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STMicroelectronics STPS15L45CB-TR
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- Part No.:
- STPS15L45CB-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
STPS15L45CB-TR.pdf
- Description:
- DIODE ARRAY SCHOTT 45V 7.5A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:7,191
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Product details
Overview
STPS15L45CB-TR from STMicroelectronics is a dual-center-tab Schottky rectifier in DPAK package, rated for 45 V repetitive peak reverse voltage and 2 × 7.5 A average forward current per diode, with typical forward voltage drop of 0.40 V at 125 °C and 7.5 A. It serves as a low-loss freewheeling or switching diode in high-frequency DC–DC converters and SMPS secondary-side rectification.
For engineers reviewing the STPS15L45CB-TR datasheet, STPS15L45CB-TR pinout, STPS15L45CB-TR application, or STPS15L45CB-TR equivalent, key selection criteria include its dual-diode configuration, 0.40 V VF(typ.) at 125 °C, 150 °C max junction temperature, avalanche-rated capability (265 W), and DPAK thermal performance with Rth(j-c) = 2.4 °C/W (total).
Technical Context
This dual Schottky rectifier integrates two independent anode-cathode junctions sharing a common center tab (cathode-connected center tab), enabling synchronous or interleaved freewheeling paths in half-bridge or full-bridge topologies. Its low capacitance (typ. 1 nF at 30 V) and negligible reverse recovery charge support operation beyond 500 kHz.
The device uses platinum-doped silicon to achieve stable VF over temperature and robust avalanche energy handling (PARM = 265 W, tp = 10 µs). Thermal coupling between diodes is characterized by Rth(c) = 0.7 °C/W, allowing accurate junction temperature estimation when both diodes conduct simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum reverse blocking voltage per diode; defines usable input/output voltage range in buck, flyback, or LLC secondary side. |
| IF(AV) per diode | 7.5 A - Continuous DC current rating per diode at Tc = 140 °C; supports 15 A total device output with proper heatsinking. |
| VF(typ.) | 0.40 V @ 7.5 A, 125 °C - Low conduction loss enables >95% efficiency in 5–12 V output SMPS designs. |
| Rth(j-c) total | 2.4 °C/W - Junction-to-case thermal resistance for both diodes; enables direct mounting to PCB copper pour or heatsink for thermal management. |
| CJ(typ.) | 1 nF @ VR = 30 V, 1 MHz - Low junction capacitance minimizes switching node ringing and EMI in high-dV/dt applications. |
| IFSM | 75 A @ tp = 10 ms - Surge current rating ensures robustness against inrush or short-circuit transients in power supplies. |
| Tj(max) | 150 °C - Maximum junction temperature; allows operation in industrial ambient up to 85 °C with adequate thermal design. |
Pinout & Package
DPAK (TO-252-3) package with exposed cathode thermal pad; center tab is common cathode for both diodes; pins 1 and 3 are anodes, pin 2 is cathode (center tab).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode 1) | Anode of Diode 1 | Connects to switching node (e.g., MOSFET drain) in half-bridge leg; carries forward current during freewheeling phase. |
| Pin 2 (Cathode / Center Tab) | Common Cathode | Thermally and electrically connected to PCB copper pour; must be soldered to large copper area for heat dissipation and low-inductance return path. |
| Pin 3 (Anode 2) | Anode of Diode 2 | Independent anode for second freewheeling path; enables dual-output or interleaved converter configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Low VF with temperature stability | 0.40 V typ. @ 125 °C/7.5 A - Reduces conduction loss drift across operating temperature range. |
| Avalanche energy rating | 265 W @ tp = 10 µs - Enables reliable operation under inductive turn-off stress without external snubbers. |
| ECOPACK2 compliance | Lead-free, halogen-free, RoHS-compliant packaging - Meets industrial and automotive environmental requirements without derating. |
| Low thermal resistance coupling | Rth(c) = 0.7 °C/W - Allows accurate thermal modeling when both diodes operate concurrently in multi-phase designs. |
Applications
| Server VRM Output Stage | Industrial DC–DC Converter |
|---|---|
Use Scenario: High-current, low-voltage (3.3–12 V) point-of-load regulation in datacenter server motherboards. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter secondary side, conducting during low-side MOSFET off-time. Use Value: 0.40 V VF minimizes conduction loss at 50–100 A output, improving overall VRM efficiency by 0.8–1.2% versus standard Schottkys. | Use Scenario: Isolated 24 V to 5 V/12 V DC–DC conversion in programmable logic controllers (PLCs) and motor drives. IC Role / Device Role / Timing Role: Secondary-side rectifier in forward or flyback topology, handling continuous 10–15 A load current. Use Value: 150 °C Tj(max) and 2.4 °C/W Rth(j-c) enable stable operation at 70 °C ambient without forced air cooling. |
| Automotive Body Control Module | Telecom Power Shelf |
Use Scenario: Reverse polarity protection and load dump clamping in 12 V automotive body electronics. IC Role / Device Role / Timing Role: Dual-anode configuration used for redundant protection paths across multiple subsystems. Use Value: Avalanche rating (265 W) absorbs ISO 7637-2 pulse 5a transients without failure, eliminating need for external TVS. | Use Scenario: High-density 48 V to 12 V intermediate bus conversion in telecom rack power systems. IC Role / Device Role / Timing Role: Parallel-connected freewheeling diode pair in interleaved multiphase buck stages. Use Value: Low 1 nF junction capacitance suppresses high-frequency switching noise, easing EMI filter design and reducing conducted emissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS15H100CG-TR | 100 V VRRM, same DPAK package and 2×7.5 A rating; VF = 0.65 V @ 125 °C/7.5 A | Suitable for higher-input-voltage SMPS (e.g., 48 V input); higher VF increases conduction loss in low-Vout designs | Select when reverse voltage margin >60 V required; avoid if optimizing for <5 V output efficiency. |
| MBR1545CTG | 45 V VRRM, TO-220AB package, single-package dual diode; VF = 0.55 V @ 25 °C/7.5 A, no avalanche rating | Larger footprint and higher Rth(j-a); lacks avalanche specification for transient robustness | Use only in cost-sensitive, non-automotive applications where thermal budget permits and surge immunity is not critical. |
Compared with STPS15L45CB-TR, the STPS15H100CG-TR trades lower VF for higher VRRM but sacrifices efficiency in low-voltage outputs, while the MBR1545CTG offers identical voltage rating but inferior thermal performance and no avalanche capability-making the STPS15L45CB-TR optimal for compact, high-reliability 45 V-class SMPS.
Availability
STPS15L45CB-TR is available at Aetrix Electronics and suitable for server VRMs, industrial DC–DC converters, automotive body control modules, and telecom power shelves requiring stable component supply and long-term manufacturability.
Supply support for STPS15L45CB-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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The STPS series targets high-efficiency power conversion with optimized Schottky technology for SMPS, freewheeling, and polarity protection-emphasizing low VF, thermal robustness, and avalanche reliability in surface-mount packages.
FAQ
What is the cathode connection configuration in STPS15L45CB-TR?
Pin 2 (center tab) is the common cathode for both internal diodes. Pins 1 and 3 are independent anodes. This configuration enables dual-path freewheeling or independent rectification in multi-output topologies without external interconnection.
Can STPS15L45CB-TR replace a single-diode Schottky in existing designs?
Yes, but only if the circuit uses only one anode (e.g., Pin 1 or Pin 3) and ties the unused anode to cathode or leaves it unconnected. The shared cathode simplifies layout but requires verification that reverse bias on the idle diode remains within VRRM during operation.
How does the 2.4 °C/W Rth(j-c) total value relate to per-diode thermal resistance?
Rth(j-c) per diode is 4.0 °C/W; the total 2.4 °C/W reflects combined thermal path when both diodes conduct simultaneously, including coupling via the shared cathode tab. Use the coupled value for worst-case thermal analysis in dual-conduction scenarios.
Is STPS15L45CB-TR suitable for synchronous rectification?
No-it is a passive Schottky rectifier, not a synchronous MOSFET controller or driver. It replaces conventional diodes in non-synchronous topologies. For synchronous rectification, a dedicated gate driver IC and MOSFET pair are required.
STPS15L45CB-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 7.5A
- Voltage - Forward (Vf) (Max) @ If:
- 520 mV @ 7.5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 45 V
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
STPS15L45CB-TR FAQ
1.How can I place an order for STPS15L45CB-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS15L45CB-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 STPS15L45CB-TR reliable?
The price and inventory of STPS15L45CB-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS15L45CB-TR is usually 5 days.
3.What payment methods are accepted for STPS15L45CB-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS15L45CB-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS15L45CB-TR?
STPS15L45CB-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS15L45CB-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 STPS15L45CB-TR?
For technical support, including STPS15L45CB-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS15L45CB-TR requirements.
6.How does Aetrix verify that STPS15L45CB-TR is sourced from the original manufacturer or authorized distributors?
All STPS15L45CB-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 STPS15L45CB-TR meets industry standards.
7.What is the process for return or replacement of STPS15L45CB-TR?
All STPS15L45CB-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS15L45CB-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 STPS15L45CB-TR part is unused and in its original packaging.
Return procedure for STPS15L45CB-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS15L45CB-TR Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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