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STMicroelectronics ST2044BDR
- Part No.:
- ST2044BDR
- Manufacturer:
- STMicroelectronics
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST2044BDR.pdf
- Description:
- IC PWR SWTCH N-CHAN 2 X 1:2 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,852
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Product details
Overview
ST2044BDR from STMicroelectronics is a quad-channel high-side power distribution switch featuring four independent 80mΩ N-channel MOSFETs, 500mA continuous current per channel, thermal and short-circuit protection with active-low OCx outputs, and operation from 2.7V to 5.5V supply. It is used in multi-rail power management for industrial I/O modules and embedded systems with hot-swap requirements.
For engineers reviewing the ST2044BDR datasheet, ST2044BDR pinout, ST2044BDR application, or ST2044BDR equivalent, key selection criteria include per-channel current limiting (0.9A trip), 10ms fault blanking, CMOS/TTL-compatible enable inputs, and SO-16 package thermal performance under sustained overload.
Technical Context
The ST2044BDR integrates an internal charge pump enabling full enhancement of its N-channel MOSFETs down to 2.7V supply, eliminating external gate-drive components. Each channel operates independently with dedicated ENx and OCx signals, supporting discrete control and fault reporting without shared logic.
Current limiting is implemented via internal sensing with 0.7–1.3A short-circuit threshold and constant-current foldback. Thermal shutdown activates at junction temperatures exceeding ~125°C, with automatic recovery after cooling - no latch or manual reset required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RDS(on) | 80 mΩ typical at 5V/0.5A - enables low conduction loss and minimal self-heating at rated load |
| Continuous current | 500 mA per channel - supports stable power delivery to moderate-capacitance loads (e.g., USB peripherals, sensors) |
| Supply range | 2.7 V to 5.5 V - compatible with 3.3V and 5V system rails without level-shifting |
| Rise time | 2.5 ms typical - limits inrush current during hot-plug events to prevent bus droop |
| Fault blanking | 10 ms deglitch on OCx - suppresses false overcurrent assertions during transient surges or insertion spikes |
| Standby current | 20 µA max - suitable for always-on subsystems requiring ultra-low quiescent power |
| Operating temp | −40°C to +85°C ambient - validated for industrial temperature-grade operation |
Pinout & Package
ST2044BDR is housed in a standard SO-16 (Small Outline, 16-pin) package with 1.27 mm pitch, ECOPACK® compliant, and rated for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | GNDA / GNDB | Dual ground pins reduce PCB trace inductance and improve thermal dissipation across the die |
| 2, 6 | IN1 / IN2 | Independent input voltage rails - allows dual-supply domain support (e.g., 3.3V and 5V channels) |
| 3–4, 7–8 | EN1–EN4 | Active-low enable inputs - direct interface with microcontroller GPIO without inverters |
| 9–12, 13, 16 | OC4–OC1 | Open-drain active-low overcurrent flags - each reports only its associated channel's fault state |
| 10–11, 14–15 | OUT4–OUT1 | Switched high-side outputs - routed to downstream loads with no external flyback path required |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge pump | Enables full gate drive from 2.7V supply - no external capacitors or boost circuitry needed |
| Per-channel protection | Independent thermal shutdown and current-limiting per switch - prevents single-point failure propagation |
| CMOS/TTL-compatible ENx | VIL ≤ 0.4 V (at 2.7–4.5 V supply) - ensures reliable turn-on with standard logic families |
| Under-voltage lockout (UVLO) | Activates below ~2.5 V with 100 mV hysteresis - avoids erratic switching during brown-out conditions |
| ESD robustness | 2 kV HBM - protects against handling damage during board assembly and field service |
Applications
| Industrial PLC I/O Modules | USB Hub Power Management |
|---|---|
Use Scenario: Distributing switched 5V power to multiple isolated digital output channels in programmable logic controllers. IC Role / Device Role / Timing Role: Quad high-side switch providing independent ON/OFF control and real-time fault feedback per output port. Use Value: Enables safe hot-swap of field devices while preventing bus collapse during short circuits - critical for factory-floor reliability. | Use Scenario: Controlling power to downstream USB ports in a self-powered hub with overcurrent detection. IC Role / Device Role / Timing Role: Per-port power switch with integrated current limiting and OC flag signaling to host controller. Use Value: Meets USB 2.0 specification for port power control and fault reporting without external sense resistors or comparators. |
| Embedded System Backplane | Test Equipment Power Sequencing |
Use Scenario: Managing power domains for FPGA mezzanine cards plugged into a carrier board with staggered startup. IC Role / Device Role / Timing Role: High-side distribution switch with controlled rise time and independent enable sequencing. Use Value: Limits inrush current to <1 A per rail during hot-insertion - avoids triggering upstream supply OCP. | Use Scenario: Enabling calibrated power delivery to DUT (device under test) subcircuits with fault isolation. IC Role / Device Role / Timing Role: Precision-controlled power switch with deterministic fault response and thermal margin monitoring. Use Value: Provides repeatable current-limit behavior (0.9A ±0.2A) and 10ms glitch immunity - essential for automated test repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad high-side power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2044BD | 400mA per channel, 120mΩ RDS(on), no internal charge pump - requires ≥4.5V supply for full enhancement | Limited to higher-voltage systems; lacks 2.7V operation and lower on-resistance | Select when supply >4.5V and thermal budget allows higher conduction loss |
| AP22654WM | Single-channel, 60mΩ, 2A rating, integrated soft-start - no OCx outputs or multi-channel integration | Requires four separate ICs and external logic for quad functionality; adds board area and BOM count | Select when per-channel flexibility and soft-start priority outweigh integration benefits |
Compared with TPS2044BD and AP22654WM, ST2044BDR uniquely delivers quad integration, 2.7V operability, and matched 80mΩ RDS(on) in one SO-16 package - reducing component count and simplifying layout for space-constrained industrial designs.
Availability
ST2044BDR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, USB hub power management, and embedded backplane power distribution requiring stable component supply and long-term lifecycle support.
Supply support for ST2044BDR 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, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The ST2044 belongs to ST's high-side power switch product line, engineered specifically for robust, multi-channel power distribution in harsh environments where capacitive inrush, short circuits, and thermal stress are routine operational conditions.
FAQ
What is the maximum continuous current per channel for ST2044BDR?
The ST2044BDR supports 500 mA continuous current per channel under recommended operating conditions (TA = 85°C, VI = 5.5 V). Its current-limit threshold is set at 0.9 A typical, with short-circuit output current ranging from 0.7 A to 1.3 A depending on supply voltage and temperature.
Does ST2044BDR require external components for gate driving?
No. ST2044BDR integrates a charge pump that fully enhances its internal N-channel MOSFETs from supplies as low as 2.7 V. No external capacitors, bootstrap diodes, or gate drivers are required - simplifying design and reducing bill-of-materials cost.
How does the 10ms fault-blanking feature work?
The 10ms deglitch circuit on each OCx output ignores transient overcurrent events shorter than ~2–10 ms (typical), preventing false fault assertions during hot-insertion or brief load surges. The blanking period is fixed and internally generated - no external timing components are needed.
Can ST2044BDR be used in automotive applications?
ST2044BDR is specified for −40°C to +85°C ambient operation and is not qualified as AEC-Q100 automotive grade. While it may function in non-safety-critical automotive subsystems, ST does not recommend or warrant its use in automotive applications unless explicitly validated by the end customer under their specific environmental and reliability requirements.
ST2044BDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 4
- Ratio - Input:Output:
- 2 x 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:
- 16-SO
ST2044BDR FAQ
1.How can I place an order for ST2044BDR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST2044BDR 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 ST2044BDR reliable?
The price and inventory of ST2044BDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST2044BDR is usually 5 days.
3.What payment methods are accepted for ST2044BDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST2044BDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST2044BDR?
ST2044BDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST2044BDR 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 ST2044BDR?
For technical support, including ST2044BDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST2044BDR requirements.
6.How does Aetrix verify that ST2044BDR is sourced from the original manufacturer or authorized distributors?
All ST2044BDR 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 ST2044BDR meets industry standards.
7.What is the process for return or replacement of ST2044BDR?
All ST2044BDR units undergo pre-shipment inspection (PSI). If there is an issue with ST2044BDR, 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 ST2044BDR part is unused and in its original packaging.
Return procedure for ST2044BDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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