Diodes Incorporated DLS3035FGBQ-7

Overview

DLS3035FGBQ from Diodes Incorporated is a single-channel automotive-grade 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 reporting. It operates from 3.0–5.5V V_CC and supports up to 24V input voltage, delivering robust power domain control for USB charging port short-to-battery protection in automotive infotainment systems.

For engineers reviewing the DLS3035FGBQ datasheet, DLS3035FGBQ pinout, DLS3035FGBQ application, or DLS3035FGBQ equivalent, key selection criteria include its AEC-Q100 qualification, ultra-low standby current (≤1 µA), 12-pin V-DFN3030-12 package footprint, fault signaling behavior, and thermal protection threshold at 150°C.

Technical Context

The DLS3035FGBQ implements a digitally controlled low-side switching architecture with integrated gate drive, undervoltage lockout (UVLO at 2.55V), and adaptive short-circuit detection triggered at 180–350 mV across the MOSFET. Its control logic enables hiccup-mode recovery after fault events and maintains safe operation under ambient temperatures from –40°C to +125°C.

Thermal management is enforced via junction-to-case resistance of 4.5°C/W and automatic shutdown at 150°C with 30°C hysteresis. The device uses an internal NiPdAu-plated copper leadframe and meets IATF 16949 manufacturing standards for automotive reliability.

Key Specifications

Pinout & Package

Package: V-DFN3030-12 (Type B), 3.0 mm × 3.0 mm × 0.8 mm, exposed thermal pad (PGND pins 8–12), RoHS-compliant green molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NIS5132MN and TPS22919DNYR, the DLS3035FGBQ uniquely combines 24V input capability, hiccup-mode fault recovery, thermal shutdown, and AEC-Q100 qualification in a single 3×3 mm package-making it optimal for automotive power domain isolation where reliability and autonomy are mandatory.

Availability

DLS3035FGBQ is available at Aetrix Electronics and suitable for automotive USB charging protection, infotainment power sequencing, and ADAS camera module control requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for DLS3035FGBQ 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 DLS3035FGBQ belongs to Diodes' automotive-qualified smart load switch product line, designed specifically for robust, space-efficient power domain control in harsh automotive environments with integrated fault management.

FAQ

What is the maximum continuous current rating for DLS3035FGBQ?

The DLS3035FGBQ is rated for 20A peak current per Absolute Maximum Ratings, but continuous current depends on PCB thermal design. With 4-layer board, 2 oz copper, and full PGND thermal pad soldering, it supports ≥8A continuous at +85°C ambient. Derating curves in Figure 7 of DS42486 confirm 6A at +105°C ambient with standard layout.

Does DLS3035FGBQ require an external current-sense resistor?

No. The device uses internal MOSFET R_ON sensing for short-circuit detection - no external resistor needed. Voltage across the MOSFET (IN-to-PGND) is monitored internally; fault triggers when sensed voltage exceeds 180–350 mV, corresponding to ~22.5–43.8A at 8 mΩ R_ON.

How does the FaultB pin behave during normal operation and fault conditions?

During normal operation, FaultB remains high-impedance (open-drain); an external pull-up is required. When thermal, short-circuit, or UVLO faults occur, FaultB pulls low actively. It stays low throughout hiccup cycles and returns high only after fault condition clears and internal timer expires (~10 ms).

Can DLS3035FGBQ be used in non-automotive applications?

Yes - its 30V rating, ultra-low standby current, and hiccup protection make it suitable for industrial PLC I/O modules, medical portable devices, and telecom power sequencing. However, AEC-Q100 qualification, PPAP documentation, and IATF 16949 manufacturing are automotive-specific benefits not required outside that domain.