Diodes Incorporated DMP31D7L-13

Overview

DMP31D7L-13 from Diodes Incorporated is a P-channel enhancement-mode MOSFET in SOT23 package, rated for -30V V_DSS, 0.9Ω R_DS(ON) @ V_GS = -10V, and -0.58A continuous drain current at +25°C - optimized for low-loss power switching in compact DC-DC converters.

For engineers reviewing the DMP31D7L-13 datasheet, DMP31D7L-13 pinout, DMP31D7L-13 application, or DMP31D7L-13 equivalent, key selection criteria include gate threshold voltage (-1 to -2.6V), low input capacitance (19pF C_iss), fast switching times (t_D(ON) = 30ns), ESD-protected gate, and thermal resistance (290°C/W R_θJA) on standard FR-4 PCBs.

Technical Context

This MOSFET operates as a high-side load switch or synchronous rectifier in buck converters, leveraging its negative gate threshold and low R_DS(ON) to minimize conduction loss at low-to-moderate currents. Its body diode exhibits V_SD = -0.8 to -1.2V at -0.23A, supporting freewheeling in discontinuous conduction mode.

The device uses planar trench-gate technology to balance low on-resistance with controlled gate charge (Q_g = 0.36nC) and low Crss (3pF), enabling stable operation under PWM control with minimal Miller-induced shoot-through risk in half-bridge configurations.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic package with 3 terminals, 0.009g mass, UL 94V-0 rated molding compound, matte tin annealed finish over copper leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMG3415L-7 and AO3401, DMP31D7L-13 offers balanced trade-offs: moderate R_DS(ON) at -4.5V (1.7Ω), low C_iss (19pF), and tight thermal resistance (290°C/W), making it optimal for space-constrained, medium-frequency (<2MHz), low-power (<0.5A) switching where gate drive simplicity and EMI control are critical.

Availability

DMP31D7L-13 is available at Aetrix Electronics and suitable for DC-DC converters, power management functions, and battery-powered load switching requiring stable component supply across industrial, medical, and consumer electronics programs.

Supply support for DMP31D7L-13 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 DMP31D7L belongs to Diodes' high-efficiency power MOSFET product line, engineered specifically for compact, low-voltage DC-DC conversion and intelligent power distribution in space- and thermal-constrained applications.

FAQ

What is the maximum safe operating junction temperature for DMP31D7L-13?

The absolute maximum junction temperature is +150°C, verified per JEDEC JESD22-A108. Operation at this limit requires strict thermal design: 290°C/W R_θJA on standard FR-4 implies ≤0.43W power dissipation at +25°C ambient. Derating curves in Figure 12 confirm single-pulse SOA extends to 2.5A at 10μs, but continuous use above 125°C requires board-level copper area enhancement.

Can DMP31D7L-13 be used as a replacement for an N-channel MOSFET in high-side switching?

No - DMP31D7L-13 is a P-channel device designed for high-side switching without level-shifting circuitry, unlike N-channel MOSFETs which require gate voltage above the source. Its -30V V_DSS and -2.6V V_GS(TH) enable direct logic-level control from 3.3V/5V sources, whereas an N-channel would need ≥10V gate drive relative to drain potential in high-side configuration.

Does DMP31D7L-13 have built-in protection against gate overvoltage?

Yes - the device features ESD-protected gate structure rated to ±2kV HBM, and absolute maximum V_GS is ±20V. However, no internal Zener clamping or active gate protection is present; external gate resistors (≥10Ω) and TVS diodes are recommended for robustness in noisy environments or hot-swap applications per Diodes' AN-4000 application note.

How does the body diode performance affect its use in synchronous rectification?

The integrated body diode has V_SD = -0.8 to -1.2V at -0.23A and reverse recovery time not specified (non-optimized for fast recovery). In synchronous rectification, it conducts only during dead-time intervals; its low forward voltage minimizes conduction loss, but slow recovery may cause minor ringing if not properly timed - best practice is to ensure gate drive timing avoids simultaneous conduction with primary-side switch.