Diodes Incorporated DGD0579UFNQ-7

Overview

DGD0579UFNQ from Diodes Incorporated is a high-frequency dual-channel gate driver IC for half-bridge N-MOSFET topologies, featuring 100V floating high-side capability, 1.5A source / 2.5A sink output current, 60ns typical propagation delay, and integrated bootstrap diode - deployed in automotive-grade DC-DC converters and Class D amplifiers.

For engineers reviewing the DGD0579UFNQ datasheet, DGD0579UFNQ pinout, DGD0579UFNQ application, or DGD0579UFNQ equivalent, key selection criteria include bootstrap-diode-integrated U-DFN3030-10 footprint, AEC-Q100 qualification, matched HO/LO timing (≤10ns skew), dual UVLO protection, and 3.3V logic compatibility with HIN/LIN/EN inputs.

Technical Context

The DGD0579UFNQ implements independent high-side and low-side drivers with separate supply rails (VB/VS for high-side, VCC/COM for low-side) and cross-conduction prevention logic that enforces dead-time between HO and LO transitions. Its internal bootstrap diode eliminates external component count while supporting up to 100V offset voltage at VS.

UVLO thresholds are independently set for VB (4.9V typ.) and VCC (5.2V typ.), ensuring MOSFET gate drive remains disabled during insufficient supply conditions. Propagation delays are tightly matched (≤10ns max difference), enabling reliable operation at switching frequencies beyond 1 MHz in compact power stages.

Key Specifications

Pinout & Package

Package: U-DFN3030-10 (3.0mm × 3.0mm × 0.6mm, 10-terminal, exposed thermal pad). Molded green compound, NiPdAu-plated terminals, MSL Level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side/low-side gate driver applications.

Compared with IRS2005STRPBF and LM5109BMAX/NOPB, the DGD0579UFNQ uniquely combines AEC-Q100 qualification, integrated bootstrap diode, U-DFN3030-10 miniaturization, and 3.3V logic compatibility - making it optimal for space- and reliability-constrained automotive and portable power applications.

Availability

DGD0579UFNQ is available at Aetrix Electronics and suitable for DC-DC converters, motor controls, and Class D power amplifiers requiring stable component supply, automotive qualification, and compact high-frequency gate drive performance.

Supply support for DGD0579UFNQ 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-performance power management, signal integrity, and precision timing solutions.

The DGD0579UFNQ belongs to Diodes' automotive-qualified gate driver product line, engineered specifically for robust, space-efficient half-bridge control in electrified vehicle subsystems and portable industrial equipment.

FAQ

What is the maximum allowable dVS/dt for the DGD0579UFNQ high-side section?

The DGD0579UFNQ specifies a maximum dVS/dt rating of 50 V/ns at the VS pin. This limit ensures reliable operation during fast-switching events in high-frequency half-bridge topologies. Exceeding this rate may cause false triggering or latch-up. Layout best practices-such as minimizing loop inductance and using tight gate-loop routing-are essential to stay within this specification under real-world switching conditions.

Does the DGD0579UFNQ require an external bootstrap capacitor, and what value is recommended?

Yes, an external bootstrap capacitor is required between VB and VS pins. Diodes recommends a 0.1 µF X7R ceramic capacitor placed as close as possible to those pins. The capacitor must withstand the full VB–VS voltage swing and provide sufficient charge for high-side drive during continuous conduction. A series resistor (typically 1–10 Ω) may be added to damp ringing, but is not mandatory per the datasheet.

How does the EN pin behave during power-up, and is an external pull-up required?

The EN pin has an internal weak pull-down (typ. 100 kΩ), ensuring the driver remains disabled until a valid logic high (≥1.6V) is applied. No external pull-up is required for default disable behavior. However, in systems where deterministic startup is critical, a 10–100 kΩ external pull-up to VCC is recommended to override leakage effects and guarantee immediate enablement after VCC stabilization.

Can the DGD0579UFNQ drive both high-side and low-side MOSFETs with different gate thresholds or Qg values?

Yes - its 1.5A source / 2.5A sink capability and rail-to-rail output swing accommodate diverse N-MOSFETs. However, mismatched gate charge (Qg) between high-side and low-side devices may cause unequal rise/fall times, increasing shoot-through risk. For optimal performance, Diodes recommends pairing MOSFETs with closely matched Qg and threshold voltages, especially when operating above 300 kHz.