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Texas Instruments TPS62480RNCT
- Part No.:
- TPS62480RNCT
- Manufacturer:
- Texas Instruments
- Package:
- 16-VFQFN
- Datasheet:
-
TPS62480RNCT.pdf
- Description:
- IC REG BUCK ADJ 6A DL 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:687
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Product details
Overview
TPS62480RNCT from Texas Instruments is a synchronous 2-phase step-down DC-DC converter delivering up to 6 A continuous output current (3 A per phase) with input voltage range 2.4 V to 5.5 V and adjustable output voltage from 0.6 V to 5.5 V. It features dual-phase peak-current-mode control, 2.2 MHz typical switching frequency, ±1% feedback voltage accuracy in PWM mode, and integrated power-good and thermal-good open-drain outputs. It serves as a compact point-of-load regulator in space-constrained SSDs and optical modules.
For engineers reviewing the TPS62480RNCT datasheet, TPS62480RNCT pinout, TPS62480RNCT application, or TPS62480RNCT equivalent, key selection considerations include its 3 × 2.5 mm HotRod™ VQFN-16 (RNC) package, phase-shifting for reduced input ripple, automatic phase shedding below ~1.7 A load, active output discharge via VO pin, and dual-output voltage selection via VSEL pin with external resistor RS.
Technical Context
The TPS62480RNCT implements a predictive OFF-time, peak-current-mode control architecture with two identical, adaptively delayed phases sharing one outer voltage loop and independent inner current loops. Each phase regulates to the same VOUT setpoint using cycle-by-cycle peak current sensing and internal compensation - eliminating need for external loop compensation components.
It supports three functional modes: forced PWM (MODE = High), automatic PWM/PSM transition (MODE = Low), and 100% duty-cycle operation when VIN approaches VOUT. Phase add/shed logic activates the second phase above ~1.7 A load with ~0.5 A hysteresis, while thermal good (TG) asserts low at 120°C junction temperature and power good (PG) monitors VOUT within ±1% (PWM mode) with 93–99% rising/falling thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4 V to 5.5 V - supports direct operation from 3.3-V or 5-V rails and backup supplies down to 2.4 V. |
| Output Current | 6 A continuous - delivered by two balanced 3-A phases, enabling smaller inductors and lower RMS input current. |
| Switching Frequency | Typ. 2.2 MHz - enables use of compact 470-nH inductors and ceramic capacitors without external frequency setting. |
| Feedback Accuracy | ±1% (PWM mode, –20°C to 85°C) - ensures tight regulation for sensitive core voltages like CPU I/O or FPGA banks. |
| Quiescent Current | 23 µA (typ.) - maintains high light-load efficiency in always-on subsystems such as sensor hubs or standby power rails. |
| Package | VQFN-16 (RNC), 3.0 × 2.5 mm - HotRod™ construction minimizes parasitic inductance for clean switching and thermal performance. |
| Protection Features | UVLO (2.3 V threshold), overcurrent foldback, thermal shutdown (160°C), and active output discharge - reduces need for external fault management circuitry. |
Pinout & Package
VQFN-16 (RNC) package, 3.0 mm × 2.5 mm body size, exposed thermal pad on bottom side, RoHS-compliant, moisture sensitivity level 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1, SW2 | Switch node (Phase 1 & 2) | Connects to internal high-side/low-side MOSFETs; requires low-inductance layout to minimize switching loss and EMI. |
| VIN1, VIN2 | Power input (Phase 1 & 2) | Separate inputs allow independent decoupling per phase; improves transient response and reduces shared impedance noise. |
| PGND1, PGND2 | Power ground (Phase 1 & 2) | Dedicated ground returns per phase reduce ground bounce and improve current balance between phases. |
| FB | Feedback input | Senses output voltage via resistive divider; regulated to 0.6 V reference with ±1% accuracy in PWM mode. |
| VSEL | Output voltage select | Logic input that enables second output voltage (VOUT2) by connecting external resistor RS between FB and RS pins. |
| MODE | Operating mode control | High = forced PWM; Low = automatic PWM/PSM transition - critical for noise-sensitive or constant-frequency applications. |
| SS/TR | Soft-start / tracking | Capacitor sets startup slew rate; also accepts external voltage for power-rail sequencing or tracking applications. |
| PG, TG | Open-drain status outputs | PG indicates VOUT in regulation (93–99% window); TG signals junction temp <120°C - both require external pull-up resistors. |
| VO | Active discharge control | Internally connects discharge FET to VOUT when EN is low - discharges output at ~120 mA (at VOUT ≥1 V) to prevent back-powering. |
| AGND | Analog ground | Reference for FB, RS, and internal error amplifier - must be routed separately from PGND and tied at single point. |
| RS | Resistor select | Connects external resistor to set VOUT2 when VSEL = High; internal 10–50 Ω resistance defines bias current path. |
| EN | Enable input | Active-high logic control (VIH ≥1.2 V, VIL ≤0.4 V); internal pull-down ensures safe default-off state if left floating. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-phase current-mode topology | Enables 6-A output with 470-nH inductors and 4×22-µF output capacitance - reduces solution footprint vs single-phase alternatives. |
| Phase-shifted operation | Reduces input RMS current by ~30% and cuts input capacitor ripple current - lowers required Cin rating and EMI filtering complexity. |
| Automatic phase add/shed | Operates single-phase below ~1.7 A load, improving light-load efficiency without manual mode control or external sequencing logic. |
| Adjustable soft start & tracking | SS/TR pin accepts external capacitor (for controlled ramp) or external voltage (for rail sequencing), supporting multi-rail power-up coordination. |
| Active output discharge | VO pin sinks ~120 mA when disabled - prevents residual VOUT from interfering with downstream logic or violating reset timing in hot-swap systems. |
| Thermal Good (TG) output | Asserts low at 120°C junction temperature - enables system-level thermal throttling before reaching 160°C shutdown threshold. |
Applications
| Solid State Drives (SSDs) | Optical Modules & CMOS Cameras |
|---|---|
Use Scenario: Regulating 1.2 V or 1.8 V core voltage for NAND flash controllers and DRAM buffers in M.2/U.2 SSDs with strict height limits. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 6 A with <1% output voltage tolerance and fast transient response to burst read/write loads. Use Value: Dual-phase architecture minimizes inductor height (<1.2 mm) and eliminates need for external compensation, enabling ultra-low-profile PCB designs. | Use Scenario: Powering laser diode drivers and image sensor analog front-ends in compact optical transceivers and embedded camera modules. IC Role / Device Role / Timing Role: Dual-rail capable regulator supplying separate 3.3 V (I/O) and 1.2 V (core) rails via VSEL-controlled voltage switching during mode transitions. Use Value: VSEL + RS pin configuration allows dynamic voltage scaling without firmware intervention, reducing power consumption during idle states. |
| Ultra-Portable/Tablet Systems | Wireless Modules & Network Cards |
Use Scenario: Providing stable 0.85 V–1.1 V processor I/O and memory interface rails in fanless tablets where thermal headroom is limited. IC Role / Device Role / Timing Role: High-efficiency 2-phase buck converter operating in automatic PSM mode during sleep states and forced PWM during compute bursts. Use Value: 23 µA quiescent current and phase shedding extend battery life; TG output feeds system thermal manager to throttle CPU before shutdown. | Use Scenario: Supplying 1.8 V and 3.3 V rails for Wi-Fi 6/6E baseband ICs and RF front-end modules in mini-PCIe and M.2 wireless cards. IC Role / Device Role / Timing Role: Input-filter-optimized regulator handling wide VIN (2.4–5.5 V) from varying host supply conditions while maintaining tight load regulation. Use Value: UVLO (2.3 V) and 100% duty-cycle capability ensure reliable operation during brownout events on shared motherboard power rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-phase step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62480RNC | Same die, identical electrical specs; RNC is TI's official orderable package designation - RNCT is tape-and-reel variant of RNC. | No functional difference; RNCT denotes 250-unit reel packaging for automated SMT assembly. | Select TPS62480RNCT for production line compatibility with pick-and-place feeders requiring tape-and-reel format. |
| TPS62424RGET | Single-phase 3-A converter in 3 × 3 mm VQFN-16; lacks phase-shifting, VSEL, TG, and active discharge; 1.8-MHz switching, 25-µA IQ. | Suitable only for ≤3-A loads; cannot replace TPS62480RNCT in 6-A or dual-voltage applications without redesign. | Consider only for cost-sensitive, lower-current designs where dual-phase benefits are unnecessary. |
Compared with TPS62480RNCT, TPS62480RNC offers identical performance in tray packaging, while TPS62424RGET provides half the current capability in a functionally reduced single-phase implementation - neither is pin-compatible, and only the RNC variant shares full electrical and thermal equivalence.
Availability
TPS62480RNCT is available at Aetrix Electronics and suitable for solid-state drives, optical modules, ultra-portable computing platforms, and wireless infrastructure equipment requiring stable component supply, long-term manufacturability, and automotive-grade reliability screening.
Supply support for TPS62480RNCT 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 ICs, embedded processors, and digital signal processors for industrial, automotive, and consumer markets.
The TPS62480RNCT belongs to TI's high-density DC-DC converter product line targeting low-profile point-of-load applications - engineered specifically for space-constrained, high-efficiency power delivery in SSDs, optical transceivers, and portable electronics.
FAQ
What is the recommended input capacitor configuration for TPS62480RNCT?
TI recommends two 22-µF, 10-V X5R ceramic capacitors (0603 case) placed close to VIN1 and VIN2 pins respectively. This split-input approach minimizes shared impedance between phases, reduces input ripple current per capacitor, and improves high-frequency decoupling. The total effective input capacitance should be ≥44 µF with low ESL layout - critical for stable operation across the 2.4–5.5 V input range and 2.2 MHz switching frequency of the TPS62480RNCT.
Does TPS62480RNCT support pre-biased output startup?
Yes, the TPS62480RNCT supports pre-biased output startup. When enabled, the device begins switching only after the internal VOUT setpoint rises above the existing output voltage level - preventing reverse current flow into the output capacitor. This behavior is inherent to its current-mode control architecture and requires no external components. Pre-bias operation is confirmed in the TPS62480RNCT datasheet Section 7.3.2 and applies across all operating modes including PWM and PSM.
How does the VSEL pin function in TPS62480RNCT?
The VSEL pin on the TPS62480RNCT selects between two preset output voltages: VOUT1 (default, set by R1/R2 divider) and VOUT2 (higher voltage, enabled when VSEL = High). When VSEL is high, an internal switch connects external resistor RS between FB and RS pins, altering the feedback network to raise VOUT. The TPS62480RNCT datasheet specifies RS calculation in Equation 6 and confirms ±1% accuracy for both VOUT1 and VOUT2 in PWM mode - enabling dynamic voltage scaling without firmware or external DACs.
What thermal metrics apply to the TPS62480RNCT package?
The TPS62480RNCT in its RNC (VQFN-16) package has RθJA = 26.4°C/W (JEDEC with thermal vias) and RθJB = 10.2°C/W. These values assume standard 2-layer PCB with 1-in² copper pour and 4 thermal vias under the exposed pad. Junction-to-board resistance is the dominant thermal path - underscoring the necessity of robust PCB copper area and thermal via count. The 120°C Thermal Good (TG) threshold and 160°C thermal shutdown provide two-stage protection, both verified in production testing of the TPS62480RNCT.
Can TPS62480RNCT operate with only one inductor?
No, the TPS62480RNCT requires two separate 470-nH inductors - one for each phase (SW1/VIN1/PGND1 and SW2/VIN2/PGND2). Its dual-phase architecture relies on independent magnetic paths to achieve current balancing, phase shifting, and ripple cancellation. Using a single inductor would disable phase control, violate the current-loop architecture, and likely cause instability or overcurrent faults. The TPS62480RNCT datasheet Figure 6 and Table 1 explicitly specify "2x0.47-µH" with individual placement near each phase's power pins.
TPS62480RNCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x2.5)
TPS62480RNCT FAQ
1.How can I place an order for TPS62480RNCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62480RNCT 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 TPS62480RNCT reliable?
The price and inventory of TPS62480RNCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62480RNCT is usually 5 days.
3.What payment methods are accepted for TPS62480RNCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62480RNCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62480RNCT?
TPS62480RNCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62480RNCT 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 TPS62480RNCT?
For technical support, including TPS62480RNCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62480RNCT requirements.
6.How does Aetrix verify that TPS62480RNCT is sourced from the original manufacturer or authorized distributors?
All TPS62480RNCT 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 TPS62480RNCT meets industry standards.
7.What is the process for return or replacement of TPS62480RNCT?
All TPS62480RNCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62480RNCT, 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 TPS62480RNCT part is unused and in its original packaging.
Return procedure for TPS62480RNCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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