CMOS LDOs Go Mobile

Housed in small packages, Toshiba's TCR4DG series CMOS low-dropout (LDO) regulators includes general-purpose, single-output voltage regulators with on/off control input, low output noise voltage and low inrush current. The devices are available in fixed output voltages between 1.0V and 4.5V and are capable drive currents up to 420 mA.


Small ceramic input and output capacitors can be used with the TCR4DG series, making these devices suitable for mobile applications that require high-density board assembly, such as cell phones. The new regulators are offered in an ultra-small plastic mold WCSP4E package (0.645mmx0.645mm (typical); t:0.43mm (max)) and feature over-current protection, over-temperature protection, inrush current protection, and auto-discharge functionality. Features include:

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  • Low drop-out voltage: VDO=193mV (typ.) at 3.3V-output, IOUT=420mA
  • Low output noise voltage: VNO=38μVrms (typ.) at 2.5V-output, IOUT=10mA, 10Hz<=f<= 100kHz
  • Fast load transient response (VOUT =±115mV (typ.) at IOUT = 1420mA, COUT=1.0μF )
  • High ripple rejection (R.R=70dB (typ.) at 2.5V-output, IOUT=10mA, f=1kHz )
  • Over-current protection
  • Over-temperature protection
  • Inrush current protection circuit
  • Auto-discharge function
  • Pull down connection between CONTROL and GND 

Checkout a datasheet and visit the Toshiba website for more details.

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