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Texas Instruments TPS54140ADGQR
- Part No.:
- TPS54140ADGQR
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS54140ADGQR.pdf
- Description:
- IC REG BUCK ADJ 1.5A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,266
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Product details
Overview
TPS54140ADGQR 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, adjustable 100-kHz to 2.5-MHz switching frequency via RT/CLK pin, and open-drain PWRGD output monitoring VSENSE within 94%–107% of nominal voltage - used in industrial 24-V power rails and automotive aftermarket GPS/video systems.
For engineers reviewing the TPS54140ADGQR datasheet, TPS54140ADGQR pinout, TPS54140ADGQR application, or TPS54140ADGQR equivalent, key selection considerations include input UVLO adjustability via EN pin, BOOT-PH UVLO protection at 2.1 V, 0.8-V internal reference accuracy (±1.6%), thermal shutdown at 182°C, and MSOP-10 package with PowerPAD™ for enhanced thermal performance.
Technical Context
The TPS54140ADGQR implements constant-frequency peak-current-mode control with slope compensation to prevent subharmonic oscillation across full duty cycle range. Its error amplifier features 97-μS transconductance (gM) and 2.7-MHz bandwidth, driving COMP pin to regulate switch conduction based on sensed inductor current and VSENSE feedback.
It integrates boot capacitor recharge logic, enabling 100% duty-cycle operation until BOOT-PH drops below 2.1 V; then the high-side MOSFET disables and the internal low-side diode conducts to refresh BOOT. The RT/CLK pin supports both resistor-set frequency tuning and PLL-based synchronization to external clock edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 42 V - supports wide industrial and automotive battery-supplied inputs including cold-crank and load-dump conditions. |
| Output Current | 1.5 A continuous - delivers regulated power to microcontrollers, sensors, and interface ICs without external current boosting. |
| Quiescent Current | 116 μA in Eco-mode™ - enables always-on subsystems (e.g., CAN wake-up circuits) with minimal standby power draw. |
| Switching Frequency | 100 kHz to 2.5 MHz - allows optimization of inductor size (e.g., 2.2 μH at 1 MHz) and EMI filtering while maintaining light-load efficiency. |
| Reference Voltage | 0.8 V ±1.6% (0.784–0.816 V) - sets precise output regulation threshold; used with external resistor divider for adjustable VOUT down to 0.8 V. |
| Power Good Threshold | 94%–107% of VREF - provides reliable system reset signaling with built-in hysteresis; PWRGD asserts low outside this window. |
| Thermal Shutdown | 182°C junction temperature - protects against sustained overload or poor PCB thermal design; auto-recovery after cooldown. |
Pinout & Package
TPS54140ADGQR is packaged in a 10-pin MSOP (DGQ) with exposed thermal pad (PowerPAD™), measuring 3.00 mm × 3.00 mm. The thermal pad must be soldered to a dedicated PCB copper pour for effective heat dissipation (RθJB = 33°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects to 0.1-μF ceramic capacitor between BOOT and PH; supplies gate drive voltage for high-side MOSFET. |
| VIN | Main input supply | Accepts 3.5–42 V; powers internal circuitry and high-side driver; requires local 10-μF ceramic input capacitor. |
| EN | Enable / UVLO control | Pulled up internally; float to enable; pull below 1.25 V to disable; external resistors set custom UVLO threshold. |
| PH | Power switch source | Drives external inductor; connects to BOOT capacitor; high-side MOSFET source node. |
| GND | Power and signal ground | Common return for VIN, PH, VSENSE, COMP, PWRGD; must connect to thermal pad for thermal integrity. |
| COMP | Error amplifier output | Drives current-mode comparator; connect Type-II/III compensation network between COMP and VSENSE/GND. |
| VSENSE | Feedback input | Inverting input of transconductance error amp; monitors output via resistor divider; sets regulation point. |
| PWRGD | Open-drain status output | Asserts low when VSENSE <94% or >107% of VREF; requires external pull-up resistor (e.g., 10 kΩ to VIN). |
| SS/TR | Slow-start / tracking | Capacitor sets soft-start time; voltage override enables sequencing with other regulators or reference voltages. |
| RT/CLK | Frequency control / sync | Resistor-to-GND sets fSW; pulled above 2.2 V to enter PLL sync mode with external clock falling edge. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode™ Pulse Skipping | Reduces no-load IQ to 116 μA by disabling switching cycles while maintaining regulation via output capacitor hold-up. |
| Adjustable UVLO with Hysteresis | EN pin allows user-defined start/stop thresholds (e.g., 7.7 V start, 6.7 V stop) using two resistors - improves system brown-out resilience. |
| Integrated Boot Recharge Diode | Eliminates need for external bootstrap diode; reduces BOM count and layout area while supporting 100% duty cycle operation. |
| Overvoltage Protection Logic | OV comparator disables high-side MOSFET when VSENSE exceeds 107% VREF, preventing output overshoot during line/load transients. |
| Frequency Foldback | Reduces fSW during startup and overcurrent faults to limit peak inductor current and improve fault recovery margin. |
Applications
| Industrial 24-V Power Rail | Automotive Aftermarket Video System |
|---|---|
Use Scenario: Regulating unregulated 24-V truck/bus battery supply to 3.3 V for CAN controller and display MCU. IC Role / Device Role / Timing Role: Primary buck regulator providing stable, low-noise 3.3-V rail with PWRGD signaling for safe MCU boot sequence. Use Value: 116-μA quiescent current extends battery life during vehicle off-state; 42-V max input withstands load-dump surges up to 47 V. | Use Scenario: Powering LCD video module and GPS receiver in dash-mounted infotainment unit powered from 12-V car battery. IC Role / Device Role / Timing Role: Step-down converter delivering 5-V rail with adjustable slow-start to avoid inrush current tripping fuse during ignition-on. Use Value: SS/TR pin enables controlled ramp-up synchronized with main system processor; Eco-mode maintains efficiency at standby video buffer loads. |
| Programmable Logic Controller (PLC) I/O Module | Industrial Sensor Node |
Use Scenario: Generating isolated 5-V and 3.3-V rails from 24-V field bus in modular PLC backplane with strict thermal limits. IC Role / Device Role / Timing Role: High-efficiency buck stage feeding downstream LDOs; thermal pad soldered to internal copper layer for 33°C/W board-level RθJB. Use Value: 200-mΩ high-side MOSFET and 45.1°C/W RθJA (VSON) enable 1.5-A operation in compact 3×3-mm footprint without forced air. | Use Scenario: Powering ultra-low-power wireless sensor (e.g., LoRaWAN node) from long-life Li-SOCl₂ battery with 3.6-V nominal output. IC Role / Device Role / Timing Role: Wide-input buck converter stepping down 3.6–42 V to fixed 3.3 V; operates in Eco-mode during 99% sleep duty cycle. Use Value: 1.3-μA shutdown current minimizes battery drain during deep-sleep; 0.8-V reference ensures accurate output even at end-of-life battery voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 42-V, 1-A, 1.5-MHz fixed-frequency buck; no Eco-mode; higher 260-μA IQ; AEC-Q100 qualified. | Targeted at automotive safety-critical systems requiring qualification; lacks PWRGD and adjustable UVLO. | Choose for automotive production where AEC-Q100 compliance is mandatory and 1-A output suffices. |
| TPS54240DGQR | 42-V, 2.5-A, same pinout/package; 145-μA Eco-mode IQ; tighter 0.8-V ref (±1%); higher current capability. | Direct upgrade path for higher load demands; identical layout compatibility but requires revalidation of inductor/thermal design. | Choose when system load exceeds 1.5 A and board space/layout reuse is critical. |
Compared with LM5164QPWPRQ1, TPS54140ADGQR offers lower quiescent current and integrated PWRGD for simpler system monitoring; compared with TPS54240DGQR, it trades 1-A lower output current for reduced cost and thermal footprint in 1.5-A applications.
Availability
TPS54140ADGQR is available at Aetrix Electronics and suitable for industrial automation, automotive aftermarket electronics, and battery-powered sensor nodes requiring stable component supply, long-lifecycle support, and consistent parametric performance across temperature.
Supply support for TPS54140ADGQR 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and communications markets.
The TPS54140A product line delivers high-voltage, current-mode buck converters optimized for rugged 12-V/24-V systems where input transients, thermal constraints, and low-light-load efficiency are critical design factors.
FAQ
What is the minimum input voltage required for TPS54140ADGQR to start switching?
The TPS54140ADGQR has an internally set undervoltage lockout (UVLO) threshold of 2.5 V, but its actual start input voltage depends on EN pin configuration. With EN floating, startup occurs at approximately 7.7 V (rising VIN). When EN is tied directly to VIN, the device starts at 2.5 V. This dual-threshold behavior allows flexible system-level brown-out management. The TPS54140ADGQR uses internal hysteresis to prevent chatter near the threshold.
Can TPS54140ADGQR synchronize to an external clock, and how is it configured?
Yes, TPS54140ADGQR supports external clock synchronization via the RT/CLK pin. When RT/CLK voltage exceeds 2.2 V (PLL upper threshold), the internal resistor-set amplifier disables and the pin becomes a high-impedance clock input. A clean external clock signal applied here synchronizes the internal power switch turn-on to each falling edge. The TPS54140ADGQR automatically reverts to resistor-set mode if clock edges stop, ensuring robust fallback behavior without firmware intervention.
How does the BOOT-PH UVLO function protect TPS54140ADGQR during high-duty-cycle operation?
The TPS54140ADGQR monitors BOOT-to-PH voltage and disables the high-side MOSFET if it falls below 2.1 V. This prevents gate underdrive and potential shoot-through during extended on-times. When disabled, the internal low-side diode conducts, allowing the BOOT capacitor to recharge through the PH node. The TPS54140ADGQR resumes normal operation once BOOT-PH recovers above threshold - a hardware-level protection that enables true 100% duty cycle capability without external components.
What is the purpose of the SS/TR pin on TPS54140ADGQR, and how is it used for power sequencing?
SS/TR serves dual roles: slow-start capacitor connection for controlled VOUT ramp-up, and tracking input for voltage alignment with another regulator. For sequencing, connect SS/TR to the VOUT of a master regulator via a resistor divider; the TPS54140ADGQR's error amplifier then forces its output to follow the master rail. During faults, SS/TR discharges fully, ensuring repeatable restart behavior. The TPS54140ADGQR also includes overload recovery logic that re-ramps from fault voltage to nominal setpoint after fault removal.
Does TPS54140ADGQR require an external bootstrap diode, and why or why not?
No, TPS54140ADGQR does not require an external bootstrap diode because it integrates a dedicated boot recharge diode. This internal diode allows the BOOT capacitor to recharge during the high-side MOSFET off-time via the PH node, eliminating a discrete component and associated layout complexity. The TPS54140ADGQR's boot architecture supports reliable operation with only a 0.1-μF X7R/X5R ceramic capacitor between BOOT and PH - reducing BOM cost and improving manufacturability without sacrificing performance.
TPS54140ADGQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Eco-Mode™
- Package/Case:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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-HVSSOP
TPS54140ADGQR FAQ
1.How can I place an order for TPS54140ADGQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54140ADGQR 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 TPS54140ADGQR reliable?
The price and inventory of TPS54140ADGQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54140ADGQR is usually 5 days.
3.What payment methods are accepted for TPS54140ADGQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54140ADGQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54140ADGQR?
TPS54140ADGQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54140ADGQR 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 TPS54140ADGQR?
For technical support, including TPS54140ADGQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54140ADGQR requirements.
6.How does Aetrix verify that TPS54140ADGQR is sourced from the original manufacturer or authorized distributors?
All TPS54140ADGQR 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 TPS54140ADGQR meets industry standards.
7.What is the process for return or replacement of TPS54140ADGQR?
All TPS54140ADGQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54140ADGQR, 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 TPS54140ADGQR part is unused and in its original packaging.
Return procedure for TPS54140ADGQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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