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

Diodes Incorporated ZRB500F01TC

Name: ZRB500F01TC
Brand: Diodes Incorporated
SKU: ZRB500F01TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZRB500F01TC

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZRB500F01TC.pdf

Description:: IC VREF SHUNT 1% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,352

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Product details

Overview

ZRB500F01TC from Diodes Incorporated is a precision 5.0 V micropower voltage reference IC using bandgap circuitry, rated for ±1% initial tolerance, 15 ppm/°C typical temperature coefficient, and stable operation from 50 µA to 15 mA supply current. It operates across –40°C to +85°C, delivers <10 µs transient response, and requires no external capacitor in SOT23-3 package - ideal for battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZRB500F01TC datasheet, ZRB500F01TC pinout, ZRB500F01TC application, or ZRB500F01TC equivalent, key selection criteria include its 1% tolerance, low 50 µA minimum operating current, 15 ppm/°C TC, sub-10 µs transient settling, and SOT23-3 footprint compatibility with space-constrained analog signal chains.

Technical Context

The ZRB500F01TC functions as a two-terminal shunt-mode voltage reference, configured with anode (VR), cathode (GND), and floating/no-connect third terminal. Its bandgap core achieves 5.0 V reverse breakdown at 150 µA test current, with slope resistance of 0.33–1.5 Ω and dynamic impedance of 0.4–1 Ω at 1 mA/100 Hz.

It maintains stability under capacitive loads without external compensation and sustains regulation up to 25 mA absolute maximum forward current. The device's rugged 20 V process enables survival of 200 mA transient surges while delivering 105 µV_rms wideband noise (10 Hz–10 kHz).

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	5.0 V ±1% at 150 µA - ensures accurate ADC/DAC biasing in precision measurement front-ends
Initial Tolerance	±1% - guarantees tight system-level voltage calibration without post-production trimming
Temp Coefficient	15 ppm/°C typical - limits drift to ±0.63 mV over –40°C to +85°C ambient range
Min Operating Current	50 µA - enables operation in ultra-low-power wake-up circuits and energy-harvesting nodes
Transient Response	<10 µs settling - supports fast-switching power sequencing and dynamic load regulation
Noise (10 Hz–10 kHz)	105 µV_rms - preserves SNR in 16-bit+ data acquisition systems
Slope Resistance	0.33–1.5 Ω - minimizes output voltage shift under varying load currents

Pinout & Package

Supplied in SOT23-3 package (JEDEC MO-178AA), with 2.9 mm × 1.35 mm footprint, 1.1 mm height, and green molding compound (Br/Sb-free). Pin 1 is floating or tied to Pin 2 per design flexibility.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	No-connect / optional GND tie	Provides layout flexibility; may be shorted to Pin 2 to reduce parasitic inductance in high-frequency applications
Pin 2	GND (cathode)	Reference return path; must be low-impedance to maintain TC and noise performance
Pin 3	VR (anode)	5.0 V output node; connects to feedback divider or load; requires local decoupling for transient immunity

Key Features

Feature	Design Value
Capacitor-free stability	Operates stably with no external compensation capacitor - reduces BOM count and PCB area in compact designs
Sub-10 µs transient response	Reaches regulation within 10 µs after load step - critical for fast power-up sequencing in portable instruments
15 ppm/°C tempco	Delivers predictable voltage drift across industrial temperature range - eliminates need for software calibration in field-deployed meters
200 mA surge survivability	Withstands short-duration transients up to 200 mA - enhances robustness in noisy industrial power rails
Green packaging	Halogen-free, RoHS-compliant SOT23-3 housing - meets environmental compliance requirements for global OEM shipments

Applications

Portable Multimeters

Precision Data Loggers

Use Scenario: Handheld digital multimeters requiring stable 5 V reference for 24-bit sigma-delta ADCs and auto-ranging circuitry.

IC Role / Device Role / Timing Role: Shunt-mode voltage reference providing excitation and scaling reference for analog front-end gain stages and ADC reference inputs.

Use Value: ±1% tolerance and 15 ppm/°C TC ensure <0.02% full-scale error over temperature - meeting Class II accuracy standards without factory recalibration.

Use Scenario: Battery-powered environmental data loggers sampling temperature, humidity, and pressure at 1 Hz for 1+ year on coin-cell power.

IC Role / Device Role / Timing Role: Low-quiescent-current voltage reference enabling microamp-level sleep current while maintaining reference integrity during wake-up bursts.

Use Value: 50 µA minimum operating current extends battery life by >30% versus 100 µA alternatives, with <10 µs turn-on supporting rapid sensor readout.

Industrial Panel Meters

Calibration Equipment

Use Scenario: DIN-rail-mounted panel meters measuring AC/DC voltage, current, and power in factory automation systems.

IC Role / Device Role / Timing Role: Primary reference source for isolated analog input channels and internal DAC-based display drivers.

Use Value: Stable 5.0 V output under capacitive loads and 25 mA max current supports simultaneous multi-channel sampling without reference droop or oscillation.

Use Scenario: Benchtop calibration sources verifying DMMs, oscilloscopes, and process calibrators traceable to NIST standards.

IC Role / Device Role / Timing Role: Precision shunt reference in programmable voltage output stages with active temperature compensation.

Use Value: 105 µV_rms noise floor and 0.33 Ω slope resistance enable <10 ppm RMS output uncertainty - satisfying ISO/IEC 17025 metrology lab requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDBZR	2.5 V nominal, adjustable via resistors; 2% initial tolerance; 50 ppm/°C TC; requires external resistor network	Used where programmable reference or higher output voltage flexibility is needed, not fixed 5 V	Select when system requires adjustable reference or cost-sensitive volume production with existing TL431 footprint
REF5050AIDR	5.0 V, 0.05% tolerance, 3 ppm/°C TC, 10 µV_rms noise; series topology; requires input headroom	Deployed in metrology-grade equipment demanding sub-ppm stability and ultra-low noise	Choose only if system budget allows premium performance and can accommodate series regulator constraints (dropout voltage, input ≥5.5 V)

Compared with TL431ACDBZR and REF5050AIDR, the ZRB500F01TC offers optimal balance of fixed 5 V accuracy, micropower operation, and SOT23-3 simplicity - making it preferred for cost-sensitive, space-constrained industrial and portable instrumentation where ±1% and 15 ppm/°C meet specification.

Availability

ZRB500F01TC is available at Aetrix Electronics and suitable for portable multimeters, precision data loggers, and industrial panel meters requiring stable component supply with consistent parametric performance across production batches.

Supply support for ZRB500F01TC 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, application-optimized 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 battery-operated instrumentation where size, quiescent current, and thermal drift are critical constraints.

FAQ

What is the recommended minimum load current for stable regulation?

The ZRB500F01TC requires a minimum cathode current of 50 µA to maintain regulation within specifications. Below this, output voltage may deviate beyond ±1% tolerance. Applications must ensure continuous current draw - either through active circuitry or a bleed resistor - especially during sleep modes.

Can Pin 1 be left unconnected in PCB layout?

Yes, Pin 1 is designated as no-connect and may be left floating. However, Diodes' datasheet permits tying it to Pin 2 (GND) to reduce loop inductance in high-speed transient environments. No electrical function is added or altered by this connection.

Does the ZRB500F01TC require an external capacitor for stability?

No. The ZRB500F01TC is internally compensated and remains stable without any external capacitor, even when driving capacitive loads up to 10 nF. This eliminates risk of oscillation and simplifies layout in space-constrained designs.

How does the device behave under transient overcurrent conditions?

The ZRB500F01TC withstands transient forward currents up to 200 mA due to its 20 V process technology. While rated for continuous operation up to 25 mA, brief surges (≤100 µs) at 200 mA will not cause damage or parameter shift - enhancing reliability in electrically noisy industrial environments.

ZRB500F01TC 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:: ±1%

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

ZRB500F01TC FAQ

1.How can I place an order for ZRB500F01TC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZRB500F01TC 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 ZRB500F01TC reliable?

The price and inventory of ZRB500F01TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZRB500F01TC is usually 5 days.

3.What payment methods are accepted for ZRB500F01TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZRB500F01TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZRB500F01TC?

ZRB500F01TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZRB500F01TC 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 ZRB500F01TC?

For technical support, including ZRB500F01TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZRB500F01TC requirements.

6.How does Aetrix verify that ZRB500F01TC is sourced from the original manufacturer or authorized distributors?

All ZRB500F01TC 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 ZRB500F01TC meets industry standards.

7.What is the process for return or replacement of ZRB500F01TC?

All ZRB500F01TC units undergo pre-shipment inspection (PSI). If there is an issue with ZRB500F01TC, 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 ZRB500F01TC part is unused and in its original packaging.

Return procedure for ZRB500F01TC:

1.Submit a request within 90 days.

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

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