Regulation: 2mV( TYP.) Temperature Stability≤ 0.5% Current Limit( 850mA) Thermal Shutdown Protection( 160℃) Small Packages:SOT223、 TO252-2L ...
LDO的保护电路也是在设计中需要考虑的问题。本文设计了可编程电流限保护电路,可编程电流限可以将过流时LDO的负载电流限制在一定范围内,避免过长时间的大电流对电路中的功率管造成损坏[3]。传统结构的限流保护电路会存在一些弊端,当LDO工作在输入输出压差较大的情况下,若电流限值较大,将直接导致功率管因长期工作在大...
Adjustable Output Voltage Option Standby Current：3.3mA（TPY.）High Ripple Rejection：60dB@1KHz（ME1117A33）Line Regulation: 0.1％（TYP.）Temperature Stability≤0.5% Current Limit（1.3A）Thermal Shutdown Protection（160℃）矽源特ChipSourceTek-ME1117 Typical Application:Consumer and Industrial ...
logic compatible ON/OFF switched input. When disabled, power consumption drops to nearly zero. Other key features include reverse battery protection, current limit, and thermal shutdown. The SPX3819 includes a reference bypass pin for optimal low noise output performance. With its very low output ...
3.最大输出电流(Maximum Output Current) 通常,输出电流越大的稳压器成本越高,为了降低成本,在多个稳压器组成的供电系统中,应根据各部分所需的电流值选择适当的稳压器。LDO最大输出电流的说明在Electrical Characteristics中Current Limit部分,在AS1117中,电流的输出范围是1~1.4A。
1117LDO Output Capacitor Requirements. The 1117LDO is a low-dropout linear regulator that provides a stable output voltage with low noise and ripple. The output voltage is determined by the value of the feedback resistors, and the output current is limited by the internal current limit circuit....