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1. Description

The TCR8BM series are CMOS single-output voltage regulators with an on/off control input, featuring ultra low dropout voltage, high PSRR, low inrush current and fast load transient response.

A differentiating feature is the use of a secondary bias rail as a reference voltage that allows ultra low dropout of 170 mV (Typ.) at IOUT = 800 mA (1.1 V output, VBIAS = 3.3 V).

These voltage regulators are available in fixed output voltages between 0.8 V and 3.6 V, and capable of driving up to 800 mA. Other features include overcurrent protection, thermal shutdown, and Auto-discharge.

The TCR8BM series are offered in the ultra small plastic mold package DFN5B (1.2 mm x 1.2 mm; t 0.38 mm).

As small ceramic input and output capacitors can be used with the TCR8BM series, these devices are ideal for portable applications that require high-density board assembly such as cellular phones.

2. Application

Power IC developed for portable applications

3. Features

? Low dropout voltage

VDO = 170 mV (Typ.) at 1.1 V output, VBIAS = 3.3 V, IOUT = 800 mA

? Low stand-by current (IBIAS(OFF) = 1 μA (Max))

? Low quiescent bias current (IBIAS(ON) = 20 μA (Typ.) at VBIAS = 5.5 V, IOUT = 0 mA)

? Wide range output voltage line up (VOUT = 0.8 to 3.6 V)

? Overcurrent protection

? Thermal shutdown

? Inrush current reduction

? Under voltage lockout (TCR8BMxxA products)

? Auto-discharge

? Pull down connection between CONTROL and GND

? Ultra small package DFN5B (1.2 mm x 1.2 mm ; t 0.38 mm)