Diodes Incorporated ZRC330F03TC

Overview

ZRC330F03TC from Diodes Incorporated is a precision 3.3 V bandgap voltage reference IC in SOT23-3 package, featuring ±3% initial tolerance, 15 µA typical knee current, 0.6 Ω typical slope resistance, and stable operation from 20 µA to 5 mA-designed for low-power portable instrumentation and crystal oscillator biasing.

For engineers reviewing the ZRC330F03TC datasheet, ZRC330F03TC pinout, ZRC330F03TC application, or ZRC330F03TC equivalent, key selection criteria include knee current, temperature coefficient (15–50 ppm/°C), dynamic impedance (<1.2 Ω), noise (75 µV_rms, 10 Hz–10 kHz), and capacitor-free stability in battery-powered measurement systems.

Technical Context

The ZRC330F03TC implements a bandgap-based reverse-breakdown architecture optimized for micropower operation without external stabilization capacitance. It maintains regulation across 20 µA–5 mA load current while delivering 3.3 V with <±3% accuracy at 25°C and drift of ≤50 ppm/°C over –40°C to +85°C.

Its low 0.6 Ω slope resistance and 75 µV_rms wideband noise support high-precision analog front-ends. Transient response settles within microseconds, enabling use in fast-cycling data acquisition and low-noise crystal oscillator bias networks.

Key Specifications

Pinout & Package

Supplied in SOT23-3 package (JEDEC TO-236AB), 2.9 mm × 1.3 mm footprint, 1.1 mm height, with gull-wing leads and green molding compound (Br/Sb-free).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV431ACDBVR and MAX6033AESA+, the ZRC330F03TC offers the lowest knee current and smallest footprint for fixed 3.3 V use, trading absolute accuracy for ultra-low power and capacitor-free simplicity in portable instrumentation.

Availability

ZRC330F03TC is available at Aetrix Electronics and suitable for battery-powered multimeters, precision data acquisition front-ends, and crystal oscillator bias networks requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZRC330F03TC 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, low-power, and space-efficient solutions for industrial, computing, and consumer markets.

The ZRC330 series belongs to Diodes' precision voltage reference product line, engineered specifically for micropower, capacitor-free operation in portable and measurement-critical applications where size, startup speed, and knee current are design constraints.

FAQ

What is the maximum capacitive load the ZRC330F03TC can drive without instability?

The ZRC330F03TC is explicitly characterized as stable with capacitive loads up to 10 nF without external compensation, per DS32163 Rev. 7–2 Section 6. This makes it suitable for direct connection to ADC sample-and-hold capacitors and crystal oscillator load networks without added series resistance or isolation.

Does ZRC330F03TC require a minimum load current to maintain regulation?

No-ZRC330F03TC operates stably down to 15 µA knee current and does not require a minimum load. Its bandgap design maintains regulation even with zero external load, provided supply current remains ≥15 µA. This enables use in standby circuits where downstream loads may be fully disconnected.

Can ZRC330F03TC replace ZRC330F02TA or ZRC330F01TA in existing designs?

Yes-ZRC330F03TC shares identical SOT23-3 package, pinout, and electrical behavior with F01TA and F02TA variants; only initial tolerance differs (±3% vs. ±1%/±2%). No layout or schematic changes are needed, though system-level accuracy verification is recommended if tighter tolerance was previously relied upon.

What is the thermal resistance (θ_JA) of ZRC330F03TC in standard SOT23 PCB layout?

Per DS32163 Rev. 7–2 Absolute Maximum Ratings, the SOT23 package has a typical junction-to-ambient thermal resistance of 300°C/W under standard JEDEC test conditions (single-layer 1 in² copper pad). With 2 oz copper and thermal vias, θ_JA can be reduced to ~120°C/W, supporting continuous 5 mA operation at ambient up to 75°C.