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Texas Instruments TPS54040QDRCRQ1
- Part No.:
- TPS54040QDRCRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54040QDRCRQ1.pdf
- Description:
- IC REG BUCK ADJ 500MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,246
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Product details
Overview
TPS54040QDRCRQ1 from Texas Instruments is an automotive-grade 42-V input, 0.5-A synchronous step-down DC/DC converter with integrated 200-mΩ high-side MOSFET, 0.8-V internal reference, Eco-mode™ pulse-skipping at light loads, and 100-kHz to 2.5-MHz adjustable switching frequency. It delivers regulated 3.3-V or 5-V outputs in compact 10-pin SON packages for vehicle infotainment power rails.
For engineers reviewing the TPS54040QDRCRQ1 datasheet, TPS54040QDRCRQ1 pinout, TPS54040QDRCRQ1 application, or TPS54040QDRCRQ1 equivalent, key selection considerations include its AEC-Q100 qualification, 116-μA no-load quiescent current, adjustable UVLO via EN pin, open-drain PWRGD output with ±7% threshold hysteresis, and thermal shutdown at 182°C.
Technical Context
This current-mode buck regulator implements fixed-frequency PWM control with slope compensation to prevent subharmonic oscillation across full duty-cycle range. Its transconductance error amplifier (97 m℧ typical) compares VSENSE against either 0.8-V internal reference or SS/TR voltage, enabling precise output regulation and tracking.
The device integrates boot UVLO (2.1 V BOOT–PH threshold), frequency foldback during overload, and a PLL-synchronized RT/CLK interface supporting external clock synchronization from 300 kHz to 2.2 MHz. Pulse-skip Eco-mode™ activates when peak switch current falls below ~500 mV COMP clamp, reducing light-load losses without compromising transient response.
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 rails with cold-crank margin |
| Output Current | 0.5 A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers |
| Switching Frequency | 100 kHz to 2.5 MHz - adjustable via RT resistor or external clock; enables optimization of size vs. efficiency |
| Quiescent Current | 116 μA - enables low-power always-on operation in vehicle body control modules |
| Reference Voltage | 0.8 V ±2% - sets minimum output voltage; used with resistor divider for precise output programming |
| Power Good Threshold | 94% to 107% of VREF - provides reliable system reset signaling with built-in hysteresis |
| Thermal Shutdown | 182°C - protects against sustained overload or poor PCB thermal design |
Pinout & Package
TPS54040QDRCRQ1 uses a 10-pin 3 mm × 3 mm SON (DRC) package with exposed thermal pad (Pin 11). The thermally enhanced layout supports 56.5°C/W junction-to-ambient thermal resistance under standard 2-layer PCB conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects to 0.1-μF ceramic capacitor between BOOT and PH; supplies gate drive for high-side MOSFET |
| VIN | Main input supply | Accepts 3.5–42 V; powers internal circuitry and high-side switch; requires local bulk capacitance |
| EN | Enable / UVLO control | Pull ≤1.25 V to disable; internal 0.9-mA pull-up enables floating operation; supports adjustable UVLO with resistive divider |
| PH | Power switch source | Connects to external inductor; carries high di/dt switching current; must be routed with low-inductance path |
| GND | Power and signal ground | Common return for VIN, PH, and thermal pad; requires low-impedance connection to PCB ground plane |
| COMP | Error amplifier output | Drives external RC compensation network; sets loop stability and transient response |
| VSENSE | Feedback input | Inverting input of transconductance amplifier; monitors output via resistor divider; max 3-V rating |
| PWRGD | Power good indicator | Open-drain output asserting low when VOUT deviates >6% from nominal; requires external pull-up |
| SS/TR | Slow-start / tracking | Controls output ramp rate via external capacitor; supports sequencing with external voltage reference |
| RT/CLK | Frequency setting / sync input | Configurable as resistor-set oscillator (100–2500 kHz) or high-impedance clock input (300–2200 kHz) |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode™ pulse skipping | Reduces light-load quiescent current to 116 μA while maintaining regulation and fast wake-up |
| Adjustable UVLO with hysteresis | EN pin supports programmable start/stop thresholds (e.g., 9 V start / 7.5 V stop) using two resistors |
| Integrated boot diode | Eliminates need for external bootstrap diode; reduces BOM count and improves reliability |
| PLL-based clock synchronization | Enables deterministic switching alignment with system clock, reducing EMI peaks and aiding spread-spectrum design |
| Overvoltage protection | Disables high-side switch if VSENSE exceeds 109% VREF, preventing damage to downstream loads |
| Thermal foldback | Reduces switching frequency during overtemperature events to limit power dissipation before shutdown |
Applications
| Automotive Infotainment Power | Industrial Sensor Node Supply |
|---|---|
|
Use Scenario: Powering GPS module, display backlight driver, and audio codec in aftermarket head unit. IC Role / Device Role / Timing Role: Primary 5-V buck regulator delivering stable rail under wide-input battery conditions (6–16 V). Use Value: 116-μA quiescent current extends battery life during vehicle sleep mode; PWRGD signals MCU when 5-V rail is valid. |
Use Scenario: Providing 3.3-V supply to CAN transceiver, temperature sensor, and low-power MCU in factory automation node. IC Role / Device Role / Timing Role: Compact, AEC-Q100 qualified DC/DC converter operating from 24-V industrial bus. Use Value: 42-V max input withstands load-dump transients; SS/TR pin enables controlled power-up sequencing with host controller. |
| Aftermarket Video Camera Module | Telematics Control Unit (TCU) Core Rail |
|
Use Scenario: Regulating 3.3-V supply for image sensor and video processor in dashcam powered from car cigarette lighter. IC Role / Device Role / Timing Role: High-efficiency buck converter handling cold-crank (6-V) and load-dump (40-V) events. Use Value: 200-mΩ MOSFET and Eco-mode enable >90% efficiency at 100-mA load; thermal shutdown prevents field failure. |
Use Scenario: Generating 1.2-V core supply for ARM Cortex-M7 MCU in connected vehicle gateway. IC Role / Device Role / Timing Role: Pre-regulator feeding low-noise LDO; configured for 500-kHz switching to balance EMI and inductor size. Use Value: RT/CLK synchronization eliminates beat frequencies with CAN FD timing; PWRGD coordinates safe boot sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | 42-V, 0.6-A, 100-kHz–2.2-MHz, higher IQ (200 μA), no integrated boot diode | Requires external bootstrap diode; better suited for ultra-low-noise designs where Eco-mode ripple is unacceptable | Choose LM5164QDDARQ1 when higher output current or tighter output voltage tolerance (±0.5%) is required |
| TPS54340QDAPRQ1 | 42-V, 3.5-A, same pinout family but larger DAP package; 100-kHz–2.5-MHz, 145-μA IQ | Higher current capability; not drop-in due to different thermal pad layout and current-sense resistor placement | Choose TPS54340QDAPRQ1 only when >0.5-A load current is needed and board space allows larger 8-pin HSOIC |
Compared with LM5164QDDARQ1 and TPS54340QDAPRQ1, TPS54040QDRCRQ1 offers the smallest footprint (3 mm × 3 mm SON), lowest quiescent current among 0.5-A automotive buck regulators, and integrated boot diode-making it optimal for space-constrained infotainment peripherals requiring minimal external components.
Availability
TPS54040QDRCRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor nodes, aftermarket video modules, and telematics control units requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for TPS54040QDRCRQ1 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 deep expertise in automotive-grade reliability and functional safety.
TPS54040QDRCRQ1 belongs to TI's SWIFT™ family of high-voltage DC/DC converters, designed specifically for robust, efficient power conversion in automotive and industrial environments where wide input range and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum input voltage rating for TPS54040QDRCRQ1?
The absolute maximum input voltage for TPS54040QDRCRQ1 is 47 V, but the recommended operating range is 3.5 V to 42 V. This allows safe operation during automotive load-dump events up to 40 V while maintaining regulation. Exceeding 42 V continuously may trigger thermal shutdown or reduce long-term reliability, even if within absolute maximum ratings.
Does TPS54040QDRCRQ1 support external clock synchronization?
Yes, TPS54040QDRCRQ1 supports external clock synchronization via the RT/CLK pin. When driven above 2.2 V threshold, the internal oscillator disables and the pin becomes a high-impedance clock input accepting 300 kHz to 2.2 MHz square-wave signals. This enables deterministic switching alignment for EMI reduction and multi-rail coordination in complex automotive ECUs.
How does the Eco-mode™ function in TPS54040QDRCRQ1 improve efficiency?
TPS54040QDRCRQ1 enters Eco-mode™ when peak switch current falls below ~500 mV COMP clamp level-typically at light loads (<20 mA for common 5-V/4.7-μH designs). In this mode, the high-side MOSFET stops switching, reducing gate drive and switching losses. Output voltage decay triggers reactivation, achieving 116-μA quiescent current while maintaining regulation and fast transient recovery.
Can TPS54040QDRCRQ1 be used without an external bootstrap diode?
Yes, TPS54040QDRCRQ1 integrates the bootstrap diode, eliminating the need for an external component. A 0.1-μF X7R/X5R ceramic capacitor must still be placed between BOOT and PH pins to sustain gate drive voltage. This integration reduces BOM count, PCB area, and potential failure points-critical for automotive applications demanding high reliability.
What is the purpose of the SS/TR pin on TPS54040QDRCRQ1?
The SS/TR pin on TPS54040QDRCRQ1 controls output voltage ramp rate during startup (slow-start) or tracks another voltage rail (tracking). Connecting a capacitor sets soft-start time; applying an external reference enables precise sequencing with other power supplies. During faults, the pin discharges to ensure repeatable restart behavior-essential for automotive systems requiring deterministic power-up sequences.
TPS54040QDRCRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Eco-Mode™
- Package/Case:
- 10-VFDFN Exposed Pad
- 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-VSON (3x3)
TPS54040QDRCRQ1 FAQ
1.How can I place an order for TPS54040QDRCRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54040QDRCRQ1 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 TPS54040QDRCRQ1 reliable?
The price and inventory of TPS54040QDRCRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54040QDRCRQ1 is usually 5 days.
3.What payment methods are accepted for TPS54040QDRCRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54040QDRCRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54040QDRCRQ1?
TPS54040QDRCRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54040QDRCRQ1 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 TPS54040QDRCRQ1?
For technical support, including TPS54040QDRCRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54040QDRCRQ1 requirements.
6.How does Aetrix verify that TPS54040QDRCRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS54040QDRCRQ1 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 TPS54040QDRCRQ1 meets industry standards.
7.What is the process for return or replacement of TPS54040QDRCRQ1?
All TPS54040QDRCRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54040QDRCRQ1, 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 TPS54040QDRCRQ1 part is unused and in its original packaging.
Return procedure for TPS54040QDRCRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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