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RT9193-33GB

300mA LDO, 3.3V, 220mV dropout, ultra-low noise, BP pin, SOT-23-5, Richtek RT9193

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Manufacturer Part：

RT9193-33GB

Package：

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

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Description

Product Overview

The Richtek RT9193-33GB is a 300mA ultra-low-noise CMOS LDO regulator providing a fixed 3.3V output in SOT-23-5 package. Featuring 220mV dropout at 300mA, 90uA quiescent current, and a noise bypass pin for further noise reduction, it is optimized for portable RF and wireless applications demanding clean power supply.

Key Specifications

Output Voltage 3.3V (fixed)
Output Current 300mA
Input Voltage 2.5V to 5.5V
Dropout Voltage 220mV @ 300mA
Quiescent Current 90uA (typical)
Shutdown Current <0.01uA
Output Noise Ultra-low (with BP cap)
PSRR High (with BP cap)
Accuracy ±2%
Package SOT-23-5
Operating Temperature -40°C to +85°C
Status Last Time Buy

Features

  • Ultra-low noise for RF applications
  • Noise bypass pin for further noise reduction
  • 220mV low dropout at 300mA
  • 90uA quiescent current
  • <0.01uA shutdown current
  • 50us fast startup
  • Stable with 1uF ceramic output

Applications

  • RF module power supply
  • Wireless handset clean power
  • Audio codec supply
  • ADC/DAC reference supply
  • Portable communications

The Richtek RT9193-33GB is a 300mA ultra-low-noise CMOS LDO providing a fixed 3.3V output with 220mV dropout. The noise bypass (BP) pin allows an external capacitor to filter the internal reference voltage, achieving ultra-low output noise ideal for RF modules, audio codecs, and precision analog circuits. Note: This product is in Last Time Buy status.

The RT9193-33GB uses a P-channel MOSFET pass element in a CMOS LDO configuration. The internal bandgap reference provides the ±2% output accuracy. The BP (bypass) pin is connected to the reference voltage node, allowing an external capacitor (typically 22nF) to filter reference noise. This dramatically reduces output noise and improves PSRR, especially at higher frequencies. The 90uA quiescent current is achieved through careful bias circuit design while maintaining noise and PSRR performance.

Pin Name Type Function
1 VIN Input Input supply (2.5-5.5V)
2 GND Ground Ground
3 EN Input Enable (active high)
4 BP I/O Noise bypass capacitor
5 VOUT Output 3.3V regulated output
  • Wi-Fi/BLE module 3.3V clean power supply
  • Audio codec low-noise analog supply
  • RF transceiver VDD noise filtering
  • Precision ADC voltage reference supply
  • Portable communications clean power rail
Manufacturer Part Number Package Notes
onsemi NCP511SN33T1G SOT-23-5 30uVrms, 75dB PSRR
TI TPS73633DBVR SOT-23-5 Low noise 400mA
ADI LT1761ES5-3.3#TRMPBF SOT-23-5 Ultra-low 20uVrms noise
Richtek RT9080-33GJ5 TSOT-23-5 600mA replacement
Richtek RT9193-33PB SC-70-5 Same function, smaller pkg
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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Contact Information

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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