Off-chip capacitor-less LDO circuit based on through silicon via array

Abstract

The invention discloses an off-chip capacitor-less LDO circuit based on a through silicon via array. The off-chip capacitor-less LDO circuit comprises a band-gap reference circuit, an error amplifier, a driver, an output power transistor, a sampling resistor network and a through silicon via capacitor. A positive input terminal of the error amplifier is connected with an output terminal of the sampling resistor network. A negative input terminal of the error amplifier is connected with an output terminal of the band-gap reference circuit. An output terminal of the error amplifier is connected with an input terminal of the driver. An output terminal of the driver drives the output power transistor. An output terminal of the output power transistor is respectively connected with one terminal of the sampling resistor network and one terminal of the through silicon via capacitor. The other terminal of the sampling resistor network and the other terminal of the through silicon via capacitor are connected and grounded. The band-gap reference circuit, the error amplifier, the driver and the output power transistor are respectively connected with an external input power supply. An additional capacitance multiplier circuit or off-chip capacitor is not required for the LDO circuit, noise of the external input power supply can be effectively rejected, and the off-chip capacitor-less LDO circuit has the advantages that the off-chip capacitor-less LDO circuit is good in technology compatibility, small in area, large in capacity and high in power supply rejection ratio.

Description

technical field [0001] The invention relates to the technical field of three-dimensional integrated circuits (3D ICs), in particular to an LDO circuit without off-chip capacitance based on a through-silicon via array. Background technique [0002] With the rapid development of portable electronic products, the demand for power management chips has increased dramatically. The main purpose of power management is to improve the efficiency of power devices, thereby extending battery life and equipment usage time. As the most common product in power management chips, Low Dropout Regulator (LDO) has the advantages of simple circuit, low noise and low power consumption, and is widely used in various electronic devices. [0003] According to whether there is an off-chip capacitor, the LDO circuit can be divided into an LDO circuit with an off-chip capacitor and an LDO circuit without an off-chip capacitor. In order for the LDO system loop to work normally, the LDO circuit with off...

AI Technical Summary

Problems solved by technology

However, in order to achieve the multiplication of on-chip capacitance, the LDO circuit needs to add several high-power amplifiers and bias modules, which will lead to excessive static power consumption

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