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Texas Instruments TPS54040DGQR
- Part No.:
- TPS54040DGQR
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS54040DGQR.pdf
- Description:
- IC REG BUCK ADJ 500MA 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,589
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Product details
Overview
TPS54040DGQR from Texas Instruments is a 42-V input, 0.5-A synchronous step-down DC/DC converter with integrated 200-mΩ high-side MOSFET, Eco-Mode™ pulse-skipping operation, 116-μA quiescent current, and adjustable 100-kHz to 2.5-MHz switching frequency - used in industrial power rails requiring wide VIN range and light-load efficiency.
For engineers reviewing the TPS54040DGQR datasheet, TPS54040DGQR pinout, TPS54040DGQR application, or TPS54040DGQR equivalent, key selection criteria include its HVSSOP-10 PowerPAD™ package, BOOT-PH bootstrap architecture, PWRGD open-drain power-good output, and EN-pin programmable UVLO for 12-V/24-V system supervision.
Technical Context
The TPS54040DGQR implements constant-frequency peak current-mode control with internal slope compensation to prevent subharmonic oscillation across full duty cycle range. Its transconductance error amplifier (97 μA/V) compares VSENSE against either 0.8-V internal reference or SS/TR tracking voltage.
It integrates boot UVLO protection (2.1 V threshold), frequency foldback during overload, thermal shutdown at 182°C, and a PLL-synchronized RT/CLK interface supporting both resistor-set and external clock modes - enabling 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 12-V and 24-V industrial bus inputs with margin for transients. |
| Output Current | 0.5 A continuous - sufficient for powering microcontrollers, sensors, and analog front-ends in embedded systems. |
| Quiescent Current | 116 μA in Eco-Mode™ - enables >90% efficiency at 10-mA loads, critical for always-on subsystems. |
| Switching Frequency | 100 kHz to 2.5 MHz - adjustable via RT/CLK resistor or external clock for EMI optimization and size tradeoffs. |
| Reference Voltage | 0.8 V ±2% - sets minimum output voltage and defines feedback divider ratio accuracy. |
| Power-Good Threshold | 94–107% of VOUT - provides reliable system sequencing and fault detection without external comparators. |
| Shutdown Current | 1.3 μA - reduces standby power in battery-backed or energy-harvesting applications. |
Pinout & Package
HVSSOP-10 package with exposed PowerPAD™ thermal pad (3.00 mm × 3.00 mm); requires PCB thermal vias under pad for junction-to-board RθJB = 28°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Drives high-side MOSFET gate; requires 0.1-μF X7R/X5R ceramic capacitor to PH for gate drive integrity. |
| PH | High-side MOSFET source | Switching node connecting inductor; must be routed with low-inductance layout to minimize ringing. |
| VIN | Main input supply | Accepts 3.5–42 V; requires ≥3-μF effective input capacitance near device for stability. |
| GND | Analog/digital ground | Common reference for control circuitry; tied to PowerPAD™ for thermal and noise performance. |
| VSENSE | Feedback inverting input | Compares output voltage (via resistor divider) to 0.8-V reference; max 10-μA input bias. |
| COMP | Error amplifier output | Drives external RC compensation network; transconductance = 97 μA/V for loop stability tuning. |
| EN | Enable/UVLO control | Pull <1.2 V to disable; internal pull-up allows floating-enable; two-resistor divider adjusts UVLO threshold. |
| RT/CLK | Frequency programming | Resistor-to-ground sets fSW (100–2500 kHz); pulled above 2.2 V to enter PLL sync mode. |
| SS/TR | Slow-start/tracking | Capacitor sets soft-start time; voltage override enables power sequencing with other rails. |
| PWRGD | Open-drain power-good | Asserts low if VOUT <92% or >109% nominal; requires external pull-up for system reset signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-Mode™ Pulse Skipping | Reduces no-load supply current to 116 μA while maintaining regulation - extends battery life in intermittent-use systems. |
| Integrated 200-mΩ High-Side MOSFET | Eliminates external switch and driver, reducing BOM count and PCB area in space-constrained designs. |
| Adjustable UVLO with Hysteresis | EN pin supports resistor-programmable start/stop thresholds - prevents brownout oscillation in fluctuating 12-V automotive or industrial supplies. |
| Boot UVLO Protection | Monitors BOOT-PH voltage; disables high-side switch below 2.1 V to ensure gate drive integrity during dropout. |
| Overvoltage Fault Recovery | PWRGD OV comparator masks high-side switch until VOUT falls below 107%, preventing sustained overvoltage stress on downstream loads. |
Applications
| Industrial Sensor Node Power | Automotive Aftermarket GPS Module |
|---|---|
Use Scenario: Powering ultra-low-power MCU, MEMS sensor, and BLE radio from 24-V vehicle battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3.3 V at ≤100 mA; manages startup sequencing via SS/TR pin. Use Value: 116-μA quiescent current ensures >1-year battery backup life; 42-V rating withstands load-dump transients up to 40 V. | Use Scenario: Regulating 5.0 V for GPS receiver and display in dash-mounted video/navigation unit. IC Role / Device Role / Timing Role: Main DC/DC converter with PWRGD signal enabling safe processor reset during undervoltage events. Use Value: Adjustable UVLO (via EN resistors) avoids false resets during engine cranking; 700-kHz fSW minimizes EMI near RF-sensitive GPS frontend. |
| Programmable Logic Controller I/O Module | Factory Automation Fieldbus Node |
Use Scenario: Generating isolated 5-V and 3.3-V rails from unregulated 12-V field supply in DIN-rail mounted PLC module. IC Role / Device Role / Timing Role: Non-isolated buck stage feeding isolated DC/DC; synchronized via RT/CLK to avoid beat frequencies. Use Value: PLL synchronization eliminates interference with CAN FD communication; HVSSOP-10 fits tight 10-mm board spacing. | Use Scenario: Powering Profibus/Modbus transceiver and microcontroller in explosion-proof enclosure with limited thermal dissipation. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with thermal shutdown (182°C) and PowerPAD™ thermal path. Use Value: RθJB = 28°C/W enables 0.5-A operation at 70°C ambient without heatsink; 0.8-V reference supports precise 2.5-V rail generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDGQRQ1 | Automotive-grade AEC-Q100, 100-V input, 0.6-A, 2.1-μA shutdown current - wider VIN but higher IQ (210 μA) | Required for automotive safety-critical modules; not qualified for industrial use without derating | Select when ISO 16750-2 load-dump immunity >60 V is mandatory and qualification documentation is required |
| MP2451DT-LF-Z | 36-V input, 0.6-A, 250-kHz fixed fSW, no PWRGD or SS/TR - lower cost but fewer features | Suitable for cost-sensitive consumer electronics where sequencing and power-good are omitted | Choose when design prioritizes BOM cost over flexibility; lacks EN-programmable UVLO and tracking capability |
Compared with LM5164QDGQRQ1 and MP2451DT-LF-Z, the TPS54040DGQR offers optimal balance of industrial-grade reliability, feature richness (PWRGD, SS/TR, Eco-Mode™), and thermal performance in HVSSOP-10 - making it ideal for non-automotive 12/24-V systems needing robustness without AEC-Q100 overhead.
Availability
TPS54040DGQR is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive aftermarket accessories, and factory automation controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS54040DGQR 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 ICs - with over 50 years of innovation in high-reliability power conversion solutions.
The TPS54040DGQR belongs to TI's SWIFT™ family of integrated DC/DC converters, designed specifically for industrial and commercial applications demanding wide-input-voltage operation, light-load efficiency, and robust fault protection.
FAQ
What is the maximum input voltage the TPS54040DGQR can safely handle?
The TPS54040DGQR has an absolute maximum input voltage rating of 47 V, but its recommended operating range is 3.5 V to 42 V. Sustained operation above 42 V risks exceeding thermal limits and degrading long-term reliability - especially under high ambient temperatures or heavy load conditions. Always observe the 42-V upper limit in production designs per TI's SLVS918B specification.
How does the TPS54040DGQR achieve high efficiency at light loads?
The TPS54040DGQR achieves high light-load efficiency through Eco-Mode™ pulse-skipping operation, which reduces switching activity when output current drops below ~10 mA. This lowers dynamic losses and cuts regulated output supply current to just 116 μA - verified in TI's efficiency vs. load curves at 12-V input and 5-V output. The mode automatically engages without external configuration.
Can the TPS54040DGQR synchronize to an external clock, and how is it configured?
Yes, the TPS54040DGQR supports external clock synchronization via its 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. Clock edges must meet minimum pulse width (40 ns) and frequency (300–2200 kHz) specs. The PLL locks within 100 μs - enabling deterministic timing alignment across multiple TPS54040DGQR devices in multi-rail systems.
What thermal performance can be expected from the TPS54040DGQR in a standard PCB layout?
In a standard 2-layer 3″×3″ board with 2-oz copper and 6 thermal vias under the PowerPAD™, the TPS54040DGQR achieves RθJB = 28°C/W. At 0.5-A load and 42-V input, typical power dissipation is ~1.2 W - resulting in ~34°C junction-to-board rise. With 70°C ambient, junction temperature stays well below the 150°C limit, confirming suitability for convection-cooled industrial enclosures.
Does the TPS54040DGQR support adjustable output voltage, and what is the minimum achievable value?
Yes, the TPS54040DGQR supports fully adjustable output voltage using an external resistor divider on the VSENSE pin. The minimum output is set by its internal 0.8-V reference - meaning the lowest stable regulated output is 0.8 V (e.g., for powering low-voltage FPGAs or precision analog circuits). Output accuracy is ±2% over temperature due to bandgap reference stability.
TPS54040DGQR 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:
- 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-HVSSOP
TPS54040DGQR FAQ
1.How can I place an order for TPS54040DGQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54040DGQR 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 TPS54040DGQR reliable?
The price and inventory of TPS54040DGQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54040DGQR is usually 5 days.
3.What payment methods are accepted for TPS54040DGQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54040DGQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54040DGQR?
TPS54040DGQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54040DGQR 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 TPS54040DGQR?
For technical support, including TPS54040DGQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54040DGQR requirements.
6.How does Aetrix verify that TPS54040DGQR is sourced from the original manufacturer or authorized distributors?
All TPS54040DGQR 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 TPS54040DGQR meets industry standards.
7.What is the process for return or replacement of TPS54040DGQR?
All TPS54040DGQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54040DGQR, 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 TPS54040DGQR part is unused and in its original packaging.
Return procedure for TPS54040DGQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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