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STMicroelectronics STPS2L25UF
- Part No.:
- STPS2L25UF
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-221AA, SMB Flat Leads
- Datasheet:
-
STPS2L25UF.pdf
- Description:
- DIODE SCHOTTKY 25V 2A SMBFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:2,229
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Product details
Overview
STPS2L25UF from STMicroelectronics is a 25 V, 2 A low-drop Schottky rectifier optimized for high-frequency DC/DC converters and synchronous rectification with MOSFETs. It features a typical forward voltage of 0.325 V at 125 °C and 2 A, avalanche rating up to 108 W (10 µs), and thermal resistance of 20 °C/W (SMA Flat Notch) for efficient power dissipation in compact cordless appliance and telecom power supplies.
For engineers reviewing the STPS2L25UF datasheet, STPS2L25UF pinout, STPS2L25UF application, or STPS2L25UF equivalent, key selection criteria include forward voltage at elevated temperature, avalanche energy capability, thermal resistance under PCB copper area constraints, and compatibility with SMB or SMA Flat Notch footprint layouts for thermal management.
Technical Context
This Schottky rectifier uses a planar silicon structure with metal–semiconductor junction to achieve low VF and fast recovery without minority-carrier storage. Its conduction losses are minimized via low series resistance, while reverse leakage remains controlled (<30 mA at 125 °C, VR = 25 V) due to optimized barrier height and junction geometry.
The device supports parallel operation with MOSFETs in synchronous rectification topologies, enabled by its low forward drop and stable thermal behavior up to 150 °C junction temperature. Avalanche rating ensures robustness against transient voltage spikes during switching transitions in unregulated or lightly loaded DC/DC stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 25 V - Maximum repetitive reverse voltage before breakdown; sets usable input range in 12–24 V DC/DC designs. |
| IF(AV) | 2 A - Average forward current at TL = 130 °C (SMA Flat Notch); defines continuous output capability in battery charger outputs. |
| VF(typ.) | 0.325 V @ 125 °C, 2 A - Low conduction loss enabling >92% efficiency in 5–12 V output stages. |
| Tj(max.) | 150 °C - Maximum junction temperature; allows operation in sealed cordless tool enclosures without forced air. |
| Rth(j-l) | 20 °C/W (SMA Flat Notch) - Junction-to-lead thermal resistance; enables direct PCB copper pad heat sinking without external heatsink. |
| PARM | 108 W @ tp = 10 µs - Repetitive avalanche power rating; sustains 40 V transients in telecom power front-ends. |
Pinout & Package
STPS2L25UF is available in two RoHS-compliant surface-mount packages: SMB (JEDEC DO-214AA) and SMA Flat Notch (JEDEC DO-214AC variant with flat cathode notch). Both use lead-free terminations and UL94 V0 epoxy. The SMA Flat Notch version offers lower Rth(j-l) (20 vs. 25 °C/W) and reduced weight (0.039 g).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to switch node or transformer secondary; must be routed with low-inductance trace to minimize ringing. |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band or flat notch; ties to output rail and provides return path for synchronous gate drive reference. |
Key Features
| Feature | Design Value |
|---|---|
| Very low VF | 0.325 V typ. @ 125 °C, 2 A - Reduces conduction loss by ≥35% vs. standard Schottkys in same package. |
| Avalanche rated | 108 W peak (10 µs) - Withstands repeated 40 V transients without degradation in telecom DC/DC inputs. |
| Optimized thermal resistance | Rth(j-l) = 20 °C/W (SMA Flat Notch) - Enables 2 A continuous current on 1 cm² FR4 copper without thermal derating. |
| ECOPACK2 compliant | Lead-free, halogen-free, RoHS-compliant materials - Meets IPC-J-STD-609A Class 2 requirements for industrial end equipment. |
Applications
| Battery Charger Output Stage | Telecom DC/DC Converter |
|---|---|
Use Scenario: Secondary-side rectification in 12 V/2 A wall adapter for cordless power tools. IC Role / Device Role / Timing Role: Schottky rectifier replacing diode in flyback or forward converter output stage. Use Value: 0.325 V VF reduces output loss by 0.65 W vs. 0.65 V diode, lowering thermal stress on PCB and enabling smaller heatsink area. | Use Scenario: Input rectification in 48 V to 12 V isolated DC/DC module for base station power distribution. IC Role / Device Role / Timing Role: Clamp and surge protection rectifier in active OR-ing configuration with MOSFETs. Use Value: 108 W avalanche rating absorbs 40 V line transients without failure, eliminating need for external TVS. |
| SSD Power Rail Protection | Synchronous Rectifier Companion |
Use Scenario: Reverse polarity and overvoltage protection on +3.3 V and +5 V rails of enterprise SSD modules. IC Role / Device Role / Timing Role: Low-loss series rectifier preventing backfeed during hot-swap events. Use Value: <30 mA IR at 125 °C ensures <1 mW standby leakage, preserving data retention during extended idle periods. | Use Scenario: Parallel body-diode replacement in synchronous buck converter for FPGA core supply (0.8–1.2 V, 20 A). IC Role / Device Role / Timing Role: Low-VF freewheeling path during high-side MOSFET off-time. Use Value: 20 °C/W Rth(j-l) allows direct thermal coupling to copper pour, maintaining <110 °C junction temp at 2 A freewheel current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBR225F-E3/52 (Vishay) | VF = 0.52 V @ 25 °C, 2 A; no avalanche rating; SMB only | Lacks transient robustness for telecom input stages; suitable only for low-voltage, low-dV/dt adapters | Select when cost sensitivity outweighs avalanche requirement and thermal margin exceeds 25 °C/W. |
| SS225 (ON Semiconductor) | VF = 0.475 V @ 125 °C, 2 A; Rth(j-l) = 25 °C/W; no PARM spec | Higher conduction loss increases output ripple; requires larger copper area for same thermal performance | Prefer for legacy SMB-only designs where footprint compatibility is mandatory and transient immunity is not critical. |
Compared with MBR225F-E3/52 and SS225, STPS2L25UF delivers superior thermal efficiency (20 °C/W), lower high-temp VF (0.325 V), and verified avalanche endurance-making it optimal for thermally constrained, high-reliability DC/DC and battery charging systems.
Availability
STPS2L25UF is available at Aetrix Electronics and suitable for battery chargers, telecom power modules, SSD power rails, and synchronous rectifier companion circuits requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.
Supply support for STPS2L25UF 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
STPS2L25UF belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for miniaturized, high-frequency switched-mode power supplies where low forward voltage and thermal resilience are critical.
FAQ
What is the maximum allowable ambient temperature for STPS2L25UF at 2 A continuous current?
At 2 A average forward current with δ = 0.5 square wave, the maximum ambient temperature is 130 °C for SMA Flat Notch mounting on ≥1 cm² copper (per Figure 2). This assumes no additional heatsinking and standard FR4 board construction with 35 µm copper thickness.
Does STPS2L25UF support synchronous rectification in buck converters?
Yes-STPS2L25UF is explicitly designed for parallel operation with MOSFETs in synchronous rectification topologies. Its low VF and fast switching response minimize body-diode conduction time, reducing overall power loss in buck and flyback converters operating above 100 kHz.
How does the SMA Flat Notch package improve thermal performance over SMB?
The SMA Flat Notch package reduces Rth(j-l) from 25 °C/W (SMB) to 20 °C/W due to optimized leadframe geometry and enhanced thermal path to PCB copper. This allows 25% higher power handling at the same junction temperature or 10 °C lower Tj under identical conditions.
Is STPS2L25UF qualified for automotive applications?
No-STPS2L25UF is not AEC-Q101 qualified. It meets industrial temperature range (–65 to +150 °C) and ECOPACK2 environmental standards but lacks automotive-specific stress testing, traceability, and PPAP documentation required for automotive ECUs or infotainment systems.
STPS2L25UF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- DO-221AA, SMB Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 25 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 450 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 90 µA @ 25 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMBflat
- Operating Temperature - Junction:
- 150°C (Max)
STPS2L25UF FAQ
1.How can I place an order for STPS2L25UF through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS2L25UF 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 STPS2L25UF reliable?
The price and inventory of STPS2L25UF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS2L25UF is usually 5 days.
3.What payment methods are accepted for STPS2L25UF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS2L25UF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS2L25UF?
STPS2L25UF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS2L25UF 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 STPS2L25UF?
For technical support, including STPS2L25UF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS2L25UF requirements.
6.How does Aetrix verify that STPS2L25UF is sourced from the original manufacturer or authorized distributors?
All STPS2L25UF 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 STPS2L25UF meets industry standards.
7.What is the process for return or replacement of STPS2L25UF?
All STPS2L25UF units undergo pre-shipment inspection (PSI). If there is an issue with STPS2L25UF, 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 STPS2L25UF part is unused and in its original packaging.
Return procedure for STPS2L25UF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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