The LTP3454 series are low voltage 400 mA voltage regulators. The input voltage is as low as V and the output voltage can set down to 0.5 V. The output voltage accuracy has been improved to ±1% and due to a built-in transistor with low on resistance. Each of these devices consists of a voltage reference unit, an error amplifier, a resistor-net for voltage setting, and a current limit circuits for over-current which is for the destruction prevention by the over-current. The LTP3454 devices use a type of outstanding CMOS process to minimize the supply current. A low on resistance P-MOS pass device is equipped for lower dropout voltage. LTP3454 also possess the CE function to save more energy and extend the battery life. The CE pin can switch the regulator to standby mode. The LTP3454 series are available in the SOT23-5 , DFN1×1-4 and SOT-89 packages.

Advantages And Characteristics

  • Wide Input Voltage Range: 1.2V to 5.5V  Very Low IQ: 48μA
  • Maximum Output Current: 400mA  Output Voltage Range: 0.5V to 3.8V
  • Output Voltage Accuracy: ±1% (VOUT ≥ 1.0V, TA = 25°C)
  • Dropout Voltage: Typical 0.22V (VOUT =1.5V)
  • Excellent Load/Line Transient Response, Line Regulation: 0.1%/V Typically\\
  • Built-in Fold Back Protection Circuit
  • Built-in Constant Slope Circuit
  • Built-in Auto-Discharging Circuit
  • Packages: SOT23-5L, DFN1×1-4L and SOT-89


  • Constant-voltage power supply for battery-powered devices
  • Constant-voltage power supply for TVs, notebook PCs and home appliances
  • Constant-voltage power supply for portable equipments
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