An adaptive low-power adjustable power supply circuit
By using an adaptive low-power adjustable power supply circuit, combined with DC-DC and LDO modules, and utilizing analog switches and DIP switches to adjust the voltage, the high power consumption problem caused by excessive voltage difference between DC-DC and LDO chips is solved, thereby improving stability and lifespan, as well as enabling flexible voltage adjustment.
CN224289625UActive Publication Date: 2026-05-26SHENZHEN MICROTEST AUTOMATION CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN MICROTEST AUTOMATION CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-05-26
Smart Images
Figure CN224289625U_ABST
Abstract
This utility model discloses an adaptive low-power adjustable power supply circuit, including connector J1, a first DC-DC power module, a second DC-DC power module, and an adjustable LDO power module. Connector J1 is connected to a 12V input voltage and is connected to the input terminals of both the first and second DC-DC power modules. The output terminal of the second DC-DC power module is connected to the input terminal of the adjustable LDO power module. The adjustable LDO power module includes an LDO power chip U3, analog switches U4 and U5, a DIP switch U6, resistors R4, R5, R7, R8, R10, and R11, a transistor Q1, and voltage divider resistors R6 and R9. This utility model adaptively adjusts and maintains a low voltage difference between the input and output pins of U3, thereby maintaining low power consumption. It also offers the advantages of low output ripple and high output power, achieving multiple advantages simultaneously. Analog switches U4 and U5 have low requirements for power supply ripple, so they directly generate 3.3V power through DC-DC conversion.
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