NR1641 series 1A Equipped with Low Power Mode Ultra-Low Noise Low Dropout Voltage Regulator
2023-06-16
●GENERAL DESCRIPTION
■The NR1641 series are CMOS based low dropout voltage regulator that achieves both ultra-low output noise, high ripple rejection, high-speed response characteristics, and low quiescent current.
■The MODE pin input voltage can be used to select between the automatic alternative mode and the fixed fast mode. The automatic alternative mode changes the internal mode between low power mode and the fast mode according to the load current.
■In addition, Slope of Output Voltage at Start-up can be selected from 200 μs/V or 500 μs/V.
■By this option, depending on the capacitance connected to the output pin, the inrush current limit can be changed.
■Since the NR1640 has low quiescent current, low noise, and high ripple rejection, it is suitable for IoT devices, battery-powered devices, and the noise sensitive analog application.
●FEATURES
■Input Voltage Range (Maximum Rating):
▲1.7 V to 5.5 V (6.5 V)
■Output Voltage Range: 1.0 V to 5.0 V
■Output Voltage Accuracy:
▲± 1.0% (VSET ≥ 1.8 V, T a = 25 °C)
■Output Current: 1.0 A
■Quiescent Current (VMODE = "Low"): Typ. 17 μA
■Quiescent Current (VMODE = "High"): Typ. 1.5 mA
■Output Noise Voltage (10 Hz to 100 kHz):
▲Typ. 3.7 μVrms (I OUT = 100 mA)
▲Typ. 20 μVrms (IOUT = 1 mA, VMODE = "Low")
■Ripple Rejection: Typ. 75 dB (f = 1 kHz, V SET = 2.8 V)
▲Typ. 80 dB (f = 10 kHz, VSET = 2.8 V)
▲Typ. 85 dB (f = 100 kHz, VSET = 2.8 V)
■Dropout Voltage:
▲Typ. 0.10 V (IOUT = 500 mA, VSET = 2.8 V, NR1641GY)
▲Typ. 0.20 V (IOUT = 1000 mA, V SET = 2.8 V, NR1641GY)
■Thermal Shutdown Function: Typ. 165 °C
■Slope of Output Voltage at Start-up:
▲200 μs/V or 500 μs/V
■Start-up Inrush Current Limit: Typ. 250 mA
■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 10 μF or greater
(Built-in filter element eliminates the need for a capacitor for noise reduction)
■The NR1641 series are CMOS based low dropout voltage regulator that achieves both ultra-low output noise, high ripple rejection, high-speed response characteristics, and low quiescent current.
■The MODE pin input voltage can be used to select between the automatic alternative mode and the fixed fast mode. The automatic alternative mode changes the internal mode between low power mode and the fast mode according to the load current.
■In addition, Slope of Output Voltage at Start-up can be selected from 200 μs/V or 500 μs/V.
■By this option, depending on the capacitance connected to the output pin, the inrush current limit can be changed.
■Since the NR1640 has low quiescent current, low noise, and high ripple rejection, it is suitable for IoT devices, battery-powered devices, and the noise sensitive analog application.
●FEATURES
■Input Voltage Range (Maximum Rating):
▲1.7 V to 5.5 V (6.5 V)
■Output Voltage Range: 1.0 V to 5.0 V
■Output Voltage Accuracy:
▲± 1.0% (VSET ≥ 1.8 V, T a = 25 °C)
■Output Current: 1.0 A
■Quiescent Current (VMODE = "Low"): Typ. 17 μA
■Quiescent Current (VMODE = "High"): Typ. 1.5 mA
■Output Noise Voltage (10 Hz to 100 kHz):
▲Typ. 3.7 μVrms (I OUT = 100 mA)
▲Typ. 20 μVrms (IOUT = 1 mA, VMODE = "Low")
■Ripple Rejection: Typ. 75 dB (f = 1 kHz, V SET = 2.8 V)
▲Typ. 80 dB (f = 10 kHz, VSET = 2.8 V)
▲Typ. 85 dB (f = 100 kHz, VSET = 2.8 V)
■Dropout Voltage:
▲Typ. 0.10 V (IOUT = 500 mA, VSET = 2.8 V, NR1641GY)
▲Typ. 0.20 V (IOUT = 1000 mA, V SET = 2.8 V, NR1641GY)
■Thermal Shutdown Function: Typ. 165 °C
■Slope of Output Voltage at Start-up:
▲200 μs/V or 500 μs/V
■Start-up Inrush Current Limit: Typ. 250 mA
■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 10 μF or greater
(Built-in filter element eliminates the need for a capacitor for noise reduction)
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