Diodes Incorporated DMP21D1UT-13

Overview

DMP21D1UT-13 from Diodes Incorporated is a P-channel enhancement-mode MOSFET in SOT523 package, rated for -20V V_DSS, 710mΩ R_DS(ON) at V_GS = -4.5V, and -0.63A continuous drain current at T_A = +25°C. It serves as a low-voltage load switch or synchronous rectifier in space-constrained DC-DC converters.

For engineers reviewing the DMP21D1UT-13 datasheet, DMP21D1UT-13 pinout, DMP21D1UT-13 application, or DMP21D1UT-13 equivalent, key selection criteria include gate threshold voltage (-0.5V to -1.0V), low input capacitance (33pF C_iss), fast switching (t_D(ON) = 4.6ns), ESD-protected gate, and thermal resistance (R_θJA = 480°C/W on FR-4).

Technical Context

This MOSFET employs planar trench-gate technology optimized for low R_DS(ON) at low gate drive voltages (down to -1.8V), enabling efficient operation in 3.3V and 2.5V logic-controlled power rails. Its body diode exhibits V_SD = -0.8V at -300mA, supporting bidirectional current handling in buck converter freewheeling paths.

The device features fully characterized dynamic parameters including Q_g = 1.4nC, Q_gd = 0.1nC, and Crss = 3pF - critical for minimizing Miller-induced shoot-through in high-frequency switching topologies. Thermal performance is validated under two PCB conditions: standard FR-4 (R_θJA = 480°C/W) and enhanced layout (R_θJA = 287°C/W).

Key Specifications

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic package (1.60 × 1.60 × 0.55 mm), rated for 0.26W steady-state power dissipation on standard FR-4 board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMN2011UFD-7 and AO3401, DMP21D1UT-13 delivers superior low-voltage switching performance in minimal footprint: its -0.5V V_GS(TH) and 710mΩ R_DS(ON) at -4.5V enable direct 3.3V GPIO control with lower conduction loss than either alternative in space-constrained portable designs.

Availability

DMP21D1UT-13 is available at Aetrix Electronics and suitable for USB power delivery modules, wearable sensor nodes, IoT battery protection circuits, and compact DC-DC converters requiring stable component supply and consistent SOT523 tape-and-reel delivery.

Supply support for DMP21D1UT-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, specializing in high-reliability power management, signal integrity, and connectivity solutions for industrial, computing, and consumer markets.

DMP21D1UT belongs to Diodes' "Ultra-Small Signal MOSFET" product line, engineered specifically for space-constrained, low-voltage power gating and load switching in portable and battery-powered electronics.

FAQ

What is the maximum junction temperature and thermal derating behavior of DMP21D1UT-13?

The DMP21D1UT-13 has a rated junction temperature range of -55°C to +150°C. Its R_DS(ON) increases by ~1.5× from 25°C to 125°C at V_GS = -4.5V, per Figure 6. Derating begins at T_A = +75°C, where continuous drain current drops from -0.63A to -0.51A due to thermal limits on the SOT523 package's 480°C/W R_θJA.

Does DMP21D1UT-13 require external gate protection in typical 3.3V GPIO applications?

No. The device integrates ESD protection on the gate terminal (HBM >2kV per datasheet), and its ±8V V_GSS rating exceeds standard 3.3V GPIO swing. With V_GS(TH) as low as -0.5V, it turns on fully using direct 3.3V logic high (V_GS = -3.3V), eliminating need for level shifters or external Zener clamps.

How does the body diode performance compare to discrete Schottky diodes in reverse polarity protection?

The integrated body diode has V_SD = -0.8V at -300mA and -1.2V at -1A, measured at T_J = 25°C. This is ~200mV higher than a typical 0402 Schottky (e.g., PMEG2005AE), but its ultra-low leakage (<1µA) and co-packaged integration eliminate board area and parasitic inductance - critical for EMI-sensitive wearables.

Can DMP21D1UT-13 be used in linear regulator pass transistor applications?

No. Its SOA curve (Figure 12) shows safe operation only up to V_DS = 2V at -0.4A in DC mode - insufficient for linear regulation across typical dropout ranges. It is optimized for switching operation (duty cycle <50%, pulse width ≤10ms), not linear biasing, due to limited thermal mass and R_θJA constraints.