Freescale Semiconductor,inc.

Mithlesh Shrivas

Kumar Abhishek

Mayank Jain

Ashish Goel

Ankit Gupta

Chandan Gupta

Shankar Ramakrishnan

Rahul Sood

An LDO regulator system has first and second current mirror circuits connected to its output terminal. A load attached to the output terminal is supplied with a constant voltage. Variations in the load that cause variations in the magnitude of the output voltage trigger one of the first or second current mirror circuits to generate a current that varies the magnitude of a gate voltage of a pass-transistor. The variation in the gate voltage in turns varies the drain current of the pass-transistor, which varies the output voltage to counter the change in the magnitude of the output voltage. Using the first and second current mirror circuits avoids the need for a large load capacitor and very high bandwidth of a conventional LDO regulator.

LDO linear regulator with improved transient response

A standby control circuit for an integrated circuit module includes a first control circuit that is responsive, in a normal operating mode of the integrated circuit module, to an asynchronous standby signal indicating a standby mode entry event to output a standby mode signal synchronous with a primary clock signal to indicate a standby operating mode of the integrated circuit module. The standby control circuit also includes a second control circuit which is responsive, in a reduced power mode of the integrated circuit module, to the asynchronous standby signal indicating the standby mode entry event to control the first control circuit to output the standby mode signal synchronous with a secondary clock signal to indicate the standby operating mode.

Standby control circuit and method

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Noida, India

Mithlesh Shrivas