My Inquiry
My Account
Texas Instruments TPS2231MRGPR-3
- Part No.:
- TPS2231MRGPR-3
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
TPS2231MRGPR-3.pdf
- Description:
- IC PWR SWITCH 1:1 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,685
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS2231MRGPR-3 from Texas Instruments is a single-slot ExpressCard™ power interface switch IC that delivers and protects three regulated voltage rails-3.3 V, 1.5 V, and AUX-to ExpressCard|34/|54 sockets. It integrates current-limiting, thermal shutdown, undervoltage lockout (UVLO), and PERST/RCLKEN timing control. Designed for notebook and desktop host systems, it enables hot-plug power sequencing compliant with ExpressCard Implementation Guidelines.
For engineers reviewing the TPS2231MRGPR-3 datasheet, TPS2231MRGPR-3 pinout, TPS2231MRGPR-3 application, or TPS2231MRGPR-3 equivalent, key selection criteria include its 24-pin PowerPAD™ HTSSOP package, dual-rail current limits (1.3 A @ 3.3VOUT, 650 mA @ 1.5VOUT), integrated discharge FETs, ExpressCard-compliant PERST assertion/de-assertion timing, and support for WAKE functionality in low-power standby states.
Technical Context
The TPS2231MRGPR-3 implements a triple-channel analog power switch architecture with independent UVLO thresholds per input rail (3.3VIN: 2.6–2.9 V, 1.5VIN: 1.0–1.25 V, AUXIN: 2.6–2.9 V) and thermally compensated current limiting. Each output channel features internal MOSFETs with on-resistance of 45 mΩ (3.3V), 46 mΩ (1.5V), and 120 mΩ (AUX) at TJ = 25°C.
Its control logic supports five defined power states-OFF, Shutdown, No Card, Standby, and Card Inserted-managed via TTL-compatible inputs (SHDN, STBY, CPPE, CPUSB, SYSRST). RCLKEN serves as bidirectional reference clock enable with open-drain output behavior and host-controllable de-assertion delay for PERST synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Package | 24-pin PowerPAD™ HTSSOP (PWP), thermally enhanced for high-current switching |
| 3.3V Output Current Limit | 1.3 A continuous - supports full ExpressCard|34/|54 3.3-V bus load without external current sensing |
| 1.5V Output Current Limit | 650 mA continuous - meets ExpressCard AUX/1.5-V rail requirements with thermal derating to 120°C junction |
| AUX Output Current Limit | 275 mA continuous - powers card presence detection and auxiliary circuitry while enabling fast discharge |
| PERST Assertion Delay | 500 ns max from output voltage fall - ensures immediate reset signaling during rail collapse per ExpressCard spec |
| UVLO Hysteresis | 100 mV - prevents oscillation during marginal input voltage conditions across all three input rails |
| Operating Temperature | –40°C to +85°C ambient - qualified for industrial and mobile computing environments |
Pinout & Package
TPS2231MRGPR-3 uses the 24-pin PowerPAD™ HTSSOP (PWP) package with exposed thermal pad soldered to PCB ground plane for optimal thermal performance. 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; internally pulled up to AUXIN; forces PERST assertion without disrupting power rails |
| SHDN | Shutdown Input | Active-low global disable; activates discharge FETs on all outputs and disables all power switches |
| STBY | Standby Input | Active-low mode control; keeps AUXOUT active while disabling 3.3VOUT/1.5VOUT for low-power card retention |
| CPPE / CPUSB | Card Present Inputs | TTL-compatible, internally pulled up to AUXIN; detect PCI Express or USB card insertion to trigger power-on sequencing |
| RCLKEN | Bidirectional Reference Clock Enable | Open-drain output (power-good indicator) or input (host-controlled PERST delay); must never be driven high externally |
| PERST | Power-Good Output | Active-low logic-level signal indicating all rails are within tolerance; includes programmable delay after RCLKEN release |
| OC | Overcurrent Status Output | Open-drain fault flag asserted (low) when any rail exceeds current limit, with 6–20 ms deglitch filtering |
| 3.3VIN / 1.5VIN / AUXIN | Input Voltage Supplies | Independent inputs for each rail; AUXIN powers internal logic and pullups, and must be present for device operation |
| 3.3VOUT / 1.5VOUT / AUXOUT | Switched Outputs | Direct-switched outputs with integrated discharge FETs; sink to GND when disabled or during card removal |
| GND | Ground Reference | Primary return path for power and logic; connects to exposed PowerPAD for thermal conduction |
Key Features
| Feature | Design Value |
|---|---|
| ExpressCard™ Compliance | Fully satisfies ExpressCard|34/|54 Implementation Guidelines and Compliance Checklists - eliminates need for external validation circuitry |
| Triple-Rail Protection | Integrated current limiting, thermal shutdown, and UVLO per rail - removes requirement for discrete current-sense amplifiers or external supervisors |
| Intelligent Power Sequencing | Five deterministic power states (No Card, Standby, Card Inserted, etc.) managed by dedicated logic - enables reliable hot-plug detection and state recovery |
| Fast Discharge Control | On-chip discharge FETs with 100–500 Ω resistance - ensures rapid rail collapse (<30 ms) upon card removal or SHDN assertion per spec |
| WAKE Function Support | Dedicated STBY and RCLKEN interaction - allows host to maintain AUX power while gating 3.3V/1.5V, enabling wake-from-sleep via card activity |
Applications
| ExpressCard Host Controller | Notebook Computer Expansion Slot |
|---|---|
Use Scenario: Embedded ExpressCard host controller in chipset or southbridge managing PCIe/USB-based add-in modules. IC Role / Device Role / Timing Role: Primary power interface switch delivering and monitoring 3.3V, 1.5V, and AUX rails with precise PERST timing synchronized to RCLKEN. Use Value: Eliminates discrete power management components and guarantees ExpressCard compliance without firmware intervention. |
Use Scenario: Hot-pluggable ExpressCard slot in ultraportable notebooks requiring low quiescent current and thermal robustness. IC Role / Device Role / Timing Role: Single-chip solution providing rail switching, overcurrent protection, and standby-mode retention for battery-sensitive designs. Use Value: Reduces BOM count by 7+ components and cuts PCB area by >30% versus discrete MOSFET + supervisor implementations. |
| Desktop Add-in Card Interface | Digital Camera Media Adapter |
Use Scenario: Desktop motherboard ExpressCard slot supporting high-bandwidth peripherals like SSD adapters or FPGA accelerators. IC Role / Device Role / Timing Role: High-current power switch with 1.3-A 3.3VOUT capability and fast turn-on propagation (<1.5 ms) for responsive peripheral enumeration. Use Value: Enables full ExpressCard|54 bandwidth without rail droop or thermal throttling under sustained load. |
Use Scenario: Compact digital camera with ExpressCard-compatible media expansion for raw video capture cards. IC Role / Device Role / Timing Role: Low-profile power manager handling card insertion detection, rail ramp-up, and safe discharge during ejection. Use Value: Supports <100-ms card-ready latency and <30-ms safe-eject time, meeting real-time imaging workflow requirements. |
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 functional spec, but in 20-pin TSSOP (PW) package - higher thermal resistance (7.41 mW/°C vs 33.19 mW/°C) and lower max power rating (704 mW vs 3153 mW) | Preferred only where board space is constrained and thermal load is light (<500 mA 3.3VOUT) | Select TPS2231MRGPR-3 for production systems requiring full 1.3-A 3.3VOUT capability and industrial temperature range reliability. |
| TPS2236DAPR | Dual-slot ExpressCard switch in 32-pin HTSSOP - supports two independent card slots with separate PERST/RCLKEN/OC per slot | Required for desktop motherboards or docking stations with dual ExpressCard|34/|54 slots | Choose TPS2231MRGPR-3 when only single-slot support is needed - avoids unnecessary complexity and cost of dual-channel control logic. |
Compared with TPS2231PWPR, TPS2231MRGPR-3 delivers 4.5× higher thermal power dissipation margin and full-rated 1.3-A output; compared with TPS2236DAPR, it reduces pin count by 33%, simplifies layout, and lowers system cost where dual-slot capability is unnecessary.
Availability
TPS2231MRGPR-3 is available at Aetrix Electronics and suitable for notebook computers, desktop add-in card interfaces, and digital camera media adapters requiring stable component supply, ExpressCard compliance assurance, and industrial-grade thermal performance.
Supply support for TPS2231MRGPR-3 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-3 belongs to TI's ExpressCard power interface product line, engineered specifically to replace discrete MOSFET + supervisor solutions in host systems requiring full compliance with ExpressCard|34/|54 mechanical, electrical, and timing specifications.
FAQ
What is the function of the RCLKEN pin on the TPS2231MRGPR-3?
The RCLKEN pin on the TPS2231MRGPR-3 serves as a bidirectional reference clock enable signal. As an output, it transitions high (after internal discharge FET release) to indicate all output rails are within tolerance; as an input, holding it low delays PERST de-assertion. It must never be driven high externally due to internal discharge FET topology. This dual behavior enables precise host-controlled power-good timing in ExpressCard systems.
Does the TPS2231MRGPR-3 support both PCI Express and USB-based ExpressCard modules?
Yes, the TPS2231MRGPR-3 supports both PCI Express and USB-based ExpressCard modules via dedicated CPPE (Card Present PCI Express) and CPUSB (Card Present USB) inputs. These TTL-compatible pins are internally pulled up to AUXIN and detect card insertion by grounding - triggering appropriate power sequencing and enabling correct rail activation based on card type.
How does the TPS2231MRGPR-3 handle overcurrent events on its output rails?
The TPS2231MRGPR-3 monitors current on all three output rails (3.3VOUT, 1.5VOUT, AUXOUT) using integrated current-sense circuitry. Upon overcurrent detection, it asserts the open-drain OC pin low after a 6–20 ms deglitch delay. The affected rail enters constant-current foldback mode, limiting peak current to 1.3 A (3.3V), 650 mA (1.5V), or 275 mA (AUX) while maintaining regulation.
What is the role of the STBY input on the TPS2231MRGPR-3 during card operation?
The STBY input on the TPS2231MRGPR-3 places the device into Standby mode when asserted low after card insertion: AUXOUT remains active to sustain card presence and logic, while 3.3VOUT and 1.5VOUT are disabled to reduce system power. If asserted before card insertion, STBY forces full OFF mode. This enables WAKE functionality and extends battery life in portable ExpressCard host systems.
Can the TPS2231MRGPR-3 operate without the 3.3VIN or 1.5VIN supplies present?
Yes - the TPS2231MRGPR-3 can operate with only AUXIN present, as AUXIN powers internal logic, pullups, and the discharge FETs. However, 3.3VIN and 1.5VIN are required to activate their respective output rails. UVLO thresholds ensure 3.3VIN < 2.6 V or 1.5VIN < 1.0 V disables the corresponding switch, preventing partial rail activation and ensuring ExpressCard compliance.
TPS2231MRGPR-3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-VFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-3 FAQ
1.How can I place an order for TPS2231MRGPR-3 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2231MRGPR-3 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-3 reliable?
The price and inventory of TPS2231MRGPR-3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2231MRGPR-3 is usually 5 days.
3.What payment methods are accepted for TPS2231MRGPR-3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2231MRGPR-3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2231MRGPR-3?
TPS2231MRGPR-3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2231MRGPR-3 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-3?
For technical support, including TPS2231MRGPR-3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2231MRGPR-3 requirements.
6.How does Aetrix verify that TPS2231MRGPR-3 is sourced from the original manufacturer or authorized distributors?
All TPS2231MRGPR-3 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-3 meets industry standards.
7.What is the process for return or replacement of TPS2231MRGPR-3?
All TPS2231MRGPR-3 units undergo pre-shipment inspection (PSI). If there is an issue with TPS2231MRGPR-3, 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-3 part is unused and in its original packaging.
Return procedure for TPS2231MRGPR-3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS2231MRGPR-3 Tags
-
TPS22919DCKR
Texas Instruments
-
MIC2091-1YM5-TR
Microchip Technology
-
MIC2090-1YM5-TR
Microchip Technology
-
TPS22995RZFR
Texas Instruments
-
TPS22975DSGR
Texas Instruments
-
SIP32510DT-T1-GE3
Vishay Siliconix
-
ULN2003D1013TR
STMicroelectronics
-
MIC2005A-1YM5-TR
Microchip Technology
-
MIC2005A-1YM6-TR
Microchip Technology
-
TPS22916BYFPR
Texas Instruments
-
TPS22917DBVR
Texas Instruments
-
ULN2003APWR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
