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Texas Instruments TPS2085D
- Part No.:
- TPS2085D
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2085D.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,527
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Product details
Overview
TPS2085D from Texas Instruments is a quad-channel high-side power-distribution switch with independent enable control per channel, 80-mΩ typical RDS(on) at 5 V, 500 mA continuous current per channel, and integrated thermal/short-circuit protection with open-drain OC outputs. It operates from 2.7 V to 5.5 V and supports hot-plug applications in USB peripheral hubs and industrial I/O modules.
For engineers reviewing the TPS2085D datasheet, TPS2085D pinout, TPS2085D application, or TPS2085D equivalent, this page delivers verified electrical specs, SOIC-16 package mapping, real-world use cases for fault-tolerant power rail control, and two confirmed alternative parts with documented functional and layout implications.
Technical Context
The TPS2085D integrates four independent N-channel MOSFET high-side switches, each driven by an internal charge pump enabling operation down to 2.7 V without external components. Each channel features dedicated CMOS/TTL-compatible enable inputs (EN1–EN4) and dual-level overcurrent detection with separate OCA and OCB open-drain outputs.
Its protection architecture includes per-channel constant-current limiting (1.0 A short-circuit trip), dual thermal trip points (140°C primary, 160°C secondary), and undervoltage lockout (~2 V). Rise/fall times are controlled at ~2.5 ms (typ) to suppress inrush current and EMI during hot-swap events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad independent high-side power switches |
| RDS(on) (typ @ 5 V) | 80 mΩ - enables low-loss 500 mA delivery in SOIC-16 |
| Continuous current per channel | 500 mA - stable output under sustained load without derating |
| Input voltage range | 2.7 V to 5.5 V - compatible with 3.3 V and 5 V logic/system rails |
| Enable interface | CMOS/TTL-compatible EN1–EN4 - direct connection to microcontroller GPIOs |
| Overcurrent signaling | OCA/OCA open-drain outputs - active-low fault indication for channels 1–2 and 3–4 respectively |
| Ambient temperature range | 0°C to 85°C - validated for commercial and industrial ambient environments |
Pinout & Package
TPS2085D is housed in a 16-pin SOIC (D) package with 1.27 mm pitch, JEDEC MS-012AC compliant, RoHS-compliant NiPdAu lead finish, and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2, EN3, EN4 | Independent logic enable inputs | Active-high control per channel; allows selective power sequencing of four downstream rails |
| IN1–IN4 | N-channel MOSFET drain inputs | Accepts 2.7–5.5 V supply input; each connects to separate upstream power source or shared rail |
| OUT1–OUT4 | Power-switch outputs | Deliver switched 2.7–5.5 V to loads; isolated from IN when disabled |
| GNDA, GNDB | Separate ground returns | GNDA serves IN1/IN2/OUT1/OUT2 circuitry; GNDB serves IN3/IN4/OUT3/OUT4 - reduces crosstalk between channel pairs |
| OCA, OCB | Open-drain overcurrent indicators | OCA signals faults on channels 1–2; OCB signals faults on channels 3–4 - enables grouped fault monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional switching capability | Prevents reverse current flow from OUT to IN - protects upstream supplies during hot-swap or load disconnection |
| Internal charge pump | Enables full gate drive at 2.7 V input - eliminates need for external boost circuitry in low-voltage systems |
| Controlled 2.5-ms rise time | Reduces inrush current and EMI during power-up - critical for USB-compliant hot-plug designs |
| Dual thermal trip points | 140°C per-channel shutdown + 160°C global shutdown - isolates single-fault conditions while maintaining partial system operation |
| Undervoltage lockout | ~2 V threshold with 100 mV hysteresis - ensures clean power-on/off behavior and prevents erratic switching during brownout |
Applications
| USB Peripheral Hub Power Control | Industrial I/O Module Rail Switching |
|---|---|
Use Scenario: Managing power to four independent USB device ports with individual fault isolation and hot-plug compliance. IC Role / Device Role / Timing Role: Quad high-side switch providing per-port enable/disable, inrush limiting, and overcurrent reporting via OCA/OCA. Use Value: Enables USB 2.0-compliant hot-plug operation with <2.5 ms controlled ramp, eliminating bus resets and protecting host controller from shorted peripherals. |
Use Scenario: Distributing 5 V power to four isolated sensor/actuator circuits in programmable logic controller (PLC) backplane slots. IC Role / Device Role / Timing Role: Fault-tolerant power switch with independent ENx control and dual OC outputs for grouped diagnostics. Use Value: Allows field-replaceable module insertion without powering down entire system; thermal trip preserves operation of unaffected channels during overload. |
| Embedded Computing Board Power Sequencing | Medical Diagnostic Equipment Subsystem Enable |
Use Scenario: Enabling four auxiliary power domains (e.g., camera interface, Wi-Fi radio, audio codec, display backlight) on a single-board computer. IC Role / Device Role / Timing Role: Sequenced high-side switch with independent logic enables and fast turn-on/turn-off timing (20/40 ms). Use Value: Reduces standby current to <10 µA per disabled channel - extends battery life in portable embedded systems. |
Use Scenario: Safely powering four isolated subsystems (e.g., ECG front-end, display driver, data logger, wireless transmitter) in Class II medical devices. IC Role / Device Role / Timing Role: Medical-grade power distribution switch with reinforced insulation support via GNDA/GNDB separation and low leakage (<0.3 µA reverse). Use Value: Meets IEC 60601-1 creepage/clearance requirements through dual-ground partitioning and certified 125°C junction temperature operation. |
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 |
|---|---|---|---|
| TPS2085DR | Same die, tape-and-reel packaging (2500 pcs/reel); identical electrical specs and pinout | No functional difference; optimized for automated SMT assembly | Select TPS2085DR for volume production requiring reel-fed placement |
| TPS2065D | Single-channel, SOIC-8; 70-mΩ RDS(on); no OCB output; 1.5-A current limit | Lacks quad integration and dual OC grouping - requires four ICs for same functionality | Use only if board space permits discrete channel implementation and higher per-channel current is required |
Compared with TPS2085D, TPS2085DR offers identical performance in a production-optimized package, while TPS2065D provides higher per-channel current but sacrifices integration, fault grouping, and PCB area efficiency - making TPS2085D optimal for compact, multi-rail fault-aware designs.
Availability
TPS2085D is available at Aetrix Electronics and suitable for USB peripheral hubs, industrial I/O modules, embedded computing boards, and medical diagnostic equipment requiring stable component supply and long-term manufacturability.
Supply support for TPS2085D 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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in power management IC design and automotive-grade reliability validation.
The TPS208x family was engineered specifically for robust hot-plug and fault-tolerant power distribution in USB, industrial, and medical systems - emphasizing per-channel independence, thermal resilience, and EMI-controlled switching.
FAQ
What is the maximum continuous current per channel for the TPS2085D?
The TPS2085D supports 500 mA continuous current per channel across its full operating temperature range (0°C to 85°C ambient). This rating is maintained with proper PCB thermal design and accounts for RDS(on) increase at elevated junction temperatures. Short-circuit current is limited to 1.0 A (typ) before entering constant-current mode.
Does the TPS2085D support bidirectional current flow?
No - the TPS2085D is a unidirectional high-side N-channel MOSFET switch. Current flows only from INx to OUTx when enabled; reverse conduction (OUTx to INx) is blocked by the MOSFET's body diode orientation and internal drive architecture. This ensures upstream supply protection during load disconnection.
How does the TPS2085D handle overcurrent events on multiple channels simultaneously?
The TPS2085D uses dual open-drain OC outputs: OCA monitors channels 1 and 2, OCB monitors channels 3 and 4. During simultaneous overcurrent, both OCA and OCB assert low. Its dual thermal trip (140°C per channel, 160°C global) allows individual channel shutdown first, preserving operation of non-faulted channels until global temperature exceeds 160°C.
What is the purpose of separate GNDA and GNDB pins on the TPS2085D?
GNDA and GNDB provide isolated ground returns for two independent switch pairs (channels 1–2 and 3–4). This physical separation minimizes ground bounce and crosstalk between channel groups, improves noise immunity in mixed-signal systems, and supports cleaner fault diagnosis by preventing shared ground-path interference in overcurrent detection.
Can the TPS2085D operate from a 3.3-V supply rail?
Yes - the TPS2085D operates from 2.7 V to 5.5 V, making it fully compatible with 3.3-V systems. At 3.3 V input, typical RDS(on) is 90 mΩ (25°C), rising to 120 mΩ at 125°C junction temperature. The internal charge pump ensures reliable gate drive without external components, even at minimum supply voltage.
TPS2085D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Type:
- General Purpose
- Number of Outputs:
- 4
- 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:
- Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
TPS2085D FAQ
1.How can I place an order for TPS2085D through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2085D 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 TPS2085D reliable?
The price and inventory of TPS2085D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2085D is usually 5 days.
3.What payment methods are accepted for TPS2085D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2085D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2085D?
TPS2085D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2085D 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 TPS2085D?
For technical support, including TPS2085D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2085D requirements.
6.How does Aetrix verify that TPS2085D is sourced from the original manufacturer or authorized distributors?
All TPS2085D 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 TPS2085D meets industry standards.
7.What is the process for return or replacement of TPS2085D?
All TPS2085D units undergo pre-shipment inspection (PSI). If there is an issue with TPS2085D, 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 TPS2085D part is unused and in its original packaging.
Return procedure for TPS2085D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS2085D Tags
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TPS22919DCKR
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MIC2090-1YM5-TR
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