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Texas Instruments TPS54140ADRCT
- Part No.:
- TPS54140ADRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54140ADRCT.pdf
- Description:
- IC REG BUCK ADJ 1.5A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,814
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Product details
Overview
TPS54140ADRCT from Texas Instruments is a 42-V, 1.5-A synchronous step-down DC/DC converter with integrated 200-mΩ high-side MOSFET, Eco-mode™ pulse-skipping for 116-μA no-load quiescent current, and adjustable 100-kHz to 2.5-MHz switching frequency via RT/CLK pin - used in industrial 12-V/24-V power rails requiring tight UVLO control and power-good monitoring.
For engineers reviewing the TPS54140ADRCT datasheet, TPS54140ADRCT pinout, TPS54140ADRCT application, or TPS54140ADRCT equivalent, key selection considerations include its 2.5-V fixed UVLO threshold (tighter than TPS54140), 0.8-V internal reference, open-drain PWRGD with 94–107% output window, and VSON-10 package with PowerPAD™ thermal enhancement.
Technical Context
The TPS54140ADRCT implements constant-frequency peak-current-mode control with slope compensation to prevent subharmonic oscillation across full duty cycle range. Its error amplifier drives COMP pin with 97-μS transconductance (26 μS during slow start) and 2.7-MHz bandwidth, enabling stable loop response with minimal external compensation.
It integrates boot UVLO protection (2.1-V BOOT–PH threshold), frequency foldback during overload, and an internal PLL on RT/CLK that synchronizes switching to external clocks or reverts to resistor-set mode when clocking stops - supporting precise timing coordination in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 42 V - supports wide industrial input rails including 12-V, 24-V, and 36-V battery/supply systems. |
| Output Current | 1.5 A continuous - delivers regulated power to microcontrollers, sensors, and interface ICs without external current boosting. |
| Quiescent Current | 116 μA at no load - enables long-term operation in always-on industrial monitoring nodes. |
| Switching Frequency | 100 kHz to 2.5 MHz - allows optimization of inductor size and efficiency; set by RT resistor or synchronized to external clock. |
| Reference Voltage | 0.8 V ±1.6% (TJ = –40°C to +150°C) - sets minimum output voltage and defines feedback divider ratio accuracy. |
| Power-Good Window | 94% to 107% of VOUT - provides reliable system reset signaling with hysteresis against noise-induced false triggers. |
| Enable Threshold | 1.25 V typical (±140 mV) - tighter tolerance than TPS54140, improving UVLO accuracy for critical supply sequencing. |
| Thermal Resistance | RθJB = 20.5°C/W (VSON-10) - enables high-power density layout with PCB copper as primary heat path via exposed thermal pad. |
Pinout & Package
VSON-10 (DRC) package with 3.00 mm × 3.00 mm body and exposed thermal pad (Pin 11) - requires solder connection to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT (1) | Bootstrap supply node | Connects to 0.1-μF X7R/X5R ceramic capacitor between BOOT and PH; supplies gate drive for high-side MOSFET. |
| VIN (2) | Main input supply | Accepts 3.5–42 V; powers internal circuitry and high-side driver; bypassed with ≥10-μF ceramic capacitor. |
| EN (3) | Enable control input | Pulled up internally; float to enable; pull below 1.2 V to disable; used with resistor divider to adjust UVLO threshold. |
| SS/TR (4) | Slow-start/tracking control | Capacitor sets output ramp time; external voltage source enables power sequencing with other rails. |
| RT/CLK (5) | Frequency setting/sync input | Resistor-to-ground sets fSW (100 kHz–2.5 MHz); pulled above 2.2 V to accept external clock edges for synchronization. |
| PWRGD (6) | Open-drain power-good output | Asserts low if VSENSE < 94% or > 107% of reference; requires external pull-up for logic-level signaling. |
| VSENSE (7) | Feedback input | Inverting input of error amplifier; connects to resistor divider from VOUT to set output voltage per VREF = 0.8 V. |
| COMP (8) | Error amplifier output | Connects to Type II/III compensation network; drives current-mode PWM comparator with 97-μS gm. |
| GND (9) | Analog/digital ground | Common return for control circuitry; must be tied to thermal pad for optimal thermal and noise performance. |
| PH (10) | Switch node | Drain of internal high-side MOSFET and source of external low-side diode or synchronous rectifier. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode™ pulse skipping | Reduces no-load IQ to 116 μA while maintaining regulation - extends battery life in standby industrial sensors. |
| Integrated boot recharge diode | Eliminates external diode; reduces BOM count and layout area while enabling robust 100% duty-cycle operation. |
| Adjustable UVLO with hysteresis | EN pin supports resistor-based UVLO threshold tuning (e.g., 7.7 V start / 6.7 V stop) for custom input rail sequencing. |
| OV/UV power-good detection | PWRGD asserts on overvoltage (>109%) or undervoltage (<92%), and masks high-side switch until recovery - prevents downstream damage. |
| Overload recovery circuit | Automatically discharges SS/TR capacitor during fault and restarts from fault voltage - ensures repeatable soft-start after thermal shutdown. |
| Frequency foldback | Reduces fSW during startup and overcurrent events to limit inductor current slew rate and improve fault tolerance. |
Applications
| Industrial 12-V Power Rail | Aftermarket Automotive GPS |
|---|---|
Use Scenario: Regulating unregulated 12-V vehicle battery supply to 3.3-V for GPS module MCU and RF front-end. IC Role / Device Role / Timing Role: Primary buck regulator providing clean, sequenced 3.3-V rail with PWRGD confirmation before MCU boot. Use Value: 116-μA quiescent current minimizes parasitic drain; Eco-mode maintains >85% efficiency at 10-mA GPS standby load. |
Use Scenario: Converting noisy 24-V truck battery to 5-V for display backlight and USB host controller. IC Role / Device Role / Timing Role: High-input-voltage buck converter with adjustable UVLO to tolerate cold-crank dips down to 6.7 V. Use Value: 42-V absolute max rating and 200-mΩ MOSFET sustain 1.5-A load under transient surges; RT/CLK sync avoids EMI peaks. |
| Programmable Logic Controller (PLC) I/O Module | Industrial IoT Sensor Node |
Use Scenario: Generating isolated 3.3-V logic supply from 24-V field bus in DIN-rail mounted PLC backplane. IC Role / Device Role / Timing Role: Non-isolated pre-regulator feeding isolated DC/DC; SS/TR pin tracks upstream 5-V rail for controlled power-up sequence. Use Value: Adjustable slow-start prevents inrush into downstream capacitors; thermal pad enables conduction cooling in sealed enclosures. |
Use Scenario: Powering ultra-low-power wireless sensor (LoRaWAN/NB-IoT) with intermittent 100-ms transmit bursts. IC Role / Device Role / Timing Role: Always-on buck converter supplying MCU and radio; PWRGD signals valid VOUT before wake-up transmission. Use Value: 1.3-μA shutdown current extends 10-year battery life; pulse skip mode eliminates switching noise during ADC sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54140DRCT | Same pinout and electrical specs, but uses looser 1.25-V ±200-mV EN threshold vs. TPS54140ADRCT's ±140-mV tolerance. | Less precise UVLO sequencing in multi-rail systems where tight enable matching is required. | Select TPS54140ADRCT when accurate input voltage monitoring or consistent startup behavior across temperature is critical. |
| LM5164QDDARQ1 | Automotive-grade 65-V, 0.6-A buck with integrated FET, 17-μA IQ, and spread-spectrum clocking - no PWRGD or SS/TR pins. | Lacks power-good signaling and tracking capability; suited for cost-sensitive automotive modules without sequencing needs. | Choose LM5164QDDARQ1 only for AEC-Q100-compliant designs where lower current and higher VIN range outweigh missing features. |
Compared with TPS54140DRCT, the TPS54140ADRCT offers tighter EN threshold control for robust sequencing; versus LM5164QDDARQ1, it provides PWRGD, SS/TR, and higher output current - making it superior for industrial programmable power rails requiring reliability and feature completeness.
Availability
TPS54140ADRCT is available at Aetrix Electronics and suitable for industrial automation, automotive aftermarket electronics, and IoT sensor node designs requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for TPS54140ADRCT 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and design-in support.
The TPS54140A family is designed for high-input-voltage industrial and automotive DC/DC conversion - prioritizing wide VIN range, low IQ, and robust fault handling in harsh environments.
FAQ
What is the maximum input voltage rating for the TPS54140ADRCT?
The TPS54140ADRCT has an absolute maximum input voltage rating of 47 V on the VIN pin, with recommended operating range from 3.5 V to 42 V. Exceeding 42 V continuously may trigger overvoltage protection or reduce lifetime reliability, though short transients up to 47 V are tolerated per absolute maximum ratings.
Does the TPS54140ADRCT support external clock synchronization?
Yes, the TPS54140ADRCT supports external clock synchronization via the RT/CLK pin. When pulled above 2.2 V, the internal oscillator disables and the pin becomes a high-impedance clock input synchronized to falling edges; clocking resumes automatically if signal stops.
How does the Eco-mode™ function in the TPS54140ADRCT affect light-load efficiency?
Eco-mode™ in the TPS54140ADRCT enables pulse-skipping operation below ~100 mA load, reducing switching losses and lowering no-load quiescent current to 116 μA. This increases light-load efficiency by up to 25 percentage points compared to forced-PWM mode at 10-mA output.
What is the purpose of the SS/TR pin on the TPS54140ADRCT?
The SS/TR pin on the TPS54140ADRCT controls output voltage ramp time during startup (slow-start) or matches output rise/fall to another supply (tracking). An external capacitor sets soft-start duration; a resistor divider enables precise sequencing relative to other rails in multi-supply systems.
Can the TPS54140ADRCT operate at 100% duty cycle?
Yes, the TPS54140ADRCT can operate at 100% duty cycle as long as the BOOT–PH voltage remains above 2.1 V. Its boot UVLO circuit turns off the high-side MOSFET only when BOOT–PH drops below this threshold, allowing extended dropout operation before refresh cycles begin.
TPS54140ADRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Eco-Mode™
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 39V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 100kHz ~ 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS54140ADRCT FAQ
1.How can I place an order for TPS54140ADRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54140ADRCT 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 TPS54140ADRCT reliable?
The price and inventory of TPS54140ADRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54140ADRCT is usually 5 days.
3.What payment methods are accepted for TPS54140ADRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54140ADRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54140ADRCT?
TPS54140ADRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54140ADRCT 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 TPS54140ADRCT?
For technical support, including TPS54140ADRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54140ADRCT requirements.
6.How does Aetrix verify that TPS54140ADRCT is sourced from the original manufacturer or authorized distributors?
All TPS54140ADRCT 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 TPS54140ADRCT meets industry standards.
7.What is the process for return or replacement of TPS54140ADRCT?
All TPS54140ADRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54140ADRCT, 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 TPS54140ADRCT part is unused and in its original packaging.
Return procedure for TPS54140ADRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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