R1161x Series


Data Sheet / Flyer
Data Sheet * Flyer

We recommend succeeding product
"RP200N". ⇒Comparison List

The R1161x Series are CMOS-based voltage regulator ICs with high output voltage accuracy, low supply current, and low ON-resistance. 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.

These ICs perform with low dropout voltage and a chip enable function. To prevent the destruction by over current, current limit circuit is included. The R1161x Series have 3-mode. One is standby mode with CE or standby control pin. Standby mode realizes ultra small consumption current off mode. Other two modes are realized with ECO pin. Fast Transient Mode (FT mode) and Low Power Mode (LP mode) are alternative with ECO pin. Consumption current is reduced at Low Power Mode compared with Fast Transient Mode. Output voltage is maintained between FT mode and LP mode.

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.

Supply Current Typ. 3.5µA (Low Power Mode, Vout<1.6V),
Typ. 80µA (Fast Transient Mode, Vout<1.8V)
Typ. 60µA (Fast Transient Mode, Vout>=1.8V)
Standby Mode Typ. 0.1µA
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)
Ripple Rejection Typ. 65dB (f=1kHz, FT Mode)
Temperature-Drift Coefficient of Output Voltage Typ. ±100ppm/°C
Line Regulation Typ. 0.01%/V (at Fast Transient Mode)
Output Voltage Accuracy ±2.0% (±3.0% at LP Mode)
Packages SOT-23-5, SON-6, HSON-6
Output Voltage 0.8V to 3.3V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
Input Voltage Min. 1.40V (VOUT >= 1.0V)
Min. 1.45V (VOUT<1.0V)
Built-in fold-back protection circuit Typ. 50mA (Current at short mode)
External Capacitors CIN=COUT=Tantalum 1.0µF (VOUT<1.0V)
CIN=COUT=Ceramic 1.0µF (VOUT>=1.0V)
  • Precision Voltage References.
  • Power source for electrical appliances such as cameras, VCRs and hand-held communication equipment.
  • Power source for battery-powered equipment.
Data Sheet Flyer Package Info. Mark Info. Quality Assurance Data
R1161x Series R1161N Series SOT-23-5 R1161N Reliability

All PDF files are less than 1MB unless otherwise stated.

Note : Discontinued Products
SON-6 (R1161Dxx1 Series) are already discontinued. Providing only for the customer under present adoption with stock.
HSON-6 (R1161Dxx2 Series) are already discontinued.

  • Buy Products / Order Sample


Ricoh semiconductor products are available at those dealers.


Page Top