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Texas Instruments TPS630250RNCT
- Part No.:
- TPS630250RNCT
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
TPS630250RNCT.pdf
- Description:
- IC REG BCK BST ADJ 2A/4A 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:15,222
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Product details
Overview
TPS630250RNCT from Texas Instruments is a high-efficiency, adjustable-output synchronous buck-boost DC/DC converter in a 14-pin VQFN (RNC) package. It delivers up to 2 A continuous output current with 2.3 V–5.5 V input range, automatic buck/boost mode transition, and 2.5 MHz fixed-frequency PWM operation. It serves as the primary power regulation stage in battery-powered portable electronics requiring stable 3.3 V or programmable output under varying input conditions.
For engineers reviewing the TPS630250RNCT datasheet, TPS630250RNCT pinout, TPS630250RNCT application, or TPS630250RNCT equivalent, key selection criteria include its seamless buck-boost transition behavior, 35 µA quiescent current in PFM mode, integrated soft-start and output discharge, thermal/over-current protection, and compatibility with low-ESR ceramic output capacitors (≥20 µF).
Technical Context
The TPS630250RNCT implements average current-mode control using four internal N-channel MOSFETs-two for buck and two for boost paths-with one switch held on and one held off during each phase to minimize switching losses. Its control logic ensures no simultaneous four-switch operation, enabling true buck or boost topology depending solely on VIN vs. VOUT relationship.
It features dual supply rails (VIN for power stage, VINA for control circuitry) and segregated ground paths (PGND for power switches, GND for analog reference), requiring single-point PCB connection near GND to prevent ground shift. The PFM/PWM pin enables user-selectable light-load operation mode, directly affecting output ripple (≤30 mV pk-pk in PFM) and dynamic voltage positioning (+1.3% nominal in PFM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3 V to 5.5 V - supports single-cell Li-ion (2.7–4.2 V), Li-polymer, or 3.3 V/5 V rail inputs without external pre-regulation. |
| Output Current | 2 A continuous - sustained at VOUT = 3.3 V with VIN ≥ 2.5 V; enables direct powering of SoCs, RF modules, and display drivers. |
| Switching Frequency | 2.5 MHz typical - allows use of compact 1 µH inductors and minimizes EMI filtering requirements in space-constrained layouts. |
| Quiescent Current | 35 µA (typical) - extends battery runtime in always-on or low-duty-cycle applications such as wearables and IoT sensors. |
| Feedback Reference | 0.8 V ±1% - enables precise output programming via external resistor divider; supports 2.5 V–3.6 V adjustable range. |
| Efficiency | Up to 97% at VIN = VOUT - peak efficiency occurs in pass-through region, critical for minimizing heat in thermally constrained enclosures. |
| Soft-Start Time | 450 µs (buck), 700 µs (boost) - prevents inrush current and output overshoot during power-up with full 2 A load. |
| Shutdown Current | 0.1 µA (typical) - isolates load from source during system sleep, eliminating standby drain in battery-backed systems. |
Pinout & Package
TPS630250RNCT uses a 2.5 mm × 3 mm, 14-pin thermally enhanced VQFN (RNC) package with exposed thermal pad. Pin 7 (VINA) supplies control circuitry separately from high-current VIN (pins 4–6), while PGND (pin 2) and GND (pin 9) must be connected at a single point near pin 9 to maintain signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| L1 | Power inductor connection (buck path) | Connects to high-side buck FET source; requires low-inductance layout to minimize switching noise coupling. |
| L2 | Power inductor connection (boost path) | Connects to high-side boost FET source; shares same inductor with L1 in single-inductor buck-boost topology. |
| VIN | Main power input (pins 4,5,6) | Supplies power stage; must be decoupled with ≥10 µF ceramic capacitor close to pins to handle pulsed current demands. |
| VINA | Analog supply input (pin 7) | Powers error amplifier and control logic; requires separate 1 µF bypass cap to reject noise from power stage. |
| VOUT | Regulated output (pins 12,13,14) | Delivers final regulated voltage; connects to output capacitor bank (≥20 µF total) and load; routed with wide copper pour. |
| FB | Feedback input (pin 11) | Senses output via resistor divider; high-impedance node (10–100 nA bias) - sensitive to trace capacitance and noise. |
| EN | Enable control (pin 8) | Active-high logic input; must be pulled high (>1.2 V) to operate; floating state disables device - requires pull-up if uncontrolled. |
| PFM/PWM | Mode select (pin 10) | Low = automatic PFM/PWM transition; high = forced PWM only; open-circuit defaults to PFM - must not float. |
| PGND | Power ground (pin 2) | Return path for high-current switches; connects to thermal pad and inductor ground; isolated from analog GND until single-point tie. |
| GND | Analog ground (pin 9) | Reference for FB, EN, PFM/PWM, and internal regulators; tied to PGND at one location only, adjacent to pin 9. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck-boost transition | Seamless mode switching at VIN ≈ VOUT without output glitch or control loop instability - eliminates need for external supervision logic. |
| Integrated output discharge | 120 Ω internal discharge path activates on shutdown (EN low), discharging 20 µF output cap from 3.3 V to UVLO in <10 ms - prevents residual voltage hazards. |
| Thermal shutdown with hysteresis | Triggers at 140 °C junction temperature with 20 °C hysteresis - protects against sustained overload or poor heatsinking without oscillatory recovery. |
| True shutdown disconnect | Internal switches fully isolate load from VIN during EN = low - achieves 0.1 µA shutdown current and prevents backfeed into source. |
| Wide output capacitance support | Stable with 20–100 µF ceramic output caps - accommodates aging, DC bias, and temperature derating without external compensation. |
| Short-circuit protection | Limits input current to 4 A during output short - maintains safe operating area without latch-off, enabling auto-recovery after fault removal. |
Applications
| Smartphone Main Power Rail | Wearable Health Sensor Hub |
|---|---|
|
Use Scenario: Powers application processor, memory, and display backlight from a single 3.7 V Li-ion cell across full discharge curve (4.2 V → 2.8 V). IC Role / Device Role / Timing Role: Primary system regulator maintaining 3.3 V ±2% output while automatically transitioning between buck (4.2 V → 3.3 V) and boost (2.8 V → 3.3 V) modes. Use Value: Eliminates need for separate buck and boost ICs, reducing BOM count and PCB area by >40% versus dual-converter solutions. |
Use Scenario: Supplies ultra-low-power MCU, optical heart-rate sensor, and BLE radio in a coin-cell–powered fitness tracker. IC Role / Device Role / Timing Role: Adjustable-output buck-boost delivering 2.8 V at 150 mA peak, optimized for 35 µA quiescent current and 0.1 µA shutdown drain. Use Value: Extends battery life to >6 months per CR2032 cell by maintaining >90% efficiency down to 100 µA load in PFM mode. |
| Industrial Handheld Terminal | USB-C Powered Peripheral |
|
Use Scenario: Regulates 5 V USB input or 3.7 V battery to stable 3.3 V for FPGA, touchscreen controller, and barcode scanner ASIC. IC Role / Device Role / Timing Role: Dual-input capable regulator with seamless source switchover; handles 5 V→3.3 V buck and 3.7 V→3.3 V boost without firmware intervention. Use Value: Enables hot-swap battery replacement and USB host charging without system reset or brownout during transition. |
Use Scenario: Converts variable 5–20 V USB-C PD input to fixed 3.3 V for embedded microcontroller and USB interface logic. IC Role / Device Role / Timing Role: Wide-input buck-boost front-end accepting PD negotiation voltages; operates in buck mode above 3.3 V, boost below. Use Value: Supports universal USB-C compatibility without custom PD controller firmware - simplifies certification and reduces development time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS630252RNCT | Fixed 3.3 V output; identical package, pinout, and efficiency specs; no FB pin or external divider required. | Eliminates resistor network but lacks output adjustability; suitable only where 3.3 V is mandatory and non-negotiable. | Select when board space is critical and output voltage is fixed - saves two resistors and routing, but forfeits design flexibility. |
| MAX77827BEWC+T | 2.5 V–5.5 V input; 2 A output; 2.2 MHz switching; requires external compensation; no integrated discharge function. | Higher thermal resistance (RθJA = 85 °C/W vs. 69.2 °C/W); lacks PFM/PWM pin control and true shutdown disconnect. | Choose only if legacy MAXIM ecosystem integration is required; otherwise TPS630250RNCT offers superior thermal performance and feature completeness. |
Compared with TPS630252RNCT, the TPS630250RNCT provides output voltage flexibility at minor BOM cost; compared with MAX77827BEWC+T, it delivers lower thermal impedance, integrated discharge, and simpler layout - making it preferable for high-reliability portable designs.
Availability
TPS630250RNCT is available at Aetrix Electronics and suitable for smartphone power management, wearable health monitoring, industrial handheld terminals, USB-C powered peripherals, and battery-backed IoT edge nodes requiring stable component supply across long production lifecycles.
Supply support for TPS630250RNCT 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 electronic components.
The TPS63025x product line was designed specifically for space-constrained, battery-powered portable electronics requiring high-efficiency, wide-input buck-boost regulation with minimal external components and robust protection features.
FAQ
What is the maximum continuous output current capability of the TPS630250RNCT?
The TPS630250RNCT delivers up to 2 A continuous output current when VIN ≥ 2.5 V and VOUT = 3.3 V, as specified in the Recommended Operating Conditions table. This rating assumes proper thermal management using the exposed thermal pad and adheres to the 125 °C maximum junction temperature limit. Peak currents exceeding 2 A are possible in short bursts under specific buck-mode conditions, but sustained operation must remain within the 2 A continuous limit to ensure reliability.
Does the TPS630250RNCT require external compensation components?
No, the TPS630250RNCT uses internal compensation and does not require external compensation components. Its average current-mode control architecture is factory-tuned for stability with standard 1 µH inductors and ≥20 µF ceramic output capacitors. Layout best practices - including tight PGND/GND tie, short FB trace, and proper input/output decoupling - are sufficient to ensure robust transient response and loop stability across all operating conditions.
How does the PFM/PWM pin affect output voltage accuracy and ripple on the TPS630250RNCT?
When the PFM/PWM pin is low, the TPS630250RNCT enters Power Save Mode, reducing switching frequency and quiescent current but increasing output voltage ripple to ≤30 mV pk-pk (typical) and shifting nominal output +1.3% for dynamic voltage positioning. When high, it forces fixed 2.5 MHz PWM operation, achieving tighter regulation (±1% FB accuracy) and lower ripple (<10 mV pk-pk), at the cost of higher light-load quiescent current (70 µA vs. 35 µA).
Can the TPS630250RNCT operate with a single 1 µH inductor, and what are the recommended specifications?
Yes, the TPS630250RNCT is designed for single-inductor buck-boost operation. TI recommends a 1 µH shielded power inductor rated for ≥4.5 A saturation current and ≤34 mΩ DCR (e.g., Coilcraft XAL4020-102ME or Würth 74438334010). Inductor selection directly impacts efficiency, thermal rise, and transient response - lower DCR improves heavy-load efficiency, while higher Isat prevents saturation during peak current events.
What protection features are integrated into the TPS630250RNCT?
The TPS630250RNCT integrates over-temperature shutdown (140 °C with 20 °C hysteresis), cycle-by-cycle over-current limiting (4 A average input current limit), undervoltage lockout (1.7 V threshold with 180 mV hysteresis), short-circuit protection (limits current if VOUT < 1.2 V), and true shutdown with output capacitor discharge (120 Ω internal path). These functions operate autonomously without external components or firmware intervention.
TPS630250RNCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.3V
- Voltage - Output (Max):
- 3.6V
- Current - Output:
- 2A, 4A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-VQFN-HR (3x2.5)
TPS630250RNCT FAQ
1.How can I place an order for TPS630250RNCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS630250RNCT 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 TPS630250RNCT reliable?
The price and inventory of TPS630250RNCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS630250RNCT is usually 5 days.
3.What payment methods are accepted for TPS630250RNCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS630250RNCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS630250RNCT?
TPS630250RNCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS630250RNCT 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 TPS630250RNCT?
For technical support, including TPS630250RNCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS630250RNCT requirements.
6.How does Aetrix verify that TPS630250RNCT is sourced from the original manufacturer or authorized distributors?
All TPS630250RNCT 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 TPS630250RNCT meets industry standards.
7.What is the process for return or replacement of TPS630250RNCT?
All TPS630250RNCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS630250RNCT, 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 TPS630250RNCT part is unused and in its original packaging.
Return procedure for TPS630250RNCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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