The TCR4DG series are CMOS general-purpose single-output

voltage regulators with an on/off control input, featuring low dropout

voltage, low output noise voltage and low inrush current.

These voltage regulators are available in fixed output voltages

between 1.0 V and 4.5 V and capable of driving up to 420 mA.

They feature over-current protection, over-temperature protection,

Inrush current protection circuit and Auto-discharge function.

The TCR4DG series are offered in the ultra small plastic mold

package WCSP4E (0.645 mm x 0.645 mm; t 0.43 mm (max)). It has

a low dropout voltage of 193 mV (3.3 V output, IOUT = 420 mA) with

low output noise voltage of 38 μVrms (2.5 V output) and a load

transient response of only ⊿VOUT = ±115 mV ( IOUT = 1 mA ? 420 mA, COUT =1.0 μF).

As small ceramic input and output capacitors can be used with the TCR4DG series, these devices are ideal for portable

applications that require high-density board assembly such as cellular phones.

Features

? Low Drop-Out voltage

VDO = 193 mV (typ.) at 3.3 V-output, IOUT = 420 mA

? Low output noise voltage

VNO = 38 μVrms (typ.) at 2.5 V-output, IOUT = 10 mA, 10 Hz ≤ f ≤ 100 kHz

? Fast load transient response (⊿VOUT = ±115 mV (typ.) at IOUT = 1 ? 420 mA, COUT =1.0 μF )

? High ripple rejection ( R.R = 70 dB (typ.) at 2.5 V-output, IOUT = 10 mA, f = 1 kHz )

? Over-current protection

? Over-temperature protection

? Inrush current protection circuit

? Auto-discharge function

? Pull down connection between CONTROL and GND

? Ceramic capacitors can be used ( CIN = 1.0μF, COUT =1.0 μF )

? Ultra small package WCSP4E (0.645 mm x 0.645 mm ; t 0.43 mm (max))