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Texas Instruments TPS2228PWPR
- Part No.:
- TPS2228PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS2228PWPR.pdf
- Description:
- IC PWR SWITCH 3:4 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,152
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Product details
Overview
TPS2228PWPR from Texas Instruments is a dual-slot PC Card power interface switch with serial control, designed for PCMCIA controllers in CableCARD™ and legacy PC card systems. It delivers independently programmable 3.3 V (XVCC), 5 V (XVCC), and 1.8 V/3.3 V/5 V (XVPP/VCORE) outputs with break-before-make switching, thermal shutdown (155°C trip), and overcurrent protection (1 A XVCC / 500 mA XVPP/VCORE at 100°C). It operates across −40°C to 85°C ambient and supports notebook computers and digital cameras.
For engineers reviewing the TPS2228PWPR datasheet, TPS2228PWPR pinout, TPS2228PWPR application, or TPS2228PWPR equivalent, key selection considerations include its 20-pin HTSSOP package, dual-channel serial-interface architecture, independent VPP/VCORE voltage programming, 95 µA typical quiescent current on 3.3 VIN, and compliance with PC Card power distribution requirements for hot-plug-safe slot management.
Technical Context
The TPS2228PWPR implements two fully independent power-switch channels-AVCC/AVPP-VCORE and BVCC/BVPP-VCORE-each with dedicated input rails (3.3VIN, 5VIN, 1.8VIN) and separate current-limiting circuitry. Its serial interface (CLOCK/DATA/LATCH) enables compact control of all eight output states (including Hi-Z) using a 11-bit command word, eliminating parallel bus overhead.
Each channel integrates UVLO (2.2–2.9 V for 3.3VIN), thermal shutdown with dual thresholds (155°C device protection, 120°C per-channel overcurrent response), and fast current-limit activation (2–250 µs depending on rail and load). Output discharge resistors (0.1–0.5 kΩ) ensure safe voltage ramp-down during disable transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Package | 20-pin HTSSOP (PWP), 0.65 mm pitch, exposed thermal pad - enables high-density PCB layout and thermal dissipation up to 920 mW at 70°C ambient. |
| Input Voltage Range | 3.3VIN: 3.0–3.6 V (required for operation); 5VIN: 2.7–5.5 V; 1.8VIN: 1.7–5.5 V - supports mixed-voltage PC card hot insertion without sequencing constraints. |
| XVCC Switch RDS(on) | 72–95 mΩ @ 25°C (3.3VIN→XVCC, dual channel), 120 mΩ @ 100°C - limits I²R loss and self-heating under 750 mA per channel. |
| XVPP/VCORE Switch RDS(on) | 69–95 mΩ @ 25°C (1.8VIN→XVPP/VCORE), 325 mΩ @ 100°C (3.3VIN→XVPP/VCORE) - ensures stable core voltage delivery for low-power flash and logic ICs. |
| Overcurrent Limit | XVCC: 1–2.5 A (temperature-dependent); XVPP/VCORE: 120–1250 mA - provides graded protection matching PC card load profiles (e.g., 100 mA for 5 V programming, 500 mA for 1.8 V core). |
| Quiescent Current | 95 µA typ @ 3.3 VIN - minimizes standby power draw in battery-powered host systems during card slot idle states. |
| Thermal Shutdown | 155°C primary trip (full-device disable), 120°C secondary trip (per-channel disable during overcurrent) - prevents permanent damage while maintaining partial system functionality. |
Pinout & Package
TPS2228PWPR uses a 20-pin HTSSOP (PWP) package with 0.65 mm lead pitch and exposed thermal pad. Pin 1 is located at the top-left corner adjacent to the index mark.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 | 5VIN | Primary 5 V input rail for both XVCC and XVPP/VCORE channels; must be decoupled locally to support transient current demands. |
| 5, 19 | 1.8VIN | Dedicated 1.8 V input for XVPP/VCORE channel; pins must be externally tied together per datasheet requirement. |
| 11, 12 | 3.3VIN | Mandatory 3.3 V supply for internal logic, UVLO reference, and chip operation; powers all control circuitry and enables device startup. |
| 7, 8 | AVCC | Switched 3.3/5 V output for Slot A VCC; connects directly to PC card connector's VCC pins (A-side). |
| 6 | AVPP/VCORE | Switched 1.8/3.3/5 V output for Slot A VPP/VCORE; supports flash programming and low-voltage core supply. |
| 14, 15 | BVCC | Switched 3.3/5 V output for Slot B VCC; electrically isolated from AVCC path for independent slot control. |
| 17 | BVPP/VCORE | Switched 1.8/3.3/5 V output for Slot B VPP/VCORE; enables dual-slot CableCARD™ or dual-PCMCIA host designs. |
| 3 | DATA | Serial data input (LSB-first, 11-bit command); synchronous to CLOCK; controls all switch states and shutdown modes. |
| 4 | LATCH | Edge-triggered strobe that captures DATA bits into internal shift register; internal pulldown ensures default Hi-Z state on power-up. |
| 2 | CLOCK | Serial clock input (max 2.5 MHz); defines timing for DATA sampling and LATCH synchronization. |
| 13 | OC | Open-drain overcurrent status flag; pulled low when any XVCC or XVPP/VCORE channel exceeds current limit - used for system fault logging. |
| 10 | RESET | Asynchronous active-low reset; forces all switches to Hi-Z and activates output discharge - essential for safe card ejection. |
| 18 | SHDN | Asynchronous active-low shutdown; places all switches in Hi-Z state without discharging outputs - used for low-power sleep mode. |
| 9 | GND | Analog/digital ground reference; must be connected to low-impedance system ground plane beneath thermal pad. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent serial-controlled channels | Enables simultaneous but separate power management for two PC card slots using only three control lines (CLOCK/DATA/LATCH), reducing host GPIO count and PCB routing complexity. |
| Break-before-make switching | Prevents short-circuit transients during voltage transitions (e.g., 5 V → 3.3 V), eliminating risk of cross-rail contention in mixed-voltage card environments. |
| Per-channel overcurrent detection with OC flag | Allows host firmware to isolate faults to Slot A or Slot B without disabling the entire interface - critical for field-replaceable modular systems. |
| Independent XVPP/VCORE voltage programming | Supports concurrent delivery of 1.8 V (core logic), 3.3 V (I/O), and 5 V (legacy flash programming) to the same card slot - satisfies PC Card Rev. 5.0 specification. |
| Integrated UVLO and thermal protection | Automatically disables affected outputs if input voltage drops below safe threshold (e.g., 2.2 V on 3.3VIN) or junction temperature exceeds 120°C - eliminates need for external supervision circuits. |
Applications
| CableCARD™ Host Devices | Notebook PC Card Slots |
|---|---|
Use Scenario: Integrated CableCARD™ module in set-top boxes or digital TVs requiring secure, hot-pluggable conditional access. IC Role / Device Role / Timing Role: Dual-channel power switch managing independent 3.3 V VCC and 1.8 V VCORE for CableCARD™ authentication IC and tuner interface. Use Value: Enables full PCMCIA-compliant power sequencing and overcurrent protection without external MOSFETs or discrete supervisors. |
Use Scenario: Legacy PCMCIA expansion in ultraportable notebooks supporting modems, wireless LAN, or GPS add-ons. IC Role / Device Role / Timing Role: Serial-controlled dual-slot power manager delivering 5 V (legacy cards), 3.3 V (modern cards), and 1.8 V (low-power peripherals) with automatic fault isolation. Use Value: Reduces BOM count by integrating eight discrete power switches and protection logic into one 20-pin HTSSOP device. |
| Digital Camera PCMCIA Interfaces | Industrial PDA Expansion Bays |
Use Scenario: High-resolution digital cameras with PCMCIA-compatible CompactFlash™ or MicroDrive™ storage interfaces. IC Role / Device Role / Timing Role: Dual-channel switch supplying 3.3 V VCC and 3.3 V VPP/VCORE to CF cards during read/write operations, with fast overcurrent response (<2 µs on 5 V rail). Use Value: Prevents camera shutdown due to CF card short circuits while maintaining uninterrupted image capture buffer operation. |
Use Scenario: Ruggedized PDAs with field-swappable PCMCIA modules for barcode scanning, RFID, or GPS. IC Role / Device Role / Timing Role: Hot-plug-safe power controller enabling live insertion/removal of modules with independent reset (RESET pin) and shutdown (SHDN pin) signaling. Use Value: Eliminates mechanical interlocks and manual power cycling, improving field serviceability and user experience. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PC Card power interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2228DBR | 30-pin SSOP package with identical dual-serial functionality, higher thermal resistance (10.95 °C/W vs. 30.67 °C/W), and same electrical specs. | Suitable for through-hole or larger footprint designs where thermal mass compensates for lower power density. | Select TPS2228DBR only when board space allows larger package and thermal design accommodates 164 mW max at 85°C ambient. |
| TPS2221PWP | Single-slot, parallel-interface variant (14-pin HTSSOP); lacks serial control, dual-channel capability, and independent XVPP/VCORE programming. | Applicable only to single-slot hosts with parallel GPIO availability and no CableCARD™ or dual-slot requirements. | Choose TPS2221PWP only for cost-sensitive, single-slot embedded systems where serial interface and dual-channel flexibility are unnecessary. |
Compared with TPS2228DBR and TPS2221PWP, the TPS2228PWPR uniquely combines dual-slot serial control, 20-pin HTSSOP compactness, and full XVPP/VCORE voltage independence - making it the sole fit for space-constrained CableCARD™ and dual-PCMCIA host designs requiring minimal GPIO usage and robust hot-plug safety.
Availability
TPS2228PWPR is available at Aetrix Electronics and suitable for notebook computers, CableCARD™ host devices, and digital camera PCMCIA interfaces requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS2228PWPR 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 for industrial, automotive, and communications markets.
The TPS2228 belongs to TI's PC Card Power Interface Switch product line, engineered specifically to replace discrete MOSFET arrays and supervisory ICs in PCMCIA-compliant host systems - delivering integrated, standards-compliant power sequencing and protection.
FAQ
What is the function of the SHDN pin on the TPS2228PWPR?
The SHDN (shutdown) pin on the TPS2228PWPR is an asynchronous active-low input that forces all power switches (AVCC, AVPP/VCORE, BVCC, BVPP/VCORE) into high-impedance (Hi-Z) state without activating output discharge. This enables low-power sleep mode while preserving output voltages for fast wake-up. Unlike RESET, SHDN does not assert the OC flag or engage discharge resistors - making it ideal for controlled power gating rather than fault recovery. The TPS2228PWPR internal pullup ensures safe default-on behavior at power-up.
Does the TPS2228PWPR support independent voltage selection for each XVPP/VCORE output?
Yes, the TPS2228PWPR supports independent voltage selection for AVPP/VCORE and BVPP/VCORE outputs via its 11-bit serial command word. Each channel can be configured to deliver 0 V, 1.8 V (from 1.8VIN), 3.3 V (from 3.3VIN), or 5 V (from 5VIN) - enabling mixed-voltage operation such as 1.8 V core + 3.3 V I/O on Slot A and 5 V programming + 3.3 V I/O on Slot B. This capability is explicitly defined in the TPS2228 control logic table and verified in the SLVS419C datasheet Figures 1 and 2.
What is the maximum continuous output current per channel for the TPS2228PWPR at 85°C ambient?
At 85°C ambient temperature and TJ = 100°C (worst-case junction), the TPS2228PWPR supports 750 mA per XVCC channel (AVCC/BVCC) and 375 mA per XVPP/VCORE channel (AVPP/VCORE/BVPP/VCORE) when supplied from 3.3VIN, as specified in the Recommended Operating Conditions table. These values scale with temperature and input rail - for example, 5VIN-to-XVCC delivers 500 mA at 100°C, while 1.8VIN-to-XVPP/VCORE supports 375 mA. Derating is required above 70°C ambient per the Dissipation Ratings Table.
How does the TPS2228PWPR handle overcurrent events on individual channels?
The TPS2228PWPR detects overcurrent independently on each of its four switched outputs (AVCC, AVPP/VCORE, BVCC, BVPP/VCORE) and responds within 2–250 µs depending on rail voltage and load. When triggered, it linearly limits current to the specified threshold (e.g., 1 A for XVCC, 500 mA for XVPP/VCORE) and asserts the open-drain OC pin low. Critically, only the affected channel is disabled - AVCC overcurrent does not impact BVCC or either XVPP/VCORE output - preserving partial system functionality during faults.
Is the TPS2228PWPR pin-compatible with the TPS2228DB package?
No, the TPS2228PWPR (20-pin HTSSOP) is not pin-compatible with the TPS2228DB (30-pin SSOP). Their pin counts, layouts, and terminal assignments differ significantly - for example, TPS2228PWPR uses pins 5 and 19 for 1.8VIN, while TPS2228DB assigns 1.8VIN to pins 6 and 28. Signal mapping also varies: CLOCK is pin 3 on TPS2228PWPR but pin 4 on TPS2228DB. Board redesign is required for substitution; no mechanical or electrical drop-in replacement exists between these packages.
TPS2228PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Type:
- PCMCIA Switch
- Number of Outputs:
- 4
- Ratio - Input:Output:
- 3:4
- Output Configuration:
- High Side
- Output Type:
- -
- Interface:
- Serial
- Voltage - Load:
- 1.8V, 3.3V, 5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 1A
- Rds On (Typ):
- 97mOhm
- Input Type:
- -
- Features:
- 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-HTSSOP
TPS2228PWPR FAQ
1.How can I place an order for TPS2228PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2228PWPR 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 TPS2228PWPR reliable?
The price and inventory of TPS2228PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2228PWPR is usually 5 days.
3.What payment methods are accepted for TPS2228PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2228PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2228PWPR?
TPS2228PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2228PWPR 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 TPS2228PWPR?
For technical support, including TPS2228PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2228PWPR requirements.
6.How does Aetrix verify that TPS2228PWPR is sourced from the original manufacturer or authorized distributors?
All TPS2228PWPR 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 TPS2228PWPR meets industry standards.
7.What is the process for return or replacement of TPS2228PWPR?
All TPS2228PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2228PWPR, 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 TPS2228PWPR part is unused and in its original packaging.
Return procedure for TPS2228PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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