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STMicroelectronics ST2041BDR
- Part No.:
- ST2041BDR
- Manufacturer:
- STMicroelectronics
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST2041BDR.pdf
- Description:
- IC PWR SWITCH N-CHANNEL 1:1 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,277
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Product details
Overview
ST2041BDR from STMicroelectronics is a dual-channel high-side power distribution switch featuring two 90 mΩ N-channel MOSFETs, 500 mA continuous current per channel, thermal and short-circuit protection with open-drain OC fault output, and operation from 2.7 V to 5.5 V supply. It is used in USB peripheral power management, hot-swap interfaces, and industrial I/O modules where capacitive load inrush and short-circuit resilience are critical.
For engineers reviewing the ST2041BDR datasheet, ST2041BDR pinout, ST2041BDR application, or ST2041BDR equivalent, key selection considerations include its fault-blanking timing (10 ms), CMOS/TTL-compatible active-low enable, undervoltage lockout threshold (2.5 V typ), and SO-8 package thermal performance under sustained 500 mA loads.
Technical Context
The ST2041BDR integrates an internal charge pump to drive high-side MOSFET gates without external components, enabling controlled 2.5 ms rise time and 0.3 ms fall time at 5.5 V. Its overcurrent protection operates in constant-current mode at 500 mA, while thermal shutdown activates at 135 °C with 10 °C hysteresis for safe recovery.
Fault detection uses a dedicated open-drain OC pin with 10 ms blanking window-only persistent current-limit faults beyond this timeout assert OC low; UVLO and die overtemperature faults trigger immediate OC assertion. The device supports dual independent outputs (OUT1/OUT2) and shared input rails (IN1/IN2), with EN_N controlling both channels simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RDS(on) | 90 mΩ @ 5 V, 25 °C - ensures <100 mV dropout at 500 mA, minimizing power loss and self-heating |
| Continuous current | 500 mA per channel - defines maximum steady-state load capability before current limiting engages |
| Fault blanking time | 10 ms - suppresses false OC assertions during hot-swap transients or power-up surges |
| UVLO threshold | 2.5 V typical - prevents erratic switching behavior when supply drops below reliable logic level |
| Standby current | 10 µA max - enables ultra-low quiescent power in system sleep or standby modes |
| Thermal shutdown | 135 °C junction - protects silicon integrity during sustained overload or poor PCB heat sinking |
| ESD rating | 2 kV HBM - provides basic handling robustness during board assembly and field service |
Pinout & Package
ST2041BDR is housed in a standard SO-8 package (ECOPACK® compliant), with exposed pad for enhanced thermal dissipation. Pin count is 8, surface-mount, gull-wing lead form.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power ground reference | Common return path for all internal circuitry and output current sink |
| 2 IN1 | VCC input rail 1 | Primary power input for channel 1; must be ≥2.7 V for proper operation |
| 3 IN2 | VCC input rail 2 | Independent power input for channel 2; allows dual-rail or redundant supply configuration |
| 4 EN_N | Active-low enable control | Logic low enables both channels; high-Z state disables outputs and reduces IOFF to 10 µA |
| 5 OC | Open-drain fault indicator | Pulled low during overcurrent, thermal fault, or UVLO; requires external pull-up resistor |
| 6 OUT3 | Output 3 (not used) | No internal connection; reserved for future revision or test purposes |
| 7 OUT2 | Channel 2 output | High-side switched output for load connected between OUT2 and GND |
| 8 OUT1 | Channel 1 output | High-side switched output for load connected between OUT1 and GND |
Key Features
| Feature | Design Value |
|---|---|
| Fault-blanking timer | 10 ms blanking window prevents OC assertion during hot-swap or startup inrush |
| Integrated charge pump | Enables full gate drive down to 2.7 V input without external components or bootstrap caps |
| Dual independent inputs | IN1 and IN2 allow separate supply domains or redundancy for fault-isolated operation |
| Thermal hysteresis | 10 °C gap between shutdown (135 °C) and recovery (125 °C) avoids oscillation near trip point |
| CMOS/TTL-compatible EN_N | VIL = 0.4 V (2.7–4.5 V range) ensures reliable low-level recognition across logic families |
Applications
| USB Peripheral Power Switching | Industrial Digital I/O Module |
|---|---|
Use Scenario: Controlling power to USB hubs, card readers, or external storage in embedded host systems with strict inrush limits. IC Role / Device Role / Timing Role: High-side power switch managing VBUS delivery with controlled rise time and fault reporting via OC pin. Use Value: Prevents host port reset due to >500 mA inrush; 10 ms blanking tolerates plug-in transients without disabling downstream devices. | Use Scenario: Isolating field-side 24 V or 5 V digital outputs in PLC I/O cards subject to cable shorts and ESD events. IC Role / Device Role / Timing Role: Protected high-side driver with thermal foldback and open-drain fault signaling to controller MCU. Use Value: Enables automatic current limiting at 500 mA and thermal shutdown at 135 °C, eliminating need for discrete fuses or current-sense amplifiers. |
| Hot-Swappable Backplane Slot | Embedded System Power Sequencing |
Use Scenario: Powering add-on mezzanine cards in telecom or test equipment backplanes where live insertion is required. IC Role / Device Role / Timing Role: Dual-channel power switch providing independent enable control and coordinated fault monitoring. Use Value: Dual IN1/IN2 inputs support isolated supply domains; OC pin enables centralized fault logging without per-channel GPIO overhead. | Use Scenario: Sequencing power to FPGA I/O banks or sensor subsystems requiring staggered turn-on and fault isolation. IC Role / Device Role / Timing Role: Controlled high-side switch with precise 2.5 ms rise time and UVLO to prevent partial activation during brownout. Use Value: Ensures clean power ramp with no undershoot or oscillation; UVLO (2.5 V) guarantees stable logic states before enabling downstream logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMPS2141MTR | Successor device with improved RDS(on) (65 mΩ), lower IQ (1 µA), and extended temp range (−40 to 125 °C) | Designed for new designs requiring higher efficiency and wider ambient operation | Select STMPS2141MTR for production releases; ST2041BDR remains viable for legacy repair or inventory reuse |
| TPL7407LDR | 7-channel low-side N-MOSFET array with 300 mA per channel, no thermal shutdown, no OC output | Suitable only for non-critical, low-power loads without fault reporting or thermal protection | Use only if system-level fault handling exists elsewhere; not drop-in compatible due to low-side topology and missing protection features |
Compared with STMPS2141MTR and TPL7407LDR, ST2041BDR offers integrated thermal/overcurrent protection and dual-rail flexibility but lacks the efficiency and temperature range of its successor; TPL7407LDR trades protection for channel count and cannot replace ST2041BDR in safety-critical or high-inrush applications.
Availability
ST2041BDR is available at Aetrix Electronics and suitable for USB peripheral power switching, industrial digital I/O modules, and hot-swappable backplane slots requiring stable component supply despite its "Not Recommended for New Design" status.
Supply support for ST2041BDR 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.
The ST2041 belongs to ST's power distribution switch product line, engineered specifically for robust hot-swap and capacitive-load switching in space-constrained industrial and embedded systems where reliability under fault conditions is paramount.
FAQ
Is ST2041BDR pin-compatible with STMPS2141MTR?
No, ST2041BDR and STMPS2141MTR are not pin-compatible. STMPS2141MTR uses a different pinout: EN is active-high, OC is push-pull, and OUT3 is functional-not reserved. Layout redesign and firmware updates for EN polarity and OC handling are required for migration.
What is the maximum capacitive load the ST2041BDR can safely switch?
The ST2041BDR is characterized with CL = 1 µF in rise/fall time tests, but its 2.5 ms typical rise time and internal current limiting allow safe switching of up to 100 µF loads when combined with appropriate series resistance to limit peak inrush. Larger loads require external RC snubbing or staged enable sequencing.
Does ST2041BDR support independent channel control?
No. ST2041BDR has a single EN_N input controlling both channels simultaneously. There is no provision for independent enable/disable of OUT1 and OUT2; they operate as a synchronized pair. For independent control, consider dual discrete switches or multi-channel alternatives like the TPS2051B.
Can the OC pin drive an LED directly without a current-limiting resistor?
No. The OC pin is open-drain with VO(L) ≤ 0.4 V at 4 mA sink, but it lacks internal current limiting. Driving an LED directly risks exceeding the 4 mA absolute maximum sink rating and damaging the output transistor. A series resistor (e.g., 4.7 kΩ for 5 V pull-up) is mandatory for safe LED indication.
ST2041BDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 500mA
- Rds On (Typ):
- 80mOhm
- Input Type:
- Non-Inverting
- Features:
- -
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ST2041BDR FAQ
1.How can I place an order for ST2041BDR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST2041BDR 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 ST2041BDR reliable?
The price and inventory of ST2041BDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST2041BDR is usually 5 days.
3.What payment methods are accepted for ST2041BDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST2041BDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST2041BDR?
ST2041BDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST2041BDR 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 ST2041BDR?
For technical support, including ST2041BDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST2041BDR requirements.
6.How does Aetrix verify that ST2041BDR is sourced from the original manufacturer or authorized distributors?
All ST2041BDR 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 ST2041BDR meets industry standards.
7.What is the process for return or replacement of ST2041BDR?
All ST2041BDR units undergo pre-shipment inspection (PSI). If there is an issue with ST2041BDR, 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 ST2041BDR part is unused and in its original packaging.
Return procedure for ST2041BDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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