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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

STMicroelectronics STL45P3LLH6

Name: STL45P3LLH6
Brand: STMicroelectronics
SKU: STL45P3LLH6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STL45P3LLH6

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: 8-PowerVDFN

Datasheet:: STL45P3LLH6.pdf

Description:: MOSFET P-CH 30V 45A POWERFLAT

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STL45P3LLH6 from STMicroelectronics is a P-channel enhancement-mode Power MOSFET using STripFET™ H6 trench-gate technology, rated for -30 V V_DS, 11 mΩ typ. R_DS(on) at V_GS = -10 V, and -45 A continuous drain current at T_C = 25 °C; used as a high-efficiency synchronous rectifier or load switch in DC-DC converters.

For engineers reviewing the STL45P3LLH6 datasheet, STL45P3LLH6 pinout, STL45P3LLH6 application, or STL45P3LLH6 equivalent, key selection criteria include verified R_DS(on) at -4.5 V gate drive, pulsed current capability (-180 A), thermal resistance (R_thj-case = 2.00 °C/W), and PowerFLAT™ 5x6 package compatibility with high-density PCB layouts.

Technical Context

This device implements a single P-channel silicon MOSFET with trench-gate structure optimized for low conduction and switching losses. Its gate threshold voltage (V_GS(th)) is -1 V typ., enabling logic-level drive from 3.3 V or 5 V controllers, and its reverse transfer capacitance (C_rss) is 235 pF, supporting fast turn-off in high-frequency switching.

The integrated source-drain diode exhibits V_SD = -1.1 V at -6 A and t_rr = 20 ns at 150 °C, making it suitable for synchronous rectification where body diode recovery speed impacts efficiency.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	-30 V maximum drain-source blocking voltage - supports 24 V automotive and industrial bus systems with margin.
R_DS(on) @ V_GS = -10 V	11 mΩ typical - enables <1 W conduction loss at -45 A, critical for thermally constrained power stages.
R_DS(on) @ V_GS = -4.5 V	16–19.5 mΩ - ensures usable on-resistance with standard 3.3 V GPIO or low-voltage gate drivers.
Q_g	24 nC total gate charge - reduces gate driver power loss and allows higher PWM frequencies up to ~1 MHz.
t_rr	20 ns reverse recovery time at 150 °C - minimizes shoot-through risk and improves efficiency in synchronous buck topologies.
R_thj-case	2.00 °C/W - enables direct heatsinking via exposed drain pad, supporting >70 W power dissipation with modest thermal interface.
I_DM	-180 A pulsed drain current - sustains short-circuit events in motor drives and hot-swap circuits without failure.

Pinout & Package

STL45P3LLH6 uses the PowerFLAT™ 5x6 package - a surface-mount, thermally enhanced, leadless package with an exposed drain pad on the bottom side for efficient heat transfer to the PCB. The package has 5 terminals: Drain (D), Source (S), Gate (G), and two Source-connected thermal pads (S1, S2) tied internally to the source metallization.

Pin/Terminal	Circuit Role	Design Meaning
D (Drain)	Main high-side current path terminal	Exposed copper pad on bottom - must be soldered to large PCB copper area for thermal and electrical connection.
S (Source)	Reference node for gate control and current return	Connected to three top-side pins (pins 1, 2, 5) and internal thermal pads - provides low-inductance source loop.
G (Gate)	Control electrode for channel modulation	Single top-side pin (pin 3) - requires <24 nC charge for full enhancement; sensitive to ESD.
S1, S2	Additional source connections	Integrated thermal pads under package corners - enhance thermal conduction and reduce source inductance in high-dI/dt applications.

Key Features

Feature	Design Value
Very low R_DS(on) at -4.5 V	16–19.5 mΩ - enables direct drive from microcontroller GPIOs without level-shifting, reducing BOM count.
Low gate charge (Q_g = 24 nC)	Reduces gate driver power consumption by >40% vs legacy P-channel MOSFETs, extending battery life in portable systems.
High avalanche ruggedness	Rated for repetitive unclamped inductive switching - eliminates need for external snubbers in relay/motor drive circuits.
PowerFLAT™ 5x6 thermal performance	R_thj-pcb = 31.3 °C/W on 1 in² FR-4 - delivers 4.8 W continuous power without heatsink, ideal for space-constrained modules.

Applications

Automotive Body Control Module (BCM)

Industrial 24 V DC-DC Converter

Use Scenario: High-side load switching for LED headlamps and solenoid valves in 12/24 V vehicle systems.

IC Role / Device Role / Timing Role: P-channel high-side switch controlling load current with fast turn-on/off (<100 ns) and low static loss.

Use Value: Eliminates need for high-side N-channel + charge pump; R_DS(on) ≤19.5 mΩ at -4.5 V ensures <0.5 W loss at 3 A load.

Use Scenario: Synchronous rectifier in isolated flyback or forward converter output stage.

IC Role / Device Role / Timing Role: Low-loss freewheeling path replacing Schottky diode, driven by transformer-coupled gate signal.

Use Value: t_rr = 20 ns and V_SD = -1.1 V reduce reverse recovery loss and improve efficiency by ≥2% over 40 V Schottky.

Hot-Swap Controller Protection

USB-C Power Delivery Load Switch

Use Scenario: Inrush current limiting and fault isolation in server backplane power rails.

IC Role / Device Role / Timing Role: Controlled high-side switch with fast turn-off (<70 ns td(off)) during overcurrent events.

Use Value: I_DM = -180 A and avalanche-rated SOA allow safe interruption of 50 A faults without destruction.

Use Scenario: Bidirectional 20 V/3 A power path control in USB-C PD sink applications.

IC Role / Device Role / Timing Role: Reverse-polarity protected load switch with low R_DS(on) and minimal voltage drop.

Use Value: R_DS(on) = 11 mΩ at -10 V ensures <330 mV drop at 3 A, meeting USB-C PD 3.0 voltage regulation limits.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF4905PbF	R_DS(on) = 20 mΩ @ -10 V; Q_g = 110 nC; TO-220 package	Higher thermal resistance (R_thj-case = 2.5 °C/W); larger footprint; no logic-level drive capability	Prefer when through-hole mounting or higher pulse current (>200 A) is required; avoid in high-frequency or space-constrained designs.
Si7157DP	R_DS(on) = 12.5 mΩ @ -4.5 V; Q_g = 22 nC; PowerPAK® SO-8 package	Lower max V_DS (-20 V); smaller thermal pad area; R_thj-pcb = 45 °C/W	Prefer for 12 V systems requiring tighter gate drive margin; avoid in 24 V industrial environments due to lower voltage rating.

Compared with IRF4905PbF and Si7157DP, STL45P3LLH6 uniquely balances -30 V rating, sub-20 mΩ R_DS(on) at -4.5 V, and PowerFLAT™ 5x6 thermal performance-making it optimal for compact, high-efficiency 24 V synchronous rectifiers and hot-swap switches.

Availability

STL45P3LLH6 is available at Aetrix Electronics and suitable for automotive body control modules, industrial 24 V DC-DC converters, hot-swap controller protection, and USB-C Power Delivery load switches requiring stable component supply across production lifecycles.

Supply support for STL45P3LLH6 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

This device belongs to ST's STripFET™ H6 Power MOSFET product line, engineered specifically for high-efficiency, high-current switching in space-constrained power supplies and motor control systems.

FAQ

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

The STL45P3LLH6 supports -34 A continuous drain current when the case temperature (T_C) is maintained at 100 °C, as defined by its R_thj-case = 2.00 °C/W thermal resistance and 150 °C maximum junction temperature. This rating assumes adequate PCB copper area and thermal vias beneath the exposed drain pad.

Can STL45P3LLH6 be driven directly by a 3.3 V microcontroller GPIO?

Yes - with V_GS(th) = -1 V typ. and R_DS(on) = 16–19.5 mΩ at V_GS = -4.5 V, the device achieves usable on-resistance when driven from a 3.3 V GPIO (via level-shifter or open-drain configuration with pull-up to -4.5 V). Full enhancement requires ≥-4.5 V, so direct 3.3 V drive yields partial conduction.

Is the PowerFLAT™ 5x6 package RoHS-compliant and halogen-free?

Yes - STL45P3LLH6 is offered in ECOPACK®2-compliant PowerFLAT™ 5x6 packaging, meeting RoHS Directive 2011/65/EU and halogen-free requirements per IEC 61249-2-21. The device carries the "E2" ECOPACK® grade designation, indicating full environmental compliance including lead-free terminations and green molding compound.

Does STL45P3LLH6 include integrated ESD protection on the gate?

No - the device does not integrate gate ESD protection diodes. Its gate-body leakage current (I_GSS) is ±100 nA at ±20 V, confirming absence of internal clamping. External gate protection (e.g., 10 kΩ series resistor + 12 V Zener to source) is recommended in automated handling or noisy environments to prevent damage from >±20 V transients.

STL45P3LLH6 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™ H6

Package/Case:: 8-PowerVDFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: P-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 45A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 13mOhm @ 6A, 10V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 24 nC @ 4.5 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 2615 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 4.8W (Ta), 75W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerFlat™ (5x6)

STL45P3LLH6 FAQ

1.How can I place an order for STL45P3LLH6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STL45P3LLH6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STL45P3LLH6 reliable?

The price and inventory of STL45P3LLH6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STL45P3LLH6 is usually 5 days.

3.What payment methods are accepted for STL45P3LLH6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STL45P3LLH6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STL45P3LLH6?

STL45P3LLH6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STL45P3LLH6 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STL45P3LLH6?

For technical support, including STL45P3LLH6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STL45P3LLH6 requirements.

6.How does Aetrix verify that STL45P3LLH6 is sourced from the original manufacturer or authorized distributors?

All STL45P3LLH6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STL45P3LLH6 meets industry standards.

7.What is the process for return or replacement of STL45P3LLH6?

All STL45P3LLH6 units undergo pre-shipment inspection (PSI). If there is an issue with STL45P3LLH6, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STL45P3LLH6 part is unused and in its original packaging.

Return procedure for STL45P3LLH6:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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