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线性稳压器之于整体电源系统,就像袖扣之于笔挺的西装,两者相辅相成,缺一不可。设计简单、小尺寸、低杂讯、低静态电流的线性稳压器是中低功率应用中不可或缺的元件,立锜提供上百种线性稳压器产品,输入电压覆盖 0.8V 至 80V,负载能力 0.02A 至 4A,可满足电池供电装置、车用、工业应用的不同需求。
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href="https://www.richtek.com/RedirectToProduct?specid=RT9059&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9059 </div> <div class="desc"> (1V-5.5V,3A) 0.6uA Iq </div></a> </div> <div class="cell industrial"> <a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2533W&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RTQ2533W </div> <div class="desc"> (1.1-6.5V, 3A) </div></a> </div> <div class="cell industrial"> <a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2537&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RTQ2537 </div> <div class="desc"> (1.1-6.5V, 4A) </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9194&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9194 </div> <div class="desc"> (13.5V, 1A) Controller </div></a> </div> <div class="cell automotive"> <a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2569-QA&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RTQ2569-QA </div> <div class="desc"> (36V, 0.2A) </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9094A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9094A </div> <div class="desc"> (5.5V, 2A) PG,SS </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2532W&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RTQ2532W </div> <div class="desc"> (1.1-6.5V, 2A) </div></a> </div> <div class="cell automotive"> <a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2516-QT&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RTQ2516-QT </div> <div class="desc"> (6V, 2A) </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9161/RT9161A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9161A </div> <div class="desc"> (14V, 0.5A) </div></a> </div> <div class="cell automotive"> <a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2569-QA&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RTQ2569-QA </div> <div class="desc"> (36V, 0.2A) </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9048A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9048A </div> <div class="desc"> (6V,1.5A)<br> Reverse Protection </div></a> </div> <div class="cell industrial"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT2518&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT2518 </div> <div class="desc"> (6V, 1.2A) </div></a> </div> <div class="cell industrial"> <a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2521A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RTQ2521A </div> <div class="desc"> (1.1-6.5V,1.5A) </div></a> </div> <div class="cell automotive"> <a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2511-QA&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RTQ2511-QA </div> <div class="desc"> (14V, 0.2A) </div></a> </div> <div class="cell automotive"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT2560Q&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT2560Q </div> <div class="desc"> (36V, 0.1A) </div></a> </div> <div class="cell general"> <a href="https://www-preprod.richtek.com/zh-cn/product-specifications/rt90/rt9085?utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=zh-cn" target="_blank"> <div class="part"> RT9085A </div> <div class="desc"> (0.8-5.5V, 1A) </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9095&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" style="font-size: 17px;text-align: center;color: #323237;" target="_blank"> <div class="part"> RT9095 </div> <div class="desc"> (5.5V,0.7A)<br> Power Good </div></a> </div> <div class="cell industrial"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT2519W&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT2519W </div> <div class="desc"> (6V, 1A) Low Noise </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9067&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9067 </div> <div class="desc"> (14V, 0.2A) 2uA Iq </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9069&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9069 </div> <div class="desc"> (36V, 0.2A) 2uA Iq </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9080&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9080 </div> <div class="desc"> (1.2-5.5V, 0.6A) 2uA Iq </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9078&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9078 </div> <div class="desc"> (5.5V, 0.3A) 2uA Iq </div></a> </div> <div class="cell automotive"> <a href="https://www-preprod.richtek.com/zh-cn/product-specifications/rtq2/rtq2510-qa-rtq2510a-qa?utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=zh-cn" target="_blank"> <div class="part"> RTQ2510-QA </div> <div class="desc"> (6V, 1A) </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9074&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9074 </div> <div class="desc"> (60V, 0.1A) </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9079&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9079 </div> <div class="desc"> (36V, 0.2A) </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9169/RT9169H&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9169 </div> <div class="desc"> (6V, 0.1A) 4uA Iq </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9193&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9193 </div> <div class="desc"> (5.5V, 0.3A)) </div></a> </div> <div class="cell automotive"> <a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2531A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RTQ2531A </div> <div class="desc"> (5.5V,0.5A) Low Noise </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9068&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9068 </div> <div class="desc"> (60V, 0.05A) </div></a> </div> <div class="cell general"> <a href="https://www.richtek.com/RedirectToProduct?specid=RT9072A/RT9072B&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue44EN&sc_lang=en" target="_blank"> <div class="part"> RT9072B </div> <div class="desc"> (80V,0.02A) Adj. Vout </div></a> </div> </div> </div> <div class="vin-label">Vin<font style="font-weight: normal;"> 80V</font></div> </div>
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选择 LDO 时,必须考虑以下关键指标:输入电压、输出电压电流、功率消耗、输入输出电压差在不同温度变化、电源纹波抑制比(PSRR)、静态电流(Iq)。

▸ 输出电压

立锜提供各种输出电压设定方式的产品,分压电阻可增加设定弹性,PCB 引脚连线简单方便,固定输出量大面广。

▸ 输出电流

满足应用同时也需考虑功率消耗(负载电流与输入输出电压差的乘积)。

▸ 封装 & 功率消耗

常见的 SOT-23-5 包装适用于 0.3W 功耗,而 PSOP-8 包装可适用 0.9W 功耗。*

* 测试条件为正常 PCB 布局下(即连接到晶片引脚的 PCB 铜箔比引脚和散热片略大)、PCB 环境温度为 60°C、晶片最高结温为 125°C 。

▸ 杂讯抑制能力 PSRR

PSRR 是用来量化 LDO 对不同频率的输入电源纹波的抑制能力的,它反映了 LDO 不受杂讯和电压波动影响、保持输出电压稳定的能力。在低频率 10kHz 以下 , LDO 具有很高的开环电压增益,能对纹波形成非常有效的抑制。当超过单位增益频率,LDO 便无法再消除波纹了,所以在高频率处的纹波衰减,主要是藉由 LDO 输出电容和它的内部寄生电容来完成。

▸ 低静态电流(<15uA)

静态电流是指由 IC 内部的回馈控制和驱动电路所消耗的电流,透过量测流过 LDO 接地引脚的电流得知。如果休眠时电源消耗成为电池寿命关键的应用,便可选择低静态电流的线性稳压器。

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