ams1117
AMS1117 is a positive low-dropout regulator with a voltage drop of 1.2V at 1A current.
AMS1117 has two versions: fixed output version and adjustable version, fixed output voltage is 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0V, with 1% accuracy; fixed output voltage is 1.2 The accuracy of V is 2%.
AMS1117 integrates internal overheating protection and current limiting circuit, which is the best choice for battery-powered and portable computers.
The AMS1117 series regulators are available in an adjustable version and a variety of fixed voltage versions. They are designed to provide 1A output current and the operating voltage difference can be as low as 1V. At the maximum output current, the minimum voltage difference of the AMS1117 device is guaranteed not to exceed 1.3V, and it will gradually decrease as the load current decreases.
Ams1117 buck circuit schematic
The AMS1117 chip is a positive low dropout voltage regulator with an internal integrated overheat protection and current limiting circuit. Its fixed output version voltage can be 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0V, and the design adopts 3.3V output is the ASM1117-3.3 chip. AMS1117 step-down circuit diagram is shown below:
Among them, C25 and C27 are input capacitors, which are used to prevent voltage inversion after power failure. C26 and C28 are output filter capacitors, which are used to suppress self-oscillation and stabilize the output voltage.
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