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About information presented in this cross reference

The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.

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재고 확인 및 구매

Operation of Linear Regulators

Series regulators

External parts are unnecessary as shown in the lower left figure. (Input/Output capacitors are necessary.)
The MOSFET operates as a variable resistor so that the output voltage becomes constant voltage.

The potential difference (VIN - VOUT) × input current (IIN) between the drain and source of the MOSFET is a loss. For example, if the input is 5 V and the output is 3 V, the efficiency is 60%. It is used as a power supply for circuits requiring low noise and output voltage accuracy.

Shunt regulators

The area surrounded by the dotted line shown in the lower right figure is the IC. It needs three external resistors. The built-in transistor operates as a variable resistor so that IK + IOUT = IIN = constant. As a result, the voltage generated at RSD becomes constant and the output voltage is made constant voltage. But in addition to the output current, a cathode current flowing through the transistor is required. Also, there is a voltage drop at the input-side resistor RSD, which reduces the efficiency. It is used for low-current (~ 20 mA) applications such as switching power supply reference voltage and switching power supply photocoupler driver.

Series regulators
Series regulators
Shunt regulators
Shunt regulators

Chapter IV : Local Power Supply ICs

Power Management IC
Example of Power Line Structure in a System
Why POL Supply ICs Are Wanted?
Types of Local Power Supply ICs
Operation of Switching Regulators
Functions of LDO
Load Switch IC
Functions of Load Switch IC

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