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Texas Instruments TPS2228PWP
- Part No.:
- TPS2228PWP
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS2228PWP.pdf
- Description:
- IC PWR SWITCH 3:4 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,035
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Product details
Overview
TPS2228PWP from Texas Instruments is a dual-slot PC Card power interface switch with serial control, designed for PCMCIA controllers in legacy portable systems. It delivers independently programmable 3.3 V (xVCC), 5 V (xVCC), and 1.8 V/3.3 V/5 V (xVPP/VCORE) to two card slots, features break-before-make switching, thermal shutdown at 155°C, and 95 µA typical quiescent current on 3.3 VIN input.
For engineers reviewing the TPS2228PWP datasheet, TPS2228PWP pinout, TPS2228PWP application, or TPS2228PWP equivalent, this device serves as a dedicated power management solution for CableCARD™-compliant PCMCIA host controllers requiring dual-slot support, overcurrent reporting via open-drain OC pin, and UVLO protection per rail (3.3VIN, 5VIN, 1.8VIN).
Technical Context
The TPS2228PWP implements a dual-channel architecture with separate AVCC/AVPP-VCORE and BVCC/BVPP-VCORE output pairs, each controlled via a 11-bit serial interface (CLOCK/DATA/LATCH). Its internal current-limit circuitry responds in ≤2 µs for 5VIN-to-xVPP/VCORE shorts and provides independent trip thresholds per output path - 1 A for xVCC, 500 mA for 1.8VIN→xVPP/VCORE, and 100 mA for 5VIN→xVPP/VCORE at TJ = 100°C.
It integrates UVLO per input rail (3.3VIN: 2.2–2.9 V threshold; 5VIN: 2.0–2.6 V; 1.8VIN: 1.25–1.62 V), power-on reset, and dual thermal shutdown: high-trip (155°C) disables all switches, low-trip (120°C during overcurrent) disables only the affected channel pair. All outputs support Hi-Z state and discharge resistors (0.1–0.5 kΩ) for safe power-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Package | 20-pin HTSSOP (PWP), RoHS-compliant, 0.65 mm pitch, exposed thermal pad |
| Input Voltage Ranges | 3.3VIN: 3.0–3.6 V (required for operation); 5VIN: 2.7–5.5 V; 1.8VIN: 1.7–5.5 V |
| Output Current Limits | xVCC: 1 A (TJ = 25°C); xVPP/VCORE: 500 mA @ 1.8VIN/3.3VIN, 100 mA @ 5VIN (TJ = 100°C) |
| On-Resistance (rDS(on)) | 72 mΩ (3.3VIN→xVCC, TJ = 25°C); 69 mΩ (1.8VIN→xVPP/VCORE, TJ = 25°C) |
| Quiescent Current | 95 µA typical on 3.3VIN input (dual-serial configuration) |
| Operating Temperature | −40°C to +85°C ambient; junction max 100°C (derated above 25°C) |
| Protection Features | Per-output current limiting, open-drain OC fault flag, dual thermal shutdown (120°C/155°C), UVLO per rail |
Pinout & Package
TPS2228PWP uses a 20-pin HTSSOP (PWP) package with exposed thermal pad. Pin functions are validated per TI SLVS419C datasheet Figure 12 and Terminal Functions table (page 13), confirming dual serial-interface layout and dedicated AVCC/BVCC and AVPP-VCORE/BVPP-VCORE output banks.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 | 5VIN | 5-V input supply for both xVCC and xVPP/VCORE paths; must be decoupled locally |
| 5, 19 | 1.8VIN | 1.8-V input for xVPP/VCORE outputs; pins internally isolated - external connection required |
| 11, 12 | 3.3VIN | Mandatory 3.3-V supply for chip logic and xVCC/xVPP-VCORE outputs; powers internal circuitry |
| 7, 8 | AVCC | Switched output for Slot A VCC (3.3 V / 5 V); driven by 3.3VIN or 5VIN input |
| 6 | AVPP/VCORE | Switched output for Slot A VPP/VCORE (1.8 V / 3.3 V / 5 V); driven by 1.8VIN / 3.3VIN / 5VIN |
| 14, 15 | BVCC | Switched output for Slot B VCC (3.3 V / 5 V); independent control from AVCC bank |
| 17 | BVPP/VCORE | Switched output for Slot B VPP/VCORE (1.8 V / 3.3 V / 5 V); independent control from AVPP/VCORE |
| 2, 3 | DATA, CLOCK | Serial interface inputs for 11-bit command word; synchronous to rising clock edge |
| 4 | LATCH | Edge-triggered load signal; latches DATA on rising edge prior to next CLOCK |
| 10 | RESET | Asynchronous active-low reset; forces all outputs Hi-Z and enables discharge resistors |
| 13 | OC | Open-drain overcurrent status flag; pulled low when any output exceeds its current limit |
| 9 | GND | Power ground reference; connects to PCB ground plane under thermal pad |
| 16, 18 | NC | No internal connection; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent slot control | Separate AVCC/AVPP-VCORE and BVCC/BVPP-VCORE banks enable concurrent but distinct power sequencing per slot |
| Programmable xVPP/VCORE voltage | Supports 1.8 V, 3.3 V, or 5 V on xVPP/VCORE outputs - critical for mixed-voltage PC Cards and CableCARD™ compliance |
| Break-before-make switching | Prevents rail-to-rail shorting during voltage transitions; ensures safe hot-swap of PC Cards without bus contention |
| Per-output current limiting | Independent trip points per output path avoid cascading faults - only affected slot shuts down during overcurrent |
| Thermal fault isolation | Low-trip thermal shutdown (120°C) disables only the overloaded channel pair, preserving operation of the healthy slot |
| UVLO per input rail | 3.3VIN, 5VIN, and 1.8VIN each have dedicated undervoltage lockout - prevents erratic behavior during brownout |
Applications
| CableCARD™ Host Interface | Notebook PCMCIA Expansion |
|---|---|
|
Use Scenario: CableCARD™ module insertion into set-top box or digital TV host with PCMCIA-style connector. IC Role / Device Role / Timing Role: Dual-rail power manager delivering 3.3 V to VCC and 1.8 V to VCORE while enforcing PCMCIA timing and hot-swap safety. Use Value: Enables certified CableCARD™ interoperability by meeting SFF-8011/PCMCIA v2.1 power sequencing, UVLO, and overcurrent reporting requirements. |
Use Scenario: Adding modem, wireless LAN, or GPS functionality via PC Card slot in legacy notebook design. IC Role / Device Role / Timing Role: Serial-controlled dual-slot power switch managing independent 3.3 V/5 V VCC and 1.8 V/3.3 V VPP/VCORE rails per slot. Use Value: Reduces BOM count vs discrete FET solutions; eliminates need for external current-sense amplifiers or thermal sensors. |
| Industrial Data Acquisition Card | Digital Camera PC Card Adapter |
|
Use Scenario: Field-deployable DAQ system using PCMCIA-form-factor sensor cards in ruggedized enclosures. IC Role / Device Role / Timing Role: Fault-tolerant power interface providing Hi-Z isolation, OC fault flag, and thermal shutdown for mission-critical field use. Use Value: Prevents system-level damage from misinserted or defective cards; supports extended temperature operation (−40°C to +85°C). |
Use Scenario: High-resolution digital camera with removable PC Card storage or Wi-Fi adapter. IC Role / Device Role / Timing Role: Low-quiescent-current (95 µA) power switch enabling long battery life during card standby and fast wake-up. Use Value: Minimizes parasitic drain on Li-ion battery; supports rapid card detection and power-up within <1.15 ms (3.3VIN→xVPP/VCORE). |
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 |
|---|---|---|---|
| TPS2228DB | 30-pin SSOP package; identical dual-serial functionality, higher pin count accommodates separate 1.8VIN pins without external tie | Used in space-tolerant designs where thermal pad access is impractical; same electrical specs and timing | Select TPS2228DB if board layout allows larger footprint and requires no external 1.8VIN tie trace |
| TPS2221PWP | 14-pin HTSSOP; single-slot parallel-interface variant; lacks serial control, uses VD0–VD3 pins instead of CLOCK/DATA/LATCH | Targeted at simpler, cost-sensitive single-slot hosts without serial microcontroller interface | Choose TPS2221PWP only for new single-slot designs - not drop-in compatible due to pinout, interface, and feature set differences |
Compared with TPS2228PWP, the TPS2228DB offers identical functionality in a larger package with simplified 1.8VIN routing, while the TPS2221PWP reduces complexity and cost for single-slot applications but sacrifices dual-slot capability and serial programmability.
Availability
TPS2228PWP is available at Aetrix Electronics and suitable for notebook expansion, CableCARD™ host interfaces, and industrial PCMCIA data acquisition systems requiring stable component supply across extended product lifecycles.
Supply support for TPS2228PWP 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 experience in power management ICs.
The TPS2228PWP belongs to TI's PC Card power interface switch product line, engineered specifically to meet PCMCIA v2.1 and CableCARD™ power delivery, sequencing, and fault-reporting requirements in portable and set-top host systems.
FAQ
What is the primary function of the TPS2228PWP in a PCMCIA system?
The TPS2228PWP serves as a dual-slot PC Card power interface switch that manages independent 3.3 V, 5 V, and 1.8 V power delivery to two PCMCIA slots. It implements break-before-make switching, per-output current limiting, thermal shutdown, and open-drain OC fault reporting - all essential for compliant, robust hot-swap operation in hosts like CableCARD™ set-top boxes and legacy notebooks. The TPS2228PWP ensures safe, standards-aligned power sequencing without external discrete components.
Does the TPS2228PWP support 1.8 V operation on both xVCC and xVPP/VCORE outputs?
No - the TPS2228PWP supports 1.8 V only on the xVPP/VCORE outputs (AVPP/VCORE and BVPP/VCORE), not on xVCC. The xVCC outputs (AVCC and BVCC) are limited to 3.3 V or 5 V sourced from 3.3VIN or 5VIN inputs. This aligns with PCMCIA specifications where VCC supplies main logic power and VPP/VCORE supplies core or programming voltage. The TPS2228PWP's 1.8VIN pin feeds exclusively the xVPP/VCORE switch paths, confirmed in the Electrical Characteristics and Terminal Functions tables of the SLVS419C datasheet.
How does the TPS2228PWP handle overcurrent events on one slot without affecting the other?
The TPS2228PWP applies independent current limiting per output path: AVCC, AVPP/VCORE, BVCC, and BVPP/VCORE each have dedicated sensing and trip circuitry. During an overcurrent event on, say, AVPP/VCORE, only that output is current-limited - BVCC and BVPP/VCORE remain fully operational. The OC pin asserts low to signal the fault, but the unaffected slot continues normal power delivery. This channel-level isolation is enabled by the dual-bank architecture and is explicitly documented in the Thermal Shutdown section (page 16) of the TPS2228PWP datasheet.
Is the TPS2228PWP pin-compatible with the TPS2221PWP?
No - the TPS2228PWP (20-pin HTSSOP, serial interface) and TPS2221PWP (14-pin HTSSOP, parallel interface) have fundamentally different pinouts, control schemes, and functionality. The TPS2228PWP uses CLOCK/DATA/LATCH pins and supports dual slots; the TPS2221PWP uses VD0–VD3 control lines and supports only a single slot. Their pin assignments, terminal counts, and signal definitions are mutually incompatible - PCB redesign and firmware changes would be required for substitution. The TPS2228PWP datasheet explicitly lists them as distinct devices in the Ordering Information table.
What is the role of the 1.8VIN pin on the TPS2228PWP, and how must it be connected?
The 1.8VIN pin (pins 5 and 19 on TPS2228PWP) supplies the 1.8 V rail exclusively to the xVPP/VCORE output switches (AVPP/VCORE and BVPP/VCORE). Per the datasheet Terminal Functions table (page 13), these two 1.8VIN pins must be connected together externally on the PCB - they are not internally bonded. This external tie ensures balanced current sharing and avoids voltage mismatch between the two xVPP/VCORE banks. Failure to connect them risks asymmetric switching behavior or undefined output states on the 1.8 V paths of the TPS2228PWP.
TPS2228PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Bulk
- 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
TPS2228PWP FAQ
1.How can I place an order for TPS2228PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2228PWP 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 TPS2228PWP reliable?
The price and inventory of TPS2228PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2228PWP is usually 5 days.
3.What payment methods are accepted for TPS2228PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2228PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2228PWP?
TPS2228PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2228PWP 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 TPS2228PWP?
For technical support, including TPS2228PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2228PWP requirements.
6.How does Aetrix verify that TPS2228PWP is sourced from the original manufacturer or authorized distributors?
All TPS2228PWP 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 TPS2228PWP meets industry standards.
7.What is the process for return or replacement of TPS2228PWP?
All TPS2228PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS2228PWP, 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 TPS2228PWP part is unused and in its original packaging.
Return procedure for TPS2228PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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