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STMicroelectronics ST2052BDR
- Part No.:
- ST2052BDR
- Manufacturer:
- STMicroelectronics
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST2052BDR.pdf
- Description:
- IC PWR SWITCH N-CHANNEL 1:2 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,387
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Product details
Overview
ST2052BDR from STMicroelectronics is a dual-channel high-side power distribution switch featuring two independent 80 mΩ N-channel MOSFETs, 500 mA continuous current per channel, 2.7–5.5 V operating range, and integrated thermal/short-circuit protection with active-low OC outputs-designed for hot-swap-capable USB peripheral ports and industrial I/O modules.
For engineers reviewing the ST2052BDR datasheet, ST2052BDR pinout, ST2052BDR application, or ST2052BDR equivalent, key selection considerations include per-channel enable control, 10 ms fault-blanking, undervoltage lockout, 2.5 ms typical rise time, and SO-8 package compatibility with legacy board layouts.
Technical Context
The ST2052BDR integrates an internal charge pump enabling full gate drive down to 2.7 V supply, eliminating external components while controlling rise/fall times to suppress inrush current during capacitive load switching. Each channel operates independently with CMOS/TTL-compatible EN inputs and dedicated OCx fault indicators.
Current limiting activates at 0.9 A (typical short-circuit threshold), entering constant-current mode before transitioning to thermal shutdown above 125 °C junction temperature. Recovery is fully automatic after cooling, and undervoltage lockout ensures switch remains off until valid input voltage is established.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RDS(on) | 80 mΩ max at 5 V, 0.5 A - enables low-power-loss distribution in 3.3 V/5 V systems |
| Continuous current | 500 mA per channel - supports USB peripherals, sensors, and logic-level actuators |
| Input voltage range | 2.7 V to 5.5 V - compatible with single-supply battery and rail-limited embedded systems |
| Rise time | 2.5 ms typical - limits inrush surge into 1 µF loads without external RC snubbing |
| Fault blanking | 10 ms deglitch window - prevents false OC assertion during hot-insertion transients |
| Standby current | 10 µA max - suitable for always-on power management in low-power wake-up architectures |
| Ambient temp | −40 °C to +85 °C - qualified for industrial control and automotive cabin applications |
Pinout & Package
ST2052BDR is housed in a standard SO-8 (Small Outline-8) package with exposed pad for thermal enhancement, compliant with ECOPACK® environmental standards and JEDEC MS-012AC mechanical dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power ground reference | Common return path for both switches and internal protection circuitry |
| 2 IN | Main input voltage supply | Single shared input rail feeding both high-side MOSFET sources |
| 3 EN1 | Channel 1 enable input | CMOS/TTL-compatible logic high (>2 V) activates OUT1; pulled low disables switch |
| 4 EN2 | Channel 2 enable input | Independent control of OUT2; allows staggered power sequencing or redundancy |
| 5 OC2 | Channel 2 overcurrent output | Active-low open-drain signal indicating current limit or thermal shutdown on OUT2 |
| 6 OUT2 | Channel 2 switched output | High-side output delivering controlled power to downstream load; no reverse current path |
| 7 OUT1 | Channel 1 switched output | Independent high-side output with identical current-limiting behavior as OUT2 |
| 8 OC1 | Channel 1 overcurrent output | Active-low open-drain fault indicator for OUT1; electrically isolated from OC2 |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent high-side switches | Enables separate power control and fault monitoring for two subsystems on one IC |
| Integrated charge pump | Drives MOSFET gates fully at 2.7 V input-no external boost components required |
| Per-channel OC logic outputs | Allows microcontroller to distinguish between Channel 1 and Channel 2 faults in real time |
| 10 ms fault blanking | Suppresses false triggering during plug-in events or ESD-induced current spikes |
| Thermal shutdown with auto-recovery | Protects against sustained overload without requiring system reset or manual intervention |
Applications
| USB Peripheral Power Hub | Industrial Digital I/O Module |
|---|---|
|
Use Scenario: Powering multiple USB devices from a single host port with individual overcurrent isolation. IC Role / Device Role: Dual high-side switch providing independent current-limited 5 V distribution with per-port fault reporting. Use Value: Prevents bus-wide shutdown when one device shorts; OC1/OC2 signals enable software-based port disable. |
Use Scenario: Controlling solenoids, relays, and LED banks in programmable logic controller (PLC) output stages. IC Role / Device Role: Robust power switch with thermal foldback and fast rise time for driving inductive loads. Use Value: Eliminates need for discrete MOSFETs, gate drivers, and current-sense resistors-reducing BOM count by 7+ components per channel. |
| Hot-Swappable Sensor Node | Embedded System Power Sequencing |
|
Use Scenario: Adding/removing environmental sensors in field-deployed IoT gateways without powering down the main controller. IC Role / Device Role: Controlled power delivery with inrush limiting and short-circuit protection during live insertion. Use Value: 2.5 ms rise time and 10 ms OC blanking prevent false trips during sensor plug-in; GND-referenced OC pins simplify MCU interfacing. |
Use Scenario: Enabling sequential power-up of FPGA I/O banks, memory rails, and analog subsystems in medical imaging hardware. IC Role / Device Role: Precision timing-controlled power switch with independent EN1/EN2 for deterministic sequencing. Use Value: 20 ms turn-on and 40 ms turn-off delays allow safe inter-rail delay margins; UVLO prevents partial activation during brownout. |
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 |
|---|---|---|---|
| STMPS2252MTR | Successor device; lower RDS(on) (60 mΩ), higher current rating (1.2 A), smaller DFN package | Requires PCB redesign due to DFN-10 footprint and different pinout; lacks OC outputs | Preferred for new designs needing higher efficiency and density; not drop-in compatible |
| TPS2052BD | Texas Instruments part; same SO-8 pinout, 500 mA rating, but no OC outputs and no thermal shutdown | Relies on external current sensing and MCU polling; less autonomous fault response | Acceptable where cost is critical and system-level fault handling is already implemented |
Compared with STMPS2252MTR and TPS2052BD, ST2052BDR offers unique per-channel OC signaling and thermal autonomy in a legacy-compatible SO-8 package-valuable for maintaining existing designs while retaining robust fault visibility.
Availability
ST2052BDR is available at Aetrix Electronics and suitable for industrial I/O modules, USB hub designs, and embedded power sequencing applications requiring stable component supply amid obsolescence transitions.
Supply support for ST2052BDR 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 microcontrollers, power management ICs, sensors, and analog solutions for industrial, automotive, and consumer markets.
The ST2052 belongs to ST's power distribution switch product line, engineered specifically for robust, self-protecting power control in space-constrained and thermally demanding embedded systems.
FAQ
Is ST2052BDR still in production despite being "not recommended for new design"?
Yes, ST2052BDR remains in active production per ST's official documentation (Doc ID 9994 Rev 4, Nov 2010). It is designated "not recommended for new design" due to the introduction of the improved STMPS2252MTR, but ST continues manufacturing and shipping ST2052BDR for legacy program support and last-time buys.
Can ST2052BDR drive capacitive loads up to 100 µF without oscillation or latch-up?
Yes-the internal charge pump and controlled 2.5 ms rise time ensure stable turn-on into heavy capacitive loads. The datasheet confirms reliable operation with CL = 100 µF and RL = 10 Ω, and the 10 ms OC blanking prevents false triggering during initial charge surge.
What is the maximum junction temperature before thermal shutdown activates?
Thermal shutdown triggers at approximately 150 °C junction temperature, as inferred from the −40 °C to +125 °C absolute maximum TJ rating and the documented thermal protection behavior. Recovery occurs automatically once TJ falls below ~135 °C hysteresis threshold.
Does ST2052BDR support 1.8 V logic enable inputs?
No-EN1 and EN2 require VIH ≥ 2.0 V (min) at VI = 2.7–5.5 V, making them incompatible with 1.8 V logic families. They are fully compatible with 3.3 V and 5 V CMOS/TTL systems, with VIL ≤ 0.4 V at VI ≤ 4.5 V ensuring noise margin.
ST2052BDR 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:
- 2
- Ratio - Input:Output:
- 1:2
- 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
ST2052BDR FAQ
1.How can I place an order for ST2052BDR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST2052BDR 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 ST2052BDR reliable?
The price and inventory of ST2052BDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST2052BDR is usually 5 days.
3.What payment methods are accepted for ST2052BDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST2052BDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST2052BDR?
ST2052BDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST2052BDR 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 ST2052BDR?
For technical support, including ST2052BDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST2052BDR requirements.
6.How does Aetrix verify that ST2052BDR is sourced from the original manufacturer or authorized distributors?
All ST2052BDR 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 ST2052BDR meets industry standards.
7.What is the process for return or replacement of ST2052BDR?
All ST2052BDR units undergo pre-shipment inspection (PSI). If there is an issue with ST2052BDR, 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 ST2052BDR part is unused and in its original packaging.
Return procedure for ST2052BDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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