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Texas Instruments TPS54040ADRCR
- Part No.:
- TPS54040ADRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54040ADRCR.pdf
- Description:
- IC REG BUCK ADJ 500MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,911
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Product details
Overview
TPS54040ADRCR from Texas Instruments is a 42-V, 0.5-A synchronous step-down DC-DC converter with integrated 200-mΩ high-side MOSFET, Eco-Mode™ pulse-skipping operation, and adjustable 100 kHz–2.5 MHz switching frequency. It delivers regulated 0.8 V to VIN output in industrial power supplies, automotive accessories, and 12/24-V embedded systems.
For engineers reviewing the TPS54040ADRCR datasheet, TPS54040ADRCR pinout, TPS54040ADRCR application, or TPS54040ADRCR equivalent, key selection factors include its 116 μA no-load quiescent current, 2.5 V internal UVLO (adjustable via EN pin), 0.8 V reference accuracy (±2%), BOOT-PH UVLO protection, and PWRGD open-drain power-good signal with 94–107% output voltage window.
Technical Context
The TPS54040ADRCR employs peak current-mode control with slope compensation to ensure stability across duty cycles, and integrates a boot regulator requiring an external 0.1-μF ceramic capacitor between BOOT and PH pins. Its RT/CLK pin supports both resistor-set frequency tuning (100–2500 kHz) and external clock synchronization via PLL.
It features dual-stage enable logic: internal 2.5 V UVLO with tighter 1.11–1.36 V EN threshold and hysteresis current (1.91–3.99 μA), enabling precise input voltage supervision. The SS/TR pin provides programmable slow-start and tracking, while the PWRGD comparator monitors VSENSE for under- and over-voltage faults with dedicated OV masking logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 42 V - supports wide-input industrial and automotive rails without pre-regulation. |
| Output Current | 0.5 A continuous - sufficient for low-power microcontrollers, sensors, and interface ICs. |
| Quiescent Current | 116 μA (no load, Eco-Mode™ active) - enables battery-backed or energy-harvesting applications. |
| Switching Frequency | 100 kHz to 2.5 MHz - allows optimization of inductor size vs. efficiency; set by RT resistor or external clock. |
| Reference Voltage | 0.8 V ±2% - sets minimum output voltage; used with external resistor divider for adjustable regulation. |
| High-Side RDS(on) | 200 mΩ at VIN = 12 V - reduces conduction loss and improves full-load efficiency. |
| Power-Good Window | 94% to 107% of nominal VOUT - provides reliable system sequencing and fault detection. |
Pinout & Package
VSON-10 (DRC) package: 3.00 mm × 3.00 mm body with exposed thermal pad (Pin 11), optimized for thermal performance (θJB = 8 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BOOT | Bootstrap supply node | Connects to 0.1-μF ceramic capacitor between BOOT and PH; powers high-side gate drive; monitored for UVLO (2.1 V threshold). |
| 2 VIN | Main input supply | Accepts 3.5–42 V; supplies internal bias and high-side switch; requires ≥3 μF effective input capacitance. |
| 3 EN | Enable / UVLO control | Pull below 1.2 V to disable; floating enables operation; two-resistor divider adjusts UVLO threshold and hysteresis. |
| 4 SS/TR | Slow-start / tracking input | Capacitor sets output ramp time; overrides internal reference for sequencing; discharged during faults for repeatable restart. |
| 5 RT/CLK | Frequency control / sync input | Resistor-to-ground sets fSW; pulled above 2.2 V enters PLL sync mode; supports external clock edges (≥300 kHz). |
| 6 PWRGD | Open-drain power-good output | Asserts low when VSENSE < 92% or > 109% of nominal; deasserts (high-Z) within 94–107% window; requires external pull-up. |
| 7 VSENSE | Error amplifier inverting input | Monitors feedback voltage from output divider; compared to 0.8 V ref or SS/TR voltage; input current ≤10 μA. |
| 8 COMP | Error amplifier output | Drives PWM comparator; connects to RC compensation network; transconductance = 97 μA/V (normal), 26 μA/V (slow-start). |
| 9 GND | Signal and power ground | Common return for control circuitry; must be connected to exposed thermal pad for thermal and electrical integrity. |
| 10 PH | Switch node | Source of internal high-side MOSFET; connects to inductor and bootstrap diode path; critical for EMI layout. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-Mode™ Pulse Skipping | Reduces no-load input current to 116 μA while maintaining regulation-critical for always-on systems. |
| Adjustable UVLO with Hysteresis | EN pin enables user-defined start/stop voltages (e.g., 12 V ±0.5 V) using two resistors-improves system robustness. |
| Integrated Boot Recharge Diode | Eliminates external diode; simplifies layout and reduces BOM count while supporting 100% duty cycle operation. |
| Overvoltage Fault Protection | PWRGD OV comparator disables high-side switch until VOUT falls below 107%-prevents downstream damage during transients. |
| Frequency Foldback | Reduces fSW during startup and overload-limits peak inductor current and improves fault recovery margin. |
Applications
| Industrial Power Supply | Aftermarket Automotive Accessory |
|---|---|
Use Scenario: 24-V truck-mounted GPS tracker with battery backup and low-power sleep mode. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3.3 V to MCU and RF module; manages brown-out recovery via EN-based UVLO. Use Value: 116 μA quiescent current extends battery life; Eco-Mode™ eliminates audible switching noise during sleep. |
Use Scenario: 12-V dashcam with thermal shutdown protection and power sequencing for image sensor and memory. IC Role / Device Role / Timing Role: Main 5.0-V supply; SS/TR pin coordinates startup with sensor ASIC; PWRGD signals host processor when rail is stable. Use Value: Adjustable slow-start prevents inrush into large output capacitors; 150°C thermal shutdown protects against engine bay overheating. |
| Programmable Logic Controller (PLC) I/O Module | Industrial Sensor Node |
Use Scenario: DIN-rail mounted PLC with isolated 5-V auxiliary rail powering analog front-end and communication ICs. IC Role / Device Role / Timing Role: Non-isolated buck stage feeding isolated DC-DC; RT/CLK synchronized to system clock for EMI reduction. Use Value: 2.5-MHz max switching frequency enables compact 2.2-μH inductor; VSON-10 package fits tight board space. |
Use Scenario: Wireless temperature sensor node powered by LiSOCl₂ battery with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Ultra-low-IQ step-down regulator generating 1.8 V for ultra-low-power MCU and BLE radio. Use Value: 1.3 μA shutdown current minimizes battery drain; 0.8-V reference enables precise low-voltage regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 42 V, 0.6 A, 100 kHz–2.2 MHz; higher current rating but 200 μA IQ; AEC-Q100 qualified. | Automotive-grade replacement where qualification and extended temperature range (–40°C to 125°C) are mandatory. | Choose LM5164QPWPRQ1 only if AEC-Q100 compliance and 0.6 A output are required; not drop-in due to different pinout and compensation scheme. |
| MP2451DT-LF-Z | 36 V, 0.6 A, fixed 2.2 MHz; no Eco-Mode™, 250 μA IQ; no PWRGD or SS/TR pins. | Cost-sensitive consumer electronics where fixed frequency and minimal external components outweigh light-load efficiency needs. | Choose MP2451DT-LF-Z for simple, high-frequency designs without sequencing or power-good requirements; lacks UVLO adjustability and thermal shutdown flag. |
Compared with TPS54040ADRCR, LM5164QPWPRQ1 offers automotive qualification and higher current but sacrifices light-load efficiency and adds complexity; MP2451DT-LF-Z trades flexibility and precision for integration and cost-neither is pin-compatible, and both require PCB redesign and loop compensation revalidation.
Availability
TPS54040ADRCR is available at Aetrix Electronics and suitable for industrial power supplies, automotive accessory modules, and low-power sensor nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54040ADRCR 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 decades of expertise in high-reliability DC-DC conversion.
The TPS54040A product line delivers rugged, feature-rich buck converters for harsh environments-designed specifically for 12/24/36-V industrial and automotive systems demanding wide input range, low IQ, and robust fault protection.
FAQ
What is the minimum input voltage required for TPS54040ADRCR to start switching?
The TPS54040ADRCR has an internal undervoltage lockout (UVLO) threshold of 2.5 V, below which the device remains disabled. When enabled via the EN pin, startup occurs once VIN exceeds the adjusted UVLO threshold-typically set higher than 2.5 V using external resistors. For TPS54040ADRCR, the EN pin's tighter 1.11–1.36 V threshold ensures accurate activation even with noisy input rails.
Does TPS54040ADRCR support synchronization to an external clock?
Yes, TPS54040ADRCR supports external clock synchronization via the RT/CLK pin. When pulled above 2.2 V, the internal amplifier disables and the pin becomes a high-impedance clock input to the internal PLL. It accepts clock edges from 300 kHz to 2.2 MHz and locks within 100 μs-enabling deterministic EMI reduction in multi-rail systems.
How does the BOOT-PH UVLO function protect TPS54040ADRCR during high-duty-cycle operation?
The TPS54040ADRCR monitors BOOT-to-PH voltage and disables the high-side MOSFET if it falls below 2.1 V. This prevents gate underdrive and ensures reliable refresh of the bootstrap capacitor via the low-side path. During dropout, this mechanism enables safe 100% duty cycle operation while avoiding latch-up-critical for TPS54040ADRCR in 24-V to 3.3-V conversion with tight input margins.
Can TPS54040ADRCR be used to generate an output voltage lower than 0.8 V?
No-TPS54040ADRCR's internal voltage reference is fixed at 0.8 V ±2%, and the error amplifier compares VSENSE only to this reference or the SS/TR voltage (whichever is lower). Output voltages below 0.8 V are not supported; the minimum regulated output is 0.8 V, set by connecting VSENSE directly to the output or using a resistor divider that scales the output to 0.8 V.
What thermal considerations apply to TPS54040ADRCR in the VSON-10 (DRC) package?
The VSON-10 (DRC) package of TPS54040ADRCR has θJB = 8 °C/W and requires solid connection of the exposed thermal pad to a PCB copper plane for effective heat dissipation. At 0.5 A and 12 VIN/3.3 VOUT, junction temperature rise is ~25°C above ambient with 2 cm² of 2-oz copper-ensuring reliable operation within the –40°C to 150°C range without forced air.
TPS54040ADRCR 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:
- 500mA
- 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)
TPS54040ADRCR FAQ
1.How can I place an order for TPS54040ADRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54040ADRCR 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 TPS54040ADRCR reliable?
The price and inventory of TPS54040ADRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54040ADRCR is usually 5 days.
3.What payment methods are accepted for TPS54040ADRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54040ADRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54040ADRCR?
TPS54040ADRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54040ADRCR 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 TPS54040ADRCR?
For technical support, including TPS54040ADRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54040ADRCR requirements.
6.How does Aetrix verify that TPS54040ADRCR is sourced from the original manufacturer or authorized distributors?
All TPS54040ADRCR 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 TPS54040ADRCR meets industry standards.
7.What is the process for return or replacement of TPS54040ADRCR?
All TPS54040ADRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54040ADRCR, 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 TPS54040ADRCR part is unused and in its original packaging.
Return procedure for TPS54040ADRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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