STMicroelectronics STS11NF30L

Overview

STS11NF30L from STMicroelectronics is an N-channel enhancement-mode power MOSFET in SO-8 package, rated for 30 V V_DS, 11 A continuous drain current at T_C = 25°C, and typical R_DS(on) of 0.0085 Ω at V_GS = 10 V. It features low gate charge (22.5 nC @ 5 V), optimized R_DS(on) × Q_g trade-off, and rugged avalanche capability-designed specifically for high-efficiency CPU core DC/DC converters.

For engineers reviewing the STS11NF30L datasheet, STS11NF30L pinout, STS11NF30L application, or STS11NF30L equivalent, key selection criteria include conduction loss minimization in synchronous buck stages, gate drive compatibility with 5 V logic-level controllers, thermal performance on FR-4 PCBs, and unclamped inductive switching robustness in point-of-load regulators.

Technical Context

This MOSFET employs ST's StripFET™ II process with single-feature-size geometry, enabling high cell density and reproducible low R_DS(on). Its gate threshold voltage (V_GS(th)) is 1 V (min), supporting 5 V gate drive, and it exhibits 15 S forward transconductance (g_fs) at V_DS = 25 V and I_D = 5.5 A.

The device integrates a fast-recovery body diode with t_rr = 42 ns (typ), Q_rr = 52 nC (typ), and I_RRM = 2.5 A at di/dt = 100 A/µs-critical for synchronous rectification and freewheeling in high-frequency buck converters operating up to 1 MHz.

Key Specifications

Pinout & Package

STS11NF30L is housed in a standard SO-8 surface-mount package (JEDEC MS-012AC), with exposed drain pad for thermal enhancement. Pin 1–4 are source terminals (internally paralleled), Pin 5–8 are drain terminals (internally paralleled), and Gate connects to Pin 3 only.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRF7470PBF and DMN3020LSD-13, STS11NF30L delivers the best combination of low R_DS(on), controlled V_GS(th), and automotive-grade ruggedness - making it optimal for high-reliability, high-current CPU core regulation where thermal headroom and transient immunity are critical.

Availability

STS11NF30L is available at Aetrix Electronics and suitable for CPU core voltage regulation, automotive ADAS power supplies, and industrial PLC I/O modules requiring stable component supply and long-term manufacturability.

Supply support for STS11NF30L 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

STS11NF30L belongs to ST's StripFET™ power MOSFET product line, engineered for high-efficiency, high-current DC/DC conversion in space-constrained computing and automotive applications.

FAQ

What is the maximum safe operating frequency for STS11NF30L in a synchronous buck converter?

STS11NF30L supports reliable operation up to 1 MHz in synchronous buck topologies when paired with appropriate gate drive strength (e.g., ≥2 A peak) and PCB layout minimizing loop inductance. Its 22.5 nC Q_g and 42 ns t_rr enable efficient switching at 600–800 kHz in CPU VRMs, with thermal limits becoming dominant above 1 MHz under full load.

Can STS11NF30L be used with 3.3 V gate drive?

No - STS11NF30L has a minimum V_GS(th) of 1 V and typical R_DS(on) specified at V_GS = 5 V and 10 V. At 3.3 V, R_DS(on) rises sharply (>0.025 Ω), increasing conduction loss beyond acceptable levels. It requires ≥4.5 V gate drive for practical use in high-current applications.

Is the SO-8 package of STS11NF30L thermally enhanced?

Yes - the SO-8 package features an exposed drain pad (pins 5–8 tied to internal copper slug) that must be soldered to a large PCB copper area (≥1 inch², 2 oz Cu) to achieve the rated 50°C/W R_thJA. Without proper thermal land design, junction temperature can exceed 150°C even at 7 A continuous current.

Does STS11NF30L have avalanche energy rating?

Yes - STS11NF30L is fully rated for unclamped inductive switching (UIS) with guaranteed single-pulse avalanche energy (E_AS) at T_j = 150°C. The datasheet specifies operation under UIS test conditions (Figure 1), confirming ruggedness for transient overloads in DC/DC converters without external protection.