Fast transient response circuit applied to LDO
A transient response, circuit technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve problems affecting circuit stability, LDO circuit output voltage fluctuations, affecting the normal operation of chips, etc., to achieve bandwidth and slew The effect of increased rate and increased response speed
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[0025] The present invention will be further described below in conjunction with the drawings and embodiments.
[0026] In order to solve the extra influence of the external capacitor on the LDO circuit, the present invention adopts an LDO circuit without external large capacitors. By improving the internal circuit of the LDO, the fast transient response capability of the LDO can be enhanced without reducing other performance of the circuit.
[0027] The fast transient response circuit applied to LDO includes P-channel enhanced MOS transistors MP1-MP9, N-channel enhanced MOS transistors MN1-MN3, voltage divider resistors R1 and R2, external fixed bias circuit module and load sampling The circuit module also includes Vcc port, VREF port, Vb port and Vout port. The Vcc port is connected to the power input terminal, the VREF is connected to the reference voltage terminal, the Vb port is connected to an external bias, and the Vout port is an output port of the overall circuit.
[0028] ...
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