Regulator. TCR4DG28 Datasheet
TOSHIBA CMOS Linear Integrated Circuit Silicon Monolithic
420 mA CMOS Low Drop-Out Regulator with inrush current protection circuit
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
Weight: 0.34 mg ( typ.)
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.
• 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))
Start of commercial production
Absolute Maximum Ratings (Ta = 25°C)
Operation temperature range
Storage temperature range
-0.3 to 6.0
-40 to 85
-55 to 150
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even
if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum
ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
Rating at mounting on a board
Board material: Glass epoxy(FR4)
Board dimension: 40 mm x 40 mm (both sides of board), t = 1.6 mm
Metal pattern ratio: a surface approximately 50%, the reverse side approximately 50%
Through hole: diameter 0.5 mm x 24
Pin Assignment (Top view)
A VIN VOUT
List of Products Number, Output voltage and Marking
Note: Please ask your local retailer about the devices with other output voltages.
Top Marking (top view)
Example: TCR4DG10 (1.0 V output)
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