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NCP511SN33T1G

150mA LDO, 3.3V, 30uVrms noise, 75dB PSRR, SOT-23-5, onsemi NCP511

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Manufacturer Part：

NCP511SN33T1G

Package：

SOT-23-5 (2.9 x 1.6 x 1.15mm)

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Description

Product Overview

The onsemi NCP511SN33T1G is a 150mA low-noise LDO providing a fixed 3.3V output in SOT-23-5 package. With 30uVrms output noise, 75dB PSRR at 1kHz, and 250mV dropout at 150mA, it delivers ultra-clean power for noise-sensitive RF and precision analog applications.

Key Specifications

Output Voltage 3.3V (fixed)
Output Current 150mA
Input Voltage 2.5V to 6.0V
Dropout Voltage 250mV @ 150mA
Output Noise 30uVrms (10Hz-100kHz)
PSRR 75dB @ 1kHz
Quiescent Current 40uA (typical)
Accuracy ±1%
Package SOT-23-5
Operating Temperature -40°C to +125°C

Features

  • 30uVrms ultra-low output noise
  • 75dB PSRR at 1kHz
  • ±1% output accuracy
  • Noise bypass pin
  • 40uA low quiescent current
  • Stable with 1uF ceramic output

Applications

  • RF module clean power
  • ADC/DAC reference supply
  • Precision analog front-end
  • GPS receiver supply
  • Audio codec power

The onsemi NCP511SN33T1G is a 150mA ultra-low-noise LDO providing a fixed 3.3V output with 30uVrms output noise and 75dB PSRR in SOT-23-5 package. It is designed for the most noise-sensitive RF and precision analog applications where supply cleanliness directly impacts system performance, such as GPS receivers, ADC/DAC references, and RF modules.

The NCP511SN33T1G uses a CMOS LDO architecture with a noise bypass (BP) pin connected to the internal bandgap reference. An external capacitor on the BP pin (typically 22nF) filters reference noise, achieving 30uVrms output noise and 75dB PSRR. The ±1% accuracy is maintained over temperature and load. The 40uA quiescent current provides a good balance between noise performance and battery life for portable applications.

Pin Name Type Function
1 VIN Input Input supply (2.5-6.0V)
2 GND Ground Ground
3 EN Input Enable (active high)
4 BP I/O Noise bypass capacitor
5 VOUT Output 3.3V regulated output
  • GPS receiver LNA clean 3.3V supply
  • 24-bit ADC voltage reference supply
  • RF transceiver VDD noise filtering
  • Audio codec analog 3.3V rail
  • Precision sensor signal conditioning supply
Manufacturer Part Number Package Notes
TI TPS73633DBVR SOT-23-5 400mA, 30uVrms
Richtek RT9193-33GB SOT-23-5 300mA, ultra-low noise
ADI LT1761ES5-3.3#TRMPBF SOT-23-5 20uVrms, lowest noise
onsemi NCP512SN33T1G SOT-23-5 250mA version
TI TLV70033DDCR SOT-23-5 300mA, 48uVrms
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Service & Packaging

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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