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Texas Instruments TPS54377RHFT
- Part No.:
- TPS54377RHFT
- Manufacturer:
- Texas Instruments
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TPS54377RHFT.pdf
- Description:
- IC REG BUCK ADJ 3A 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,388
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Product details
Overview
TPS54377RHFT from Texas Instruments is a synchronous buck converter IC designed for high-efficiency, continuous-output-current DC/DC conversion in low-input-voltage systems. It integrates high- and low-side MOSFETs, delivers up to 3 A output current, supports adjustable output voltage down to 0.8 V, operates from 2.95 V to 6 V input, and features internal 500-kHz switching frequency with external synchronization capability.
For engineers reviewing the TPS54377RHFT datasheet, TPS54377RHFT pinout, TPS54377RHFT application, or TPS54377RHFT equivalent, key selection considerations include its integrated power stage, programmable soft-start via SS/EN pin, under-voltage lockout threshold at 2.7 V, thermal shutdown at 150 °C, and compatibility with ceramic output capacitors in compact QFN-16 (3 mm × 3 mm) layout.
Technical Context
The TPS54377RHFT implements a current-mode control architecture with an internal error amplifier, PWM comparator, and adaptive dead-time logic to optimize efficiency across load transients. Its integrated 36-mΩ/18-mΩ MOSFET pair enables high-side and low-side switching with minimal external component count.
It includes dedicated pins for synchronization (SYNC), output voltage feedback (FB), and power-good indication (PG), while supporting external frequency adjustment from 300 kHz to 2.2 MHz via resistor on RT/CLK pin and precise output regulation via resistive divider on FB pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.95 V to 6 V - Enables direct operation from single-cell Li-ion or 3.3-V/5-V rails without pre-regulation. |
| Output Current | Up to 3 A continuous - Sufficient for powering FPGAs, DSPs, and microcontrollers in space-constrained designs. |
| Switching Frequency | Internally fixed at 500 kHz, adjustable 300 kHz–2.2 MHz - Balances efficiency, size, and EMI in system-level layout. |
| Output Voltage Accuracy | ±1% over line/load/temperature - Ensures stable core voltage for sensitive digital loads without external trimming. |
| Junction Temperature Range | –40 °C to 150 °C - Supports industrial and automotive under-hood applications with thermal shutdown at 150 °C. |
| Package | 16-pin QFN (3 mm × 3 mm, 0.5-mm pitch) with exposed thermal pad - Provides low thermal resistance (θJA = 42.5 °C/W) for high-power density. |
| Enable Threshold | 1.215 V typical on EN pin - Allows precise sequencing control using external resistor divider or logic-level signals. |
Pinout & Package
TPS54377RHFT uses a thermally enhanced 16-pin QFN package (RHF suffix) with 0.5-mm pitch and exposed thermal pad (PowerPAD™) for efficient heat dissipation. The package measures 3 mm × 3 mm and requires solder reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input power supply | Accepts 2.95–6 V; connects to input capacitor bank and must be decoupled near package edge. |
| VOUT | Power switch node | Drives external output inductor; high di/dt path requiring short, wide PCB trace to minimize ringing. |
| PH | Phase output | Internal high-side/low-side MOSFET connection point; ties directly to inductor and output capacitor. |
| FB | Feedback input | Resistive divider sets output voltage; high-impedance node sensitive to noise-requires guard ring and short trace. |
| EN | Enable control | Active-high logic input; 1.215 V threshold enables soft-start and system sequencing. |
| SS/EN | Soft-start & enable | Combines enable function with external capacitor-controlled ramp time (e.g., 0.001 µF = ~1 ms start-up). |
| PG | Power-good indicator | Open-drain output asserts high when output is within ±10% of regulation; used for downstream power sequencing. |
| RT/CLK | Frequency setting | Resistor-to-ground sets switching frequency (300 kHz–2.2 MHz); also accepts external clock signal. |
| SYNC | External sync input | Accepts TTL/CMOS clock for phase alignment with other converters in multi-rail systems. |
| GND | Power ground | Primary return path for high-current switches; must connect to thermal pad and solid ground plane. |
| AGND | Analog ground | Reference for FB, EN, and PG; isolated from power ground to prevent noise coupling into regulation loop. |
| BOOT | High-side gate drive | Connects to bootstrap capacitor (typically 0.01 µF ceramic) between BOOT and PH for high-side MOSFET gate charging. |
| NC | No connect | Two pins (pins 12 and 15) are internally unused; must remain unconnected and unstubbed. |
| Thermal Pad | Thermal & electrical ground | Must be soldered to large copper area (≥100 mm²) for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 36-mΩ/18-mΩ MOSFETs | Eliminates need for external power switches, reducing BOM count and PCB area by >30% vs discrete solutions. |
| Adjustable soft-start via SS/EN pin | Prevents inrush current during power-up; external capacitor sets ramp time independent of input voltage. |
| Programmable switching frequency | Enables EMI optimization and avoids noise-sensitive bands (e.g., AM radio) through resistor or external clock. |
| Power-good (PG) open-drain output | Provides system-level fault signaling and enables safe power sequencing with downstream regulators or processors. |
| Thermal shutdown with hysteresis | Shuts down at 150 °C junction temperature and restarts at ~135 °C, preventing thermal runaway in sustained overload. |
| Under-voltage lockout (UVLO) | Disables operation below 2.7 V input, avoiding unstable regulation and MOSFET shoot-through during brownout conditions. |
Applications
| Point-of-Load Regulation | FPGA Core Supply |
|---|---|
Use Scenario: Regulating 1.2 V at 2.5 A for a mid-range FPGA core rail in a telecom baseband board. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated voltage with fast transient response to dynamic core current demands. Use Value: Achieves <92% peak efficiency at 1.2 V/2.5 A with 500-kHz switching, minimizing heat buildup in dense FPGA carrier modules. | Use Scenario: Powering ARM Cortex-A series processor cores in an industrial gateway with strict thermal limits. IC Role / Device Role / Timing Role: Main DC/DC converter supplying variable core voltage (0.8–1.35 V) under DVFS control via FB divider. Use Value: ±1% output accuracy ensures reliable CPU operation across temperature; soft-start prevents reset glitches during cold boot. |
| Low-Voltage Industrial Sensor Hub | Automotive Infotainment SoC Rail |
Use Scenario: Generating 3.3 V at 1.5 A for a multi-sensor data acquisition module powered from a 5-V bus. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with UVLO and thermal protection for unattended field deployment. Use Value: Operates reliably from 4.5–5.5 V input range; 150 °C thermal shutdown prevents failure in sealed enclosures. | Use Scenario: Supplying 1.1 V at 2.8 A to an infotainment SoC in a vehicle head unit with 12-V battery input via pre-regulator. IC Role / Device Role / Timing Role: Secondary-stage buck converter optimized for low-noise, low-ripple performance in EMC-sensitive cabin electronics. Use Value: Synchronization capability (SYNC pin) eliminates beat frequencies with other on-board converters, easing CISPR-25 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54360BQDDARQ1 | Wider input range (3.5–60 V), lower max output current (3.5 A), no SYNC pin, AEC-Q100 qualified | Designed for automotive front-end supplies; lacks frequency synchronization and soft-start adjustability | Choose for 12-V/24-V automotive systems requiring qualification, not for low-input, sync-critical designs. |
| MP2332HGTL-P | 4.5–18 V input, 3.5 A output, fixed 500-kHz frequency, no RT/CLK or SYNC, smaller 2-mm × 2-mm QFN | Targeted at cost-sensitive consumer applications; missing key features for precision sequencing and EMI control | Select only if input voltage exceeds 6 V and synchronization/soft-start flexibility is unnecessary. |
Compared with TPS54377RHFT, the TPS54360BQDDARQ1 supports harsher automotive input conditions but sacrifices design flexibility, while the MP2332HGTL-P offers footprint savings at the expense of critical control features-making TPS54377RHFT optimal for compact, low-voltage, multi-converter systems requiring precision timing and sequencing.
Availability
TPS54377RHFT is available at Aetrix Electronics and suitable for FPGA power delivery, industrial sensor hubs, and automotive infotainment SoC rails requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54377RHFT 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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The TPS54377RHFT belongs to TI's SWIFT™ family of high-performance DC/DC converters, engineered specifically for high-efficiency, low-voltage point-of-load applications in space-constrained industrial, computing, and automotive electronics.
FAQ
What is the recommended input capacitor configuration for the TPS54377RHFT?
The TPS54377RHFT requires a minimum 22-µF X5R/X7R ceramic input capacitor placed within 3 mm of the VIN and GND pins. A parallel combination of 10-µF + 10-µF + 2.2-µF capacitors is recommended to suppress high-frequency ripple and ensure stable operation across temperature. Avoid tantalum or aluminum electrolytics due to ESR and lifetime limitations.
How does the TPS54377RHFT handle thermal management in high-current applications?
The TPS54377RHFT uses a thermally enhanced QFN-16 package with exposed PowerPAD™. For 3-A operation, TI recommends a minimum 100 mm² copper pour connected to the thermal pad via ≥6 thermal vias (0.3-mm diameter). With this layout, junction-to-ambient θJA is 42.5 °C/W, enabling full-load operation at up to +85 °C ambient without derating.
Can the TPS54377RHFT synchronize to an external clock, and what are the voltage requirements?
Yes, the TPS54377RHFT supports external synchronization via its SYNC pin. It accepts TTL- or CMOS-level clocks from 300 kHz to 2.2 MHz, with logic-high threshold of 2.4 V (min) and logic-low threshold of 0.8 V (max). The clock duty cycle must be between 30% and 70%, and the SYNC signal must be free of jitter exceeding ±1 ns to maintain stable operation.
What is the purpose of the SS/EN pin on the TPS54377RHFT, and how is soft-start time calculated?
The SS/EN pin on the TPS54377RHFT serves dual functions: enabling the device (logic-high >1.215 V) and controlling soft-start duration. Soft-start time is set by an external capacitor: tSS ≈ 1.25 × CSS (µF) × 1000 ms. For example, a 0.001-µF capacitor yields ~1.25 ms ramp time. This prevents output overshoot and limits inrush current during startup.
Does the TPS54377RHFT provide overcurrent protection, and how does it respond to a short-circuit condition?
Yes, the TPS54377RHFT includes cycle-by-cycle overcurrent protection triggered when high-side MOSFET current exceeds ~4.5 A. During a short circuit, it enters hiccup mode: shuts down for ~35 ms, then attempts restart. If fault persists, it repeats the cycle. This protects both the IC and external components while limiting average power dissipation during sustained faults.
TPS54377RHFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.891V
- Voltage - Output (Max):
- 5.4V
- Current - Output:
- 3A
- Frequency - Switching:
- 350kHz, 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (5x4)
TPS54377RHFT FAQ
1.How can I place an order for TPS54377RHFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54377RHFT 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 TPS54377RHFT reliable?
The price and inventory of TPS54377RHFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54377RHFT is usually 5 days.
3.What payment methods are accepted for TPS54377RHFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54377RHFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54377RHFT?
TPS54377RHFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54377RHFT 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 TPS54377RHFT?
For technical support, including TPS54377RHFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54377RHFT requirements.
6.How does Aetrix verify that TPS54377RHFT is sourced from the original manufacturer or authorized distributors?
All TPS54377RHFT 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 TPS54377RHFT meets industry standards.
7.What is the process for return or replacement of TPS54377RHFT?
All TPS54377RHFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54377RHFT, 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 TPS54377RHFT part is unused and in its original packaging.
Return procedure for TPS54377RHFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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