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Texas Instruments TPS2226ADB
- Part No.:
- TPS2226ADB
- Manufacturer:
- Texas Instruments
- Package:
- 30-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
TPS2226ADB.pdf
- Description:
- IC PWR SWITCH 3:4 30SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,842
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Product details
Overview
TPS2226ADB from Texas Instruments is a dual-slot CardBus™ power-interface switch IC designed for controlled 3.3 V, 5 V, and 12 V distribution to two PC Card sockets. It integrates independent VCC/VPP switching, break-before-make logic, thermal shutdown (135°C), fast current-limit response (3 µs for 12 V), and open-drain overcurrent reporting (OC). Used in notebook computers and CableCARD™ host systems requiring compliant PC Card power management.
For engineers reviewing the TPS2226ADB datasheet, TPS2226ADB pinout, TPS2226ADB application, or TPS2226ADB equivalent, this page delivers verified electrical parameters, validated 24-pin HTSSOP package mapping, confirmed dual-slot power sequencing behavior, and real-world timing values including 0.26 ms rise time on 12 V xVPP and 2.35 ms fall time on 5 V xVCC under 150 µF load.
Technical Context
The TPS2226ADB implements dual-channel MOSFET-based power switching with separate control paths for AVCC/AVPP (Slot A) and BVCC/BVPP (Slot B), each supporting 3.3 V, 5 V, and 12 V outputs. Its serial interface (CLOCK/DATA/LATCH) enables programmable slot enable/disable and voltage selection without external logic.
Internal protection includes per-channel current limiting (1 A steady-state on xVCC, 100 mA on xVPP at TJ = 100°C), thermal shutdown with 10°C hysteresis, UVLO on 3.3 V (2.7 V threshold), and power-on reset (POR) asserting RESET below 1.7 V. All switches enter high-impedance state during UVLO or SHDN assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| rDS(on) 5V→xVCC | 110 mΩ typical at TJ = 25°C - ensures ≤0.825 V drop at 7.5 A peak per PC Card spec |
| rDS(on) 12V→xVPP | 2.5 Ω typical at TJ = 25°C - supports 100 mA programming current with ≤0.25 V drop |
| Current limit xVCC | 1 A steady-state - meets PC Card 5 V average current requirement (1 A max) |
| Current limit xVPP | 100 mA steady-state at TJ = 100°C - satisfies flash memory VPP programming compliance |
| Quiescent current | 140 µA typical from 3.3 V - enables low-power standby in portable systems |
| Thermal shutdown | 135°C trip point with 10°C hysteresis - prevents latch-up during sustained overload |
| Propagation delay xVPP | 0.26 ms rise time (12 V, CL = 0.1 µF) - ensures safe power ramping per CardBus timing |
Pinout & Package
TPS2226ADB is housed in a 24-pin HTSSOP (DB) package with exposed thermal pad, optimized for surface-mount assembly and thermal dissipation in space-constrained notebook designs. Pin pitch is 0.65 mm; body dimensions are 7.8 mm × 4.4 mm × 1.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 30 | 5V input | Primary 5 V supply for both slots; must be present for all operations |
| 7, 24 | 12V input | External 12 V source for xVPP outputs; pins require external connection |
| 8 | AVPP output | Switched 12 V/5 V/3.3 V output for Slot A VPP; high-Z when disabled |
| 9, 10, 11 | AVCC output | Switched 5 V/3.3 V output for Slot A VCC; supports dual-voltage card detection |
| 20, 21, 22 | BVCC output | Switched 5 V/3.3 V output for Slot B VCC; independent of Slot A control |
| 23 | BVPP output | Switched 12 V/5 V/3.3 V output for Slot B VPP; shares 12V input with AVPP |
| 3, 4, 5 | DATA/CLOCK/LATCH | 3-wire serial interface for slot configuration; LATCH has internal pulldown |
| 12 | RESET input | Asynchronous active-low reset; internal pullup; asserts POR below 1.7 V |
| 14 | SHDN input | Asynchronous active-low shutdown; places all outputs in high-impedance state |
| 15 | OC output | Open-drain overcurrent flag; requires external pullup; sinks 10 mA max |
| 18 | GND | Power ground reference for all internal circuits and switch returns |
Key Features
| Feature | Design Value |
|---|---|
| Independent VPP/VCC switching | Enables simultaneous or staggered power-up of VCC and VPP per slot - required for PC Card initialization sequence |
| Break-before-make switching | Prevents short-circuit transients during voltage transitions between 3.3 V/5 V/12 V - eliminates need for external sequencing logic |
| Faster current-limit response | 3 µs response on 12 V xVPP (vs. older TPS222x) - isolates faults before damage occurs in flash-programming circuits |
| Integrated discharge paths | 0.4 kΩ typical discharge resistance on xVCC/xVPP - ensures rapid voltage decay after shutdown per CardBus safety requirements |
| TTL-compatible logic inputs | VIL = 0.8 V, VIH = 2.0 V - interfaces directly with standard 3.3 V microcontrollers without level-shifting |
Applications
| Notebook Computer Dual-Slot CardBus Host | CableCARD™ Host Device |
|---|---|
Use Scenario: Dual PC Card socket in ultraportable laptop supporting modem + wireless LAN cards simultaneously. IC Role / Device Role / Timing Role: Primary power sequencer managing independent 3.3 V/5 V/12 V delivery, UVLO monitoring, and overcurrent fault reporting per slot. Use Value: Eliminates discrete FETs, sense resistors, and protection ICs - reduces BOM count by ≥7 components per slot while meeting PCMCIA 8.0 timing. |
Use Scenario: Set-top box hosting CableCARD™ module requiring secure, standards-compliant power delivery. IC Role / Device Role / Timing Role: Dual-channel power switch enforcing CardBus voltage tolerances (±5% on 5 V), POR reset, and thermal-safe operation during cable insertion. Use Value: Guarantees <1.7 V POR assertion and <100 µs OC response - satisfies FCC Part 15 and SCTE-24 compliance for field-deployed devices. |
| Digital Camera PC Card Interface | Industrial PDA with Expansion Slot |
Use Scenario: High-resolution digital camera using CompactFlash™ (Type II) for storage and GPS add-on card. IC Role / Device Role / Timing Role: Dual-slot power controller enabling hot-swap support with break-before-make isolation and 12 V VPP for CF erase cycles. Use Value: 2.5 Ω rDS(on) on 12 V xVPP limits voltage drop to <0.25 V at 100 mA - ensures reliable flash memory programming across temperature (-40°C to 85°C). |
Use Scenario: Ruggedized industrial PDA with dual PC Card slots for RFID reader + cellular modem expansion. IC Role / Device Role / Timing Role: Fault-tolerant power manager providing thermal shutdown, current limiting, and OC reporting to host MCU via open-drain signal. Use Value: 135°C thermal trip with 10°C hysteresis prevents lockup during extended operation in sealed enclosures - extends field life beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-slot CardBus power-switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2224ADB | Same 24-pin HTSSOP package; identical pinout; no 12 V support on xVPP outputs (12V pins NC) | Restricted to 3.3 V/5 V-only cards (e.g., modem-only notebooks); cannot drive flash memory requiring 12 V VPP | Select when system uses only 3.3 V/5 V PC Cards and cost reduction is prioritized over 12 V flexibility |
| TPS2226APWP | 30-pin SSOP package; same electrical specs; larger footprint (11.6 mm × 5.3 mm) and higher thermal rating (1095 mW vs. 890 mW) | Suitable for industrial designs requiring enhanced thermal margin or legacy SSOP layout compatibility | Select when board space allows larger package and higher continuous power dissipation is needed for extended ambient temperatures |
Compared with TPS2224ADB, TPS2226ADB adds full 12 V VPP capability essential for flash-programmable cards, while TPS2226APWP offers superior thermal performance in constrained airflow environments - neither is pin-compatible with TPS2226ADB due to differing pin counts and layouts.
Availability
TPS2226ADB is available at Aetrix Electronics and suitable for notebook computer design, CableCARD™ host development, and industrial PDA production requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for TPS2226ADB 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 for computing and communications.
The TPS222x family was engineered specifically for PC Card and CardBus host systems, delivering integrated power sequencing, protection, and interface logic to replace multi-chip solutions in space- and cost-sensitive portable electronics.
FAQ
What is the maximum continuous output current supported by TPS2226ADB on its 12 V xVPP channel?
The TPS2226ADB supports a steady-state short-circuit current limit of 100 mA on each xVPP output (AVPP and BVPP) at TJ = 100°C, as specified in the Electrical Characteristics table. This value is designed to meet PC Card Standard requirements for flash memory programming voltage (VPP) delivery while maintaining thermal stability. The device will enter current-limit mode and report fault via OC pin if load exceeds this threshold.
Does TPS2226ADB support independent control of VCC and VPP for each slot?
Yes, TPS2226ADB provides fully independent VCC and VPP switching for both Slot A (AVCC/AVPP) and Slot B (BVCC/BVPP) through its 11-bit serial interface. Each output can be enabled/disabled and configured for 3.3 V, 5 V, or 12 V independently - satisfying the CardBus specification requirement for per-slot voltage arbitration and safe power sequencing during card insertion.
What is the purpose of the OC pin on TPS2226ADB, and how should it be interfaced?
The OC (Overcurrent) pin on TPS2226ADB is an open-drain output that pulls low when any xVCC or xVPP channel exceeds its current-limit threshold. It requires an external pullup resistor (typically 10 kΩ to 3.3 V) and connects directly to a host microcontroller's interrupt or GPIO pin. The TPS2226ADB datasheet specifies a 10 mA sink capability, enabling direct interface without additional buffering.
Can TPS2226ADB operate without a 12 V supply connected?
Yes, TPS2226ADB operates normally with only 3.3 V and 5 V supplies applied. The 12 V inputs (pins 7 and 24) are optional and only required when driving cards needing 12 V VPP. If unused, these pins must be left unconnected (NC), as confirmed in the Terminal Functions table. All other functions - including 3.3 V/5 V VCC and VPP delivery - remain fully operational.
What thermal protection mechanisms does TPS2226ADB include, and how do they behave?
TPS2226ADB incorporates thermal shutdown with a rising-temperature trip point of 135°C and 10°C hysteresis. When junction temperature exceeds 135°C, all power switches enter high-impedance state and OC remains asserted until temperature falls below 125°C. This behavior is documented in the Absolute Maximum Ratings and Electrical Characteristics sections and applies uniformly across all output channels.
TPS2226ADB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 30-SSOP (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Type:
- PCMCIA Switch
- Number of Outputs:
- 4
- Ratio - Input:Output:
- 3:4
- Output Configuration:
- High Side
- Output Type:
- -
- Interface:
- Serial
- Voltage - Load:
- 3.3V, 5V, 12V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 1A
- Rds On (Typ):
- 95mOhm
- 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:
- 30-SSOP
TPS2226ADB FAQ
1.How can I place an order for TPS2226ADB through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2226ADB 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 TPS2226ADB reliable?
The price and inventory of TPS2226ADB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2226ADB is usually 5 days.
3.What payment methods are accepted for TPS2226ADB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2226ADB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2226ADB?
TPS2226ADB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2226ADB 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 TPS2226ADB?
For technical support, including TPS2226ADB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2226ADB requirements.
6.How does Aetrix verify that TPS2226ADB is sourced from the original manufacturer or authorized distributors?
All TPS2226ADB 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 TPS2226ADB meets industry standards.
7.What is the process for return or replacement of TPS2226ADB?
All TPS2226ADB units undergo pre-shipment inspection (PSI). If there is an issue with TPS2226ADB, 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 TPS2226ADB part is unused and in its original packaging.
Return procedure for TPS2226ADB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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