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Texas Instruments TPS54040QDGQRQ1
- Part No.:
- TPS54040QDGQRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS54040QDGQRQ1.pdf
- Description:
- IC REG BUCK ADJ 500MA 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,965
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Product details
Overview
TPS54040QDGQRQ1 from Texas Instruments is an AEC-Q100 qualified 42-V, 0.5-A automotive-grade step-down DC-DC converter with integrated 200-mΩ high-side MOSFET, Eco-Mode™ pulse-skipping control, 116-μA quiescent current, and adjustable 100-kHz to 2.5-MHz switching frequency. It delivers regulated 0.8-V to VIN output in infotainment power rails and ADAS camera modules.
For engineers reviewing the TPS54040QDGQRQ1 datasheet, TPS54040QDGQRQ1 pinout, TPS54040QDGQRQ1 application, or TPS54040QDGQRQ1 equivalent, key selection criteria include input voltage range (3.5–42 V), light-load efficiency via Eco-Mode™, PWRGD open-drain power-good signaling, RT/CLK synchronization capability, and thermal performance in MSOP PowerPAD™ package.
Technical Context
The TPS54040QDGQRQ1 implements constant-frequency peak current-mode control with internal slope compensation to prevent subharmonic oscillation across 0–100% duty cycle. Its error amplifier drives COMP with transconductance of 97 μ℧ (typ) and 26 μ℧ during slow start, enabling stable loop response with minimal external compensation.
It integrates boot UVLO (2.1 V threshold), frequency foldback during overload, and thermal shutdown at 182°C. The RT/CLK pin supports dual-mode operation: resistor-set frequency (100–2500 kHz) or external clock synchronization (300–2200 kHz), with PLL lock-in time under 100 μs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 42 V - supports 12-V and 24-V automotive battery systems with cold-crank margin. |
| Output Current | 0.5 A continuous - sufficient for low-power ADAS sensors, display bias, and audio amplifiers. |
| Switching Frequency | 100 kHz to 2.5 MHz - enables optimization of inductor size and EMI filtering for space-constrained layouts. |
| Quiescent Current | 116 μA - maintains high light-load efficiency in always-on vehicle subsystems. |
| Shutdown Current | 1.3 μA - minimizes battery drain during vehicle sleep mode. |
| Reference Voltage | 0.8 V ±1.6% - sets precise output regulation point; adjustable via external resistor divider on VSENSE. |
| Power-Good Threshold | 92% to 109% of nominal VOUT - provides robust fault detection for system sequencing and safety monitoring. |
Pinout & Package
TPS54040QDGQRQ1 is housed in a thermally enhanced 10-pin MSOP PowerPAD™ package (DGQ), with exposed thermal pad electrically connected to GND for optimal PCB heat dissipation (RθJB = 28°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PH (Pin 10) | High-side MOSFET source | Connects to inductor node; carries full switch current and defines bootstrap recharge path. |
| BOOT (Pin 1) | Bootstrap gate drive supply | Requires 0.1-μF X7R/X5R ceramic capacitor to PH; monitored by internal UVLO for safe high-side turn-on. |
| VIN (Pin 2) | Main input supply | Accepts 3.5–42 V; powers internal circuitry and high-side driver; includes 2.5-V fixed UVLO (adjustable via EN). |
| GND (Pin 9) | Power and signal ground | Common reference for all analog and power circuits; must be tied to thermal pad for thermal and electrical integrity. |
| VSENSE (Pin 7) | Error amplifier inverting input | Monitors output via resistor divider; compares against 0.8-V reference to regulate output voltage. |
| COMP (Pin 8) | Error amplifier output | Drives PWM comparator; connects to Type II/III compensation network for loop stability. |
| EN (Pin 3) | Enable / UVLO adjust | Pull below 1.2 V to disable; floating enables device; external resistors set custom UVLO threshold and hysteresis. |
| SS/TR (Pin 4) | Slow-start / tracking control | Capacitor sets soft-start time; external voltage overrides reference for power sequencing or tracking. |
| RT/CLK (Pin 5) | Frequency setting / sync input | Resistor-to-GND sets fSW; external clock edges above 1.9 V trigger PLL sync mode (300–2200 kHz). |
| PWRGD (Pin 6) | Open-drain power-good flag | Asserts low when VOUT < 92% or > 109% of target; requires external pull-up for system reset or enable sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-Mode™ pulse-skipping | Reduces no-load input current to 116 μA while maintaining regulation-critical for automotive standby power budgets. |
| Integrated boot diode | Eliminates external boot diode, reducing BOM count and layout area without sacrificing gate-drive reliability. |
| Adjustable UVLO with hysteresis | EN pin supports resistor-divider configuration to raise UVLO threshold and add hysteresis-prevents brownout oscillation during battery sag. |
| Overvoltage protection via PWRGD | OV comparator disables high-side MOSFET when VSENSE exceeds 109%, limiting output overshoot during load dump or transient events. |
| Thermal shutdown with recovery | Shuts down at 182°C junction temperature and automatically restarts after cooldown-enables robust operation in sealed enclosures. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers LCD display backlight drivers and audio codec ICs in head units with variable battery input (9–16 V). IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3 V or 5 V from unregulated 12-V rail; PWRGD signals MCU when output is valid. Use Value: Eco-Mode™ maintains >85% efficiency at 10-mA load, extending runtime during key-off monitoring. |
Use Scenario: Supplies image sensor and ISP in rear-view camera modules exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: High-reliability 5-V supply with thermal shutdown and wide-input tolerance; SS/TR enables synchronized startup with host processor. Use Value: 150°C max junction rating and RθJB = 28°C/W ensure stable operation at 85°C ambient without derating. |
| Body Control Unit (BCU) Subsystem | Wireless Charging Base Station |
Use Scenario: Generates 3.3-V logic supply for HVAC controller microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Secondary regulator fed from main 5-V rail; EN pin tied to ignition-sense signal for automatic power-up/down. Use Value: 1.3-μA shutdown current prevents parasitic battery drain over weeks of vehicle inactivity. |
Use Scenario: Provides isolated 12-V bias for Qi transmitter coil drivers and communication ICs in OEM wireless charging pads. IC Role / Device Role / Timing Role: Input-filtered buck stage accepting 24-V vehicle supply; RT/CLK synchronized to system clock to reduce EMI coupling into RF bands. Use Value: 2.5-MHz max switching frequency allows use of small 1-μH inductors, minimizing footprint in compact charging cradles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5143AQDGQRQ1 | 2.2-MHz max fSW, 3-A output, dual-channel interleaved; larger 14-pin WQFN package. | Suited for higher-current ADAS radar supplies; not drop-in due to different pinout and control architecture. | Select when >0.5-A output or interleaved noise reduction is required; requires PCB redesign. |
| TPS54340QDGQRQ1 | Same DGQ package and pinout; 3-A output, 110-μA IQ, but lacks Eco-Mode™ and has fixed 2.5-V UVLO. | Better for high-current body electronics where light-load efficiency is secondary to peak delivery. | Drop-in replacement only if output current ≥3 A is needed and Eco-Mode™ is not required. |
Compared with LM5143AQDGQRQ1 and TPS54340QDGQRQ1, the TPS54040QDGQRQ1 offers optimal balance of ultra-low quiescent current, automotive qualification, and compact 10-pin MSOP PowerPAD™ footprint for sub-1-A applications-making it ideal for cost- and space-sensitive infotainment and camera subsystems.
Availability
TPS54040QDGQRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control unit designs requiring stable component supply with AEC-Q100 qualification and long-term production support.
Supply support for TPS54040QDGQRQ1 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 deep expertise in automotive-grade power management ICs.
The TPS54040-Q1 product line delivers high-voltage, low-quiescent-current buck regulators engineered specifically for automotive subsystems demanding AEC-Q100 compliance, extended temperature operation, and robust fault protection.
FAQ
What is the maximum input voltage rating for the TPS54040QDGQRQ1?
The TPS54040QDGQRQ1 has an absolute maximum input voltage rating of 47 V, with recommended operating range from 3.5 V to 42 V. This allows reliable operation across automotive battery conditions including cold-crank (down to ~6 V) and load-dump transients (up to 42 V), while maintaining functional safety margins per AEC-Q100 requirements.
How does the Eco-Mode™ function improve efficiency in the TPS54040QDGQRQ1?
Eco-Mode™ in the TPS54040QDGQRQ1 enables pulse-skipping operation at light loads, reducing switching losses and lowering quiescent current to 116 μA. This extends battery life in always-on vehicle subsystems such as telematics and proximity sensors, where typical load currents fall below 50 mA and conventional PWM would waste significant energy.
Can the TPS54040QDGQRQ1 synchronize to an external clock, and what are the timing requirements?
Yes, the TPS54040QDGQRQ1 supports external clock synchronization via the RT/CLK pin. When driven with a clean CMOS clock signal exceeding 1.9 V (high threshold) and below 0.7 V (low threshold), it enters PLL sync mode with 300–2200 kHz input range. Minimum pulse width is 40 ns, and PLL lock-in time is under 100 μs-enabling deterministic EMI reduction in multi-rail automotive systems.
What thermal performance can be expected from the TPS54040QDGQRQ1 in its MSOP PowerPAD™ package?
In standard JEDEC 2-layer board conditions, the TPS54040QDGQRQ1 achieves RθJA = 62.5°C/W. With proper PCB layout-including 6 thermal vias under the exposed pad-the junction-to-board resistance drops to RθJB = 28°C/W, allowing 0.5-A continuous operation at up to 85°C ambient without derating. Thermal shutdown activates at 182°C to protect against sustained overload.
How is the power-good (PWRGD) signal configured and used in system design with the TPS54040QDGQRQ1?
The PWRGD pin on the TPS54040QDGQRQ1 is an open-drain output that asserts low when VSENSE falls below 92% or rises above 109% of nominal output voltage. A pull-up resistor to system rail enables direct connection to MCU reset inputs or enable pins of downstream regulators, ensuring safe power sequencing and fault isolation in automotive ECUs.
TPS54040QDGQRQ1 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:
- Obsolete
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-HVSSOP
TPS54040QDGQRQ1 FAQ
1.How can I place an order for TPS54040QDGQRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54040QDGQRQ1 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 TPS54040QDGQRQ1 reliable?
The price and inventory of TPS54040QDGQRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54040QDGQRQ1 is usually 5 days.
3.What payment methods are accepted for TPS54040QDGQRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54040QDGQRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54040QDGQRQ1?
TPS54040QDGQRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54040QDGQRQ1 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 TPS54040QDGQRQ1?
For technical support, including TPS54040QDGQRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54040QDGQRQ1 requirements.
6.How does Aetrix verify that TPS54040QDGQRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS54040QDGQRQ1 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 TPS54040QDGQRQ1 meets industry standards.
7.What is the process for return or replacement of TPS54040QDGQRQ1?
All TPS54040QDGQRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54040QDGQRQ1, 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 TPS54040QDGQRQ1 part is unused and in its original packaging.
Return procedure for TPS54040QDGQRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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