Diodes Incorporated ZRB500F02TC

Overview

ZRB500F02TC from Diodes Incorporated is a precision 5.0 V micropower voltage reference IC using bandgap circuit design, rated for ±2% initial tolerance, 15 ppm/°C typical temperature coefficient, and stable operation from 50 µA to 15 mA supply current. It delivers fast transient response (<10 µs), operates across –40°C to +85°C, and is housed in a green SOT23-3 package-ideal for battery-powered instrumentation and portable measurement systems.

For engineers reviewing the ZRB500F02TC datasheet, ZRB500F02TC pinout, ZRB500F02TC application, or ZRB500F02TC equivalent, key selection criteria include its micropower operating range (50 µA min), low slope resistance (0.33 Ω typ), wide capacitive load stability, and industrial-grade thermal drift performance without external compensation.

Technical Context

The ZRB500F02TC functions as a two-terminal shunt-mode voltage reference, sinking current into its cathode (VR) while referencing to GND. Its bandgap core achieves 5.0 V output with minimal dependence on supply variations, enabling use in low-current bias networks and precision ADC/DAC reference rails.

It exhibits inherent stability with capacitive loads up to 10 µF and maintains regulation under transient currents up to 200 mA due to rugged 20 V process technology. The device reaches steady-state output in <10 µs after step-load changes, supporting high-speed data acquisition and dynamic power monitoring circuits.

Key Specifications

Pinout & Package

SOT23-3 package with gull-wing leads, green molding compound (Br/Sb-free), 1.35 mm body width, and 0.95 mm pitch. Pin 1 is VR (cathode), Pin 2 is GND (anode), Pin 3 is NC (not connected) - confirmed per Diodes DS32240 Rev.6-2 pin assignment diagram.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431AIDBZR and LM4040CIM3-5.0, the ZRB500F02TC offers superior thermal stability (15 ppm/°C vs. ≥70 ppm/°C) and lower operating current (50 µA vs. ≥60 µA), making it optimal for long-life, temperature-critical, battery-powered references where fixed 5 V output is acceptable.

Availability

ZRB500F02TC is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable test equipment, and precision data acquisition systems requiring stable component supply and long-term lifecycle support.

Supply support for ZRB500F02TC 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The ZRB series belongs to Diodes' precision analog reference product line, engineered specifically for low-power, high-stability voltage referencing in portable and industrial measurement applications where size, accuracy, and thermal robustness are critical.

FAQ

What is the maximum capacitive load the ZRB500F02TC can drive while remaining stable?

The ZRB500F02TC remains stable with output capacitance up to 10 µF, as verified in Diodes' DS32240 Rev.6-2 characterization. This eliminates need for series isolation resistors in most filter configurations and supports direct connection to ADC reference inputs with local bulk capacitance.

Can ZRB500F02TC operate below 50 µA?

No-50 µA is the guaranteed minimum operating current per datasheet specifications. Operation below this level risks loss of regulation and increased output voltage drift; the device may not maintain 5.0 V output accuracy or stability outside the 50 µA–15 mA specified range.

Is Pin 3 (NC) required to be left floating, or can it be grounded?

Pin 3 is internally unconnected and may be left floating or tied to GND per PCB layout best practices. Diodes' datasheet confirms no electrical function; grounding improves mechanical rigidity and EMI immunity without affecting performance.

How does the ZRB500F02TC handle reverse polarity or overvoltage conditions?

The ZRB500F02TC is a shunt reference and lacks reverse-polarity protection. Applying reverse voltage (>0.3 V) forward-biases internal junctions and may cause permanent damage. Absolute maximum reverse current is 25 mA; sustained overvoltage beyond 20 V risks catastrophic failure per device processing limits.