Output voltage regulator circuit of charge pump

A technology for adjusting circuits and output voltages, which is used in output power conversion devices, electrical components, and conversion equipment without intermediate conversion to AC. problem, to achieve the effect of eliminating ripple, small size and small layout area

Active Publication Date: 2010-11-17
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the setting of the filter capacitor will occupy a large area, which is

Method used

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  • Output voltage regulator circuit of charge pump
  • Output voltage regulator circuit of charge pump
  • Output voltage regulator circuit of charge pump

Examples

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Embodiment Construction

[0014] see figure 2 The regulator circuit shown has roughly the same structure as the prior art. The current discharge principle: the output port of the charge pump 1 is connected to the first end of the load 3, and the second end of the load 3 is connected to the first end of the current source 4. end, the second end of the current source 4 is grounded; the gate of the transistor 2 is connected to the second end of the load 3, one of the source and the drain of the transistor 2 is connected to the output port of the charge pump 1, and the other is used as a regulating circuit output port. This embodiment is described by taking the load 3 as a resistance device.

[0015] The innovation of this embodiment is that the inventor changed the filter capacitor 5 connected between the output port of the charge pump 1 and the ground in the prior art to be connected between the second end of the load 3 and the ground, thereby ensuring Regulates the voltage at the output port of the c...

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PUM

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Abstract

The invention discloses an improved output voltage regulator circuit of a charge pump, comprising a load, a current source and a transistor, wherein the first end of the load is connected with an output port of the charge pump; the second end of the load is connected to the first end of the current source; the second end of the current source is earthed; the grid electrode of the transistor is connected to the second end of the load; the source electrode or the grid electrode of the transistor is connected to the output port of the charge pump, and the other one is used as an output port of the regulator circuit. The regulator circuit further comprises a filter capacitor connected between the second end of the load and the earth. The filter capacitor arranged in the mode can eliminate the ripple wave of the output port of the regulator circuit and has the advantages of small size and small layout area occupying an integrated circuit.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to an output voltage regulating circuit for a charge pump. Background technique [0002] Charge pump is a capacitive voltage converter, which is mainly used to boost the circuit voltage. Because of its simple circuit and high efficiency, it can be widely used in integrated circuits powered by a single power supply. For example, it can be used as an EEPROM (EEPROM) or flash memory (Flash Memory) provides a voltage signal higher than the power supply voltage for data write operations. [0003] Generally speaking, the output voltage of the charge pump will be higher than the required voltage value, so the output voltage adjustment circuit is often set to clamp the output voltage of the charge pump at the required value, and the output voltage adjustment circuit can also improve Stability of the charge pump output voltage. [0004] In the prior art, there are mainly two structu...

Claims

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Application Information

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IPC IPC(8): H02M3/07H02M1/14
Inventor 杨光军
Owner SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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