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REF3033AIDBZR

3.3V series voltage reference, 0.2% acc, 75ppm/°C, 42μA Iq, 1mV dropout, SOT-23-3

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Manufacturer Part：

REF3033AIDBZR

Package：

SOT-23-3 / DBZ (2.92 x 1.3 x 1.12mm)

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Description

Product Overview

The REF3033AIDBZR from Texas Instruments is a 3.3V precision series voltage reference in a tiny SOT-23-3 package. It offers 0.2% initial accuracy, 75ppm/°C max drift (-40°C to +125°C), 42μA typical quiescent current, 1mV dropout, 25mA output current, and 36μVpp noise (0.1-10Hz) for portable and loop-powered applications.

Key Specifications

Output Voltage 3.3V (fixed)
Initial Accuracy ±0.2%
Temperature Coefficient 50ppm/°C max (0°C to 70°C), 75ppm/°C max (-40°C to +125°C)
Input Voltage Range 3.35V to 5.5V
Dropout Voltage 1mV typ. (at zero load)
Output Current 25mA max.
Quiescent Current 42μA typ., 50μA max.
Noise (0.1-10Hz) 36μVpp typ.
Noise (10Hz-10kHz) 105μVrms typ.
Line Regulation 130μV/V typ.
Load Regulation 100μV/mA typ.
Output Short Circuit Continuous (protected)
Reference Type Series (bandgap)
No Load Capacitor Required Yes (stable without output cap)
Package SOT-23-3 (2.92 x 1.3mm)
Operating Temperature -40°C to +125°C

Features

  • Micro-size SOT-23-3 package
  • Ultra-low dropout: 1mV typical
  • High output current: 25mA
  • High initial accuracy: ±0.2%
  • Low quiescent current: 42μA typical
  • Excellent temperature drift: 50ppm/°C (0-70°C)
  • No load capacitor required for stability
  • Output short-circuit protected
  • 4kV HBM ESD protection
  • MSL-1 (unlimited floor life)

Applications

  • 4-20mA loop-powered industrial transmitters
  • ADC/DAC voltage reference for precision measurements
  • Portable and battery-powered instruments
  • Intrinsically safe and explosion-proof equipment
  • Power management and voltage monitoring

The REF3033AIDBZR from Texas Instruments is a 3.3V precision series voltage reference in a tiny SOT-23-3 package, offering 0.2% initial accuracy and 75ppm/°C maximum temperature drift over the -40°C to +125°C range. With only 42μA typical quiescent current and 1mV dropout voltage, it is ideal for loop-powered and battery-powered applications. The 25mA output current capability and no-external-capacitor stability simplify PCB design. The 36μVpp low-frequency noise makes it suitable for high-resolution ADC/DAC reference applications.

The REF3033 uses a CMOS bandgap voltage reference architecture. The bandgap circuit generates a stable 1.25V reference by combining the negative temperature coefficient of a forward-biased diode (VBE) with the positive temperature coefficient of two diodes operating at different current densities (ΔVBE). These are scaled and summed to produce a near-zero temperature coefficient at the nominal bandgap voltage. An internal amplifier then scales this voltage to the 3.3V output level. The CMOS design minimizes quiescent current to 42μA while maintaining good noise performance. The series topology passes the supply current through the output, allowing very low dropout operation—only 1mV above the output voltage at zero load.

Pin Name Type Function
1 OUT Output 3.3V reference output (up to 25mA)
2 GND Power Ground
3 IN Power Input supply (3.35V to 5.5V)
  • 4-20mA pressure transmitter ADC reference with 42μA Iq budget
  • 12-16 bit ADC/DAC precision voltage reference in portable instruments
  • Battery-powered data logger with 1.8V minimum supply compatibility
  • Intrinsically safe instrument reference without output capacitor
  • Power supply voltage monitoring threshold reference
Manufacturer Part Number Package Notes
TI REF3030AIDBZR SOT-23-3 3.0V version, same family
TI REF3433AIDBZR SOT-23-3 0.15% accuracy, 30ppm/°C, 3.9μA Iq
ADI ADR3433ARJZ SOT-23-3 0.1% accuracy, 8ppm/°C
Maxim MAX6143ASA33+ SOIC-8 0.05% accuracy, 3ppm/°C
Microchip MCP1501T-33E/SN SOT-23-6 0.1% accuracy, 40ppm/°C
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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