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Texas Instruments TPS2231MRGPT
- Part No.:
- TPS2231MRGPT
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
TPS2231MRGPT.pdf
- Description:
- IC PWR SWITCH 1:1 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,410
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Product details
Overview
TPS2231MRGPT from Texas Instruments is a single-slot ExpressCard™ power interface switch IC that distributes and regulates 3.3 V, 1.5 V, and AUX power rails to ExpressCard|34/|54 sockets with integrated current limiting, thermal shutdown, and undervoltage lockout. It supports notebook computers and desktop systems requiring compliant hot-plug power sequencing and card presence detection via CPPE/CPUSB inputs.
For engineers reviewing the TPS2231MRGPT datasheet, TPS2231MRGPT pinout, TPS2231MRGPT application, or TPS2231MRGPT equivalent, this device delivers precise rail enable/disable timing, PERST/RCLKEN power-good signaling, and fault-safe discharge FET control for ExpressCard host designs meeting PCI Express and USB card interoperability requirements.
Technical Context
The TPS2231MRGPT implements three independent MOSFET power switches (3.3VIN→3.3VOUT, 1.5VIN→1.5VOUT, AUXIN→AUXOUT) with per-rail current-limit sensing, thermal foldback, and UVLO thresholds (3.3VIN: 2.6–2.9 V; 1.5VIN: 1.0–1.25 V; AUXIN: 2.6–2.9 V). Its control logic interprets CPPE/CPUSB, SHDN, STBY, and SYSRST to manage power states including No Card, Card Inserted, Standby, and Shutdown.
It generates synchronized power-good signals: RCLKEN (open-drain, no delay) releases upon all outputs reaching tolerance, triggering a timed PERST de-assertion; PERST (push-pull) asserts during any rail undervoltage or SYSRST event and serves as both reset signal and compliance-mandated power-good indicator per ExpressCard specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | –0.3 V to 6 V per rail (3.3VIN, 1.5VIN, AUXIN); enables robust handling of transient overshoot and brown-in conditions |
| Continuous Output Current | 1.3 A @ 3.3VOUT, 650 mA @ 1.5VOUT, 275 mA @ AUXOUT; supports full ExpressCard load profiles without external current boosting |
| On-Resistance (rDS(on)) | 45 mΩ (3.3V), 46 mΩ (1.5V), 120 mΩ (AUX) at TJ = 25°C; minimizes voltage drop and thermal dissipation under full load |
| Operating Temperature | –40°C to +85°C ambient; validated for use in portable and desktop host platforms with passive cooling |
| UVLO Hysteresis | 100 mV; prevents oscillation during marginal input voltage conditions and ensures clean power-up sequencing |
| PERST Assertion Delay | 500 ns from output voltage fall; meets ExpressCard timing requirement for immediate fault response |
| Thermal Shutdown Trip | 155–165°C junction temperature with 10°C hysteresis; protects against sustained overcurrent or poor PCB thermal design |
Pinout & Package
TPS2231MRGPT is housed in a 24-pin PowerPAD™ HTSSOP (PWP) package with exposed thermal pad for enhanced heat dissipation. Pin 1 is located at top-left corner (marking dot adjacent), and pin numbering proceeds counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYSRST | System Reset Input | Active-low host-initiated warm/cold reset; forces immediate PERST assertion without disrupting power rails |
| SHDN | Shutdown Input | Active-low global disable; turns off all power switches and activates discharge FETs for safe rail collapse |
| STBY | Standby Input | Active-low mode control; disables 3.3V/1.5V outputs while retaining AUXOUT for low-power card maintenance |
| 3.3VIN / 1.5VIN / AUXIN | Power Inputs | Independent supply inputs; each enables its corresponding output only when above respective UVLO threshold |
| 3.3VOUT / 1.5VOUT / AUXOUT | Switched Outputs | High-side switched rails delivered to ExpressCard socket; include internal discharge FETs for rapid rail discharge on removal |
| CPPE / CPUSB | Card Presence Inputs | Open-drain inputs pulled up to AUXIN; detect PCI Express or USB card insertion to initiate power-on sequencing |
| RCLKEN | I/O Power-Good Signal | Open-drain output (or input if externally driven low); indicates all rails in tolerance and gates PERST de-assertion timer |
| PERST | Power-Good / Reset Output | Push-pull output asserted low during any rail fault or SYSRST; required by ExpressCard standard for module reset |
| OC | Overcurrent Status Output | Open-drain fault flag; pulls low during sustained overcurrent on any rail after 6–20 ms deglitch window |
| GND | Ground Reference | Common return path for all power and logic circuits; must be connected to low-impedance system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| ExpressCard™ Compliance | Fully satisfies ExpressCard|34/|54 Implementation Guidelines and Compliance Checklists for power management |
| Triple Independent Power Switches | Enables selective enable/disable of 3.3 V, 1.5 V, and AUX rails-critical for mixed-interface (PCIe/USB) card support |
| Integrated Fault Protection | Combines per-rail current limiting, thermal shutdown, and UVLO to prevent damage during short-circuit, overtemp, or brownout |
| Programmable Power Sequencing | Uses CPPE/CPUSB, SHDN, STBY, and SYSRST to implement five defined power states (Off, Shutdown, No Card, Standby, Card Inserted) |
| Safe Hot-Plug Operation | Discharge FETs automatically activate on card removal or SHDN assertion, ensuring rapid rail collapse below 100 µs |
Applications
| ExpressCard Host Controller | Notebook Computer Expansion Slot |
|---|---|
Use Scenario: Integrating ExpressCard|34/|54 slot into Intel chipset-based laptop motherboard with PCIe x1 and USB 2.0 connectivity. IC Role / Device Role / Timing Role: Primary power interface switch managing rail delivery, fault reporting (OC), and ExpressCard-compliant PERST/RCLKEN signaling. Use Value: Eliminates need for discrete MOSFETs, current-sense resistors, and timing RC networks-reducing BOM count by ≥12 components. |
Use Scenario: Adding hot-pluggable I/O expansion (e.g., SD card reader, WWAN modem) to ultrabook platform with strict thermal envelope. IC Role / Device Role / Timing Role: Provides thermally efficient 3.3 V/1.5 V/AUX power with <1.3 A capability and 45 mΩ rDS(on) to minimize self-heating. Use Value: Enables full ExpressCard functionality within 5 mm² PCB area and <1.5 W total dissipation at full load. |
| Desktop PC ExpressCard Adapter | Digital Camera Docking Station |
Use Scenario: PCIe-to-ExpressCard bridge card for desktop tower enabling legacy ExpressCard peripherals (e.g., FireWire, eSATA). IC Role / Device Role / Timing Role: Host-side power manager coordinating with bridge ASIC to sequence 3.3 V before 1.5 V and assert PERST only after stable RCLKEN. Use Value: Guarantees <500 ns PERST assertion on rail fault-meeting ExpressCard spec for reliable module reset under transient overload. |
Use Scenario: High-speed photo transfer dock supporting ExpressCard-based CFast 2.0 readers in professional camera workflow. IC Role / Device Role / Timing Role: Dual-role power controller: supplies AUX for card detection pre-insertion, then enables 3.3 V/1.5 V only after CPPE/CPUSB confirmation. Use Value: Prevents backfeeding and inrush surges during hot insertion-ensuring zero data corruption during card swap. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ExpressCard power interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2231PW | 20-pin TSSOP package; higher thermal resistance (704 mW @ TA=25°C vs. 3153 mW for PWP); identical electrical specs | Limited to lower-power or space-constrained designs where thermal headroom >1.5 W is unavailable | Select TPS2231PW only when board layout prohibits PowerPAD soldering or thermal vias cannot be implemented. |
| TPS2236DAP | Dual-slot ExpressCard controller (32-pin HTSSOP); provides two independent 3.3V/1.5V/AUX channels with separate PERST/RCLKEN per slot | Required for systems supporting simultaneous ExpressCard|34 + |54 or dual |34 slots | Choose TPS2236DAP only when dual-slot operation is mandatory; not a drop-in replacement for TPS2231MRGPT. |
Compared with TPS2231PW, TPS2231MRGPT delivers 4.5× higher thermal power rating due to PowerPAD packaging-enabling sustained 1.3 A loads without derating. Compared with TPS2236DAP, it offers half the channel count and pin count, reducing complexity and cost in single-slot implementations.
Availability
TPS2231MRGPT is available at Aetrix Electronics and suitable for notebook computers, desktop expansion adapters, and digital camera docking stations requiring stable component supply, long-term lifecycle support, and ExpressCard compliance assurance.
Supply support for TPS2231MRGPT 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 solutions, with decades of expertise in power management ICs for computing and communications infrastructure.
The TPS2231MRGPT belongs to TI's ExpressCard power interface product line, engineered specifically to meet the stringent sequencing, protection, and signaling requirements of PCI-SIG and USB-IF certified host systems.
FAQ
What is the primary function of the TPS2231MRGPT in an ExpressCard system?
The TPS2231MRGPT serves as the dedicated power interface switch for single-slot ExpressCard|34 or |54 hosts. It manages the delivery, sequencing, and protection of three critical voltage rails-3.3 V, 1.5 V, and AUX-to the card socket. The TPS2231MRGPT integrates current limiting, thermal shutdown, undervoltage lockout, and ExpressCard-compliant PERST/RCLKEN signaling to ensure safe, standards-compliant hot-plug operation.
How does the TPS2231MRGPT handle card insertion and removal events?
The TPS2231MRGPT detects card presence via CPPE and CPUSB inputs, which are internally pulled up to AUXIN. When either signal goes low, it initiates the Card Inserted state, enabling 3.3VOUT and 1.5VOUT. On removal, discharge FETs rapidly pull down all outputs within microseconds. The TPS2231MRGPT also asserts PERST during removal to signal the card to enter reset-fully complying with ExpressCard mechanical and electrical specifications.
What are the key differences between the TPS2231MRGPT and the TPS2231PW variant?
The TPS2231MRGPT uses a 24-pin PowerPAD™ HTSSOP (PWP) package with an exposed thermal pad, while the TPS2231PW uses a 20-pin TSSOP (PW) package without thermal enhancement. This gives the TPS2231MRGPT a 4.5× higher power dissipation rating (3153 mW vs. 704 mW at TA = 25°C), enabling full 1.3 A 3.3VOUT operation without thermal derating. Both share identical electrical specifications and pin functions.
Can the TPS2231MRGPT be used in dual-slot ExpressCard systems?
No, the TPS2231MRGPT is designed exclusively for single-slot ExpressCard|34 or |54 host applications. Dual-slot systems require the TPS2236DAP, which integrates two independent power switch channels with separate PERST, RCLKEN, and OC signals per slot. Using the TPS2231MRGPT in a dual-slot configuration would violate ExpressCard timing and signaling requirements and lacks necessary channel isolation.
What protection features does the TPS2231MRGPT provide against overcurrent and thermal faults?
The TPS2231MRGPT provides per-rail overcurrent protection with adjustable trip points (1.3 A for 3.3VOUT, 650 mA for 1.5VOUT, 275 mA for AUXOUT) and a 6–20 ms deglitch window to reject transient spikes. It also includes thermal shutdown with a trip range of 155–165°C and 10°C hysteresis. Both protections are fully integrated-no external components are needed-and faults are reported via the open-drain OC pin.
TPS2231MRGPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-VFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Type:
- ExpressCard™ Switch
- Number of Outputs:
- 3
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- -
- Interface:
- -
- Voltage - Load:
- 1.5V, 3.3V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 1.3A
- Rds On (Typ):
- 45mOhm
- Input Type:
- -
- Features:
- Power Good, Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
TPS2231MRGPT FAQ
1.How can I place an order for TPS2231MRGPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2231MRGPT 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 TPS2231MRGPT reliable?
The price and inventory of TPS2231MRGPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2231MRGPT is usually 5 days.
3.What payment methods are accepted for TPS2231MRGPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2231MRGPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2231MRGPT?
TPS2231MRGPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2231MRGPT 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 TPS2231MRGPT?
For technical support, including TPS2231MRGPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2231MRGPT requirements.
6.How does Aetrix verify that TPS2231MRGPT is sourced from the original manufacturer or authorized distributors?
All TPS2231MRGPT 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 TPS2231MRGPT meets industry standards.
7.What is the process for return or replacement of TPS2231MRGPT?
All TPS2231MRGPT units undergo pre-shipment inspection (PSI). If there is an issue with TPS2231MRGPT, 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 TPS2231MRGPT part is unused and in its original packaging.
Return procedure for TPS2231MRGPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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