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STMicroelectronics STPS1045DEE-TR
- Part No.:
- STPS1045DEE-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- 8-PowerTDFN
- Datasheet:
-
STPS1045DEE-TR.pdf
- Description:
- DIODE SCHOTTKY 45V 10A POWERFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:64,313
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Product details
Overview
STPS1045DEE-TR from STMicroelectronics is a 45 V, 10 A average forward current Schottky rectifier in PowerFLAT 3.3×3.3 mm package, optimized for high-frequency DC/DC converters and freewheeling paths. It features 0.45 V typical forward voltage at 125 °C, 175 °C max junction temperature, and 4 °C/W junction-to-case thermal resistance-enabling compact, thermally efficient power stage designs in battery chargers and telecom supplies.
For engineers reviewing the STPS1045DEE-TR datasheet, STPS1045DEE-TR pinout, STPS1045DEE-TR application, or STPS1045DEE-TR equivalent, key selection criteria include low VF conduction loss at high ambient temperature, avalanche-rated surge capability (100 A), and surface-mount compatibility with space-constrained PCB layouts using PowerFLAT footprint.
Technical Context
This Schottky rectifier operates as a unidirectional freewheeling or polarity protection device in synchronous and non-synchronous buck, boost, and flyback topologies. Its negligible reverse recovery charge and fast switching enable high-efficiency operation above 100 kHz without snubber networks.
The device leverages platinum-doped silicon to achieve stable VF across temperature (0.45–0.53 V at 125 °C, IF = 10 A) and specified avalanche energy handling (300 W, 10 µs pulse), supporting robust transient immunity in DC/DC output stages and battery input protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 12–36 V input rails. |
| IF(AV) | 10 A - Average forward current at Tc = 145 °C; supports continuous 12 V/50 W converter output stages. |
| VF (typ.) | 0.45 V @ 125 °C, 10 A - Low conduction loss reduces power dissipation by ~45% vs. standard silicon diodes. |
| Tj (max.) | 175 °C - Enables operation in sealed enclosures or high-ambient environments without derating. |
| Rth(j-c) | 4 °C/W - Allows direct thermal coupling to copper pour or heatsink for <10 W dissipation without forced airflow. |
| IFSM | 100 A @ 10 ms - Withstands inrush and short-circuit transients in battery charger and SSD power-up sequences. |
| IR (max.) | 40 mA @ 125 °C, VR = 45 V - Limits standby leakage in always-on polarity protection circuits. |
Pinout & Package
Package: PowerFLAT 3.3 × 3.3 mm, 2-terminal surface-mount package with exposed cathode pad for thermal and electrical connection. Dimensions per DS9067 Rev 2: D/E = 3.2–3.4 mm, A = 0.9–1.1 mm height, L1 = 0.5–0.7 mm lead length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top metal pad) | Forward current entry point | Connected to switch node or positive rail; requires minimum 1.61 mm² copper area under tab for Rth(j-a) ≤ 8 °C/W. |
| Cathode (exposed bottom pad) | Forward current exit / thermal path | Soldered directly to PCB ground plane or thermal pad; primary heat dissipation path to board. |
Key Features
| Feature | Design Value |
|---|---|
| Very low conduction losses | 0.45 V VF at 10 A and 125 °C enables <5 W conduction loss in 12 V/10 A output stage. |
| Extremely fast switching | Negligible Qrr eliminates reverse recovery loss and EMI in >200 kHz DC/DC converters. |
| Avalanche capacity specified | 300 W peak avalanche power (10 µs) provides validated clamping margin during MOSFET turn-off overshoot. |
| Low thermal resistance | 4 °C/W Rth(j-c) allows full 10 A rating with minimal PCB copper area-no external heatsink required. |
| ECOPACK2 compliant | Meets RoHS, halogen-free, and REACH requirements for industrial and consumer end-equipment compliance. |
Applications
| Battery Charger Output Stage | Telecom DC/DC Converter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in 12–24 V, 5–10 A offline battery chargers for cordless tools. IC Role / Device Role / Timing Role: Freewheeling diode in non-synchronous buck converter; conducts during low-side switch off-time. Use Value: 0.45 V VF minimizes conduction loss and thermal rise in sealed plastic enclosures, extending battery pack lifetime. | Use Scenario: Output rectification in 48 V input telecom DC/DC modules delivering 12 V/8 A to baseband processors. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in cost-sensitive 200–500 kHz isolated flyback designs. Use Value: Avalanche rating absorbs transformer leakage spikes without external clamp, reducing BOM count and layout area. |
| SSD Power Rail Polarity Protection | Cordless Appliance Motor Drive Clamp |
Use Scenario: Reverse-voltage protection on +5 V and +3.3 V power inputs of NVMe SSD modules. IC Role / Device Role / Timing Role: Series-connected polarity guard diode; blocks reverse current while passing forward load current. Use Value: 40 mA IR max at 125 °C ensures <1 mW standby loss, critical for ultra-low-power storage subsystems. | Use Scenario: Flyback clamp in brushed DC motor H-bridge drivers for cordless vacuum cleaners and drills. IC Role / Device Role / Timing Role: Freewheeling path for inductive kickback during PWM switch-off transitions. Use Value: 100 A IFSM withstands repeated motor stall currents without degradation, improving field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS10450MX | Same 45 V VRRM, 10 A IF(AV), but VF = 0.52 V typ. @ 125 °C; Rth(j-c) = 5.5 °C/W. | Higher conduction loss and thermal resistance limit use in >7 A continuous applications without enhanced cooling. | Select when legacy ON Semi supply chain alignment is required and 0.07 V higher VF is acceptable. |
| Vishay VS-10BQ045-M3 | 45 V, 10 A, VF = 0.50 V @ 125 °C; PowerPAK SO-8 package (larger footprint, higher Rth(j-a)). | SO-8 body increases PCB area by 2.5× and limits high-density layout; better suited for prototyping than volume production. | Prefer for evaluation or mixed-technology boards where SO-8 footprint already exists. |
Compared with NSS10450MX and VS-10BQ045-M3, STPS1045DEE-TR delivers the lowest VF at elevated temperature and best thermal performance in its class, making it optimal for space- and efficiency-critical 10 A DC/DC outputs where PowerFLAT footprint is supported.
Availability
STPS1045DEE-TR is available at Aetrix Electronics and suitable for battery chargers, telecom DC/DC converters, SSD power management, and cordless appliance motor drives requiring stable component supply and long-term industrial availability.
Supply support for STPS1045DEE-TR 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, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
The STPS series targets high-efficiency, high-reliability power conversion with Schottky rectifiers optimized for 20–100 V, 5–40 A applications in compact surface-mount packages.
FAQ
What is the maximum allowable PCB copper area for thermal performance?
The datasheet specifies that a 2.19–2.39 mm² copper surface under the cathode pad achieves Rth(j-a) ≤ 8 °C/W on FR4 with 35 µm copper. For full 10 A rating at 145 °C case temperature, ≥2.5 cm² total thermal pad area with multiple vias to inner layers is recommended.
Can STPS1045DEE-TR replace a standard PN junction diode in an existing design?
Yes-if the original diode's VRRM ≥ 45 V and IF(AV) ≤ 10 A. Due to zero reverse recovery, layout changes may be needed to remove snubbers, and thermal pads must be updated to match PowerFLAT 3.3×3.3 mm dimensions and cathode-exposed footprint.
Is this device suitable for synchronous rectification?
No-it is a passive Schottky rectifier, not a controlled MOSFET-based synchronous rectifier IC. It functions only as a unidirectional freewheeling or polarity protection diode; gate drive signals or control logic are not supported.
What is the meaning of "ECOPACK2 compliant" for this part?
ECOPACK2 compliance certifies that STPS1045DEE-TR meets RoHS Directive 2011/65/EU, is halogen-free (≤900 ppm Cl + Br), and conforms to ST's environmental standards for material content, packaging, and manufacturing-supporting WEEE and REACH compliance in final equipment.
STPS1045DEE-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-PowerTDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 590 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerFlat™ (3.3x3.3)
- Operating Temperature - Junction:
- 175°C (Max)
STPS1045DEE-TR FAQ
1.How can I place an order for STPS1045DEE-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS1045DEE-TR 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 STPS1045DEE-TR reliable?
The price and inventory of STPS1045DEE-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1045DEE-TR is usually 5 days.
3.What payment methods are accepted for STPS1045DEE-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1045DEE-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS1045DEE-TR?
STPS1045DEE-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS1045DEE-TR 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 STPS1045DEE-TR?
For technical support, including STPS1045DEE-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1045DEE-TR requirements.
6.How does Aetrix verify that STPS1045DEE-TR is sourced from the original manufacturer or authorized distributors?
All STPS1045DEE-TR 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 STPS1045DEE-TR meets industry standards.
7.What is the process for return or replacement of STPS1045DEE-TR?
All STPS1045DEE-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS1045DEE-TR, 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 STPS1045DEE-TR part is unused and in its original packaging.
Return procedure for STPS1045DEE-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS1045DEE-TR Tags
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