Diodes Incorporated DGD05791UFN-7

Overview

DGD05791UFN-7 from Diodes Incorporated is a high-frequency dual-channel gate driver IC for N-channel MOSFET half-bridge topologies, featuring 100V floating high-side capability, 1.5A source / 2.5A sink output current, 60ns typical propagation delay, and operation from -40°C to +125°C in U-DFN3030-10. It enables compact DC-DC converters and Class-D amplifiers by supporting fast switching with matched timing.

For engineers reviewing the DGD05791UFN-7 datasheet, DGD05791UFN-7 pinout, DGD05791UFN-7 application, or DGD05791UFN-7 equivalent, key selection criteria include bootstrap-compatible 100V high-side drive, TTL/CMOS logic compatibility down to 3.3V, independent UVLO on both sides, cross-conduction prevention, and <10ns delay matching for high-frequency synchronous rectification.

Technical Context

The DGD05791UFN-7 integrates independent high-side and low-side drivers with dedicated bootstrap supply (VB/VS) and fixed logic supply (VCC/COM) rails. Its logic inputs (HIN, LIN, EN) accept 3.3V–5V CMOS/TTL levels and feature input hysteresis (0.7V) for noise immunity.

UVLO thresholds are separately set for VCC (4.0–6.7V turn-on) and VB (3.8–5.8V turn-on), ensuring MOSFET protection during supply brownout. Propagation delays (tON = 65ns, tOFF = 58ns) and delay matching (≤10ns) are specified at CL = 1nF and VS = 100V, enabling reliable >1MHz switching in hard-switched topologies.

Key Specifications

Pinout & Package

Package: U-DFN3030-10 (3.0mm × 3.0mm × 0.6mm, 10-terminal, exposed thermal pad). Molded green compound, matte tin terminals, JEDEC Level 3 moisture sensitivity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge gate driver applications.

Compared with IRS2005STRPBF and LM5113MMX/NOPB, the DGD05791UFN-7 delivers superior high-frequency performance (60ns delay vs. ≥120ns), tighter timing matching (≤10ns vs. ≥25ns), and integrated safety features (dual UVLO, hardware dead-time), making it optimal for compact, high-efficiency DC-DC and audio amplifier designs.

Availability

DGD05791UFN-7 is available at Aetrix Electronics and suitable for DC-DC converters, motor controls, and Class-D power amplifiers requiring stable component supply, extended temperature operation, and high-speed gate drive precision.

Supply support for DGD05791UFN-7 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 power management, signal integrity, and connectivity solutions for industrial, computing, and consumer markets.

The DGD05791U belongs to Diodes' high-frequency gate driver product line, engineered specifically for efficient, space-constrained half-bridge power stages in battery-powered and high-density power conversion systems.

FAQ

What is the maximum allowable dVS/dt for the DGD05791UFN-7?

The DGD05791UFN-7 specifies a maximum offset supply transient rate of 50 V/ns on the VS node. This limit ensures reliable level-shifting operation of the high-side driver under fast-switching conditions. Exceeding this rate may cause false triggering or latch-up; layout best practices include minimizing high-di/dt loop area and using low-inductance bootstrap paths.

Can the DGD05791UFN-7 drive P-channel high-side MOSFETs?

No - the DGD05791UFN-7 is designed exclusively for N-channel MOSFETs in high-side/low-side configurations. Its high-side driver uses a floating bootstrap architecture that sources current into the gate, which is incompatible with P-channel devices requiring gate voltage below the source. For P-channel high-side drive, a dedicated high-side driver with inverting logic or level-shifting architecture is required.

Is the NC pin (Pin 2) required to be grounded or left floating?

Pin 2 is a true no-connect (NC) with no internal bond wire or silicon connection. It must remain unconnected on the PCB - neither grounded nor tied to any net. Soldering or routing to this pin risks mechanical stress on the package or unintended coupling; Diodes' recommended layout shows it as an isolated copper clearance zone.

Does the DGD05791UFN-7 support 3.3V-only operation without VCC ≥ 5V?

Yes - the logic inputs (HIN, LIN, EN) operate down to 3.3V, and VCC can be supplied at 6.5V minimum per recommended conditions. However, VCC must be ≥6.5V to ensure proper driver output swing and UVLO margin; the 3.3V compatibility applies only to input logic thresholds, not supply voltage. For 3.3V system-level control, use a separate 12V VCC rail with level-shifted inputs.