Diodes Incorporated DMP68D0LFB-7B

Overview

DMP68D0LFB-7B from Diodes Incorporated is a 65V P-channel enhancement-mode MOSFET in a 1.0 mm × 0.6 mm X1-DFN1006-3 package, rated for -318 mA continuous drain current at V_GS = -5 V and featuring R_DS(ON) = 8 Ω (max) under that condition. It serves as a low-power load switch or driver in compact DC-DC converters, battery-operated systems, and solid-state relay circuits.

For engineers reviewing the DMP68D0LFB-7B datasheet, DMP68D0LFB-7B pinout, DMP68D0LFB-7B application, or DMP68D0LFB-7B equivalent, key selection criteria include its low gate threshold voltage (-0.8 to -2.1 V), ultra-small footprint, low input capacitance (36 pF), fast switching times (t_D(ON) = 12.2 ns), and thermal resistance of 103 °C/W with thermal vias - all critical for space-constrained, thermally sensitive power management designs.

Technical Context

This P-channel MOSFET operates in enhancement mode with a negative gate threshold (V_GS(TH) = -0.8 to -2.1 V), enabling direct logic-level control from 3.3 V or 5 V microcontrollers when referenced to the source. Its low R_DS(ON) at low |V_GS| supports efficient operation in always-on or low-duty-cycle biasing schemes.

The device integrates a body diode with V_SD = -0.8 to -1.5 V at -100 mA and exhibits low dynamic parameters: C_iss = 36 pF, Q_g = 4.1 nC, and t_F = 18.9 ns - confirming suitability for high-frequency switching in portable power rails and discrete gate driving.

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 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMN68D8LFD-7 and AO3401, DMP68D0LFB-7B offers the smallest footprint and lowest thermal resistance (103 °C/W) among these three, making it optimal for miniaturized, thermally constrained battery systems - though with lower current capacity than DMN68D8LFD-7 and faster switching than AO3401.

Availability

DMP68D0LFB-7B is available at Aetrix Electronics and suitable for battery-operated systems, DC-DC converter bias control, and solid-state relay replacement requiring stable component supply and consistent lead-free manufacturing.

Supply support for DMP68D0LFB-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 the Americas.

This device belongs to Diodes' X1-DFN low-voltage power MOSFET product line, engineered specifically for space-constrained, low-power portable electronics requiring high reliability and RoHS-compliant packaging.

FAQ

What is the maximum safe operating junction temperature for DMP68D0LFB-7B?

The absolute maximum junction temperature is +150 °C, as specified in the Absolute Maximum Ratings table. Operation above this limit risks permanent parametric shift or failure. Derating is required above +125 °C ambient, especially when dissipating >0.6 W without thermal vias.

Can DMP68D0LFB-7B be driven directly from a 3.3 V microcontroller GPIO?

Yes - its gate threshold voltage range (-0.8 to -2.1 V) allows full enhancement with a 3.3 V GPIO pulled low (i.e., V_GS ≈ -3.3 V), delivering R_DS(ON) well below 8 Ω. No level shifter is needed for logic-compatible turn-on.

Is the body diode suitable for reverse-polarity protection?

No - the body diode conducts from source to drain (anode at drain, cathode at source), so it does not block reverse input voltage. For reverse-polarity protection, the MOSFET must be placed in series with the positive rail in high-side configuration, relying on channel conduction only when properly biased.

What is the recommended PCB layout for thermal performance?

Use the manufacturer's suggested pad layout for X1-DFN1006-3, including thermal vias (minimum 4×0.3 mm diameter) connecting the exposed drain pad to an internal or bottom-layer 1-inch square copper pour. This achieves the 103 °C/W R_θJA rating cited in Note 6.