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Texas Instruments TPS2042BD
- Part No.:
- TPS2042BD
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2042BD.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:2 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:753
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Product details
Overview
TPS2042BD from Texas Instruments is a dual-channel, current-limited power-distribution switch featuring two 70mΩ high-side N-channel MOSFETs, 500mA continuous output per channel, thermal and short-circuit protection, and operation from 2.7V to 5.5V. It serves as a smart load switch in USB-powered peripherals and embedded systems requiring controlled power sequencing and fault isolation.
For engineers reviewing the TPS2042BD datasheet, TPS2042BD pinout, TPS2042BD application, or TPS2042BD equivalent, key selection criteria include per-channel current limit (0.75A–1.25A), rise time (0.6ms typical), undervoltage lockout (2.0–2.6V), standby supply current (≤1μA per channel), and SOIC-8 package compatibility with industrial temperature range (–40°C to 85°C).
Technical Context
The TPS2042BD integrates an internal charge pump to drive the gate of each high-side MOSFET, enabling full enhancement down to 2.7V input while controlling rise/fall times to suppress inrush current. Each channel operates independently with dedicated enable (EN1/EN2) and overcurrent (OC1/OC2) pins.
Under overload, it enters constant-current limiting mode; sustained overloads trigger thermal shutdown at 135°C with 10°C hysteresis and automatic recovery. Undervoltage lockout prevents erratic switching below 2.0V, and deglitched OC outputs eliminate false fault reporting during power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 500mA per channel - supports USB-compliant downstream loads without external current sensing |
| rDS(on) | 70mΩ typical at 5V - minimizes conduction loss and self-heating under full load |
| Rise Time | 0.6ms typical - limits inrush di/dt into heavy capacitive loads (e.g., 100µF bus capacitance) |
| Input Voltage Range | 2.7V to 5.5V - compatible with single Li-ion, 3.3V, and 5V rail systems |
| Standby Supply Current | ≤1μA per channel - enables ultra-low-power sleep states in battery-backed systems |
| Current Limit Threshold | 0.75A min / 1.25A max - provides robust short-circuit protection with ±25% tolerance across temperature |
| Thermal Shutdown | 135°C trip, 125°C recovery - protects silicon integrity during sustained overload or poor PCB heatsinking |
Pinout & Package
TPS2042BD is housed in an 8-pin SOIC (D) package (4.90mm × 3.91mm body), with PowerPAD™ thermally enhanced bottom pad internally connected to GND for improved heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Common return path for power, logic, and thermal pad; must be solidly connected to PCB ground plane |
| IN | Power input | Single shared input rail for both channels; accepts 2.7V–5.5V with UVLO protection |
| EN1 | Channel 1 enable | Active-low logic input; pulls OUT1 high when low (logic 0), disables OUT1 when high (logic 1) |
| EN2 | Channel 2 enable | Active-low logic input; independent control of OUT2, synchronized with EN1 timing constraints |
| OC1 | Channel 1 fault flag | Open-drain active-low output; asserts low during overcurrent or thermal shutdown on OUT1 |
| OUT1 | Channel 1 switched output | High-side switched output; delivers up to 500mA with 70mΩ rDS(on) and controlled slew rate |
| OUT2 | Channel 2 switched output | Independent high-side output; identical electrical specs to OUT1, electrically isolated from OUT1 |
| OC2 | Channel 2 fault flag | Open-drain active-low output; asserts low only on faults affecting OUT2, decoupled from OC1 |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge pump | Enables full MOSFET enhancement from 2.7V input-no external components required for gate drive |
| Deglitched OC outputs | 4–15ms fault debounce window eliminates transient glitches during hot-plug or load transients |
| No OC glitch at power-up | Internal power-on reset ensures OC pins remain high until stable bias conditions are achieved |
| UL recognition (E169910) | Validated for end-equipment safety compliance in commercial and industrial applications |
| Thermal protection with hysteresis | 135°C shutdown + 10°C hysteresis prevents oscillation during marginal thermal conditions |
Applications
| USB Peripheral Power Switching | Industrial I/O Module Protection |
|---|---|
Use Scenario: Hot-pluggable USB devices (e.g., external HDD enclosures, docking stations) require controlled power delivery to prevent bus voltage droop and enumeration failure. IC Role / Device Role / Timing Role: Dual-channel high-side switch isolates VBUS from downstream loads; enables/disables power per port with independent fault reporting. Use Value: 0.6ms rise time limits inrush into 100µF+ bus capacitance; OC1/OC2 provide per-port fault visibility to host controller. | Use Scenario: Programmable logic controllers (PLCs) protect field I/O modules (e.g., solenoid drivers, sensor interfaces) against wiring faults and ESD-induced shorts. IC Role / Device Role / Timing Role: Acts as intelligent load switch between 5V backplane and modular I/O cards; responds to overcurrent within microseconds. Use Value: 70mΩ rDS(on) keeps power loss ≤175mW at 500mA; thermal shutdown prevents damage during sustained 2Ω short circuits. |
| Embedded System Power Sequencing | Point-of-Sale Terminal Power Management |
Use Scenario: Multi-rail embedded systems (e.g., ARM-based HMI panels) require staggered power-up of processor cores, memory, and peripherals to avoid peak current surges. IC Role / Device Role / Timing Role: Provides independent, logic-controlled enable paths for two critical subsystems (e.g., display backlight + SD card interface). Use Value: EN1/EN2 allow precise timing control via GPIO; <1μA standby current preserves battery life in always-on monitoring modes. | Use Scenario: Retail POS terminals integrate barcode scanners, receipt printers, and magnetic stripe readers-all sharing a common 5V supply but requiring individual fault containment. IC Role / Device Role / Timing Role: Dual-channel distribution switch replaces discrete FETs + sense resistors + comparators for cost and board space reduction. Use Value: UL recognition simplifies end-product safety certification; 500mA rating matches typical peripheral current draw without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel power-switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2052BD | Same pinout, same SOIC-8 package, but features active-high enable inputs (EN1/EN2 = high to enable) and higher current-limit threshold (1.55–2A) | Designed for ganged configuration support and higher-current loads; lacks UL recognition for ganged use | Select when system logic uses active-high control signals and requires >1A short-circuit trip level |
| TPS2042BDRB | SON-8 (3.0mm × 3.0mm) package with identical electrical specs; includes overcurrent trip threshold (1.55–2A) and enhanced thermal performance (RθJB = 14.2°C/W) | Targeted at space-constrained designs needing lower thermal resistance; supports ganged operation per UL file E169910 | Select for compact layouts requiring superior thermal management or ganged dual-channel operation |
Compared with TPS2042BD, TPS2052BD shifts enable polarity and raises current limit, while TPS2042BDRB retains identical functionality in a smaller, thermally optimized SON package-both alternatives maintain dual-channel independence but differ in control interface, trip accuracy, and thermal footprint.
Availability
TPS2042BD is available at Aetrix Electronics and suitable for USB peripheral power switching, industrial I/O module protection, and embedded system power sequencing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS2042BD 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
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS20xxB family is designed specifically for robust, low-risk power distribution in systems exposed to heavy capacitive loads and frequent short-circuit events-emphasizing reliability, fault visibility, and ease of integration.
FAQ
What is the maximum continuous output current per channel for the TPS2042BD?
The TPS2042BD supports 500mA continuous output current per channel under recommended operating conditions (TJ ≤ 125°C, VI(IN) = 2.7V to 5.5V). This rating is maintained across the full industrial temperature range (–40°C to 85°C) and accounts for thermal derating in typical SOIC-8 PCB layouts. The device enters current-limit mode if load exceeds the 0.75A–1.25A threshold.
Does the TPS2042BD require external components for gate drive or current limiting?
No, the TPS2042BD integrates a charge pump for high-side MOSFET gate drive and uses internal circuitry for accurate current limiting-no external resistors, capacitors, or sense elements are needed. Its 70mΩ rDS(on), 0.6ms rise time, and deglitched OC outputs are all self-contained, simplifying design and reducing bill-of-materials count.
How does the TPS2042BD handle short-circuit conditions?
When a short occurs on either OUT1 or OUT2, the TPS2042BD immediately limits output current to 0.75A–1.25A (typical 1A), holding the channel in constant-current mode. If the fault persists and junction temperature reaches 135°C, thermal shutdown disables the affected channel. OC1 or OC2 asserts low to signal the fault; recovery is automatic once temperature drops to 125°C.
What is the purpose of the deglitched OC outputs in the TPS2042BD?
The deglitched OC outputs in the TPS2042BD incorporate a 4–15ms internal filter to suppress false fault assertions caused by transient inrush currents, hot-plug events, or noise spikes. This ensures OC1 and OC2 only report sustained overcurrent or thermal faults-not momentary disturbances-improving system reliability and eliminating spurious host-controller interrupts.
Is the TPS2042BD UL-recognized, and for what configurations?
Yes, the TPS2042BD is UL Recognized under File Number E169910. This recognition explicitly covers its use in ganged configurations-where multiple TPS2042BD units share a common IN rail and coordinated enable logic-validating safety compliance for multi-channel power-distribution systems in commercial and industrial end equipment.
TPS2042BD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Switch Type:
- General Purpose
- Number of Outputs:
- 2
- 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):
- 70mOhm
- Input Type:
- Inverting
- Features:
- -
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS2042BD FAQ
1.How can I place an order for TPS2042BD through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2042BD 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 TPS2042BD reliable?
The price and inventory of TPS2042BD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2042BD is usually 5 days.
3.What payment methods are accepted for TPS2042BD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2042BD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2042BD?
TPS2042BD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2042BD 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 TPS2042BD?
For technical support, including TPS2042BD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2042BD requirements.
6.How does Aetrix verify that TPS2042BD is sourced from the original manufacturer or authorized distributors?
All TPS2042BD 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 TPS2042BD meets industry standards.
7.What is the process for return or replacement of TPS2042BD?
All TPS2042BD units undergo pre-shipment inspection (PSI). If there is an issue with TPS2042BD, 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 TPS2042BD part is unused and in its original packaging.
Return procedure for TPS2042BD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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