Diodes Incorporated ZRC500F01TA

Overview

ZRC500F01TA 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 ZRC500F01TA datasheet, ZRC500F01TA pinout, ZRC500F01TA application, or ZRC500F01TA equivalent, key selection criteria include low-knee-current operation, capacitor-free stability, industrial temperature range (–40°C to +85°C), and SOT23-3 package compatibility in space-constrained designs.

Technical Context

The ZRC500F01TA implements a bandgap-based reverse-biased Zener topology optimized for micropower operation, achieving stable 5.0 V output with minimal current dependency. Its slope resistance of 0.4 Ω (typ) and dynamic impedance of 0.3 Ω (at 1 mA, 100 Hz) ensure tight regulation under varying load and frequency conditions.

Designed for direct replacement of traditional shunt references, it eliminates need for stabilization capacitors while maintaining <10 µs settling time after load transients. The device sustains full specification performance across –40°C to +85°C and withstands transient currents up to 200 mA due to rugged 20 V process technology.

Key Specifications

Pinout & Package

Supplied in SOT23-3 (suffix F) surface-mount package: 1.83 mm × 2.90 mm × 1.10 mm body, 0.95 mm pitch, green molding compound (Br/Sb-free).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL431CDBZR and LM4040CIM3-5.0, the ZRC500F01TA uniquely combines fixed 5.0 V output, ±1% tolerance, ultra-low 19 µA knee current, and capacitor-free stability-making it optimal for space- and power-constrained 5 V reference applications where simplicity and micropower operation are mandatory.

Availability

ZRC500F01TA is available at Aetrix Electronics and suitable for portable instrumentation, battery management units, and smart energy meters requiring stable component supply with guaranteed long-term availability and consistent parametric performance.

Supply support for ZRC500F01TA 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, cost-optimized components for industrial, computing, and consumer markets.

The ZRC series targets precision analog subsystems in portable and battery-operated equipment, emphasizing micropower operation, small footprint, and robustness against transient stress without external components.

FAQ

What is the recommended PCB layout for ZRC500F01TA to minimize thermal drift?

Use a thermally isolated copper pad for the SOT23-3 GND (pin 2) with minimal thermal vias to inner layers. Keep traces short and wide between VR (pin 3) and load, avoid routing heat-generating components nearby, and maintain ≥1 mm clearance from board edges to reduce ambient gradient effects. Follow Diodes' suggested SOT23 pad layout (2.0 mm × 1.35 mm) for optimal thermal coupling control.

Can ZRC500F01TA be used in series with other references to generate non-standard voltages?

No - ZRC500F01TA is a shunt reference designed for parallel connection across a current-source-supplied load. Connecting multiple units in series violates its reverse-bias operating mode and risks thermal runaway or breakdown. For non-5.0 V outputs, use an op-amp buffer with resistive scaling or select a different reference family such as the AP431 series.

Does ZRC500F01TA require derating at elevated ambient temperatures?

Yes - power dissipation must be derated above +25°C ambient. At +85°C, maximum allowable power drops to 220 mW (based on 330 mW @ 25°C and 6.3 mW/°C derating slope). Ensure IR × VR remains below this limit; for 5 mA operation at 5.0 V, ambient must stay ≤55°C to avoid exceeding derated dissipation.

Is ZRC500F01TA qualified for automotive applications per AEC-Q200?

No - ZRC500F01TA is specified for industrial temperature range (–40°C to +85°C) but is not AEC-Q200 qualified. It lacks automotive-specific stress testing (e.g., vibration, humidity, ESD levels per AEC standards). For automotive use, consider Diodes' AEC-Q200-qualified ZRxxxQ series or similar qualified alternatives.