Diodes Incorporated DLS3035FGBQ-7A

Overview

DLS3035FGBQ-7A from Diodes Incorporated is a single-channel AEC-Q100 qualified automotive smart low-side load switch integrating a 30V N-channel MOSFET with 8 mΩ typical R_ON, short-circuit hiccup protection, thermal shutdown, and active-low open-drain fault signaling. It operates from 3.0–5.5V V_CC and supports up to 24V input voltage, targeting USB charging port short-to-V_BAT protection in vehicle infotainment and body control modules.

For engineers reviewing the DLS3035FGBQ-7A datasheet, DLS3035FGBQ-7A pinout, DLS3035FGBQ-7A application, or DLS3035FGBQ-7A equivalent, key selection criteria include ultra-low standby current (≤1 µA), fault reporting latency (<100 µs turn-on), thermal shutdown threshold (150°C), and V-DFN3030-12 (Type B) package compatibility with high-density automotive PCB layouts.

Technical Context

The DLS3035FGBQ-7A implements integrated power path control via an internal gate driver that enables fast MOSFET switching (t_ON = 100 µs typ.) and precise overcurrent detection using a 265 mV short-circuit threshold at the IN pin. Its control logic includes UVLO (2.55 V) with 200 mV hysteresis and EN pull-down (1 MΩ) for reliable power sequencing.

Fault handling is implemented through an open-drain FaultB output that asserts low during thermal overload, short-circuit, or undervoltage events, while hiccup-mode recovery limits average fault current and prevents thermal runaway under sustained overload conditions.

Key Specifications

Pinout & Package

Package: V-DFN3030-12 (Type B), 3.0 mm × 3.0 mm × 0.8 mm body with exposed thermal pad (PGND pins 8–12 and PGNDS pin 7). Molded green compound, NiPdAu-plated copper leadframe, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side smart load switch applications.

Compared with TPS22992DRLR and STL3035FGBQ, the DLS3035FGBQ-7A uniquely combines AEC-Q100 Grade 1 qualification, hiccup-mode short-circuit recovery, and 8 mΩ R_ON in a 3×3 mm footprint-making it the only option qualified for production automotive USB port protection with zero manual intervention during faults.

Availability

DLS3035FGBQ-7A is available at Aetrix Electronics and suitable for automotive USB charging protection, infotainment domain switching, and body control module load management requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for DLS3035FGBQ-7A 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 power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.

The DLS3035 series belongs to Diodes' automotive-qualified smart load switch product line, designed specifically to replace mechanical fuses and discrete MOSFET+driver circuits in 12 V/24 V vehicle subsystems with integrated protection and diagnostics.

FAQ

What is the maximum continuous current rating for DLS3035FGBQ-7A?

The DLS3035FGBQ-7A is rated for 20 A peak pulsed current, but its continuous current capability depends on PCB thermal design. With 4-layer board, 2 oz copper, and full PGND pad thermal vias, it supports ≥8 A continuous at +85°C ambient. Derating to 5 A is recommended for +105°C operation in sealed enclosures.

Does DLS3035FGBQ-7A require an external current-sense resistor?

No. The device uses internal MOSFET R_DS(on) sensing for short-circuit detection and does not require an external sense resistor. The 265 mV short-circuit threshold is referenced to the IN pin voltage drop across the internal FET, enabling compact, low-cost implementation.

Can EN be left floating during system power-up?

No. EN has an internal 1 MΩ pull-down, but leaving it floating risks unintended turn-on due to noise coupling. Diodes recommends tying EN to GND via a 10 kΩ resistor or driving it actively from a microcontroller GPIO to ensure deterministic power sequencing and prevent inrush into unprepared loads.

Is the V-DFN3030-12 (Type B) package compatible with standard reflow profiles?

Yes. The package is qualified for IPC/JEDEC J-STD-020 moisture sensitivity level 1 and supports standard lead-free reflow profiles (peak 260°C, 60 sec max above 217°C). The NiPdAu finish ensures solderability per MIL-STD-202, Method 208, and the 0.3 mm pin pitch allows fine-pitch stencil printing with 5 mil apertures.