Diodes Incorporated DDZ9691S-7

Overview

DDZ9691S-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal Zener voltage 6.2 V (min 5.89 V, max 6.51 V), 50 µA maximum reverse leakage at 5 V, 200 mW power dissipation, and SOD-323 package. It delivers sharp breakdown characteristics and tight ±5% V_Z tolerance for voltage reference and regulation in space-constrained analog circuits.

For engineers reviewing the DDZ9691S-7 datasheet, DDZ9691S-7 pinout, DDZ9691S-7 application, or DDZ9691S-7 equivalent, key selection criteria include Zener voltage accuracy at I_ZT = 5 mA, low temperature coefficient (~0.04 %/°C near 6.2 V), cathode-band polarity marking, and thermal resistance of 625 °C/W on FR-4.

Technical Context

This device operates as a two-terminal voltage reference diode, conducting in reverse bias above its precisely controlled Zener breakdown threshold. Its sharp knee and low dynamic impedance (<15 Ω at I_Z = 5 mA, per Fig. 11) enable stable regulation under varying load conditions.

Designed for thermal equilibrium measurement at T_T = 30°C ±1°C, it exhibits minimal self-heating error and supports automated SMT assembly with RoHS-compliant matte tin terminals and moisture sensitivity level 1 handling.

Key Specifications

Pinout & Package

Package: SOD-323 - ultra-small plastic surface-mount case (2.30–2.70 mm length, 1.20–1.40 mm width, 0.25–0.35 mm thickness), cathode band marked, weight ≈ 0.004 g.

Key Features

Applications

Availability

DDZ9691S-7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB-C power delivery feedback, and automotive body control modules requiring stable component supply with consistent parametric performance across production lots.

Supply support for DDZ9691S-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, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer applications.

The DDZ9689S–DDZ9717S series targets precision voltage reference needs in miniaturized SMT designs, emphasizing tight V_Z tolerance, low leakage, and robust thermal performance in the SOD-323 footprint.

FAQ

What is the test condition for the specified Zener voltage of 6.2 V?

The nominal 6.2 V Zener voltage is measured at I_ZT = 5 mA with the device junction at thermal equilibrium at T_T = 30°C ±1°C, per Note 3 in DS30409 Rev. 6-2. This ensures repeatability and eliminates self-heating artifacts during characterization.

Can DDZ9691S-7 replace a 6.2 V Zener in a 12 V automotive regulator circuit?

Yes-its 200 mW rating supports up to ~32 mA continuous Zener current at 6.2 V, sufficient for biasing error amplifiers in linear regulators. Its 625 °C/W R_θJA requires adequate copper area on FR-4 to maintain junction temperature below 150°C under worst-case ambient.

Is DDZ9691S-7 qualified for automotive applications?

No-DDZ9691S-7 is not AEC-Q101 qualified. Only specific variants in this family (e.g., DDZ9705S) carry that qualification. This part meets industrial reliability standards but lacks automotive-grade stress testing and lot traceability documentation.

How does the SOD-323 package affect PCB layout for optimal thermal performance?

Use the recommended pad layout from Diodes' AP02001 application note: 0.65 mm × 1.35 mm solder pads with 0.25 mm clearance. Avoid thermal reliefs on anode/cathode traces to maximize heat conduction to internal copper planes, reducing junction-to-ambient resistance by up to 30%.