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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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About electrical characteristics (Understanding datasheet values)

As an example, an "Electrical Characteristics" table for the TCR2EF and TCR2EE Series is shown below.

Definitions of the Terms in the Table

  1. Output voltage (VOUT):
    This is the most important and key characteristic of a power supply IC. VOUT defines the accuracy of output voltage regulation under the specified test conditions.
    As shown in the table, it differs depending on the output voltage range.
    ICs with an output voltage of 1.8 V or higher are regulated with an accuracy of ±1.0%, while those with an output voltage of less than 1.8 V are regulated with an accuracy of ±18 mV.
  2. Input voltage(VIN):
    Range of input voltage that can be applied to a power supply IC. The minimum input voltage, if specified, indicates the input voltage that is required at the minimum to deliver the specified typical output current (IOUT), unless otherwise noted.
  3. Line regulation (Reg・line):
    Output voltage changes over the specified input voltage range, with the output current and the junction temperature kept constant (Tj=25°C).
    This rating does not include any output voltage change caused by input voltage transients.
  4. Load regulation (Reg・load):
    Output voltage changes over the specified output current range, with the input voltage and the junction temperature kept constant (Tj=25°C).
    This rating does not include any output voltage change caused by output current transients.
  5. Bias current (IB):
    Current consumed by the power supply IC when it is operating
  6. Standby current (IB(OFF)) :
    Current consumed by the power supply IC when it is idle
  7. Input-output voltage differential (VIN-VOUT)
    Differential between the minimum input operating voltage and the output voltage required for the IC to keep the output voltage in regulation.
    Also called dropout voltage.
  8. Average temperature coefficient of output voltage (TCVO):
    Change in the output voltage per degree centigrade under the specified test conditions. TCVO of 100 ppm/°C (typ.) means that a 1°C increase in temperature causes the output voltage to increase by 0.1 mV. It should be noted, however, that all devices do not exhibit the same TCVO value; it should be considered only as a guide.
  9. Output noise voltag (VNO):
    RMS value of the noise voltage that occurs at the output when the IC is operating
  10. Ripple rejection (R.R.) :
    The ratio of the ripple amplitude (i.e., a small alternating-current component) in the IC input voltage to that in the output voltage after being rejected by the circuit
    R.R. (dB) = 20 log (ΔVIN/ΔVOUT)
  11. Load transient response (ΔVOUT) :
    Change in the regulated output voltage that occurs as a result of a change in load current when the input voltage is stable enough for output voltage regulation
  12. Control voltage (ON) (VCT (ON) ):
    Voltage required to turn on the IC
  13. Control voltage (VCT (OFF) ) :
    Voltage required to turn off the IC
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