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Texas Instruments TPS62229DDCRG4
- Part No.:
- TPS62229DDCRG4
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS62229DDCRG4.pdf
- Description:
- IC REG BUCK 1.7V 400MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,951
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Product details
Overview
TPS62229DDCRG4 from Texas Instruments is a 400-mA, 1.25-MHz synchronous step-down DC/DC converter in TSOT23-5 package, delivering fixed 1.7 V output from 2.5–6 V input. It features 15 µA quiescent current in power-save mode, 95% peak efficiency, and dynamic output-voltage positioning for transient response in portable power rails.
For engineers reviewing the TPS62229DDCRG4 datasheet, TPS62229DDCRG4 pinout, TPS62229DDCRG4 application, or TPS62229DDCRG4 equivalent, key selection criteria include fixed 1.7 V output accuracy (±3%), 100% duty-cycle low-dropout operation, soft-start control, and compatibility with 4.7 µH inductors and ceramic output capacitors.
Technical Context
The TPS62229DDCRG4 uses voltage-mode PWM control with input voltage feed-forward for fast line/load regulation. Its internal 0.5 V reference and fixed 1.25 MHz oscillator enable stable operation across 2.5–6 V input while maintaining ±3% output voltage tolerance over load and temperature.
At light loads, it transitions to pulse-frequency modulation (PFM) power-save mode, reducing switching frequency and quiescent current to 15 µA typical. Dynamic voltage positioning holds output 0.8% above nominal during light load to minimize voltage droop during sudden load steps to 400 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.7 V ±3% - ensures stable core supply for low-voltage DSPs and processors without external feedback resistors. |
| Input Voltage Range | 2.5 V to 6 V - supports single-cell Li-ion (2.7–4.2 V), 3-cell NiMH (3.6 V), and standard 3.3 V/5 V rails. |
| Max Output Current | 400 mA - sufficient for powering TMS320 DSP cores, OMAP subsystems, or baseband processors in handheld devices. |
| Switching Frequency | 1.25 MHz typical - enables use of small 4.7 µH inductors and 10–22 µF ceramic output capacitors for compact PCB layout. |
| Quiescent Current | 15 µA typical in power-save mode - extends battery life in standby or low-activity states of portable media players and smart phones. |
| Efficiency Peak | 95% - achieved at medium load with 3.6 V input and 1.7 V output, minimizing thermal stress in thin-SOT23 package. |
| Duty Cycle | 100% - maintains regulation down to VIN = VOUT + IOUT × rDS(on)_PCH + IL × R_L, extending usable battery range. |
Pinout & Package
TSOT23-5 package: 2.9 mm × 1.6 mm × 0.9 mm, thermally enhanced with exposed pad (not electrically connected). Pin 1 marked by dot; top-view orientation per TI SLVS491E.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VI | Power input | Accepts 2.5–6 V supply; requires 4.7 µF ceramic input capacitor close to pin for stability and EMI reduction. |
| 2 - GND | Ground reference | System ground return path; must be low-impedance connection to minimize noise coupling into FB and EN pins. |
| 3 - EN | Enable control | Active-high logic input; pulled high to VI enables regulation; pulled low to GND disables output and reduces IQ to 0.1 µA. |
| 4 - FB | Feedback sense | Internally tied to 1.7 V output; no external resistor divider needed - simplifies layout and eliminates feedback error sources. |
| 5 - SW | Switch node | Connects to inductor; carries high di/dt switching current - requires short, wide trace and tight loop with GND and output capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Output-Voltage Positioning | Maintains output 0.8% above nominal during light load, reducing voltage droop to <100 mV during 50–400 mA transients without oversized output capacitance. |
| Soft Start | Digital current-step ramp (83/167/335/670 mA) limits inrush current, preventing input rail collapse when powered from weak sources like coin cells or aging batteries. |
| Internal Digital Self-Calibration | Adjusts duty cycle in ~1% digital steps when output deviates >±1.6% from target, achieving near-zero line/load regulation error without external compensation components. |
| 100% Duty-Cycle Low-Dropout Mode | Enables full utilization of battery voltage down to VOUT + IOUT × rDS(on)_PCH + IL × R_L, extending runtime in Li-ion discharge tail below 3.0 V. |
| Thermal Protection | Shuts down if junction temperature exceeds 150°C; resumes after cooldown - protects device during sustained overload or poor PCB thermal design. |
Applications
| Smartphone Baseband Power | Portable Media Player Core Supply |
|---|---|
Use Scenario: Powers ARM-based application processor core in smartphone during active UI navigation and background sync. IC Role / Device Role / Timing Role: Primary 1.7 V core regulator delivering up to 400 mA with fast transient response to CPU burst loads. Use Value: Dynamic voltage positioning and 1.25 MHz switching minimize output capacitor size to 10 µF while maintaining <80 mV droop during 100–400 mA load steps. | Use Scenario: Supplies DSP audio codec and NAND flash controller in portable media player during MP3 decode and file transfer. IC Role / Device Role / Timing Role: Fixed-output buck converter providing clean, low-noise 1.7 V rail isolated from noisy USB or battery inputs. Use Value: 15 µA quiescent current in PFM mode extends playback time by >12% versus non-power-save alternatives during pause or standby. |
| OMAP™ Subsystem Rail | PDA Application Processor Core |
Use Scenario: Generates 1.7 V core voltage for OMAP L137 or similar low-power applications processors in industrial handheld terminals. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator supporting dynamic voltage scaling (DVS) via EN pin control. Use Value: 100% duty-cycle operation sustains regulation down to 2.7 V input, enabling full battery discharge from 4.2 V to 2.5 V without brownout. | Use Scenario: Powers TI TMS320C55x DSP core in personal digital assistant during handwriting recognition and wireless sync. IC Role / Device Role / Timing Role: Compact, low-profile DC/DC solution replacing discrete LDOs where 400 mA current and efficiency are critical. Use Value: TSOT23-5 footprint (2.9 × 1.6 mm) saves >60% board area versus SOIC-8 alternatives while maintaining thermal performance via exposed pad. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62222DDCR | Fixed 1.8 V output; otherwise identical architecture, pinout, and specs. | Requires system-level voltage margin adjustment - not drop-in for 1.7 V logic domains. | Select only if target SoC accepts 1.8 V ±3% instead of 1.7 V; same PCB layout and BOM except output cap value. |
| TPS62224DDCR | Fixed 1.6 V output; identical package, EN/FB/SW/GND pin mapping and thermal rating. | Suitable for lower-core-voltage DSPs (e.g., select C674x variants); may require revalidation of power sequencing. | Prefer when migrating to newer 1.6 V core standards; verify startup timing and dropout behavior under worst-case VIN min. |
Compared with TPS62229DDCRG4, TPS62222DDCR provides 100 mV higher output for margin-sensitive interfaces, while TPS62224DDCR offers tighter core voltage alignment for next-gen low-power processors - both share identical thermal, layout, and control characteristics but require voltage-specific validation.
Availability
TPS62229DDCRG4 is available at Aetrix Electronics and suitable for smartphone baseband power, portable media player core supply, and OMAP™ subsystem rail applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.
Supply support for TPS62229DDCRG4 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 ICs, with decades of expertise in high-efficiency DC/DC conversion for portable electronics.
The TPS6222x product line was designed specifically for space-constrained, battery-powered applications demanding high efficiency across wide load ranges - including PDAs, smart phones, and portable media players - using synchronous rectification and advanced power-save modes.
FAQ
What is the output voltage tolerance of the TPS62229DDCRG4 over temperature and load?
The TPS62229DDCRG4 maintains a fixed 1.7 V output with ±3% tolerance across the full operating ambient temperature range (−40°C to 85°C) and full 0–400 mA load range, as verified in electrical characteristics tables under VI = 2.5 V to 6 V conditions. This specification includes initial accuracy, line regulation (0.26%/V), and load regulation (0.0014%/mA) contributions.
Does the TPS62229DDCRG4 require external feedback resistors to set its output voltage?
No, the TPS62229DDCRG4 does not require external feedback resistors. It is a fixed-output variant with internal feedback network configured for 1.7 V. The FB pin is internally connected to the regulated output, eliminating resistor matching errors and layout sensitivity - unlike the adjustable TPS62220 version which requires an external R1/R2 divider.
What is the minimum input voltage required for the TPS62229DDCRG4 to maintain regulation at 400 mA output?
The minimum input voltage for regulation at 400 mA depends on output voltage, MOSFET on-resistance, and inductor DCR. For TPS62229DDCRG4 delivering 1.7 V/400 mA, VI(min) ≈ 1.7 V + 0.4 A × 0.67 Ω (max PCH rDS(on) at 2.5 V) + IL × RL. With typical 4.7 µH inductor (DCR ≈ 80 mΩ), VI(min) ≈ 1.97 V - confirmed by 100% duty-cycle capability down to VIN = VOUT under heavy load.
Can the TPS62229DDCRG4 be used with a 2.2 µF output capacitor?
No - the TPS62229DDCRG4 requires ≥10 µF ceramic output capacitance for stable operation with 4.7 µH inductors. Using 2.2 µF violates the recommended L×C corner frequency design rule (target ~15.9 kHz), risking instability, excessive output ripple (>50 mV), and degraded transient response. TI specifies ≥10 µF for VO > 2 V and ≥22 µF for VO ≤ 2 V; 1.7 V falls in the latter category.
How does the TPS62229DDCRG4 enter and exit power-save mode?
The TPS62229DDCRG4 enters power-save mode automatically when load current drops below ~66 mA (skip current threshold), switching from fixed 1.25 MHz PWM to variable-frequency PFM with 15 µA quiescent current. It exits PFM and resumes PWM when output voltage falls below the "comp low 2" threshold (~0.8% below nominal), ensuring seamless transition without output glitches or sequencing delays.
TPS62229DDCRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 1.7V
- 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
TPS62229DDCRG4 FAQ
1.How can I place an order for TPS62229DDCRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62229DDCRG4 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 TPS62229DDCRG4 reliable?
The price and inventory of TPS62229DDCRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62229DDCRG4 is usually 5 days.
3.What payment methods are accepted for TPS62229DDCRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62229DDCRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62229DDCRG4?
TPS62229DDCRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62229DDCRG4 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 TPS62229DDCRG4?
For technical support, including TPS62229DDCRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62229DDCRG4 requirements.
6.How does Aetrix verify that TPS62229DDCRG4 is sourced from the original manufacturer or authorized distributors?
All TPS62229DDCRG4 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 TPS62229DDCRG4 meets industry standards.
7.What is the process for return or replacement of TPS62229DDCRG4?
All TPS62229DDCRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62229DDCRG4, 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 TPS62229DDCRG4 part is unused and in its original packaging.
Return procedure for TPS62229DDCRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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