Suspension follow regulated power supply circuit device

Abstract

The invention provides a suspension follower stabilized power supply circuit, the circuit structure is simple, the area and power consumption of the LDO module chip are relatively small, and the circuit can be realized by conventional technology, which can greatly reduce the circuit cost and improve the stability of the circuit And reliability, which includes: reference circuit, operational amplifier, MOS tube, input power supply VDD, negative feedback module, the power supply terminal of the reference circuit, the power supply terminal of the operational amplifier, the substrate and the source terminal of the MOS tube are all connected to the input power supply VDD, The output terminal of the reference circuit controls the same-inverting input terminal of the operational amplifier, and the negative input terminal of the operational amplifier is connected to the output of the negative feedback module. The voltage between the ground terminal of the operational amplifier and the ground terminal of the reference circuit is determined by the drain terminal of the MOS transistor and the negative feedback module Output voltage control, the output terminal of the operational amplifier controls the input voltage of the negative feedback module and the gate terminal of the MOS tube.

Description

technical field [0001] The invention relates to the technical field of voltage-stabilized power supplies, in particular to a suspension-following voltage-stabilized power supply circuit device. Background technique [0002] The voltage supported by advanced integrated circuit technology is usually the so-called low-voltage technology, generally 5V, 3.3V, 1.8V, 1.2V, etc., but there is a situation in practical applications that VDD is high voltage, generally above 9V, and because the load size is different First, the phases are different, and the time-varying characteristics of the load cause VDD to follow the load to a certain extent, such as 12V, 18V, and 24V changes. If the output voltage cannot follow the input voltage or the load voltage changes beyond the specified voltage The working range will inevitably cause problems such as short circuit, load failure or load damage. Therefore, the load must have a stable voltage source. [0003] In the prior art, a regulated powe...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art such as poor voltage stabilization effect of the voltage stabilizing power supply circuit, no high-voltage process support on the chip or complex circuit structure meeting the high-voltage process requirements, large chip area and power consumption, and high circuit cost, the present invention provides a new Suspension follows the regulated power supply circuit device, its circuit structure is simple, the area and power consumption of the LDO module chip are relatively small, and the circuit can be realized by conventional technology, which can greatly reduce the circuit cost and effectively improve the stability and reliability of the circuit

Images