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STMicroelectronics STPS120MF
- Part No.:
- STPS120MF
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-222AA
- Datasheet:
-
STPS120MF.pdf
- Description:
- DIODE SCHOTT 20V 1A STMITE FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:11,783
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Product details
Overview
STPS120MF from STMicroelectronics is a single silicon Schottky rectifier in STmite flat package, rated for 1 A average forward current and 20 V repetitive peak reverse voltage, with typical forward voltage drop of 0.36 V at 100 °C and 1 A. It serves as a low-loss freewheeling or polarity protection diode in high-frequency DC-DC converters for portable battery-powered equipment.
For engineers reviewing the STPS120MF datasheet, STPS120MF pinout, STPS120MF application, or STPS120MF equivalent, key selection criteria include its 0.85 mm profile, 20 °C/W junction-to-case thermal resistance, avalanche-rated 100 W pulse power, and compatibility with standard STmite footprint layouts in space-constrained PCBs.
Technical Context
This Schottky rectifier uses a planar metal-silicon junction to achieve negligible reverse recovery charge and extremely fast switching-no minority carrier storage. Its low VF (0.36–0.49 V) and low Rth(j-c) (20 °C/W) enable high-efficiency operation in 300 kHz–1 MHz switch-mode topologies.
The device features specified avalanche capability (100 W, 10 µs, Tj = 125 °C), validated per AN1768/AN2025, and operates up to 150 °C junction temperature. Reverse leakage remains below 850 µA at 100 °C and VRRM, supporting stable performance in thermally demanding environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 1 A - supports continuous output current in compact DC-DC buck stages for USB-powered devices |
| VRRM | 20 V - suitable for 12 V input rails with margin against transient overvoltage |
| VF (typ) | 0.36 V @ 1 A, 100 °C - reduces conduction loss to ~0.36 W, improving battery runtime |
| Rth(j-c) | 20 °C/W - enables direct thermal coupling to copper pour for passive cooling without heatsink |
| IFSM | 50 A @ 10 ms - withstands inrush surges during hot-plug or load-step events |
| PARM | 100 W @ 10 µs - provides robustness against inductive kickback in flyback or synchronous rectifier circuits |
Pinout & Package
STPS120MF is housed in the STmite flat surface-mount package (JEDEC MO-229 variant), measuring 2.05 × 3.90 × 0.95 mm (L × E × A), with 0.85 mm nominal height and halogen-free epoxy molding compound compliant with UL94 V0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point under forward bias | Connected to switching node (e.g., MOSFET drain in buck sync rectifier); requires low-inductance layout |
| Cathode | Current exit point under forward bias | Connected to output rail or ground return; large copper area recommended for thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (0.85 mm) | Enables integration into ultra-thin consumer devices such as PCMCIA cards and slim notebook adapters |
| Backward-compatible STmite footprint | Allows drop-in replacement of legacy STPS1xxMF series without PCB redesign |
| Negligible switching losses | Eliminates reverse recovery tail, reducing EMI and enabling >1 MHz operation without snubbers |
| Avalanche capability specified | Guarantees safe clamping of inductive energy spikes without parameter drift or failure |
| Low thermal resistance (Rth(j-c) = 20 °C/W) | Permits full 1 A load at 140 °C case temperature with minimal derating |
Applications
| USB-C Power Delivery Adapter | Portable Medical Sensor Module |
|---|---|
Use Scenario: 5–20 V input DC-DC conversion delivering regulated 3.3 V/5 V to microcontroller and sensors. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter secondary side. Use Value: 0.36 V VF minimizes power loss at 1 A load, extending single-cell Li-ion battery life by >8% vs. higher-VF alternatives. | Use Scenario: Battery-backed wearable sensor node requiring polarity protection and low standby leakage. IC Role / Device Role / Timing Role: Reverse polarity protection diode on main power input rail. Use Value: IR < 2.0 µA @ 5 V and 25 °C ensures < 10 nW standby dissipation, preserving months-long shelf life. |
| PCMCIA Card Power Interface | Industrial Handheld Scanner |
Use Scenario: Hot-swap 3.3 V supply interface with transient suppression and rail isolation. IC Role / Device Role / Timing Role: OR-ing diode between dual power sources (battery + host bus). Use Value: 0.85 mm height fits within PCMCIA Type II envelope; 20 V rating covers ±10% tolerance on 3.3 V bus. | Use Scenario: 12 V input DC-DC stage powering CMOS image sensor and laser driver. IC Role / Device Role / Timing Role: Output rectifier in isolated flyback auxiliary winding. Use Value: Avalanche rating absorbs reflected leakage energy during MOSFET turn-off, eliminating need for external TVS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS12 | Higher VF (0.5 V typ @ 1 A), larger SOD-123 package (1.6 mm height), no avalanche rating | Limited to non-critical, low-stress rectification where surge immunity is not required | Choose when cost is primary concern and thermal budget allows higher conduction loss |
| MBR120LSFT1G | Same VF range but TO-277 package (2.3 mm height), Rth(j-c) = 30 °C/W, no avalanche spec | Requires more board area and thermal relief; unsuitable for sub-1 mm height constraints | Prefer only if existing TO-277 footprint reuse is mandatory and height is not limiting |
Compared with SS12 and MBR120LSFT1G, STPS120MF uniquely combines sub-1 mm profile, 20 °C/W thermal resistance, and guaranteed avalanche capability-making it the only option for space-constrained, high-reliability DC-DC outputs in portable industrial tools.
Availability
STPS120MF is available at Aetrix Electronics and suitable for USB-C power adapters, portable medical sensors, PCMCIA card interfaces, and industrial handheld scanners requiring stable component supply across multi-year production cycles.
Supply support for STPS120MF 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, MCU, power, and MEMS products for automotive, industrial, and consumer markets.
STPS120MF belongs to ST's STmite flat Schottky rectifier product line, engineered specifically for ultra-thin, high-frequency power conversion in battery-powered portable electronics.
FAQ
What is the maximum allowable ambient temperature for continuous 1 A operation?
At 1 A average forward current and δ = 0.5 square wave, the STPS120MF can operate continuously up to 70 °C ambient temperature when mounted on FR4 PCB with minimum recommended pad size (Rth(j-a) = 250 °C/W). Derating is required above this point per Figure 2 in the datasheet.
Does STPS120MF require a heatsink for 1 A operation?
No heatsink is required. With Rth(j-c) = 20 °C/W and typical PCB copper area, the device maintains Tj < 150 °C at 1 A and 70 °C ambient. Thermal performance relies on cathode-side copper pour-not external heatsinks-as confirmed in Figure 9 and Table 3.
Is STPS120MF suitable for reverse polarity protection in 5 V systems?
Yes. With VRRM = 20 V and IR < 2.0 µA at 5 V and 25 °C, it provides reliable reverse blocking while adding < 10 mΩ effective series resistance-ideal for low-drop, low-leakage protection in always-on 5 V rails.
How is avalanche capability validated for STPS120MF?
Avalanche energy is validated per ST application notes AN1768 and AN2025 using standardized 10 µs pulses at Tj = 125 °C. The 100 W rating corresponds to 1 mJ per pulse, with test conditions documented in the "Admissible avalanche power" methodology and verified across production lots.
STPS120MF 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:
- 490 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 3.9 µA @ 20 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- STmite Flat
- Operating Temperature - Junction:
- 150°C (Max)
STPS120MF FAQ
1.How can I place an order for STPS120MF through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS120MF 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 STPS120MF reliable?
The price and inventory of STPS120MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS120MF is usually 5 days.
3.What payment methods are accepted for STPS120MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS120MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS120MF?
STPS120MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS120MF 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 STPS120MF?
For technical support, including STPS120MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS120MF requirements.
6.How does Aetrix verify that STPS120MF is sourced from the original manufacturer or authorized distributors?
All STPS120MF 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 STPS120MF meets industry standards.
7.What is the process for return or replacement of STPS120MF?
All STPS120MF units undergo pre-shipment inspection (PSI). If there is an issue with STPS120MF, 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 STPS120MF part is unused and in its original packaging.
Return procedure for STPS120MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS120MF Tags
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