Diodes Incorporated DDZ9707T-7

Overview

DDZ9707T-7 from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage of 20 V, ±5% tolerance (19.0–21.0 V), 150 mW power dissipation, 0.05 µA maximum reverse leakage at 15.2 V, and SOD523 package. It provides precise voltage regulation in low-power biasing, reference, and overvoltage protection circuits for portable consumer electronics and sensor signal conditioning.

For engineers reviewing the DDZ9707T-7 datasheet, DDZ9707T-7 pinout, DDZ9707T-7 application, or DDZ9707T-7 equivalent, key selection criteria include zener voltage accuracy, low leakage at rated VR, thermal resistance (833 °C/W), sharp breakdown characteristics, and compatibility with automated SMT assembly on FR-4 PCBs.

Technical Context

This Zener diode operates in reverse-bias breakdown mode to maintain stable voltage across its terminals under varying current loads (1–100 mA typical). Its sharp knee and low dynamic impedance (<100 Ω at IZ = 5 mA, per Fig. 13) ensure minimal voltage deviation during transient load changes.

The device exhibits a positive temperature coefficient (~0.07 %/°C at 20 V, per Fig. 17), enabling predictable drift behavior in ambient temperature ranges from –65 °C to +150 °C. Its SOD523 package supports high-density layouts while maintaining thermal performance under derated power conditions.

Key Specifications

Pinout & Package

Package: SOD523 - ultra-small plastic surface-mount case (0.80 mm × 0.60 mm × 0.60 mm), cathode marked by band, matte tin-plated terminals, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584C20LT1G and MMSZ5248BT1G, DDZ9707T-7 offers the lowest leakage and smallest footprint-critical for miniaturized, battery-operated systems-while trading off absolute power headroom and ease of manual handling.

Availability

DDZ9707T-7 is available at Aetrix Electronics and suitable for portable power management, sensor signal conditioning, microcontroller reset circuits, and LED driver bias references requiring stable component supply and long-term obsolescence planning.

Supply support for DDZ9707T-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 markets.

This device belongs to Diodes' DDZ9689T–DDZ9717T Zener diode family, engineered for precision voltage regulation in space-constrained, low-power applications where sharp breakdown and ultra-low leakage are essential.

FAQ

What is the maximum Zener test current (IZT) for DDZ9707T-7?

The datasheet specifies IZT = 50 µA for all devices in the DDZ9689T–DDZ9717T series, including DDZ9707T-7. This current defines the condition under which the nominal Zener voltage (20 V) and tolerance (±5%) are guaranteed. Operation at higher currents (e.g., 1–10 mA) is permitted within the 150 mW power limit and yields lower dynamic impedance.

Can DDZ9707T-7 be used in place of a 20 V Zener in an existing SOD-123 design?

No-it uses the smaller SOD523 package (0.80 × 0.60 mm) versus SOD-123 (3.7 × 1.6 mm), making it incompatible with SOD-123 footprints without PCB redesign. Pad layout, stencil aperture, and reflow profile must be validated for SOD523. Mechanical dimensions are provided in DS30553 Rev. 8–2, page 6.

What is the Zener impedance (ZZT) of DDZ9707T-7 at 5 mA?

Per Figure 13 in DS30553, the typical Zener impedance for DDZ9707T–DDZ9709T is ~70 Ω at IZ = 5 mA and TA = 25°C. This value reflects dynamic resistance near the regulation knee and directly impacts output voltage stability under varying load current.

Is DDZ9707T-7 suitable for automotive applications?

It meets AEC-Q200 stress test requirements for passive components when qualified per Diodes' internal qualification program (documented in product change notices), and its –65 °C to +150 °C operating range covers extended temperature automotive zones. However, it is not AEC-Q200 certified out-of-box-designers must validate reliability per their specific application environment.