Nisshinbo Micro Devices Inc. RP111S251D-E2-JE

The RP111x is a CMOS-based LDO regulator featuring 500 mA output current. The input voltage is as low as 1.4 V and the output voltage can be set from 0.7 V. Due to a built-in 0.46 Ω (at Vout = 2.8 V) on-resistor, RP111x can provide a low dropout voltage. RP111x also features an excellent line transient response, ripple rejection at 75 dB, and low noise. The output voltage accuracy is as high as ±0.8% and the temperature drift coefficient of output voltage is low at ±30 ppm/°C. The accuracy of the output voltage of RP111x includes the temperature characteristics and the load transient response has been improved. The typ. and max value of under/overshoot for various output current are shown in the typical characteristics, therefore the accuracy of the output voltage estimation will be easy on the actual operating cases. In addition to a fold-back protection circuit built into conventional regulators, RP111x contains a thermal shutdown circuit and an inrush current limit circuit. SOT-23-5, SOT-89-5, and HSOP-6J packages are available.

• Input Voltage Range (Maximum Rating): 1.4 V to 5.25 V (6.0 V)
• Operating Temperature: -40°C to 105°C
• Supply Current: Typ. 80 μA
• Standby Current: Typ. 0.1 μA
• Dropout Voltage: Typ. 0.23 V (IOUT = 500 mA、VSET = 2.5 V)
• Ripple Rejection: Typ. 75 dB (f = 1 kHz), Typ. 70 dB (f = 10 kHz)
• Output Voltage Accuracy: ±0.8% (VSET ≥ 1.8 V)
• Output Voltage Temperature Coefficient: Typ. ±30 ppm/°C (VSET ≥ 1.8 V)
• Feedback Voltage Accuracy: 0.7±18 mV
• Feedback Voltage Temperature Coefficient: Typ. ±100 ppm/°C
• Line Regulation: Typ. 0.02%/V
• Input Transient Response: Typ. ±1.5 mV (VIN: VSET + 0.5 V ⇔ VSET + 1.5 V (tr = tf = 5.0 μs), VIN ≥ 1.4 V, IOUT = 30 mA)
• Packages: SOT-23-5, SOT-89-5, HSOP-6J
• Output Voltage Range: 0.7 V, 1.1 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 2.8 V, 2.85 V, 2.9 V, 3.0 V, 3.3 V, 3.4 V. RP111x001B/D: 0.7 V to 3.6 V (Adjustable with external resistor)
• Built-in Fold-back Protection Circuit: Typ. 50 mA
• Thermal Shutdown Temperature: 165°C
• Inrush Current Limit: Typ. 400 mA (for 180 μs after start-up)
• Ceramic capacitors are recommended to be used with this IC: 1.0 μF or more (Internally Fixed Output Voltage)
• Output Noise: 20 x VSET μV rms (BW = 10 Hz to 100 kHz, VSET ≥ 1.8 V)

• Power source for accessories such as car audios, car navigation systems, and ETC systems
• Power source for ECUs such as EV inverter and battery charge control unit