Nisshinbo NR1641 Low Drop-Out (LDO) Voltage Regulators

Nisshinbo Micro Devices NR1641 Low Drop-Out (LDO) Voltage Regulators feature high ripple rejection, ultra-low output noise, high-speed response characteristics, and low quiescent current. The CMOS-based regulators implement MODE pin input voltage to select between the automatic alternative mode and the fixed fast mode. The automatic alternative mode changes the internal mode between the low power and fast modes according to the load current. Furthermore, the Slope of Output Voltage at start-up can be selected from 200μs/V or 500μs/V. By this option, the inrush current limit can be changed depending on the capacitance connected to the output pin.

The low quiescent current, low noise, and high ripple rejection of the Nisshinbo NR1640 are ideal for IoT, battery-powered, and noise-sensitive analog applications.

Features

1.7V to 5.5V (6.5V) input voltage range (maximum)
Output voltage range of 1.0V to 5.0V
Output voltage accuracy of ±1.0% (V_SET ≥ 1.8V, T_a = +25°C)
1.0A output current
Quiescent current (V_MODE = “Low”) of typical 17µA
Quiescent current (V_MODE = “High”) of typical 1.5mA
Slope of output voltage at start-up of 200µs/V or 500µs/V
Output noise voltage (10Hz to 100kHz)
- Typical 3.7µVrms (I_OUT = 100mA)
- Typical 20µVrms (I_OUT = 1mA, V_MODE = “Low”)
Ripple rejection
- Typical 75dB (f = 1kHz, V_SET = 2.8V)
- Typical 80dB (f = 10kHz, V_SET = 2.8V)
- Typical 85dB (f = 100kHz, V_SET = 2.8V)

Dropout voltage
- Typical 0.10V (I_OUT = 500mA, V_SET = 2.8V, NR1641GY)
- Typical 0.20V (I_OUT = 1000mA, V_SET = 2.8V, NR1641GY)
Thermal shutdown function at typical +165°C
Start-up inrush current limit of typical 250mA
Foldback protection
Fast/low power automatic mode alternative function
- MODE pin “Low” automatic alternative mode
- MODE pin “High” fixed to fast mode
Ceramic capacitors are recommended – C_IN, C_OUT 10µF or greater (Built-in filter element eliminates the need for a capacitor for noise reduction)

Applications

CMOS image sensors
High-accuracy ADC and DAC
Communication devices such as RF modules, clock generation devices such as PLL or VCO

Nisshinbo NR1641 Low Drop-Out (LDO) Voltage Regulators

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