Alpha & Omega Semiconductor Inc. AON7514

Overview

AON7514 from Alpha & Omega Semiconductor is a 30V N-Channel enhancement-mode MOSFET in DFN 3×3 EP package, featuring R_DS(ON) < 5 mΩ at V_GS = 10 V and < 8.5 mΩ at V_GS = 4.5 V, 30 A continuous drain current, and low gate charge (Q_g = 15.7–22.5 nC). It serves as a high-efficiency synchronous rectifier or power switch in DC/DC converters for computing and telecom POL applications.

For engineers reviewing the AON7514 datasheet, pinout, applications, or equivalent options, key selection criteria include its 4.5 V logic-level gate drive compatibility, 100% UIS-tested ruggedness, low R_DS(ON) at low V_GS, thermal performance (R_θJC = 5.4 °C/W), and DFN 3×3 EP footprint suitability for high-density power stages.

Technical Context

The AON7514 employs AlphaMOS LV trench technology optimized for low-voltage, high-current switching. Its gate threshold voltage (1.2–2.2 V) enables reliable turn-on with 3.3 V or 4.5 V controllers, while low Q_gd (3.2 nC) and fast switching (t_r = 2.5 ns, t_f = 4 ns) reduce switching losses in high-frequency buck converters.

It integrates a robust body diode (V_SD = 0.7–1.0 V, Q_rr = 13.6 nC, t_rr = 10.2 ns) and is fully characterized for unclamped inductive switching (UIS), supporting reliable operation in hard-switched topologies without external snubbers.

Key Specifications

Pinout & Package

Package: DFN 3×3 mm with exposed thermal pad (EP); bottom-side thermal interface required for rated power dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel MOSFET applications.

Compared with SiR872DP and IRF7759L2TRPBF, the AON7514 delivers best-in-class R_DS(ON)/Q_g ratio in a thermally optimized 3×3 mm DFN, making it optimal for space-constrained, high-frequency, high-current POL converters where thermal resistance and gate drive efficiency are critical.

Availability

AON7514 is available at Aetrix Electronics and suitable for server point-of-load regulators, telecom isolated DC/DC converters, and industrial motor drive gate drivers requiring stable component supply, consistent parametric performance, and long-term production availability.

Supply support for AON7514 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

Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-performance MOSFETs, IGBTs, and power ICs for computing, consumer, and industrial markets.

The AON7514 belongs to the AlphaMOS LV trench MOSFET product line, engineered specifically for low-voltage, high-current DC/DC conversion with emphasis on R_DS(ON) optimization at logic-level gate voltages and ruggedness in real-world switching stress conditions.

FAQ

What is the maximum continuous drain current rating for AON7514?

The AON7514 has a continuous drain current rating of 30 A at case temperature T_C = 25 °C, derating to 23 A at T_C = 70 °C and 12 A at T_C = 100 °C. This rating is package-limited and assumes proper PCB copper area and thermal vias under the exposed pad to maintain junction temperature ≤150 °C. The AON7514 datasheet specifies these values in the Absolute Maximum Ratings table on page 1.

Does AON7514 support 3.3 V gate drive?

Yes, the AON7514 supports 3.3 V gate drive due to its low gate threshold voltage range of 1.2–2.2 V and R_DS(ON) < 8.5 mΩ at V_GS = 4.5 V. At 3.3 V, it achieves partial enhancement with R_DS(ON) approximately 12–15 mΩ (per Figure 5), making it usable in 3.3 V controller designs where moderate conduction loss is acceptable. Full specification compliance requires ≥4.5 V.

What is the thermal resistance from junction to case (RθJC) for AON7514?

The AON7514 has a junction-to-case thermal resistance (R_θJC) of 5.4 °C/W, measured with the device mounted to a large heatsink. This value enables precise thermal design when the exposed pad is soldered to a dedicated thermal plane on the PCB. The AON7514's low R_θJC supports high-power operation in compact layouts where case temperature can be actively managed.

Is AON7514 suitable for synchronous rectification in isolated flyback converters?

Yes, the AON7514 is suitable for synchronous rectification in isolated flyback converters due to its low R_DS(ON) at 4.5 V, fast body diode recovery (t_rr = 10.2 ns, Q_rr = 13.6 nC), and 100% UIS testing. Its DFN 3×3 EP package provides low parasitic inductance, reducing ringing during reverse recovery. The AON7514's gate threshold and capacitance profile also support reliable timing control with common SR controller ICs.

What does "100% Rg tested" mean for AON7514?

"100% Rg tested" means every AON7514 unit undergoes production screening for gate resistance (R_g = 0.7–2.3 Ω), ensuring consistency in switching speed and gate driver interaction. This test verifies that gate resistance falls within the specified range, minimizing unit-to-unit variation in turn-on/turn-off timing and reducing risk of shoot-through in half-bridge configurations. The AON7514's tight R_g tolerance supports predictable, repeatable switching behavior in high-volume power designs.