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Texas Instruments TPS62225DDCR
- Part No.:
- TPS62225DDCR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS62225DDCR.pdf
- Description:
- IC REG BUCK 2.2V 400MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,301
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Product details
Overview
TPS62225DDCR from Texas Instruments is a synchronous step-down DC-DC converter delivering 2.2 V at up to 400 mA from a 2.5–6 V input, featuring 1.25-MHz fixed-frequency PWM operation, power-save mode for light loads, and 15 µA typical quiescent current. It operates in TSOT23-5 package and supports dynamic output-voltage positioning for transient response in portable power rails.
For engineers reviewing the TPS62225DDCR datasheet, TPS62225DDCR pinout, TPS62225DDCR application, or TPS62225DDCR equivalent, key selection criteria include its fixed 2.2 V output, 100% duty-cycle low-dropout capability, soft-start function, undervoltage lockout threshold (1.5–2 V), and compatibility with 4.7 µH inductors and ceramic output capacitors ≥10 µF.
Technical Context
The TPS62225DDCR uses voltage-mode control with input voltage feed-forward to achieve fast line/load regulation and stable operation with small ceramic capacitors. Its internal digital self-calibration adjusts duty cycle in ~1% steps to maintain ±3% output voltage accuracy across load and line variations.
At light loads, it enters pulse-frequency modulation (PFM) power-save mode-reducing switching frequency and quiescent current to ~15 µA-while maintaining regulation via comparator thresholds set at +0.8% and +1.6% above nominal output. It supports 100% duty-cycle operation for extended battery runtime down to minimum input voltage defined by rDS(on), inductor DCR, and load current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6 V - supports single-cell Li-ion (2.7–4.2 V) and standard 3.3 V/5 V rails without external regulators. |
| Output Voltage | Fixed 2.2 V ±3% - factory-trimmed; no external feedback resistors required. |
| Max Output Current | 400 mA - sufficient for core logic or I/O rails of low-power DSPs, microcontrollers, and RF front-ends. |
| Switching Frequency | 1.25 MHz (typical) - enables use of compact 4.7 µH inductors and ≤10 µF ceramic output capacitors. |
| Quiescent Current | 15 µA (typical) - ensures >90% efficiency at 1 mA load, critical for standby/battery-life optimization. |
| Enable Threshold | VEN(H) = 1.3 V min - compatible with 1.8 V GPIOs; VEN(L) = 0.4 V max ensures clean shutdown. |
| UVLO Threshold | 1.5 V to 2.0 V - prevents erratic startup or oscillation during brown-out conditions. |
Pinout & Package
TSOT23-5 package (2.9 mm × 1.6 mm × 0.8 mm), thermally enhanced with exposed pad (DDC suffix). Pin 1 marked by dot; top-view orientation per TI SLVS491E.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VI | Power Input | Connects to 2.5–6 V supply; requires local 4.7 µF ceramic decoupling capacitor. |
| 2 - GND | Ground Reference | System ground return path; must be low-impedance and tied directly to power plane under IC. |
| 3 - EN | Enable Control | Active-high logic input; pull high to enable, low to shut down (IQ ≈ 0.1 µA). |
| 4 - FB | Feedback Sense | Internally connected to 2.2 V reference; not user-accessible-fixed-output version disables external divider. |
| 5 - SW | Switch Node | Drives external 4.7 µH inductor; carries high di/dt; requires tight layout and Kelvin connection to inductor. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Output-Voltage Positioning | Maintains output at +0.8% above nominal during light load, providing headroom to absorb heavy-load transients without undershoot. |
| 100% Duty-Cycle Operation | Enables regulation down to VIN = VOUT + IOUT × rDS(on) + IOUT × RL, maximizing usable battery voltage range. |
| Digital Self-Calibration | Adjusts output in ~1% digital steps when deviation exceeds ±1.6%, achieving near-zero DC line/load regulation error. |
| Soft-Start Function | Staggers switch-current limit (83 → 167 → 335 → 670 mA) to limit inrush and prevent input rail collapse on weak sources. |
| Thermal Shutdown Protection | Activates at TJ ≥ 150°C; latches off until junction cools below hysteresis threshold (~140°C). |
Applications
| Smartphone Baseband Power | WLAN PC Card Core Supply |
|---|---|
Use Scenario: Powers baseband processor I/O banks requiring stable 2.2 V rail during burst data transmission and deep-sleep states. IC Role / Device Role / Timing Role: Primary buck regulator supplying regulated 2.2 V at up to 400 mA with fast transient response and ultra-low quiescent current. Use Value: Dynamic voltage positioning minimizes undershoot during 0→400 mA load steps; 15 µA IQ extends standby time without compromising wake-up latency. | Use Scenario: Supplies 2.2 V core voltage to IEEE 802.11b/g WLAN controller in PCMCIA form factor with space-constrained layout. IC Role / Device Role / Timing Role: Compact, high-efficiency step-down converter enabling full 400 mA delivery in TSOT23-5 footprint with minimal external components. Use Value: 1.25-MHz switching allows 4.7 µH inductor and 10 µF ceramic capacitor-reducing solution size vs. lower-frequency alternatives. |
| Portable Media Player Audio Codec | OMAP™ Subsystem I/O Rail |
Use Scenario: Delivers clean 2.2 V bias to stereo audio DAC/ADC in battery-powered media players with variable playback load profiles. IC Role / Device Role / Timing Role: Low-noise, high-PWM-to-PFM transition efficiency regulator supporting both continuous playback and pause modes. Use Value: Power-save mode reduces IQ to 15 µA during pause, while PFM/PWM seamless transition avoids audible switching artifacts. | Use Scenario: Provides dedicated 2.2 V I/O supply for OMAP application processors in handheld devices with multi-rail power architecture. IC Role / Device Role / Timing Role: Fixed-output buck converter with integrated soft-start and UVLO, synchronized to system power sequencing requirements. Use Value: 100% duty-cycle operation sustains regulation down to 2.3 V input, extracting maximum energy from aging Li-ion cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62224DDCR | Fixed 1.6 V output; identical package, pinout, and electrical specs except VOUT. | Used where 1.6 V I/O rail is required (e.g., certain memory interfaces); not interchangeable without board revision. | Select only if target system requires 1.6 V-not a drop-in replacement for 2.2 V systems. |
| TPS62228DDCR | Fixed 1.875 V output; same thermal performance, quiescent current, and switching frequency. | Suitable for mixed-voltage SoCs needing 1.875 V analog or interface supplies; differs in output tolerance band and load regulation curve. | Prefer when tighter 1.875 V matching is needed; verify stability with existing 4.7 µH/10 µF filter. |
Compared with TPS62224DDCR and TPS62228DDCR, the TPS62225DDCR provides the only 2.2 V fixed option in the family-critical for specific I/O standards and legacy interface compliance where 1.6 V or 1.875 V would cause timing or drive-strength violations.
Availability
TPS62225DDCR is available at Aetrix Electronics and suitable for smartphone baseband power, WLAN PC card core supply, portable media player audio codec bias, and OMAP™ subsystem I/O rail applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS62225DDCR 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 company headquartered in Dallas, Texas, designing and manufacturing analog, embedded processing, and connectivity products for industrial, automotive, and consumer markets.
The TPS6222x product line delivers high-efficiency, small-footprint synchronous buck converters optimized for battery-powered portable electronics-including PDAs, smart phones, and digital cameras-where low quiescent current, fast transient response, and minimal external component count are essential.
FAQ
What is the output voltage tolerance of the TPS62225DDCR over temperature and load?
The TPS62225DDCR maintains a fixed 2.2 V output with ±3% tolerance across the full operating ambient temperature range (−40°C to +85°C) and full load range (0–400 mA), as verified under VI = 2.5 V to 6 V conditions per TI SLVS491E. This specification includes combined effects of line regulation (0.26%/V), load regulation (0.0014%/mA), and reference drift.
Does the TPS62225DDCR require external feedback resistors to set its output voltage?
No. The TPS62225DDCR is the fixed 2.2 V version of the TPS6222x family and has the feedback divider integrated internally. Pin 4 (FB) is not user-accessible for resistor programming-unlike the adjustable TPS62220DDCR-and must remain unconnected in standard operation.
Can the TPS62225DDCR operate with a 4.7 µH inductor and 10 µF output capacitor?
Yes. The TPS62225DDCR is validated for stable operation with a 4.7 µH inductor and ≥10 µF ceramic output capacitor, as specified in TI's Application Information section. This combination achieves optimal efficiency and transient response while fitting within the internal compensation design envelope.
What is the shutdown current of the TPS62225DDCR when EN is pulled low?
When the EN pin is pulled low, the TPS62225DDCR enters shutdown mode with a typical supply current of 0.1 µA and a maximum of 1 µA over temperature, per the Electrical Characteristics table in SLVS491E. In this state, both power MOSFETs are disabled and the internal reference is powered down.
Is the TPS62225DDCR pin-compatible with other members of the TPS6222x family?
Yes. All TPS6222x variants-including TPS62225DDCR, TPS62224DDCR, and TPS62228DDCR-share identical TSOT23-5 (DDC) package dimensions, pin assignment (VI-GND-EN-SW-FB), and thermal pad layout. However, output voltage is factory-set per part number and not interchangeable without verifying system-level voltage requirements.
TPS62225DDCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.2V
- Voltage - Output (Max):
- -
- Current - Output:
- 400mA
- Frequency - Switching:
- 1.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS62225DDCR FAQ
1.How can I place an order for TPS62225DDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62225DDCR 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 TPS62225DDCR reliable?
The price and inventory of TPS62225DDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62225DDCR is usually 5 days.
3.What payment methods are accepted for TPS62225DDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62225DDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62225DDCR?
TPS62225DDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62225DDCR 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 TPS62225DDCR?
For technical support, including TPS62225DDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62225DDCR requirements.
6.How does Aetrix verify that TPS62225DDCR is sourced from the original manufacturer or authorized distributors?
All TPS62225DDCR 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 TPS62225DDCR meets industry standards.
7.What is the process for return or replacement of TPS62225DDCR?
All TPS62225DDCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62225DDCR, 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 TPS62225DDCR part is unused and in its original packaging.
Return procedure for TPS62225DDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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