Diodes Incorporated DDZ9V1C-7

Overview

DDZ9V1C-7 from Diodes Incorporated is a surface-mount precision Zener diode designed for voltage regulation and reference applications in low-power analog circuits. It delivers a nominal Zener voltage of 9.1 V with ±2.8% tolerance (8.83–9.30 V), 8 Ω dynamic impedance at 20 mA test current, and 0.5 µA maximum reverse leakage at 7.0 V, operating across –65°C to +150°C. It is commonly used in power supply feedback loops, ADC reference stabilization, and overvoltage protection circuits.

For engineers reviewing the DDZ9V1C-7 datasheet, DDZ9V1C-7 pinout, DDZ9V1C-7 application, or DDZ9V1C-7 equivalent, key selection criteria include Zener voltage accuracy, low dynamic impedance, thermal stability, SOD123 package compatibility, and compliance with automotive-grade reliability requirements (AEC-Q101 optional via Q-suffix variant).

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation under DC or low-frequency conditions. Its 20 mA Zener test current ensures stable operation in bias networks and shunt regulator topologies, while its 8 Ω Zener impedance at 1 kHz supports minimal output voltage variation under load transients.

The device uses an alloy-42 leadframe with matte tin annealed terminals, enabling robust solderability per MIL-STD-202 Method 208. Its SOD123 package provides a thermal resistance of 425 °C/W (on minimal pad) and 266 °C/W (on 1-in² copper), supporting reliable power dissipation up to 294 mW at 25°C ambient.

Key Specifications

Pinout & Package

Package: SOD123 - molded plastic case with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × W × H); weight ≈ 0.01 g; moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C9V1 and MMSZ5240B, DDZ9V1C-7 offers superior voltage accuracy (±2.8% vs. ±5%) and lower dynamic impedance (8 Ω vs. 10–15 Ω), making it optimal for high-precision feedback and reference roles where regulation stability outweighs raw power handling.

Availability

DDZ9V1C-7 is available at Aetrix Electronics and suitable for switching power supplies, precision analog references, overvoltage protection circuits, and automotive microcontroller reset networks requiring stable component supply and long-term manufacturability.

Supply support for DDZ9V1C-7 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, manufacturing, and sales operations across Asia, Europe, and the Americas.

The DDZ series belongs to Diodes' precision Zener diode product line, engineered specifically for high-accuracy voltage regulation and reference applications in automotive, industrial, and computing systems where tight tolerance and thermal stability are mandatory.

FAQ

What is the maximum continuous power dissipation for DDZ9V1C-7 on a standard FR-4 PCB?

DDZ9V1C-7 supports 294 mW continuous power dissipation at 25°C ambient when mounted on an FR-4 board with minimum recommended SOD123 pad layout (per Note 8). This derates linearly to zero at 150°C ambient, following the curve in Figure 1 of DS30407 Rev. 21-2.

Does DDZ9V1C-7 meet AEC-Q101 qualification?

No - DDZ9V1C-7 is the commercial-grade variant. The automotive-qualified version is DDZ9V1CQ-7, which is AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949-certified facilities. Both share identical electrical specs and SOD123 packaging.

How does the temperature coefficient of DDZ9V1C-7 affect regulation stability?

DDZ9V1C-7 exhibits a typical temperature coefficient of approximately +0.06%/°C near 9.1 V (inferred from Fig. 16–19), resulting in ~±0.54% V_Z drift over –40°C to +125°C. This is suitable for non-critical references but requires compensation in metrology-grade designs.

Can DDZ9V1C-7 be used in place of a 9.1 V bandgap reference?

Only in non-precision applications. Unlike bandgap references, DDZ9V1C-7 has higher temperature drift, no buffered output, and requires external current limiting. It serves best as a cost-effective shunt reference where ±3% total accuracy and simple two-terminal operation are acceptable.