标题: 请问有没有稳压管或LDO输入5V-12V， 输出5V的 [打印本页] 作者: happy2058 时间: 2025-6-25 19:18 标题: 请问有没有稳压管或LDO输入5V-12V， 输出5V的 谢谢大家作者: xianfajushi 时间: 2025-6-25 22:31
TL431范围很宽且有一定动态范围作者: 名字不是重点 时间: 2025-6-25 23:13
进12V出5V太有了。。进5V出5V的貌似没有。。。作者: Xuchuanqiu 时间: 2025-6-26 04:50
有。可调节就行作者: hailuoren 时间: 2025-6-26 09:33
这个范围了直接DCDC呗作者: huangkk222 时间: 2025-6-26 14:18
可以加稳压管12V稳5V Y要看电流是多大作者: rundstedt 时间: 2025-6-27 16:16
只能选LDO了，但LDO也是有压降的。作者: SHYKH 时间: 2025-6-27 17:50
Yes, there are several voltage regulators and LDOs that can take an input range of 5V to 12V and output a stable 5V. The choice depends on your current requirements and how much efficiency or heat tolerance you need.
✅ Common Options:
🔹 1. Linear Regulators (e.g., 7805, AMS1117-5.0)
7805: Classic linear regulator, input up to 35V.
Easy to use, but inefficient—dissipates extra voltage as heat.
Good for low-power applications.
AMS1117-5.0: LDO with dropout ~1.1V.
Needs at least ~6.1V input to maintain stable 5V output.
Not suitable if your input drops to near 5V.
🔧 Note: Linear regulators get hot when stepping down from 12V to 5V at high current—add a heatsink if needed.
🔹 2. Switching Regulators (Buck Converters)
Much more efficient, especially if your input varies from 12V down to 5V.
Examples:
LM2596 (DC-DC buck module, very common)
MP1584, XL4015, TPS5430
Accept wide input (up to 30V depending on model), and maintain stable 5V output with high efficiency (80–90%).
✅ Great for powering microcontrollers, LED strips, sensors, etc.
🔹 3. LDO with Wide Input Support
If you need a proper LDO with better efficiency than a 7805:
LT1763, MIC29302, or LD1117 can be good choices depending on your current and dropout needs.
🔍 Recommendation:
If your input drops close to 5V, use a buck-boost converter or LDO with ultra-low dropout.
For most general use (like Arduino or Raspberry Pi), a buck converter is the most practical and efficient.
Let me know your specific current needs and whether efficiency or simplicity is more important—I’d be happy to recommend the best part number for your project!作者: weijoyer 时间: 2025-6-27 18:17
1117啊作者: coody_sz 时间: 2025-6-28 17:57
使用BUCK-BOOST电路，输入2~12V，可以得到5V。作者: rayin 时间: 2025-6-30 07:20
即便是LDO也是有0.几v的压降. 5.0V进,5.0v出, LDO是做不到的.作者: 3637320230 时间: 2025-6-30 11:36
LM1117-5V