Toshiba announces CMOS LDO voltage regulators

A family of CMOS low dropout (LDO) regulators – the TCR4DG series – has been announced by Toshiba.

Consisting of general-purpose, single-output voltage regulators with on/off control input, low output noise voltage and low inrush current, the TCR4DG series is available in fixed output voltages between 1.0 and 4.5V, and can drive up to 420mA.

According to the company, 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 regulators are offered in a plastic mould WCSP4E package measuring 0.645 x 0.645mm (t:0.43mm max) and feature over-current protection, over-temperature protection, inrush current protection, and auto-discharge functionality.

Additional features:
  • 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 = 1⇔420mA, COUT=1.0μF )
  • High ripple rejection (R.R=70dB (typ) at 2.5V output, IOUT=10mA, f=1kHz )
  • Pull down connection between CONTROL and GND