R5321D SERIES

CMOS 2ch-LDOs for RF Unit

NO. EA-062-0606

1

OUTLINE

The R5321D Series are CMOS-based 2 channels voltage regulator ICs with high output voltage accuracy,

extremely low supply current, low noise, low ON-resistance and high ripple rejection. The R5321D Series

contain two voltage regulators. Each of these voltage regulators in the R5321D Series consists of a voltage

reference unit, an error amplifier, resistors for setting output voltage, a current limit circuit and a chip enable

circuit.

The chip enable function contributes to prolong battery life. Further, regulators in the R5321D Series are with

low dropout voltage, excellent load transient response and line transient response, thus the R5321D Series are

very suitable for the power supply for hand-held communication equipment.

The output voltage of each regulator is fixed with high accuracy by laser trim.

Since the package for these ICs is SON-8 package, high density mounting of the ICs on boards is possible.

FEATURES

• Low Supply Current .......................................................... Typ. 70µA (VR1, VR2)

• Low Standby Current ........................................................ Typ. 0.1µA (VR1, VR2)

• Input Voltage ..................................................................... Max.6.0V

• High Ripple Rejection ....................................................... Typ. 70dB (f=1kHz)

• High Output Voltage Accuracy ..........................................±2.0%

• Excellent Load Transient Response and Line Transient Response

• Small Package ................................................................ SON-8

APPLICATIONS

• Power source for cellular phones such as GSM, CDMA and Personal Handy-phone System.

• Power source for electrical appliances such as cameras, VCRs, camcorders, etc.

• Power source for battery-powered equipment.