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Texas Instruments TPS62225DDCT
- Part No.:
- TPS62225DDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS62225DDCT.pdf
- Description:
- IC REG BUCK 2.2V 400MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:667
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Product details
Overview
TPS62225DDCT from Texas Instruments is a 400-mA, 1.25-MHz synchronous step-down DC-DC converter in TSOT23-5 package, delivering fixed 2.2 V output from 2.5–6 V input. It features power-save mode (15 µA quiescent current), 100% duty-cycle low-dropout operation, and ±3% output voltage accuracy across load and line variations-designed for powering OMAP™ processors and low-voltage DSPs in portable media players.
For engineers reviewing the TPS62225DDCT datasheet, TPS62225DDCT pinout, TPS62225DDCT application, or TPS62225DDCT equivalent, key selection criteria include its fixed 2.2 V output, TSOT23-5 footprint compatibility, 1.25-MHz PWM/PFM hybrid control, soft-start behavior, and dynamic voltage positioning for transient response optimization in battery-powered embedded systems.
Technical Context
The TPS62225DDCT employs voltage-mode control with input voltage feed-forward to achieve fast line and load regulation using only ceramic input/output capacitors. Its internal 0.5-V reference and feedback comparator enable precise output regulation without external resistor dividers-unlike the adjustable TPS62220 variant.
At light loads, it transitions into pulse-frequency modulation (PFM) power-save mode, reducing switching frequency and quiescent current to 15 µA typical while maintaining ±3% output accuracy. The device supports 100% duty cycle operation below dropout conditions and integrates digital self-calibration to correct for line/load drift in discrete 1% output voltage steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.2 V ±3% over full load (0–400 mA) and input range (2.5–6 V) |
| Input Voltage Range | 2.5 V to 6 V - supports single-cell Li-ion (3.0–4.2 V) and regulated 3.3/5 V rails |
| Max Output Current | 400 mA continuous - sufficient for core supply of OMAP-L137, TMS320C55x DSPs |
| Switching Frequency | 1.25 MHz nominal (0.8–1.85 MHz range) - enables compact 4.7 µH inductor and 10 µF ceramic output cap |
| Quiescent Current | 15 µA typical in power-save mode - extends battery life in standby/sleep states |
| Efficiency Peak | 95% at mid-load - achieved via synchronous P/N-channel MOSFETs with rDS(on) ≤670 mΩ (P) / ≤540 mΩ (N) |
| Shutdown Current | 0.1 µA typical - ensures zero-load battery drain when EN = GND |
Pinout & Package
TPS62225DDCT uses the TSOT23-5 (DDC) package: 2.9 mm × 1.6 mm × 0.9 mm, 5-pin surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VI | Power Input | Accepts 2.5–6 V supply; connects to input capacitor (min 4.7 µF ceramic) and battery/regulator rail |
| 2 - GND | Ground Reference | Common return path for power and feedback; requires low-impedance PCB plane connection |
| 3 - EN | Enable Control | Logic-level input: high ≥1.3 V enables regulation; low ≤0.4 V forces shutdown (0.1 µA IQ) |
| 4 - FB | Feedback Sense | Internally connected to 2.2 V divider - no external resistors needed; must be shorted to output for stability |
| 5 - SW | Switch Node | Drives external 4.7 µH inductor; carries high di/dt; requires tight layout and Kelvin connection to minimize EMI |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Positioning | Maintains output 0.8% above nominal (2.218 V) at light load to absorb heavy transient drops without undershoot |
| Digital Self-Calibration | Adjusts duty cycle in 1% output voltage steps to hold ±3% tolerance across line/load/temperature without external compensation |
| Soft-Start | Staged switch-current ramp (83 → 167 → 335 → 670 mA) limits inrush, preventing input rail collapse on weak sources |
| 100% Duty Cycle Operation | Enables regulation down to VI = VO + IO × rDS(on)_max + IL × R_L - extends usable battery range to <2.5 V |
| Integrated Power-Save Mode | Automatically switches from 1.25-MHz PWM to variable-frequency PFM below ~66 mA load, sustaining >85% efficiency at 1 mA |
Applications
| Smartphone Application Processor Core Supply | Portable Media Player Audio Codec Supply |
|---|---|
Use Scenario: Powers ARM9/ARM11 core logic (e.g., OMAP-L137) requiring stable 2.2 V at up to 350 mA during video decode. IC Role / Device Role / Timing Role: Primary buck regulator providing clean, low-noise core voltage with fast transient response to CPU load spikes. Use Value: Dynamic voltage positioning reduces required output capacitance by 30% versus fixed-output converters, saving board space in 70-mm² smartphone modules. |
Use Scenario: Supplies 2.2 V bias to stereo audio DAC/ADC (e.g., TLV320AIC3106) in flash-based MP3 players. IC Role / Device Role / Timing Role: Low-quiescent-current DC-DC source enabling >20-hour playback on 500-mAh Li-ion battery. Use Value: 15 µA power-save IQ extends standby time by 4× compared to non-PFM buck regulators, critical for "instant-on" user experience. |
| WLAN PC Card Baseband IC Supply | Industrial Handheld Scanner Logic Rail |
Use Scenario: Delivers 2.2 V to IEEE 802.11b/g baseband SoC (e.g., TI WL1271) in mini-PCI express cards with thermal constraints. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter minimizing heat generation in confined card-edge slots. Use Value: 95% peak efficiency at 200 mA reduces thermal dissipation to <120 mW, eliminating need for heatsinking in plastic card enclosures. |
Use Scenario: Powers FPGA-configurable logic and barcode decoder ASIC in ruggedized handheld scanners operating from 3.7 V Li-ion packs. IC Role / Device Role / Timing Role: Robust buck regulator supporting 100% duty cycle down to 2.3 V input to maximize battery runtime per charge. Use Value: Undervoltage lockout (1.5–2.0 V threshold) prevents erratic operation during deep discharge, ensuring reliable scan completion before shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62224DDCT | Fixed 1.6 V output; identical package, pinout, and control architecture | Suitable where system logic requires 1.6 V I/O or core voltage instead of 2.2 V | Select when matching downstream voltage domain requirements - no layout change needed |
| TPS62228DDCT | Fixed 1.875 V output; same quiescent current, efficiency, and thermal specs | Better fit for OMAP3/AM35x memory I/O rails requiring 1.8 V ±3.5% | Prefer for designs targeting TI Sitara/OMAP3 platforms with tighter 1.8 V tolerance budgets |
Compared with TPS62225DDCT, TPS62224DDCT delivers lower output voltage for 1.6 V logic domains, while TPS62228DDCT offers finer granularity near standard 1.8 V rails-both retain identical thermal performance, package, and enable/feedback interface, making them drop-in alternatives only when output voltage alignment matches system requirements.
Availability
TPS62225DDCT is available at Aetrix Electronics and suitable for smartphone application processor core supplies, portable media player audio codec rails, WLAN PC card baseband ICs, and industrial handheld scanner logic rails requiring stable component supply with guaranteed long-term sourcing.
Supply support for TPS62225DDCT 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 power management technologies, with decades of expertise in high-efficiency DC-DC conversion for portable electronics.
The TPS6222x family-including TPS62225DDCT-is engineered for ultra-compact, battery-sensitive applications such as PDAs, smart phones, and portable media players, emphasizing minimal quiescent current, small solution size, and robust light-load efficiency.
FAQ
What is the output voltage tolerance of the TPS62225DDCT over temperature and load?
The TPS62225DDCT 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 current (0–400 mA), verified under input voltages from 2.5 V to 6 V. This specification is guaranteed by internal digital self-calibration that adjusts duty cycle in 1% output voltage steps to compensate for line and load drift.
Does the TPS62225DDCT require external feedback resistors?
No, the TPS62225DDCT does not require external feedback resistors. As a fixed-output variant, its internal feedback divider is factory-trimmed for 2.2 V and permanently enabled; the FB pin must be directly connected to the output node for regulation. External resistors are only used with the adjustable TPS62220DDCT variant.
What is the minimum recommended inductor value for the TPS62225DDCT?
The minimum recommended inductor value for the TPS62225DDCT is 4.7 µH, as specified in the datasheet's output filter design guidelines. Using smaller values risks instability and reduced efficiency due to increased ripple current and potential saturation; 4.7 µH paired with a 10 µF ceramic output capacitor achieves optimal phase margin and transient response.
How does the TPS62225DDCT behave during input voltage dropout?
When input voltage approaches the output level, the TPS62225DDCT enters 100% duty-cycle mode-holding the P-channel switch continuously on-to sustain regulation down to VI ≈ VO + IO × rDS(on)_max + IL × R_L. This extends usable battery life by extracting energy down to ~2.3 V input, with undervoltage lockout disabling operation only below 1.5 V.
Can the TPS62225DDCT be used in place of the TPS62220DDCT without circuit changes?
No, the TPS62225DDCT cannot directly replace the TPS62220DDCT without circuit changes. The TPS62220DDCT is adjustable (0.7–VI) and requires an external resistor divider on FB, while the TPS62225DDCT is fixed at 2.2 V with internal feedback. Swapping requires removing the divider network and verifying 2.2 V compatibility with downstream loads.
TPS62225DDCT 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
TPS62225DDCT FAQ
1.How can I place an order for TPS62225DDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62225DDCT 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 TPS62225DDCT reliable?
The price and inventory of TPS62225DDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62225DDCT is usually 5 days.
3.What payment methods are accepted for TPS62225DDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62225DDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62225DDCT?
TPS62225DDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62225DDCT 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 TPS62225DDCT?
For technical support, including TPS62225DDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62225DDCT requirements.
6.How does Aetrix verify that TPS62225DDCT is sourced from the original manufacturer or authorized distributors?
All TPS62225DDCT 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 TPS62225DDCT meets industry standards.
7.What is the process for return or replacement of TPS62225DDCT?
All TPS62225DDCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62225DDCT, 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 TPS62225DDCT part is unused and in its original packaging.
Return procedure for TPS62225DDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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