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3글자 이상 입력하세요. Search for multiple part numbers fromhere.
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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What is the load transient response of an LDO?
Transient Response of an LDO
Load transient response refers to the sequence of behavior in which the output voltage of an LDO temporarily fluctuates and then returns to its nominal voltage when the load current changes suddenly.
For example, if the load current suddenly increases, the LDO output voltage undershoots before returning to the nominal voltage. On the other hand, if the load current suddenly decreases, the LDO output voltage overshoots before returning to the nominal voltage.
Mechanism of load transient response
An LDO maintains its output voltage using negative feedback. However, the internal feedback circuit has a limited response speed, which causes a time lag before it can react to changes in load current. This time lag results in transient voltage fluctuations when the load current changes rapidly.
Introduction of an LDO with fast load transient response
We have released the TCR5FM series with high-speed load transient response.
The main characteristics are as follows.
| Series | TCR5FM series | ||
|---|---|---|---|
| Package | Name | DFN4D | |
| Size typ. (mm) | 1.0×1.0×0.37 | ||
| Operating ranges | Input voltage VIN (V) | 1.55～5.5 | |
| Output current IOUT (mA) | 500 | ||
| Operation temperature Topr (°C) | -40～125 | ||
| Electrical characteristics （Unless otherwise specified, Tj=25°C、VIN= 3.3V、VOUT=2.8V） |
Output voltage VOUT (V) | 0.9～5.0 | |
| Output voltage accuracy VOUT (%) |
IOUT=1～500mA Tj=-40～125°C |
±2.2 | |
| Quiescent current IB(ON) typ. (μA) |
IOUT=0mA | 10 | |
| Stand-by current IB(OFF) typ. (μA) |
VCT=0V | 0.1 | |
| Drop-out voltage VDO typ. (mV) |
IOUT=500mA | 220 | |
| Load transient response ⊿VOUT typ. (mV) |
IOUT=1mA→500mA, tr=1μs | -60 | |
| IOUT=500mA→1mA, tf=1μs | 40 | ||
| IOUT=0mA→100mA, tr=1μs | -75 | ||
| IOUT=100mA→0mA, tf =1μs | 25 | ||
| Sample Check & Availability |  |
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Related Links
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