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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

STMicroelectronics STPS1L20MF

Name: STPS1L20MF
Brand: STMicroelectronics
SKU: STPS1L20MF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS1L20MF

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: DO-222AA

Datasheet:: STPS1L20MF.pdf

Description:: DIODE SCHOTT 20V 1A STMITE FLAT

Quantity:: RFQ Add To RFQ list

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Inventory:8,788

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Product details

Overview

STPS1L20MF from STMicroelectronics is a single low-drop Schottky rectifier in STmite flat (DO-222-AA) package, rated for 1 A average forward current and 20 V repetitive peak reverse voltage, with typical forward voltage drop of 0.32–0.43 V at 1 A and 25 °C. It delivers negligible switching losses, extremely fast switching, and low thermal resistance (20 °C/W junction-to-case), making it ideal for battery-powered portable electronics including cellular handsets, notebooks, and PCMCIA cards.

For engineers reviewing the STPS1L20MF datasheet, STPS1L20MF pinout, STPS1L20MF application, or STPS1L20MF equivalent, key selection criteria include its 0.85 mm profile, avalanche-rated capability (1400 W at 1 µs), low R_th(j-c), and compatibility with standard STmite footprint-critical for space-constrained, high-efficiency DC/DC converters and polarity protection circuits.

Technical Context

The STPS1L20MF is a monolithic silicon Schottky barrier diode optimized for high-frequency switching applications. Its metal-semiconductor junction enables near-zero reverse recovery time and eliminates minority-carrier storage delay, resulting in negligible switching losses even above 1 MHz.

It operates up to 150 °C junction temperature with specified avalanche capability (1400 W, 1 µs pulse), and features low thermal resistance (20 °C/W j-c) due to direct die attachment to the exposed cathode pad in the STmite flat package-enabling efficient heat dissipation without external heatsinking in low-power portable designs.

Key Specifications

Parameter	Value and Actual Design Meaning
IF(AV)	1 A at Tc = 140 °C, δ = 0.5 - supports continuous output current in compact DC/DC converters without forced air cooling
VRRM	20 V - suitable for 12 V and lower input rails, including USB PD, battery charging, and logic-level power domains
VF (max)	0.37 V at IF = 1 A, Tj = 85 °C - reduces conduction loss to ~0.37 W, improving efficiency and extending battery runtime
Rth(j-c)	20 °C/W - enables direct PCB copper thermal path; 10 °C rise at 0.5 W allows operation in sealed enclosures
IFSM	50 A (10 ms sinusoidal) - withstands inrush currents during hot-plug events in portable chargers and adapters
dV/dt	10,000 V/µs - immune to rapid voltage transients in high-speed synchronous rectification topologies
Package	STmite flat (DO-222-AA), 0.85 mm height - fits under 1 mm board-to-board connectors and thin-profile battery compartments

Pinout & Package

STPS1L20MF uses a 2-terminal STmite flat (DO-222-AA) surface-mount package with an exposed cathode pad for thermal and electrical connection. The package has no internal leads; both terminals are formed by metallized die attach surfaces on the bottom side.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to input rail or switch node; requires minimal trace width due to low VF and absence of reverse recovery charge
Cathode (exposed pad)	Forward current exit / thermal interface	Serves as primary thermal path to PCB copper; must be soldered to ≥100 mm² FR4 copper area for rated Rth(j-a) = 250 °C/W

Key Features

Feature	Design Value
Very low profile (0.85 mm)	Enables integration into ultra-thin devices such as slim notebooks and foldable smartphones where Z-height is constrained
Negligible switching losses	Eliminates need for snubbers or gate drive optimization in >500 kHz DC/DC converters, reducing BOM count
Avalanche capability (1400 W, 1 µs)	Withstands transient overvoltage events in buck converter freewheeling paths without derating or external clamping
Backward-compatible STmite footprint	Allows drop-in replacement of legacy STPS1L20A/STPS1L20U without PCB redesign or stencil changes
Lead-free, RoHS-compliant	Meets IPC-J-STD-020 moisture sensitivity level 1 (MSL1), enabling standard reflow profiles without baking

Applications

Portable Battery Charging

USB Power Delivery Input Stage

Use Scenario: Reverse polarity and overvoltage protection in wall adapters and portable power banks feeding Li-ion cells.

IC Role / Device Role / Timing Role: Low-loss freewheeling and input rectification diode in synchronous buck or flyback secondary-side regulation.

Use Value: 0.37 V VF at 1 A reduces power loss by >40% vs. standard PN diodes, directly extending charge cycle duration.

Use Scenario: Input protection and voltage clamping in USB-C PD sink circuits operating up to 20 V.

IC Role / Device Role / Timing Role: Polarity guard and transient clamp between connector and controller IC, handling 50 A surge pulses.

Use Value: 50 A IFSM and 10,000 V/µs dV/dt rating prevent latch-up during hot-swap insertion and ESD events.

PCMCIA Card Power Switching

Low-Voltage Inverter Freewheeling

Use Scenario: Hot-swap power sequencing and isolation in legacy PCMCIA/ExpressCard peripherals.

IC Role / Device Role / Timing Role: Bidirectional blocking diode ensuring safe insertion/removal while maintaining 3.3 V/5 V bus integrity.

Use Value: 0.85 mm height clears card edge connectors; 20 V VRRM covers full PCMCIA voltage range with margin.

Use Scenario: Freewheeling path in 12 V input, 3.3 V output LLC resonant inverters for LED backlight drivers.

IC Role / Device Role / Timing Role: High-frequency return path for inductive current during MOSFET dead-time intervals.

Use Value: Near-zero reverse recovery eliminates shoot-through risk and EMI spikes, enabling >1 MHz operation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Diodes Inc. SB120	Same 20 V VRRM, 1 A IF(AV), but DO-214AA package (2.7 mm height); VF = 0.5 V @ 1 A, 25 °C	Larger footprint and higher VF increase conduction loss and limit use in <1 mm Z-height designs	Select when board space permits and thermal budget allows +0.13 V VF penalty
Vishay SS12	DO-214AC package (2.2 mm height); VF = 0.5 V @ 1 A, 25 °C; no specified avalanche rating	Lacks 1400 W avalanche capability and 0.85 mm profile-unsuitable for high-reliability portable surge environments	Prefer only for cost-sensitive, non-battery-critical industrial supplies with adequate board clearance

Compared with SB120 and SS12, STPS1L20MF uniquely combines sub-millimeter height, 0.37 V max VF, and guaranteed avalanche robustness-making it the only choice for space- and reliability-constrained battery-powered systems requiring zero-recovery switching.

Availability

STPS1L20MF is available at Aetrix Electronics and suitable for portable battery charging, USB power delivery input stages, PCMCIA card power switching, and low-voltage inverter freewheeling requiring stable component supply across high-mix, low-volume production runs.

Supply support for STPS1L20MF 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, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STPS1L20MF belongs to ST's STmite flat Schottky rectifier product line, engineered specifically for ultra-thin portable electronics where low profile, low VF, and high surge immunity are mandatory design requirements.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The STPS1L20MF has a maximum operating junction temperature of 150 °C, validated under conditions that avoid thermal runaway on a properly heatsinked board. At Tc = 140 °C and duty cycle δ = 0.5, it sustains 1 A average forward current. Derating is required above this case temperature per Figure 2 in the datasheet.

Does STPS1L20MF require a heatsink in typical portable applications?

No external heatsink is required. With its 20 °C/W junction-to-case thermal resistance and exposed cathode pad, the device achieves safe operation using only a minimum recommended 100 mm² copper area on FR4 PCB. Thermal simulation shows ≤10 °C rise at 0.5 W dissipation under natural convection.

Can STPS1L20MF replace standard PN diodes in existing 20 V designs?

Yes-provided the PCB footprint matches the STmite flat outline and layout accounts for the cathode pad's dual thermal/electrical role. Its 20 V VRRM and 1 A rating match common 1N5819-class replacements, but VF is ~40% lower, improving efficiency without circuit modification.

Is STPS1L20MF suitable for automotive infotainment power rails?

No-it is not qualified to AEC-Q101 and lacks automotive-grade screening or extended temperature validation beyond 150 °C. While functional in benign cabin environments, ST recommends automotive-qualified alternatives like STPS1L20A-Q for under-hood or safety-critical applications.

STPS1L20MF Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: DO-222AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 20 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 430 mV @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 75 µA @ 20 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: STmite Flat

Operating Temperature - Junction:: 150°C (Max)

STPS1L20MF FAQ

1.How can I place an order for STPS1L20MF through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS1L20MF 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 STPS1L20MF reliable?

The price and inventory of STPS1L20MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1L20MF is usually 5 days.

3.What payment methods are accepted for STPS1L20MF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1L20MF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS1L20MF?

STPS1L20MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS1L20MF 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 STPS1L20MF?

For technical support, including STPS1L20MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1L20MF requirements.

6.How does Aetrix verify that STPS1L20MF is sourced from the original manufacturer or authorized distributors?

All STPS1L20MF 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 STPS1L20MF meets industry standards.

7.What is the process for return or replacement of STPS1L20MF?

All STPS1L20MF units undergo pre-shipment inspection (PSI). If there is an issue with STPS1L20MF, 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 STPS1L20MF part is unused and in its original packaging.

Return procedure for STPS1L20MF:

1.Submit a request within 90 days.

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

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