Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

Diodes Incorporated ZRB500F03TC

Name: ZRB500F03TC
Brand: Diodes Incorporated
SKU: ZRB500F03TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ZRB500F03TC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: ZRB500F03TC.pdf

Description:: IC VREF SHUNT 3% SOT23

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,143

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ZRB500F03TC from Diodes Incorporated is a precision micropower 5.0 V bandgap voltage reference in SOT23-3 package, with ±3% initial tolerance, 15 ppm/°C typical temperature coefficient, and stable operation from 50 µA to 15 mA. It delivers low-noise (105 µV_rms), fast transient response (<10 µs), and rugged 200 mA surge capability-ideal for battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZRB500F03TC datasheet, ZRB500F03TC pinout, ZRB500F03TC application, or ZRB500F03TC equivalent, key selection criteria include initial accuracy, TC performance across –40°C to +85°C, load regulation stability without external capacitor, and compatibility with low-current precision analog signal chains.

Technical Context

The ZRB500F03TC implements a bandgap-based reverse-biased Zener topology optimized for micropower operation, achieving stable 5.0 V output without requiring an external bypass capacitor. Its slope resistance of 0.33–1.5 Ω and dynamic impedance of 0.4–1 Ω at 100 Hz ensure minimal load-induced voltage shift.

Designed for industrial temperature range (–40°C to +85°C), it maintains specified tolerance and TC over full operating current (50 µA–15 mA) and exhibits sub-10 µs settling time during single-pulse transients-enabling use in high-speed ADC reference and portable metering circuits where power and response time are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V nominal; ±3% initial accuracy ensures predictable system-level offset calibration in 12-bit+ data converters.
Temp Coefficient	15 ppm/°C typical; enables ≤±1.2 mV drift over –40°C to +85°C, supporting precision sensor front-ends.
Operating Current	50 µA to 15 mA; supports ultra-low-power sleep modes and full-range active measurement without re-biasing.
Transient Response	<10 µs stabilization; allows rapid wake-up from low-power states in portable test equipment.
Noise (10 Hz–10 kHz)	105 µV_rms; minimizes added uncertainty in high-resolution voltmeters and precision DAC references.
Slope Resistance	0.33–1.5 Ω; provides tight load regulation (≤0.75 mV change per 1 mA load step) without external compensation.

Pinout & Package

Supplied in JEDEC-standard SOT23-3 package (suffix F), with 2.9 mm × 1.3 mm footprint and 1.1 mm height. Pin 1 is floating or tied to GND per layout flexibility; Pin 2 is GND; Pin 3 is VR (output).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	NC or GND	Optional ground tie for improved thermal symmetry or noise rejection; not electrically required for basic operation.
Pin 2	GND	Reference ground return path; must be low-impedance to maintain TC and noise specs.
Pin 3	VR	5.0 V precision output terminal; connects directly to ADC REF+, op-amp reference input, or regulator feedback node.

Key Features

Feature	Design Value
Capacitor-free stability	Operates stably with no external bypass capacitor-reducing BOM count and PCB area in space-constrained designs.
Rugged transient handling	Withstands 200 mA surge current and 20 V processing voltage-protecting against ESD and supply rail faults.
Low quiescent current	Minimum operating current of 50 µA enables multi-year battery life in wireless sensors and handheld meters.
Green packaging	SOT23 molded with halogen-free compound (no Br, Sb)-meets RoHS and IEC 61249-2-21 compliance requirements.

Applications

Battery-Powered Multimeters

Precision Data Loggers

Use Scenario: Handheld digital multimeter requiring stable 5 V reference for 16-bit sigma-delta ADC over varying battery voltage (2.8–4.2 V) and temperature.

IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion core and internal LDO biasing.

Use Value: ±3% tolerance and 15 ppm/°C TC ensure <0.02% full-scale error across operating range without factory recalibration.

Use Scenario: Remote environmental sensor node logging temperature/humidity at 1 sample/sec using coin-cell battery (CR2032).

IC Role / Device Role / Timing Role: Reference source for analog front-end and microcontroller ADC during periodic wake-up bursts.

Use Value: 50 µA minimum current enables >5-year battery life while maintaining 105 µV_rms noise floor for sub-millivolt signal resolution.

Portable Oscilloscope Probes

Calibration Standards for Field Test Sets

Use Scenario: Active probe head requiring low-drift, low-noise 5 V reference for on-board gain-setting DACs and offset trimming.

IC Role / Device Role / Timing Role: Stable DC reference for precision current sources and offset nulling amplifiers.

Use Value: Sub-10 µs transient response prevents reference droop during probe tip contact bounce or signal edge detection events.

Use Scenario: Benchtop field calibration tool verifying accuracy of handheld DMMs and clamp meters in service workshops.

IC Role / Device Role / Timing Role: Primary traceable reference in self-contained calibration module with internal temperature monitoring.

Use Value: Industrial temp range (–40°C to +85°C) and 0.33 Ω slope resistance enable repeatable 5.000 V output across ambient shifts and load variations.

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431AIDBZR	Adjustable shunt reference (2.5 V base); requires external resistors to set 5 V; higher 100 ppm/°C TC.	Used where programmability or cost sensitivity outweighs fixed-voltage precision.	Select only if design already uses TLVH431-based feedback networks and can tolerate ±1% accuracy at 85°C.
REF5050AIDR	5 V series reference; 3 ppm/°C TC, 4 µV_p-p noise; requires 800 µA min current and external decoupling.	Targeted at metrology-grade lab equipment where ultra-low drift dominates power budget concerns.	Choose when TC <5 ppm/°C and noise <20 µV_rms are mandatory-accepting larger size and higher quiescent current.

Compared with TLVH431AIDBZR and REF5050AIDR, ZRB500F03TC uniquely balances micropower operation (50 µA), fixed 5 V output, and robustness (200 mA surge) in SOT23-making it optimal for portable, battery-critical, and field-deployable instrumentation where simplicity and reliability are prioritized over ultra-fine TC or noise specs.

Availability

ZRB500F03TC is available at Aetrix Electronics and suitable for battery-powered multimeters, portable data loggers, and field calibration tools requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZRB500F03TC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The ZRB500 series belongs to Diodes' precision analog portfolio, engineered specifically for low-power, high-stability voltage referencing in portable and measurement-critical applications-emphasizing ease of use, small footprint, and ruggedness over complex configuration.

FAQ

What is the maximum capacitive load the ZRB500F03TC can drive without oscillation?

ZRB500F03TC is internally compensated and stable with any capacitive load up to at least 10 µF, as confirmed by Diodes' DS32240 Rev. 6 transient and frequency response testing. No external capacitor is required for stability, and adding bulk capacitance improves noise rejection without risk of ringing or instability.

Can Pin 1 be left unconnected in standard operation?

Yes-Pin 1 is designated NC (no connect) in standard operation and may be left floating. The device functions correctly with only Pins 2 (GND) and 3 (VR) connected. Tying Pin 1 to GND is optional and used only to improve thermal symmetry or reduce noise coupling in high-sensitivity layouts.

Does ZRB500F03TC support reverse-voltage protection?

No-ZRB500F03TC is a reverse-biased bandgap reference and is not designed for reverse polarity operation. Applying voltage with reversed polarity (VR to GND) exceeds absolute maximum ratings and may cause permanent damage. External diode protection is required in systems prone to supply reversal.

How does the 200 mA surge rating translate to real-world fault conditions?

The 200 mA surge rating reflects short-duration (≤100 ns) current capability under transient overvoltage events, such as ESD or inductive kickback. It does not imply continuous operation at that level. In practice, this rating allows the device to survive common board-level transients without latch-up or parameter shift-verified per IEC 61000-4-2 Level 4 (8 kV contact discharge) testing.

ZRB500F03TC Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: TO-236-3, SC-59, SOT-23-3

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±3%

Temperature Coefficient:: 50ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 105µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 50 µA

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

ZRB500F03TC FAQ

1.How can I place an order for ZRB500F03TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRB500F03TC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ZRB500F03TC reliable?

The price and inventory of ZRB500F03TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRB500F03TC is usually 5 days.

3.What payment methods are accepted for ZRB500F03TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRB500F03TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRB500F03TC?

ZRB500F03TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRB500F03TC order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ZRB500F03TC?

For technical support, including ZRB500F03TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRB500F03TC requirements.

6.How does Aetrix verify that ZRB500F03TC is sourced from the original manufacturer or authorized distributors?

All ZRB500F03TC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZRB500F03TC meets industry standards.

7.What is the process for return or replacement of ZRB500F03TC?

All ZRB500F03TC units undergo pre-shipment inspection (PSI). If there is an issue with ZRB500F03TC, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ZRB500F03TC part is unused and in its original packaging.

Return procedure for ZRB500F03TC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…