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STMicroelectronics ST2044BD
- Part No.:
- ST2044BD
- Manufacturer:
- STMicroelectronics
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST2044BD.pdf
- Description:
- IC PWR SWTCH N-CHAN 2 X 1:2 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,661
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Product details
Overview
ST2044BD 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 systems for industrial I/O modules and embedded controllers handling hot-pluggable peripherals.
For engineers reviewing the ST2044BD datasheet, ST2044BD pinout, ST2044BD application, or ST2044BD 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 ST2044BD 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 inputs and OCx fault indicators.
Current limiting engages at 0.9A typical (0.7–1.3A range), entering constant-current mode during overloads; thermal shutdown activates when junction temperature exceeds safe limits, with automatic recovery upon cooling. Undervoltage lockout prevents operation below ~2.5V with 100mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RDS(on) | 80 mΩ max at 5V/0.5A - ensures low conduction loss and <125mW dissipation per channel at full load |
| Continuous current | 500 mA per channel - supports stable powering of moderate-capacity loads like sensors and interface ICs |
| Current limit threshold | 0.9 A typical - provides robust short-circuit protection while avoiding nuisance tripping on capacitive inrush |
| Rise time | 2.5 ms typical - limits di/dt to suppress voltage spikes and EMI during turn-on |
| Standby supply current | 20 µA max - enables ultra-low-power system sleep states without disabling power rails |
| Fault blanking | 10 ms - suppresses false OC_N assertions during hot-insertion transients or brief overcurrent events |
| Operating voltage | 2.7 V to 5.5 V - compatible with 3.3V and 5V logic domains and mixed-supply systems |
Pinout & Package
ST2044BD is housed in a 16-pin SOIC (SO-16) package with standard 1.27 mm pitch, ECOPACK® lead-free finish, and thermal pad design supporting up to 125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GNDA (Pin 1) | Analog ground reference | Provides low-noise return path for internal bias circuitry and ENx inputs |
| IN1–IN2 (Pins 2,6) | Power input rails | Accepts 2.7–5.5V supplies feeding respective output channels; not internally connected |
| EN1–EN4 (Pins 3,4,7,8) | Active-low enable inputs | CMOS/TTL-compatible; logic low enables corresponding IN→OUT switch; high-Z when disabled |
| OUT1–OUT4 (Pins 15,14,11,10) | Switched power outputs | Deliver controlled current to downstream loads; each isolated and independently current-limited |
| OC1–OC4 (Pins 16,13,12,9) | Active-low overcurrent flags | Open-drain outputs pulled low during current-limit or thermal shutdown; require external pull-up |
| GNDB (Pin 5) | Power ground return | Carries switched load currents; must be low-impedance connection to minimize RDS(on) error |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge pump | Enables full N-MOSFET enhancement from 2.7V supply - no external bootstrap components required |
| Per-channel fault reporting | Dedicated OCx pins allow precise identification of failed channel without system-level polling |
| Independent thermal protection | Each channel shuts down autonomously during local overheating - prevents single-point failure propagation |
| Input voltage hysteresis | 100 mV UVLO hysteresis avoids oscillation near undervoltage threshold during brownout conditions |
| Low standby current | 20 µA max enables long-term battery-backed operation without compromising rail availability |
Applications
| Industrial PLC I/O Modules | Embedded Controller Power Management |
|---|---|
Use Scenario: Distributing power to multiple field-connected sensors and actuators subject to cable shorts and ESD. IC Role / Device Role / Timing Role: High-side switch providing per-channel current limiting, fault isolation, and hot-swap capability. Use Value: Prevents system-wide shutdown during localized faults and eliminates need for discrete fuses or resettable PTCs. | Use Scenario: Managing power to peripheral interfaces (USB, RS-485, CAN transceivers) in fanless edge gateways. IC Role / Device Role / Timing Role: Quad-channel load switch enabling software-controlled rail sequencing and dynamic power gating. Use Value: Reduces idle power by >95% per disabled rail and supports deterministic wake-up via OCx interrupt signaling. |
| Test Equipment Power Rails | Medical Diagnostic Subsystems |
Use Scenario: Supplying calibrated voltage rails to DUT interfaces where accidental shorts must not disrupt main controller. IC Role / Device Role / Timing Role: Fault-tolerant power switch with 10ms deglitching to ignore probe contact bounce during test setup. Use Value: Ensures measurement continuity during transient overloads and simplifies automated test sequence logic. | Use Scenario: Powering isolated analog front-end modules in portable ultrasound or patient monitoring devices. IC Role / Device Role / Timing Role: Safety-reinforced power distributor with thermal shutdown and leakage-limited OFF-state (<20µA). Use Value: Meets IEC 60601-1 creepage/clearance requirements and supports battery runtime extension via rail disable. |
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 |
|---|---|---|---|
| TPS2044BDR | Lower RDS(on) (50mΩ), but fixed 1.5A current limit and no OCx per channel - single global fault flag only | Less granular fault diagnosis; suitable for non-critical parallel loads where channel-level isolation is unnecessary | Select when lower conduction loss outweighs need for per-channel fault visibility |
| AP22654WM6-7 | Single-channel device (quad requires four units); higher RDS(on) (120mΩ); no integrated charge pump - requires ≥4.5V supply | Higher board area and BOM count; limited to 5V-only systems; lacks thermal foldback behavior | Select only if SO-16 footprint is not required and discrete layout offers better thermal partitioning |
Compared with TPS2044BDR and AP22654WM6-7, ST2044BD uniquely delivers per-channel OCx reporting, 2.7V operation via internal charge pump, and matched thermal response across all four switches - critical for space-constrained, multi-rail industrial designs requiring deterministic fault containment.
Availability
ST2044BD is available at Aetrix Electronics and suitable for industrial PLC I/O modules, embedded controller power management, and medical diagnostic subsystems requiring stable component supply and long-term lifecycle support.
Supply support for ST2044BD 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 microcontrollers, power management ICs, sensors, and automotive-grade components.
The ST2044 belongs to ST's high-side power switch product line, engineered specifically for robust, multi-channel power distribution in harsh industrial environments with frequent hot-plug events and heavy capacitive loads.
FAQ
What is the maximum junction temperature and thermal shutdown behavior of ST2044BD?
The ST2044BD features thermal shutdown at approximately 150°C junction temperature. When triggered, the affected channel turns off completely and remains latched off until junction temperature drops by ~20°C, enabling automatic recovery without external reset. This protects against sustained overload or poor PCB heatsinking while maintaining functionality of unaffected channels.
Can ST2044BD drive capacitive loads up to 1000 µF without oscillation or damage?
Yes - the internal charge pump and controlled 2.5 ms rise time limit inrush di/dt, allowing safe switching of up to 1000 µF loads at 5V. The device enters constant-current mode during initial charge, preventing voltage droop and gate oscillation. Verified per Figure 3 test circuit in the datasheet with RL = 10 Ω and CL = 1000 µF.
How does the 10ms OC_N fault-blanking period interact with hot-swap insertion transients?
The 10ms deglitch timer starts on first OC assertion and ignores subsequent overcurrent events within that window. During hot-swap, this prevents false OC_N activation caused by initial capacitive inrush (typically <5ms). After blanking expires, real faults trigger immediate OC_N assertion, ensuring reliable protection without compromising plug-in usability.
Is ST2044BD compliant with RoHS and REACH, and what is its moisture sensitivity level?
Yes - ST2044BD carries ECOPACK® certification, confirming RoHS-compliant lead-free terminations and adherence to REACH SVHC thresholds. Its moisture sensitivity level is MSL3 (floor life 168 hours at 30°C/60% RH), per JEDEC J-STD-020. The SO-16 package requires standard reflow profile with peak temperature ≤260°C.
ST2044BD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- 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
ST2044BD FAQ
1.How can I place an order for ST2044BD through Aetrix?
Please submit a Request for Quotation (RFQ) for ST2044BD 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 ST2044BD reliable?
The price and inventory of ST2044BD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST2044BD is usually 5 days.
3.What payment methods are accepted for ST2044BD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST2044BD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST2044BD?
ST2044BD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST2044BD 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 ST2044BD?
For technical support, including ST2044BD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST2044BD requirements.
6.How does Aetrix verify that ST2044BD is sourced from the original manufacturer or authorized distributors?
All ST2044BD 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 ST2044BD meets industry standards.
7.What is the process for return or replacement of ST2044BD?
All ST2044BD units undergo pre-shipment inspection (PSI). If there is an issue with ST2044BD, 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 ST2044BD part is unused and in its original packaging.
Return procedure for ST2044BD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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