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IRLML6401TRPBF

P-ch MOSFET, -12V, -4.3A, 50mΩ@-4.5V, 10nC Qg, SOT-23, load switch/DC-DC

139501

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Manufacturer Part：

IRLML6401TRPBF

Package：

SOT-23 / Micro3 / TO-236AB (2.9 x 1.3 x 1.0 mm, 1.9mm pitch)

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Description

The IRLML6401TRPBF from Infineon Technologies (formerly International Rectifier) is a -12 V P-channel enhancement-mode HEXFET power MOSFET in a 3-pin SOT-23 (Micro3) package. Key specifications include -12 V drain-source voltage, -4.3 A continuous drain current, 50 mΩ maximum RDS(on) at VGS = -4.5 V, -0.55 V typical threshold voltage, 10 nC total gate charge, and 1.3 W power dissipation. The device uses trench MOSFET technology for ultra-low on-resistance. Operating temperature range is -55°C to +150°C (TJ). The TRPBF suffix denotes tape-and-reel, Pb-free, halogen-free packaging.

The IRLML6401 from Infineon (originally International Rectifier) is a P-channel power MOSFET in the industry-standard SOT-23 (Micro3) surface-mount package. The IRLML6401TRPBF is the tape-and-reel, Pb-free, halogen-free version. It is one of the most popular P-channel MOSFETs for low-voltage load switching applications, with extensive multi-source availability.

The -12 V drain-source rating and -4.3 A continuous current capability make it ideal for Li-ion battery-powered applications where a high-side P-channel switch is needed. The 50 mΩ maximum RDS(on) at VGS = -4.5 V results in only 215 mW of conduction loss at 4.3 A, well within the 1.3 W package rating with modest PCB copper area.

The low threshold voltage (VGS(th) = -0.55 V typical, -1.0 V maximum) allows the IRLML6401 to be driven directly from 1.8 V logic. At VGS = -2.5 V, RDS(on) increases to approximately 80-90 mΩ but remains usable for moderate current loads, making 1.8 V/2.5 V GPIO-driven load switches practical.

The 10 nC total gate charge enables switching frequencies up to several hundred kHz with minimal gate-drive loss, suitable for DC-DC converter applications where a P-channel high-side switch is preferred over a bootstrap-driven N-channel.

The SOT-23 package provides RθJA of approximately 75-100°C/W depending on PCB layout. With the large drain tab soldered to a copper pour with thermal vias, the device can handle its full rated current in continuous operation.

Note: Infineon has designated the IRLML6401TRPBF-1 as discontinued (replaced by IRLML6401TRPBF). However, the device remains widely available from distributors with over 139K units in stock at Farnell alone. Multiple second-source manufacturers (VBsemi, Kexin, Born) produce compatible versions.

**P-Channel Enhancement MOSFET:** The IRLML6401 is a P-channel enhancement-mode MOSFET. Current flows from source to drain when the gate-source voltage is negative (VGS 0.6 V. This diode is relevant in half-bridge and synchronous rectifier applications where it conducts during dead time.

Pin Name Type Description
1 Gate I Gate input; controls channel formation; VGS(th) = -0.55V typ; VGS max ±8V; 10nC gate charge; ESD protected; drive from MCU GPIO through series resistor
2 Source P Source terminal; typically connected to VCC rail (high-side switch); current flows from source to drain when on; body diode anode
3 Drain O Drain terminal; connects to load; -4.3A continuous; -12V max VDS; body diode cathode; large tab for thermal dissipation on PCB
Application Description
High-Side Load Switch P-channel as high-side switch between battery and load; MCU GPIO drives gate through resistor; source to battery, drain to load; no charge pump needed; 50mΩ at -4.5V gives <50mV drop at 1A; suitable for 3.3V/5V subsystem power control
Battery Protection / Reverse Polarity Prevent reverse battery connection; P-channel in series with battery; gate tied through Zener to source; conducts only when battery polarity correct; -12V rating covers single-cell Li-ion
DC-DC Converter High-Side Switch P-channel high-side in async buck or inverting buck-boost; 10nC Qg supports 200-500kHz switching; gate driven from controller output; use when bootstrap N-channel drive is impractical
Model Manufacturer Compatibility Key Difference
IRLML6402TRPBF Infineon Series Variant (20V) -20V VDS; -3.6A ID; 65mΩ@-4.5V; same SOT-23; higher voltage rating; lower current; use for 12V bus applications
SI2301DS-T1-GE3 Vishay Functional Equivalent -20V P-ch; -2.2A; 90mΩ@-4.5V; SOT-23; Vishay-sourced alternative; higher voltage rating
AO3401A Alpha & Omega Competitive Upgrade -30V P-ch; -4.3A; 36mΩ@-4.5V; SOT-23; lower RDS(on); higher voltage; use for improved efficiency
DMG2305UX-13 Diodes Inc Competitive Alternative -20V P-ch; -4.2A; 48mΩ@-4.5V; SOT-23; similar specs; Diodes Inc-sourced alternative
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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