
300mA Low Voltage LDO REGULATOR
R1131x SERIES
NO. EA-116-0503
1
OUTLINE
The R1131x Series are CMOS-based low voltage regulator ICs with output voltage range from 0.8V to 3.3V.
The minimum operating voltage is 1.4V. Each of these voltage regulator ICs consists of a voltage reference unit,
an error amplifier, resistors for setting output voltage, a current limit circuit, and a chip enable circuit.
To prevent the destruction by over current, current limit circuit is included. Standby mode realizes ultra small
consumption current.
The output voltage of these ICs is internally fixed with high accuracy. Since the packages for these ICs are
SOT-23-5, SON-6, and HSON-6, high density mounting of the ICs on boards is possible.
FEATURES
Ultra-Low Supply Current .................................Typ. 80A (VOUT<1.8V),
Typ. 60
A (VOUT >
= 1.8V)
Standby Mode ...................................................Typ. 0.1A
Low Dropout Voltage.........................................Typ. 0.48V(IOUT=300mA Output Voltage=1.0V Type)
Typ. 0.31V(IOUT
=300mA Output Voltage=1.5V Type)
Typ. 0.23V(IOUT
=300mA Output Voltage=3.0V Type)
High Ripple Rejection .......................................Typ. 65dB(f=1kHz)
Low Temperature-Drift Coefficient of Output Voltage Typ. ±100ppm/°C
Excellent Line Regulation .................................Typ. 0.01%/V
High Output Voltage Accuracy ..........................±2.0%
Small Package ................................................SOT-23-5(Super Mini-mold), SON-6, HSON-6
Output Voltage ..................................................Stepwise setting with a step of 0.1V in the range of
0.8V to 3.3V is possible
Input Voltage .....................................................Min. 1.40V
Built-in fold-back protection circuit....................Typ. 50mA (Current at short mode)
External Capacitors...........................................CIN = COUT = Tantalum 1.0F (VOUT<1.0V)
CIN
= COUT =Ceramic 1.0F (VOUT >
= 1.0V)
APPLICATIONS
Precision Voltage References.
Power source for electrical appliances such as cameras, VCRs and hand-held communication equipment.
Power source for battery-powered equipment.