onsemi MM5Z7V5

Overview

MM5Z7V5 from ON Semiconductor (formerly Fairchild) is a surface-mount Zener diode designed for precision voltage regulation and transient overvoltage protection in low-power circuits. It delivers a nominal Zener voltage of 7.5 V at 5 mA test current, with ±0.4 V tolerance (7.0–7.9 V), 15 Ω dynamic impedance at I_ZT, and 200 mW power dissipation in the ultra-compact SOD-523F package - commonly used in portable battery management and USB interface ESD clamp circuits.

For engineers reviewing the MM5Z7V5 datasheet, pinout, applications, or equivalent options, key selection considerations include its 7.5 V regulation accuracy, 15 Ω Zener impedance at 5 mA, 1 µA maximum reverse leakage at 5 V, 0.7 mm height constraint, and compatibility with automated high-density PCB assembly.

Technical Context

The MM5Z7V5 operates as a two-terminal voltage reference device relying on controlled avalanche breakdown in silicon PN junction. Its electrical behavior is defined under pulsed 10 ms test conditions to minimize self-heating, with specified Zener voltage (V_Z) and impedance (Z_ZT) measured at I_ZT = 5 mA and Z_ZK = 160 Ω at I_ZK = 1 mA.

Thermal resistance is rated at 500 °C/W (junction-to-ambient, FR-4 PCB), limiting continuous DC power handling; operation across –55 °C to +150 °C ambient enables use in automotive body electronics and industrial sensor signal conditioning where stable clamping is required without active bias control.

Key Specifications

Pinout & Package

SOD-523F is a 2-lead, flat-lead, surface-mount plastic package with cathode indicated by a band. Total height is under 0.70 mm, optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584-C7V5 and MMSZ5236B, the MM5Z7V5 offers the lowest profile (0.7 mm) and tightest Zener impedance (15 Ω) at standard 5 mA test current - making it optimal for miniaturized, precision-clamp designs where height and regulation stability are critical.

Availability

MM5Z7V5 is available at Aetrix Electronics and suitable for battery management systems, USB interface protection, low-power sensor biasing, and microcontroller reset circuits requiring stable component supply across automotive, industrial, and consumer electronics programs.

Supply support for MM5Z7V5 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

ON Semiconductor (formerly Fairchild Semiconductor) is a global supplier of energy-efficient semiconductor components, specializing in power management, analog, and discrete devices for automotive, industrial, and computing markets.

The MM5Z7V5 belongs to the MM5Z series of miniature Zener diodes engineered for high-density PCB integration and precision voltage reference in space-constrained, low-power applications - emphasizing manufacturability, thermal robustness, and regulatory compliance.

FAQ

What is the Zener voltage tolerance of the MM5Z7V5?

The MM5Z7V5 has a specified Zener voltage range of 7.0 V to 7.9 V at I_ZT = 5 mA, corresponding to a ±0.4 V absolute tolerance around the nominal 7.5 V value. This tolerance is verified under pulsed 10 ms test conditions per the official ON Semiconductor datasheet Rev. 1.5. The MM5Z7V5 does not specify a percentage tolerance band; design margins must be based on these hard min/max limits.

Can the MM5Z7V5 be used in place of a 7.5 V linear regulator?

No - the MM5Z7V5 is a passive Zener diode, not a regulated voltage source. It requires an external current-limiting resistor and cannot supply regulated output current without significant voltage droop under load. Unlike a linear regulator, the MM5Z7V5 provides no current gain, dropout control, or thermal shutdown. For active regulation, consider dedicated LDOs; the MM5Z7V5 serves best as a reference or clamp, not a power rail generator.

What is the maximum continuous reverse current the MM5Z7V5 can handle?

The MM5Z7V5 is rated for 200 mW total power dissipation. At its nominal 7.5 V Zener voltage, this corresponds to a maximum continuous reverse current of approximately 26.7 mA (200 mW ÷ 7.5 V). Exceeding this current risks thermal runaway due to its 500 °C/W junction-to-ambient thermal resistance. Pulse operation allows higher peak currents, but DC design must stay within this limit - confirmed in the Absolute Maximum Ratings table of the MM5Z2V4–MM5Z75V datasheet.

Is the MM5Z7V5 suitable for automotive under-hood applications?

Yes - the MM5Z7V5 is qualified for operation from –55 °C to +150 °C, meeting extended temperature requirements for non-junction-box automotive locations such as engine control sensors or body control modules. Its SOD-523F package, matte tin finish, and Pb-free/RoHS compliance align with AEC-Q200 stress test expectations for discrete Zeners. However, it is not AEC-Q200 certified out-of-box; qualification testing must be performed at system level per application needs.

How does the MM5Z7V5 compare to the MM5Z6V8 in terms of Zener impedance?

The MM5Z7V5 specifies a maximum Zener impedance (Z_ZT) of 15 Ω at I_ZT = 5 mA, while the MM5Z6V8 lists 15 Ω as well - both share identical impedance performance at their respective test currents. However, the MM5Z6V8's nominal voltage is 6.8 V (range 6.4–7.2 V), so direct substitution alters regulation point and may affect circuit headroom. Impedance values are not interchangeable across voltages; always verify Z_ZT at the actual operating current for each MM5Z7V5 or MM5Z6V8 instance.