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Texas Instruments TPS630251YFFT
- Part No.:
- TPS630251YFFT
- Manufacturer:
- Texas Instruments
- Package:
- 20-UFBGA, DSBGA
- Datasheet:
-
TPS630251YFFT.pdf
- Description:
- IC REG BCK BST 2.9V 3.5A 20DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:340
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Product details
Overview
TPS630251YFFT from Texas Instruments is a fixed-output 2.9 V, high-efficiency synchronous buck-boost DC/DC converter in a 20-pin DSBGA package. It delivers up to 2 A continuous output current with 2.3 V to 5.5 V input range, 95% peak efficiency in buck or boost mode, and seamless automatic mode transition-ideal for single-cell Li-ion powered portable electronics requiring stable rail regulation across battery discharge.
For engineers reviewing the TPS630251YFFT datasheet, TPS630251YFFT pinout, TPS630251YFFT application, or TPS630251YFFT equivalent, key selection criteria include its fixed 2.9 V output, 35 µA quiescent current, 2.5 MHz switching frequency, integrated soft start, and true shutdown with output capacitor discharge function.
Technical Context
The TPS630251YFFT implements average current-mode control using four internal N-channel MOSFETs, enabling real buck or boost operation with automatic and seamless transition between modes based on VIN vs. VOUT relationship. It operates as a buck converter when VIN > VOUT and as a boost converter when VIN < VOUT-never switching all four FETs simultaneously.
Its dual-supply architecture separates power (VIN, PGND) and control (VINA, GND) domains to minimize ground shift, while the PFM/PWM pin enables user-selectable light-load operation mode. Thermal shutdown triggers at 140°C with 20°C hysteresis, and undervoltage lockout activates below 1.7 V with 180 mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.9 V ±1% in PWM mode; supports dynamic voltage positioning for transient response |
| Input Voltage Range | 2.3 V to 5.5 V-covers full discharge curve of single-cell Li-ion (3.0–4.2 V nominal) |
| Continuous Output Current | 2 A at VIN ≥ 2.5 V-enables direct powering of SoCs, RF modules, and display drivers |
| Switching Frequency | 2.5 MHz typical-permits use of compact 1 µH inductors and low-ESR ceramic capacitors |
| Quiescent Current | 35 µA typical-extends battery runtime in always-on sensor or standby subsystems |
| Efficiency | Up to 95% in buck or boost mode; 97% when VIN = VOUT-minimizes thermal load in space-constrained layouts |
| Shutdown Current | 0.1 µA typical-ensures negligible battery drain during system sleep or off-state |
Pinout & Package
TPS630251YFFT uses a 1.766 mm × 2.086 mm, 20-pin DSBGA (YFF) package with ball pitch of 0.4 mm. The package integrates thermal vias under the exposed die pad for enhanced PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (E1–E3) | Power Input | Supplies high-current path to power stage; must be decoupled with low-ESR ceramic capacitor near pins |
| VINA (E4) | Analog Supply | Provides clean bias for control circuitry; requires separate local decoupling from VIN |
| PGND (C1–C3) | Power Ground | Return path for switch currents; connects directly to power inductor and output capacitor negative terminal |
| GND (C4) | Analog Ground | Reference for feedback, enable, and PFM/PWM logic; tied to PGND at single point near GND pin |
| L1 (D1–D3), L2 (B1–B3) | Inductor Connections | Dual inductor terminals enable interleaved or split-inductor configurations; each handles half-switching current |
| VOUT (A1–A3) | Regulated Output | Delivers fixed 2.9 V; connects to output capacitor bank and load; includes internal discharge transistor |
| EN (D4) | Enable Control | Active-high digital input; rising edge initiates soft-start; falling edge enables true shutdown and output discharge |
| PFM/PWM (B4) | Mode Selection | Low = automatic PFM/PWM transition; high = forced PWM; must not float-requires pull-up/down resistor |
Key Features
| Feature | Design Value |
|---|---|
| Seamless Buck-Boost Transition | Automatic mode switching without output glitch or dropout-maintains regulation during VIN crossing VOUT |
| Integrated Soft Start | Monotonic output voltage ramp with 450–700 µs time depending on operating mode-prevents inrush and overshoot |
| Output Capacitor Discharge | 120 Ω internal discharge path activated during shutdown-fully discharges 20 µF output cap in <10 ms |
| Over-Temperature Protection | Thermal shutdown at 140°C junction temperature with 20°C hysteresis-prevents permanent damage under sustained overload |
| Wide Capacitance Support | Validated with 20 µF minimum output capacitance using standard X5R/X7R ceramics-reduces BOM count and layout area |
Applications
| Smartphone Baseband Power | Wearable Sensor Hub |
|---|---|
Use Scenario: Powers baseband processor and RF transceiver in smartphones where battery voltage drops from 4.2 V to 2.8 V during discharge. IC Role / Device Role / Timing Role: Primary buck-boost regulator delivering stable 2.9 V rail independent of battery state. Use Value: Eliminates need for separate buck and boost converters; maintains 2 A delivery across full battery range with <50 mV PFM ripple. | Use Scenario: Supplies ultra-low-power MCU and environmental sensors in compact fitness trackers with coin-cell or micro-LiPo batteries. IC Role / Device Role / Timing Role: Always-on power management IC providing regulated 2.9 V from 2.3–3.6 V input. Use Value: 35 µA quiescent current extends multi-week battery life; true shutdown reduces leakage to 0.1 µA during deep sleep. |
| Portable Medical Monitor | USB-C PD Accessory |
Use Scenario: Powers ECG front-end analog circuitry and BLE radio in handheld diagnostic devices with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Precision voltage source ensuring ADC reference stability and signal chain integrity. Use Value: 1% output accuracy and <5 mV/A load regulation preserve measurement fidelity across varying load conditions. | Use Scenario: Generates 2.9 V auxiliary rail for USB-C port controller and level-shifting logic in compact adapters. IC Role / Device Role / Timing Role: Secondary regulator converting 5 V USB-PD input to fixed 2.9 V logic supply. Use Value: 2.5 MHz switching allows miniature 1 µH inductor; 20-pin DSBGA fits tight board areas near connector interface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS630252YFFT | Fixed 3.3 V output; identical package, pinout, and electrical specs except VOUT | Requires redesign of downstream logic voltage levels; not drop-in for 2.9 V systems | Select only if target load requires 3.3 V and board layout permits no change to feedback network |
| MAX77827BEWL+T | 2.5 V to 5.5 V input; adjustable 0.6–3.7 V output; 2.2 MHz switching; 2.5 A max output | Requires external resistor divider; lacks integrated output discharge; different pinout and package (16-bump WLP) | Choose when adjustable output or higher current headroom is needed, accepting added design complexity |
Compared with TPS630251YFFT, TPS630252YFFT offers identical performance but targets 3.3 V loads, while MAX77827BEWL+T provides flexibility at the cost of external components and no discharge function-making TPS630251YFFT optimal for fixed 2.9 V, space-constrained, battery-critical designs.
Availability
TPS630251YFFT is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor hubs, portable medical monitors, and USB-C PD accessories requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TPS630251YFFT 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 over 90 years of innovation in high-reliability silicon solutions.
The TPS63025x product line was designed specifically for battery-powered portable electronics needing high-efficiency, wide-input buck-boost conversion in ultra-small packages-targeting smartphones, wearables, and IoT endpoints.
FAQ
What is the output voltage tolerance of the TPS630251YFFT under PWM mode?
The TPS630251YFFT has a fixed 2.9 V output with ±1% accuracy under PWM mode at TA = 25°C, specified as 2.871 V to 2.929 V. This tolerance holds across input voltages from 2.3 V to 5.5 V and load currents up to 2 A, ensuring reliable operation for precision 2.9 V logic rails. The TPS630251YFFT maintains this specification via internal trimming and feedback loop calibration during manufacturing.
Does the TPS630251YFFT support forced PWM operation, and how is it enabled?
Yes, the TPS630251YFFT supports forced PWM operation via the PFM/PWM pin (B4). Driving this pin high forces continuous 2.5 MHz switching regardless of load current, eliminating PFM-mode voltage ripple. The pin must not be left floating-TI recommends a 100 kΩ pull-up to VINA for default PWM mode. This capability ensures predictable EMI behavior and consistent transient response in noise-sensitive applications using the TPS630251YFFT.
How does the TPS630251YFFT handle output capacitor discharge during shutdown?
When the EN pin is pulled low, the TPS630251YFFT activates an internal 120 Ω discharge transistor between VOUT and PGND. This path fully discharges a 20 µF output capacitor from 2.9 V to UVLO threshold (<1.7 V) in under 10 ms. The discharge function only operates when VIN remains applied-ensuring safe, rapid rail collapse for sequencing-critical systems. This feature is integral to the TPS630251YFFT's true shutdown architecture.
What is the recommended inductor value for the TPS630251YFFT, and why?
Texas Instruments recommends a 1 µH inductor for the TPS630251YFFT, such as Coilcraft XAL4020-102ME (4.5 A saturation current, 10 mΩ DCR). This value balances ripple current, efficiency, transient response, and physical size-supporting 2 A continuous output while maintaining >95% efficiency across input range. Lower values increase ripple and conduction loss; higher values slow load step recovery. The TPS630251YFFT's 2.5 MHz switching frequency makes 1 µH optimal for compact, high-performance designs.
Can the TPS630251YFFT operate with input voltage below 2.3 V?
No-the TPS630251YFFT has a recommended minimum input voltage of 2.3 V per datasheet Section 8.3. Below this, undervoltage lockout (UVLO) disables operation at ~1.7 V with 180 mV hysteresis. Attempting operation below 2.3 V risks unstable regulation, reduced efficiency, or failure to start. For sub-2.3 V inputs, consider TI's TPS63802 or alternative ultra-low-VIN buck-boost converters-not the TPS630251YFFT.
TPS630251YFFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-UFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.9V
- Voltage - Output (Max):
- -
- Current - Output:
- 3.5A (Switch)
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DSBGA
TPS630251YFFT FAQ
1.How can I place an order for TPS630251YFFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS630251YFFT 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 TPS630251YFFT reliable?
The price and inventory of TPS630251YFFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS630251YFFT is usually 5 days.
3.What payment methods are accepted for TPS630251YFFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS630251YFFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS630251YFFT?
TPS630251YFFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS630251YFFT 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 TPS630251YFFT?
For technical support, including TPS630251YFFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS630251YFFT requirements.
6.How does Aetrix verify that TPS630251YFFT is sourced from the original manufacturer or authorized distributors?
All TPS630251YFFT 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 TPS630251YFFT meets industry standards.
7.What is the process for return or replacement of TPS630251YFFT?
All TPS630251YFFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS630251YFFT, 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 TPS630251YFFT part is unused and in its original packaging.
Return procedure for TPS630251YFFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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