Diodes Incorporated DMP68D1LFB-7B

Overview

DMP68D1LFB-7B from Diodes Incorporated is a 65V P-channel enhancement-mode MOSFET in a X1-DFN1006-3 package, optimized for low-R_DS(ON) and fast switching in space-constrained power management circuits. It delivers 8 Ω R_DS(ON) at V_GS = −5 V, −290 mA continuous drain current at +25°C, and 1.2 W power dissipation on FR-4 with thermal pad - used in battery-powered DC-DC converters and solid-state relay drivers.

For engineers reviewing the DMP68D1LFB-7B datasheet, DMP68D1LFB-7B pinout, DMP68D1LFB-7B application, or DMP68D1LFB-7B equivalent, key selection criteria include its −65 V V_DSS, low gate charge (0.6 nC), ESD protection, 100 °C/W thermal resistance on enhanced layout, and compatibility with low-voltage logic-level gate drive in portable power switches.

Technical Context

This MOSFET operates as a single P-channel switch with gate-controlled conduction between drain and source terminals. Its −2.1 V maximum V_GS(TH) enables turn-on with standard 3.3 V or 5 V logic, while the 6 pF Crss and 42 pF Ciss support high-frequency PWM operation up to several MHz in buck regulators.

The device integrates an intrinsic body diode with −0.8 V typical V_SD at −100 mA, supporting synchronous rectification and reverse-current blocking. Its 180 °C/W R_θJA on minimal pad layout and 100 °C/W on 1-inch² copper plate define thermal design boundaries for continuous and pulsed load conditions.

Key Specifications

Pinout & Package

Package: X1-DFN1006-3 - 1.0 mm × 0.6 mm, 3-terminal leadless plastic package with NiPdAu-plated terminals, moisture sensitivity level 1, UL 94V-0 rated.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel MOSFET switching applications.

Compared with DMN68D8LW-7 and AO3401, DMP68D1LFB-7B uniquely combines −65 V rating, ultra-small footprint, and logic-level P-channel operation - enabling high-side switching in space-limited 48 V systems without external level shifters or driver ICs.

Availability

DMP68D1LFB-7B is available at Aetrix Electronics and suitable for battery-operated systems, DC-DC converters, and solid-state relay drivers requiring stable component supply and long-term lifecycle support.

Supply support for DMP68D1LFB-7B 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The DMP68D1LFB-7B belongs to Diodes' logic-level P-channel MOSFET product line, engineered specifically for high-efficiency, low-power switching in portable and space-constrained applications where voltage headroom and thermal performance are critical.

FAQ

What is the maximum safe operating junction temperature for DMP68D1LFB-7B?

The absolute maximum junction temperature is +150°C, as specified in the Absolute Maximum Ratings table. Operation above this limit risks permanent parametric degradation or catastrophic failure. Derating curves in Figure 7 show R_DS(ON) increases by ~2× from −55°C to +150°C, requiring thermal design to maintain T_J ≤125°C for reliability-critical applications.

Can DMP68D1LFB-7B be used in high-side switch configurations with 3.3 V microcontroller GPIO?

Yes - its −0.8 V minimum V_GS(TH) and −2.1 V maximum ensure full enhancement with 0 V gate (3.3 V source), delivering ≤8 Ω R_DS(ON) at V_GS = −3.3 V. No level shifter is needed, though layout must minimize gate loop inductance to prevent ringing during fast transitions.

Does DMP68D1LFB-7B require external ESD protection in handheld device designs?

No - it integrates HBM-class ESD protection per JEDEC JS-001, rated to ±2 kV on all pins. This eliminates the need for external TVS diodes in typical I/O interface applications, provided board-level handling follows ESD-safe practices and no sustained overvoltage exceeds V_GSS = ±20 V.

How does thermal performance differ between the two power dissipation ratings (0.7 W vs. 1.2 W)?

The 0.7 W rating applies to standard FR-4 with minimum recommended pad layout (R_θJA = 180°C/W); the 1.2 W rating assumes a 1-inch² copper thermal pad (R_θJA = 100°C/W). Real-world dissipation must be derated linearly above +25°C ambient using the respective R_θJA value and measured board thermal impedance.