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SGM2209-5.0XN5G/TR 是圣邦微推出的一款固定输出线性稳压器,工作电压最高可达 24V,固定输出 5.0V,最大输出电流 500mA。器件在 500mA 时压差仅 420mV,静态电流(Iq) 1.2mA,低静态消耗适合需节能的系统;在 10kHz 处的电源纹波抑制比(PSRR) 达 60dB,输出噪声仅 16μVrms,适用于对噪声敏感的模拟和数字混合电路。封装为 SOT-23-5,体积小,便于空间受限的应用。
内置过流保护、短路保护和过热保护,能在异常工况下限制电流并保护芯片与负载;带有使能(EN)引脚,便于系统上电控制与电源管理。复杂系统中可通过 EN 控制多路电源的有序上电或节能模式切换。
工作结温范围 -40℃ ~ +125℃(Tj)。由于为线性稳压器,功耗为 (Vin−5V)×Iout,若 Vin=24V 且输出满载 500mA,则耗散约 9.5W,远超 SOT-23 的散热能力,需避免这种工况或改用降压方案。推荐在设计时计算功耗并确保 PCB 散热(加大铜箔、热过孔或选择并联/更大封装)。
SOT-23-5 封装适合紧凑设计。建议输入侧加 1–10μF 陶瓷去耦,输出侧优选 10μF 低ESR 陶瓷电容以保证稳定性与瞬态响应,电容靠近芯片引脚布置。EN 引脚需按逻辑电平接入并考虑上拉/下拉设计以避免上电毛刺。
适用于工业控制、通信设备、便携式仪器及传感器供电等对噪声与PSRR有要求的场景。若系统输入电压远高于 7V 且需 500mA 输出,建议使用开关降压再配合 LDO 以减小功耗与热量,提高效率与可靠性。
总结:SGM2209-5.0XN5G/TR 在低噪声、良好PSRR与多重保护方面表现突出,适合中低压差、对噪声敏感且需稳定 5V 输出的应用;设计时务必重视功耗计算与散热措施,合理选择外部滤波与布局。
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WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
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