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Texas Instruments TPS2231MRGPR-1
- Part No.:
- TPS2231MRGPR-1
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
TPS2231MRGPR-1.pdf
- Description:
- IC PWR SWITCH 1:1 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,306
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Product details
Overview
TPS2231MRGPR-1 from Texas Instruments is a single-slot ExpressCard™ power interface switch that distributes and regulates 3.3 V, 1.5 V, and AUX power rails to ExpressCard|34/|54 sockets with integrated current limiting, thermal protection, and undervoltage lockout. It supports notebook computers and desktop systems requiring compliant hot-plug power sequencing for PCI Express and USB-based ExpressCard modules.
For engineers reviewing the TPS2231MRGPR-1 datasheet, TPS2231MRGPR-1 pinout, TPS2231MRGPR-1 application, or TPS2231MRGPR-1 equivalent, key selection criteria include its 24-pin PowerPAD™ HTSSOP package, dual-rail (3.3V/1.5V) + AUX output capability, 1.3 A / 650 mA / 275 mA continuous output current ratings, ExpressCard™ compliance, and integrated PERST/RCLKEN timing control logic.
Technical Context
The TPS2231MRGPR-1 implements three independent MOSFET power switches - one each for 3.3VIN→3.3VOUT, 1.5VIN→1.5VOUT, and AUXIN→AUXOUT - each with dedicated current-sense circuitry, thermal shutdown (155–165°C trip), and UVLO (2.6–2.9 V for 3.3VIN/AUXIN; 1.0–1.25 V for 1.5VIN). Its control logic interprets CPPE/CPUSB, SHDN, STBY, and SYSRST to manage power states including Off, Shutdown, No Card, Standby, and Card Inserted.
It features open-drain OC fault reporting, active-low PERST with programmable delay (500 ns assertion, 4–20 ms de-assertion), and bidirectional RCLKEN (output during power-up, input for host-controlled reset timing). All outputs support soft-start via controlled rise/fall times (0.1–6 ms) and discharge FETs activated during card removal or shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Rails | 3.3 VOUT (1.3 A max), 1.5 VOUT (650 mA max), AUXOUT (275 mA max) - independently switched, current-limited outputs meeting ExpressCard™ voltage tolerance and sequencing requirements |
| Input Voltage Range | 3.3VIN: 3.0–3.6 V; 1.5VIN: 1.35–1.65 V; AUXIN: 3.0–3.6 V - strict regulation window ensures reliable rail enablement per ExpressCard™ spec |
| Power Switch RDS(on) | 3.3V path: 45 mΩ (TJ = 25°C); 1.5V path: 46 mΩ; AUX path: 120 mΩ - low conduction loss enables high-efficiency power delivery at full rated load |
| Thermal Protection | 155–165°C overtemperature trip with 10°C hysteresis - prevents damage during sustained overload or poor PCB thermal design |
| PERST Timing | 500 ns assertion delay on rail drop; 4–20 ms de-assertion after RCLKEN release - satisfies ExpressCard™ power-good timing windows for module reset synchronization |
| Operating Temperature | –40°C to +85°C ambient - qualified for industrial and mobile computing environments with extended thermal cycling |
| Package | 24-pin PowerPAD™ HTSSOP (PWP) - thermally enhanced package with exposed die pad for efficient heat dissipation in space-constrained laptop designs |
Pinout & Package
TPS2231MRGPR-1 uses a 24-pin PowerPAD™ HTSSOP (PWP) package with an exposed thermal pad. Pin 1 is located at top-left corner (marking dot adjacent), and pin numbering proceeds counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SYSRST | Active-low system reset input - forces PERST assertion without disrupting power rails; internally pulled up to AUXIN |
| 2 | SHDN | Active-low shutdown input - disables all outputs and activates discharge FETs; internal AUXIN pullup |
| 3 | STBY | Active-low standby input - turns off 3.3V/1.5V outputs while maintaining AUXOUT; internal AUXIN pullup |
| 5,6 | 3.3VIN | 3.3-V input supply - powers 3.3VOUT rail; requires ≥3.0 V to enable switching |
| 7,8 | 3.3VOUT | Switched 3.3-V output - delivers regulated 3.3 V to ExpressCard slot when enabled; includes discharge FET |
| 9 | PERST | Active-low power-good/reset output - asserted when any output falls out of tolerance; timing-critical for ExpressCard™ compliance |
| 11 | CPUSB | USB card-present input - low indicates USB-based ExpressCard insertion; internal AUXIN pullup |
| 12 | CPPE | PCIe card-present input - low indicates PCIe-based ExpressCard insertion; internal AUXIN pullup |
| 14 | AUXOUT | Switched AUX output - provides auxiliary power (typically 3.3 V) to card; remains active in Standby mode |
| 15 | AUXIN | AUX input supply - powers chip logic and AUXOUT; required for all functions; UVLO threshold 2.6–2.9 V |
| 16,17 | 1.5VIN | 1.5-V input supply - powers 1.5VOUT rail; UVLO threshold 1.0–1.25 V |
| 18,19 | 1.5VOUT | Switched 1.5-V output - delivers regulated 1.5 V to ExpressCard slot; includes discharge FET |
| 22 | RCLKEN | Bidirectional reference clock enable - open-drain output (power-good signal) or input (host-controlled PERST timing gate) |
| 23 | OC | Open-drain overcurrent status - low during any rail overcurrent event; deglitched with 6–20 ms filter |
| 11 | GND | Ground reference - common return for all supplies and signals; connects to exposed PowerPAD |
Key Features
| Feature | Design Value |
|---|---|
| ExpressCard™ Compliance | Fully satisfies ExpressCard|34/|54 Implementation Guidelines, Compliance Checklists, and WAKE function support - eliminates need for external timing or sequencing logic |
| Triple Independent Power Switching | Simultaneous 3.3 V, 1.5 V, and AUX rail control with individual current limiting (1.3 A / 650 mA / 275 mA) - enables single-chip power management for dual-interface cards |
| Integrated Fault Protection | Short-circuit detection with 43–140 µs response time, thermal shutdown (155–165°C), and UVLO on all inputs - reduces BOM count and improves system reliability |
| Smart Power Sequencing Logic | Hardware-state machine managing Off/Shutdown/No Card/Standby/Card Inserted modes via CPPE/CPUSB/SHDN/STBY/SYSRST - ensures correct rail enable/disable order per ExpressCard™ spec |
| Thermally Optimized Package | 24-pin PowerPAD™ HTSSOP with soldered thermal pad - achieves 3153 mW power rating at TA = 25°C, enabling compact laptop motherboard layouts |
Applications
| Notebook Computers | Desktop Computers |
|---|---|
Use Scenario: Integrated ExpressCard slot in ultrabook chassis with space-constrained PCB layout and thermal limits. IC Role / Device Role / Timing Role: Primary power interface switch delivering sequenced 3.3 V, 1.5 V, and AUX power to ExpressCard|34 slot with PERST/RCLKEN timing alignment. Use Value: Eliminates discrete MOSFETs, sense resistors, and timing ICs - reduces solution size by >40% and simplifies ExpressCard™ certification testing. |
Use Scenario: Desktop motherboard supporting ExpressCard|54 expansion via front-panel or riser slot. IC Role / Device Role / Timing Role: Hot-plug power controller managing card insertion/removal events, WAKE signaling, and fault isolation across all three rails. Use Value: Enables automatic rail disable on card removal and fast recovery on reinsertion - improves user experience and prevents bus contention. |
| Personal Digital Assistants (PDAs) | Digital Cameras |
Use Scenario: High-reliability PDA with field-upgradable ExpressCard-based wireless modem or GPS module. IC Role / Device Role / Timing Role: Fault-tolerant power distributor with OC reporting and thermal protection - critical for battery-powered operation. Use Value: Prevents brownouts during modem transmit bursts via fast overcurrent response (<150 µs) and maintains AUX rail during 3.3V/1.5V standby. |
Use Scenario: Prosumer digital camera with ExpressCard slot for high-speed storage expansion (e.g., CFast-to-ExpressCard adapter). IC Role / Device Role / Timing Role: Sequenced power enabler ensuring 3.3 V and 1.5 V rails stabilize before PERST de-assertion - avoids storage controller initialization failure. Use Value: Guarantees <4 ms PERST de-assertion delay after RCLKEN release - meets CFast timing requirements for reliable enumeration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ExpressCard™ power interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2231PWPR | Same functionality and pinout, but in 20-pin TSSOP (PW) package - higher thermal resistance (704 mW vs 3153 mW at 25°C) | Limited to lower-power or better-cooled designs; not suitable for sustained 1.3 A 3.3VOUT loads without derating | Select TPS2231PWPR only if board layout constraints prohibit PowerPAD™ HTSSOP or thermal margin exceeds 20°C |
| TPS2236DAPR | Dual-slot ExpressCard™ switch in 32-pin PowerPAD™ HTSSOP - supports two independent slots with separate CPPE/CPUSB/PERST per slot | Required for motherboards with dual ExpressCard|34/|54 slots; incompatible pinout and control logic for single-slot use | Choose TPS2236DAPR only when expanding to dual-slot architecture - not a drop-in replacement for TPS2231MRGPR-1 |
Compared with TPS2231PWPR, TPS2231MRGPR-1 delivers 4.5× higher thermal performance and supports full-rated 1.3 A output continuously; compared with TPS2236DAPR, it offers optimized cost and footprint for single-slot implementations without redundant channel logic.
Availability
TPS2231MRGPR-1 is available at Aetrix Electronics and suitable for notebook computers, desktop computers, personal digital assistants (PDAs), and digital cameras requiring stable component supply and ExpressCard™-compliant power sequencing.
Supply support for TPS2231MRGPR-1 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 over 50 years of innovation in power management ICs.
The TPS2231MRGPR-1 belongs to TI's ExpressCard™ power interface product line, designed specifically to simplify compliance and reduce design risk for portable and desktop systems implementing ExpressCard|34 or ExpressCard|54 expansion slots.
FAQ
What is the primary function of the TPS2231MRGPR-1 in an ExpressCard™ system?
The TPS2231MRGPR-1 serves as the dedicated power interface switch for single-slot ExpressCard™ systems, distributing and sequencing 3.3 V, 1.5 V, and AUX power rails to the card socket while enforcing ExpressCard™ timing, fault protection, and hot-plug requirements. It replaces discrete MOSFETs and control logic with a fully integrated solution that manages PERST, RCLKEN, and OC signals in hardware.
How does the TPS2231MRGPR-1 handle overcurrent conditions on its output rails?
The TPS2231MRGPR-1 monitors each output rail (3.3VOUT, 1.5VOUT, AUXOUT) using integrated current-sense circuitry. Upon detecting an overcurrent event, it asserts the open-drain OC pin low after a 6–20 ms deglitch delay. The affected rail is immediately current-limited to its steady-state short-circuit value (e.g., 2.0 A for 3.3VOUT), preventing damage while maintaining system visibility via OC status.
Can the TPS2231MRGPR-1 be used in dual-slot ExpressCard™ designs?
No - the TPS2231MRGPR-1 is explicitly designed for single-slot ExpressCard|34 or ExpressCard|54 implementations. Dual-slot systems require the TPS2236DAPR, which integrates two independent power switch channels with separate CPPE/CPUSB, PERST, and OC signals per slot. Using TPS2231MRGPR-1 in a dual-slot configuration would violate ExpressCard™ electrical and timing specifications.
What is the role of the RCLKEN pin on the TPS2231MRGPR-1, and how is it used?
RCLKEN on the TPS2231MRGPR-1 is a bidirectional pin: as an output, it transitions high after all rails stabilize, triggering the internal PERST de-assertion timer; as an input, holding it low delays PERST de-assertion - allowing the host to synchronize clock enable with system readiness. It must never be driven high externally due to its internal discharge FET structure.
Does the TPS2231MRGPR-1 support both PCI Express and USB-based ExpressCard™ modules?
Yes - the TPS2231MRGPR-1 supports both interface types via dedicated CPPE (Card Present PCIe) and CPUSB (Card Present USB) inputs. These TTL-compatible pins detect card insertion and determine the appropriate power-up sequence and rail activation profile. The device automatically configures its behavior based on which input goes low, satisfying ExpressCard™ requirements for either protocol.
TPS2231MRGPR-1 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)
TPS2231MRGPR-1 FAQ
1.How can I place an order for TPS2231MRGPR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2231MRGPR-1 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 TPS2231MRGPR-1 reliable?
The price and inventory of TPS2231MRGPR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2231MRGPR-1 is usually 5 days.
3.What payment methods are accepted for TPS2231MRGPR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2231MRGPR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2231MRGPR-1?
TPS2231MRGPR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2231MRGPR-1 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 TPS2231MRGPR-1?
For technical support, including TPS2231MRGPR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2231MRGPR-1 requirements.
6.How does Aetrix verify that TPS2231MRGPR-1 is sourced from the original manufacturer or authorized distributors?
All TPS2231MRGPR-1 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 TPS2231MRGPR-1 meets industry standards.
7.What is the process for return or replacement of TPS2231MRGPR-1?
All TPS2231MRGPR-1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS2231MRGPR-1, 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 TPS2231MRGPR-1 part is unused and in its original packaging.
Return procedure for TPS2231MRGPR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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