Diodes Incorporated DMPH4029LFG-7

Overview

DMPH4029LFG-7 from Diodes Incorporated is a P-channel enhancement-mode MOSFET in PowerDI3333-8 package, rated for -40V V_DSS, 29 mΩ R_DS(ON) @ V_GS = -10V, -8.0 A continuous drain current at T_A = +25°C, and operation up to +175°C junction temperature-used in DC-DC converter high-side switches and backlight LED current control.

For engineers reviewing the DMPH4029LFG-7 datasheet, DMPH4029LFG-7 pinout, DMPH4029LFG-7 application, or DMPH4029LFG-7 equivalent, key selection criteria include R_DS(ON) at low gate drive (-4.5V), thermal resistance (R_θJA = 54°C/W with thermal pad), AEC-Q101 qualification status, and PowerDI3333-8 footprint compatibility with space-constrained power stages.

Technical Context

This MOSFET employs trench-gate silicon process optimized for low on-resistance while maintaining fast switching speed: t_D(ON) = 3.9 ns and t_D(OFF) = 83 ns at V_GS = -10V, enabling efficient synchronous buck and load-switch topologies. Its body diode exhibits t_RR = 17.3 ns and Q_RR = 7.2 nC under IF = -3A, di/dt = 100 A/μs-critical for minimizing shoot-through loss in bidirectional power paths.

The device's gate threshold voltage V_GS(TH) ranges from -1.0 V to -3.0 V, ensuring reliable turn-on with standard logic-level controllers. R_DS(ON) remains stable across temperature: normalized drift <1.1× at T_J = 150°C (V_GS = -10V, I_D = -10A), supporting robust performance in automotive under-hood and industrial motor-drive environments.

Key Specifications

Pinout & Package

Package: PowerDI3333-8 - thermally enhanced 8-pin surface-mount package with exposed drain paddle, 3.3 mm × 3.3 mm footprint, 0.8 mm height, and UL 94V-0 molded compound. Optimized for bottom-side thermal transfer via soldered paddle.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMG1012T-7 and Si7157DP-T1-GE3, DMPH4029LFG-7 uniquely balances ultra-low R_DS(ON), AEC-Q101 compliance, and minimal footprint-making it optimal for space- and temperature-critical automotive power switches where SO-8 is prohibitive and PowerDI323 lacks current capability.

Availability

DMPH4029LFG-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC-DC converters, and LCD backlighting systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for DMPH4029LFG-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 high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.

DMPH4029LFG-7 belongs to Diodes' PowerMOS™ portfolio, engineered specifically for high-efficiency, high-temperature power switching in space-constrained automotive and industrial systems-emphasizing low R_DS(ON), robust thermal design, and AEC-Q101 validation.

FAQ

What is the maximum continuous drain current at 100°C ambient temperature?

At T_A = +100°C, the maximum continuous drain current is -4.2 A (derated from -8.0 A at 25°C using R_θJA = 54°C/W and T_J(max) = 175°C). This value assumes 2 oz copper with thermal pad per datasheet Note 6 and accounts for junction-to-ambient thermal path limitations.

Is DMPH4029LFG-7 pin-compatible with standard SO-8 P-channel MOSFETs?

No-DMPH4029LFG-7 uses PowerDI3333-8, an 8-pin leadless package with different pin mapping and thermal pad layout. It is not mechanically or electrically pin-compatible with SO-8. Layout redesign is required, but the 3.3 mm × 3.3 mm footprint saves ~67% board area versus SO-8.

Does this MOSFET require a gate resistor for stability in switching applications?

Yes-a gate resistor (typically 5–22 Ω) is recommended to dampen ringing caused by gate-drain capacitance (C_rss = 107 pF) and PCB inductance. The datasheet specifies R_G = 3 Ω for timing measurements; increasing R_G reduces EMI but extends t_D(OFF) and increases switching loss.

Can DMPH4029LFG-7 be used in linear regulation mode?

No-it is not characterized or rated for linear (ohmic) operation. The Safe Operating Area (SOA) curve (Figure 13) shows only pulse-limited operation below V_DS = 10 V at high current; sustained linear use risks thermal runaway due to positive R_DS(ON) temperature coefficient and limited power dissipation (2.8 W max).