Circuit for speeding up stabilizing low voltage difference linear stabilizer output voltage
A technology of low dropout linearity and output voltage, which is applied in the direction of instruments, adjusting electrical variables, and conversion equipment without intermediate conversion to AC. It can solve problems such as lack of LDO and poor response characteristics of LDO, and achieve the effect of improving transient response.
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[0021] Such as image 3 As shown, the circuit of the LDO output voltage of the present invention is based on the existing circuit composed of the output tube 103, the error amplifier 102, the reference voltage source 101, the resistor divider network and the load 105. The difference is: the resistor divider network 204 Three feedback voltages are provided, namely Vfb, a voltage Vfb+ΔV slightly higher than Vfb, and a voltage Vfb-ΔV slightly lower than Vfb.
[0022] The first charge discharge control circuit 206 is for quickly discharging the gate capacitance of the output transistor 203, and is composed of a first comparator comp1, a first MOS switch MN1 and a current source. The input terminals of the first comparator comp1 are respectively connected to the reference voltage Vref generated by the reference and a voltage Vfb+ΔV slightly higher than the feedback voltage.
[0023] The second charge discharge control circuit 207 is for quickly discharging the load 205 capacitance...
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