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

Diodes Incorporated ZRC500F03TC

Name: ZRC500F03TC
Brand: Diodes Incorporated
SKU: ZRC500F03TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRC500F03TC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZRC500F03TC.pdf

Description:: IC VREF SHUNT 3% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,941

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Product details

Overview

ZRC500F03TC from Diodes Incorporated is a precision 5.0 V bandgap voltage reference IC with ±1% initial tolerance, 30 ppm/°C typical temperature coefficient, and 19 µA typical knee current. It operates stably from 25 µA to 5 mA without external capacitors and delivers fast transient response (<10 µs), making it ideal for low-power portable instrumentation and battery-powered metering systems.

For engineers reviewing the ZRC500F03TC datasheet, ZRC500F03TC pinout, ZRC500F03TC application, or ZRC500F03TC equivalent, key selection criteria include low-knee-current operation, capacitor-free stability, industrial temperature range (–40°C to +85°C), SOT23-3 package compatibility, and slope resistance of 0.4 Ω typical.

Technical Context

The ZRC500F03TC implements a bandgap-based reverse-breakdown topology optimized for micropower operation, achieving stable 5.0 V output across –40°C to +85°C with no external stabilization capacitor required. Its low 19 µA knee current enables reliable startup under ultra-low bias conditions.

It exhibits 0.4 Ω typical slope resistance and 105 µV_rms wideband noise (10 Hz–10 kHz), supporting high-accuracy analog signal chains in test equipment and precision ADC/DAC references where load regulation and noise performance are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V ±1% at 150 µA - ensures accurate system-level voltage scaling in portable measurement devices
Tempco	30 ppm/°C typical - maintains ≤±1.5 mV drift over full industrial temperature range
Knee Current	19 µA typical - enables stable regulation even in energy-harvesting or ultra-low-power sleep modes
Slope Resistance	0.4 Ω typical - provides tight load regulation (≤0.2 mV change per 0.5 mA load shift)
Transient Response	<10 µs settling time - supports rapid power-up and dynamic reference switching in automated test systems
Noise (10 Hz–10 kHz)	105 µV_rms - minimizes added uncertainty in 16-bit+ data acquisition front-ends
Operating Current Range	25 µA to 5 mA - compatible with both microamp-level sensor biasing and higher-drive analog subsystems

Pinout & Package

Supplied in SOT23-3 package (JEDEC TO-236AB), with 1.3 mm × 2.9 mm footprint and 1.1 mm height. Pin 1 is floating or tied to GND per design 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 noise immunity or left floating for minimal footprint use
Pin 2	GND	Reference return path; must be low-impedance connection to system ground plane
Pin 3	VR	Stable 5.0 V output; drives ADC reference inputs, DAC bias networks, or comparator thresholds

Key Features

Feature	Design Value
No external capacitor required	Enables single-component reference solution in space-constrained PCB layouts (e.g., handheld multimeters)
Low 19 µA knee current	Allows reliable turn-on from weak bias sources such as high-impedance voltage dividers or leakage-limited circuits
0.4 Ω slope resistance	Delivers <±0.5 mV output variation across 0–4 mA load current swing in precision sensor signal conditioning
Stable with capacitive loads	Supports direct connection to ADC input capacitors (e.g., SAR ADC sample hold) without oscillation risk
Green molding compound	Meets RoHS and JEDEC J-STD-020 reflow compliance for lead-free assembly in industrial manufacturing

Applications

Battery-Powered Portable Meters

Precision Test Equipment

Use Scenario: Handheld digital multimeters and clamp meters operating from coin-cell or AA batteries.

IC Role / Device Role / Timing Role: Primary 5.0 V reference for 24-bit sigma-delta ADC and display driver biasing.

Use Value: 19 µA knee current extends battery life >2× vs. legacy references; ±1% tolerance eliminates factory calibration steps.

Use Scenario: Benchtop LCR meters and programmable DC sources requiring stable internal voltage standards.

IC Role / Device Role / Timing Role: Reference source for DAC-controlled output stages and self-test calibration loops.

Use Value: 30 ppm/°C tempco ensures <±0.01% reading drift over lab ambient variations; 0.4 Ω slope resistance maintains accuracy during dynamic load switching.

Industrial Process Transmitters

Smart Energy Metering Modules

Use Scenario: 4–20 mA loop-powered field transmitters with integrated analog front-ends.

IC Role / Device Role / Timing Role: Precision excitation reference for RTD/thermocouple signal conditioning and ADC reference.

Use Value: Stable operation down to 25 µA enables full functionality within 3.5 mA loop budget; -40°C to +85°C rating matches industrial enclosure requirements.

Use Scenario: DIN-rail mounted electricity meters performing revenue-grade kWh measurement.

IC Role / Device Role / Timing Role: Reference for metrology-grade ADCs measuring voltage, current, and power factor simultaneously.

Use Value: 105 µV_rms noise contributes <0.005% error to Class 0.2 metering accuracy; green compound ensures long-term reliability in sealed enclosures.

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), 100 ppm/°C max tempco, requires external resistor network	Used where programmable output or higher current sinking (>100 mA) is needed	Select when design requires adjustable output or >5 mA sink capability; adds component count and layout area
REF3050AIDBZR	Fixed 5.0 V series reference, 50 ppm/°C max tempco, 50 µA min operating current	Preferred in noise-sensitive, high-PSRR applications with ample supply headroom	Select when PSRR >70 dB and ultra-low noise (<50 µV_rms) are mandatory; requires ≥100 mV dropout margin

Compared with TLVH431AIDBZR and REF3050AIDBZR, the ZRC500F03TC uniquely combines ultra-low knee current (19 µA), capacitor-free stability, and SOT23-3 footprint-making it optimal for space- and power-constrained fixed-voltage reference roles where simplicity and startup reliability are prioritized over adjustability or ultra-low-noise specs.

Availability

ZRC500F03TC is available at Aetrix Electronics and suitable for battery-powered portable meters, precision test equipment, and industrial process transmitters requiring stable component supply with guaranteed long-term continuity.

Supply support for ZRC500F03TC 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, serving industrial, computing, consumer, and communications markets with high-reliability components.

The ZRC500 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, space-constrained applications demanding stable 5.0 V references without external compensation components.

FAQ

What is the minimum operating current required for ZRC500F03TC to regulate properly?

The ZRC500F03TC achieves stable regulation at a typical knee current of 19 µA, with guaranteed operation starting at 25 µA across the full industrial temperature range. Below 25 µA, output voltage may deviate beyond specifications due to insufficient bandgap bias current.

Can ZRC500F03TC drive capacitive loads directly without oscillation?

Yes - the ZRC500F03TC is internally compensated and stable with capacitive loads up to at least 1 µF, as confirmed by Diodes' datasheet transient response waveforms and application notes. No external series resistor or isolation capacitor is required for typical ADC input capacitance (10–100 pF).

How does the ZRC500F03TC's temperature coefficient compare to standard Zener references?

The ZRC500F03TC achieves 30 ppm/°C typical TC - significantly better than conventional 5.0 V Zener diodes (typically 50–100 ppm/°C). This improvement stems from its bandgap core architecture, which inherently cancels first-order thermal drift, enabling tighter system-level accuracy over temperature.

Is ZRC500F03TC compatible with lead-free reflow soldering processes?

Yes - the ZRC500F03TC uses a green molding compound compliant with RoHS and JEDEC J-STD-020, supporting peak reflow temperatures up to 260°C. Its SOT23-3 package is qualified for standard lead-free solder profiles including ramp-to-spike and soak profiles.

ZRC500F03TC 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:: 5 mA

Tolerance:: ±3%

Temperature Coefficient:: 90ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 105µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 25 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

ZRC500F03TC FAQ

1.How can I place an order for ZRC500F03TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRC500F03TC 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 ZRC500F03TC reliable?

The price and inventory of ZRC500F03TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRC500F03TC is usually 5 days.

3.What payment methods are accepted for ZRC500F03TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRC500F03TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRC500F03TC?

ZRC500F03TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRC500F03TC 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 ZRC500F03TC?

For technical support, including ZRC500F03TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRC500F03TC requirements.

6.How does Aetrix verify that ZRC500F03TC is sourced from the original manufacturer or authorized distributors?

All ZRC500F03TC 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 ZRC500F03TC meets industry standards.

7.What is the process for return or replacement of ZRC500F03TC?

All ZRC500F03TC units undergo pre-shipment inspection (PSI). If there is an issue with ZRC500F03TC, 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 ZRC500F03TC part is unused and in its original packaging.

Return procedure for ZRC500F03TC:

1.Submit a request within 90 days.

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

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