Alpha & Omega Semiconductor Inc. AONT21313C

Overview

AONT21313C from Alpha & Omega Semiconductor is a 30V P-Channel MOSFET optimized for notebook AC-in load switching and battery protection circuits, featuring R_DS(ON) < 32 mΩ at V_GS = −10 V, continuous drain current of −7.4 A, and DFN 2×2B package with thermal resistance R_θJA = 80 °C/W.

For engineers reviewing the AONT21313C datasheet, pinout, applications, or equivalent options, key selection criteria include verified low-threshold gate drive compatibility (V_GS(th) = −1.2 to −2.2 V), body-diode forward voltage (V_SD = −0.8 to −1.0 V), and unclamped inductive switching robustness per AOS test conditions.

Technical Context

This device implements advanced trench-gate technology to achieve high channel density and low conduction loss in a thermally enhanced DFN package. Its negative threshold voltage enables direct interface with standard 3.3 V/5 V logic-level controllers without level-shifting circuitry.

The MOSFET supports bidirectional current flow in battery charge/discharge paths via its intrinsic body diode, with reverse recovery time t_rr = 12 ns and Q_rr = 17 nC under IF = −7.4 A and di/dt = 500 A/ms - critical for minimizing switching losses in synchronous buck or OR-ing configurations.

Key Specifications

Pinout & Package

Package: DFN 2×2B (2 mm × 2 mm, 0.65 mm height, exposed drain pad on bottom). Pin 1 is marked by notch or dot; top view shows Source (S) at corner, Gate (G) adjacent, Drain (D) occupying remaining three terminals including exposed pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-Channel MOSFET applications.

Compared with AONT21313C, AON6254 offers slightly better conduction efficiency but narrower gate drive margin, while Si2301DDS trades significant R_DS(ON) and thermal performance for ultra-compact size - making AONT21313C optimal for balanced 3–7 A load-switch designs requiring both efficiency and robust thermal management.

Availability

AONT21313C is available at Aetrix Electronics and suitable for notebook AC-in load switching, battery protection charge/discharge, USB-C power delivery input protection, and industrial 24 V DC power sequencing requiring stable component supply and long-term lifecycle support.

Supply support for AONT21313C 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-efficiency MOSFETs, IGBTs, and power modules for computing, consumer, and industrial markets.

The AONT21313C belongs to AOS's advanced trench P-Channel MOSFET product line, engineered specifically for high-current, low-voltage load switching applications demanding minimal gate drive complexity and superior thermal performance in compact packages.

FAQ

What is the maximum continuous drain current rating for AONT21313C at 70°C ambient temperature?

The AONT21313C supports −1.7 A continuous drain current at T_A = 70°C with standard PCB layout (1 in² 2 oz copper). This derating reflects thermal limits imposed by its R_θJA = 80 °C/W and T_J(MAX) = 150°C. At T_A = 25°C, the rating increases to −7.4 A. Designers must verify actual board thermal performance using the normalized transient impedance curve (Figure 11) for pulsed operation.

Does AONT21313C support logic-level gate drive from a 3.3 V microcontroller?

Yes, AONT21313C supports direct 3.3 V logic-level gate drive due to its V_GS(th) range of −1.2 to −2.2 V. At V_GS = −3.3 V, R_DS(ON) remains below 55 mΩ (per Figure 5), enabling usable conduction. However, full −7.4 A capability requires V_GS ≤ −4.5 V; for robust 3.3 V-only operation, confirm system-level margin using the transfer characteristics in Figure 2.

What is the body diode forward voltage specification for AONT21313C?

The AONT21313C body diode forward voltage V_SD is specified as −0.8 V (typical) to −1.0 V (maximum) at I_S = −1 A and T_J = 25°C (per Electrical Characteristics table). This low V_SD minimizes conduction loss during reverse-current conditions in battery protection and OR-ing applications, and is validated across temperature in Figure 6.

Can AONT21313C be used in unclamped inductive switching (UIS) applications?

Yes, AONT21313C is characterized for unclamped inductive switching per AOS test methodology (Page 5 schematic). Its BVDSS = −30 V and energy rating support single-pulse UIS events up to E_AS ≈ 35 mJ (derived from Figure 9 SOA and BVDSS). Designers must limit peak current and pulse width per the Safe Operating Area curve to avoid junction overheating during fault conditions.

Is the DFN 2×2B package of AONT21313C lead-free and RoHS compliant?

Yes, the AONT21313C DFN 2×2B package is fully RoHS compliant and halogen-free per IPC-1752A requirements, as confirmed in the Product Summary and Absolute Maximum Ratings section. The device uses matte tin (Sn) lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤ 30°C/60% RH.