Diodes Incorporated ZRC330A01STOB

Overview

ZRC330A01STOB from Diodes Incorporated is a precision 3.3 V bandgap voltage reference IC with ±1% initial tolerance, 15 µA typical knee current, and 0.6 Ω typical slope resistance, designed for low-power, battery-operated instrumentation and data acquisition systems where stable output without external capacitance is required.

For engineers reviewing the ZRC330A01STOB datasheet, ZRC330A01STOB pinout, ZRC330A01STOB application, or ZRC330A01STOB equivalent, key selection criteria include knee current (15 µA), temperature coefficient (15 ppm/°C), load stability up to 5 mA, and SOT23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The ZRC330A01STOB implements a two-terminal shunt reference topology using a bandgap core, operating in reverse breakdown mode with no anode-cathode polarity distinction in circuit placement. It achieves regulation by maintaining constant voltage across its terminals under varying load currents from 15 µA to 5 mA.

Its internal design eliminates need for external stabilization capacitors and ensures stability with capacitive loads up to 10 nF. Transient response settles within 5 µs, and dynamic impedance remains ≤1.2 Ω at 100 Hz with 1 mA AC current superimposed on DC bias.

Key Specifications

Pinout & Package

Package: SOT23-3 (suffix "F"), surface-mount, 3-pin plastic package with standard footprint and thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431AIDBZR and MAX6003EUR+T, ZRC330A01STOB uniquely supports 15 µA knee current and capacitor-free operation-critical for energy-harvesting and coin-cell designs where every nanoamp matters and board space is constrained.

Availability

ZRC330A01STOB is available at Aetrix Electronics and suitable for battery-powered multimeters, portable gas detectors, and precision RTD signal conditioning requiring stable component supply with long-term manufacturability.

Supply support for ZRC330A01STOB 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 centers across Asia and manufacturing in Taiwan and China.

The ZRC330 series belongs to Diodes' precision voltage reference product line, engineered specifically for micropower, space-constrained applications demanding low knee current and inherent stability without external components.

FAQ

Is ZRC330A01STOB a three-terminal or two-terminal device?

ZRC330A01STOB is functionally a two-terminal shunt reference: Pin 1 (Anode) and Pin 2 (Cathode) form the active reference terminals; Pin 3 is internally unconnected and must remain floating. Its operation requires only a series resistor between supply and Cathode, with Anode tied to ground.

Can ZRC330A01STOB drive a 10 nF capacitive load directly?

Yes-the ZRC330A01STOB is explicitly characterized as stable with capacitive loads up to at least 10 nF, per its datasheet Figure 1-43 and stability testing. No external compensation capacitor is required, making it suitable for direct connection to ADC sample-and-hold inputs or crystal oscillator load networks.

What is the maximum continuous current ZRC330A01STOB can sink?

The recommended operating current range is 20 µA to 5 mA. While the absolute maximum reverse current rating is 25 mA, sustained operation above 5 mA degrades long-term stability and increases self-heating beyond specification limits; 5 mA is the practical upper limit for continuous use at 25°C ambient.

Does ZRC330A01STOB require derating at elevated temperatures?

Yes-power dissipation must be derated linearly above 25°C ambient. For the SOT23-3 package (330 mW at 25°C), thermal resistance θ_JA is ~220°C/W; at 85°C ambient, maximum allowable power drops to ~150 mW, limiting max current to ~45 mA at 3.3 V-though electrical specs are only guaranteed up to 5 mA per datasheet conditions.