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Texas Instruments TPS57040QDGQRQ1
- Part No.:
- TPS57040QDGQRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS57040QDGQRQ1.pdf
- Description:
- IC REG BUCK ADJ 500MA 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,035
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Product details
Overview
TPS57040QDGQRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 42-V, 0.5-A automotive buck converter with integrated 200-mΩ high-side MOSFET, Eco-mode™ pulse-skipping control, and 116-μA quiescent current - designed for 12-V/24-V automotive body electronics and passive safety systems requiring stable low-power regulation.
For engineers reviewing the TPS57040QDGQRQ1 datasheet, TPS57040QDGQRQ1 pinout, TPS57040QDGQRQ1 application, or TPS57040QDGQRQ1 equivalent, key selection criteria include input voltage range (3.5–42 V), adjustable switching frequency (100 kHz–2.5 MHz), power-good accuracy (±8% window), thermal shutdown (182°C), and MSOP-PowerPAD™ package compatibility with automotive layout constraints.
Technical Context
The TPS57040QDGQRQ1 implements peak current-mode control with internal slope compensation to prevent subharmonic oscillation across 0–100% duty cycle. Its Eco-mode™ dynamically disables switching at light loads while maintaining regulation via COMP pin clamping at 500 mV and sustaining PLL synchronization.
It integrates boot UVLO (2.1 V BOOT–PH threshold) enabling >99% effective duty cycle in dropout, plus a dedicated PWRGD comparator with 92–109% output voltage window and open-drain output. The SS/TR pin supports both slow-start timing (via external capacitor) and supply sequencing (via resistor divider).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 42 V - supports direct connection to automotive battery rails including cold-crank transients up to 42 V. |
| Output Current | 0.5 A continuous - sufficient for microcontrollers, sensors, and CAN transceivers in body control modules. |
| Quiescent Current | 116 μA in Eco-mode - enables always-on operation without excessive battery drain in vehicle sleep modes. |
| Switching Frequency | 100 kHz to 2.5 MHz - adjustable via RT/CLK resistor or external clock sync; allows optimization of inductor size vs. EMI. |
| Power-Good Window | 92% to 109% of nominal VOUT - provides robust fault detection for downstream logic reset and system monitoring. |
| Thermal Shutdown | 182°C junction temperature - protects against sustained overload or poor heatsinking in enclosed automotive enclosures. |
| Reference Voltage | 0.8 V ±1.5% - sets output voltage via external resistor divider; stable over –40°C to +125°C ambient. |
| High-Side RDS(on) | 200 mΩ at 12 V VIN - enables high-efficiency conversion at mid-load; reduces thermal stress vs. discrete solutions. |
Pinout & Package
TPS57040QDGQRQ1 is housed in a thermally enhanced 10-pin MSOP-PowerPAD™ package (DGQ), with exposed thermal pad electrically connected to GND for improved heat dissipation in automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PH | High-side MOSFET source | Connects to inductor node; carries full switching current; requires low-inductance layout to minimize ringing. |
| VIN | Main input supply | Accepts 3.5–42 V; must be decoupled near package with ≥10 μF ceramic + bulk capacitance. |
| GND | Power and signal ground | Common reference for all analog and power circuits; tied directly to thermal pad for thermal and EMI performance. |
| BOOT | Bootstrap gate drive supply | Requires 0.1-μF X7R/X5R ceramic capacitor to PH; enables high-side MOSFET drive above VIN. |
| VSENSE | Error amplifier inverting input | Monitors feedback voltage; compares to 0.8-V internal reference to regulate output via external resistor divider. |
| COMP | Error amplifier output | Drives current-mode PWM comparator; connects to external RC network for loop compensation stability. |
| EN | Enable / UVLO control | Pull below 1.2 V to disable; float or pull up to enable; configurable UVLO threshold using resistor divider. |
| RT/CLK | Frequency set / sync input | Resistor-to-ground sets fSW; pulled above 2.2 V to accept external clock edges for system-level synchronization. |
| SS/TR | Slow-start / tracking control | Capacitor sets soft-start time; resistor divider enables precise power-up sequencing with other rails. |
| PWRGD | Open-drain power-good output | Asserts low when VOUT is outside 92–109% window; requires external pull-up for MCU reset or status monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode™ pulse skipping | Reduces no-load input current to 116 μA while maintaining regulation - critical for automotive always-on domains. |
| Integrated boot diode | Eliminates external bootstrap diode; simplifies layout and improves reliability in high-vibration environments. |
| Adjustable UVLO with hysteresis | EN pin supports resistor-programmable startup voltage and hysteresis - prevents brownout oscillation during cranking. |
| Frequency foldback | Automatically lowers fSW during startup and overload - limits inductor current and improves fault recovery margin. |
| Overvoltage protection masking | Disables high-side switch when PWRGD detects >109% VOUT - prevents destructive output overshoot during load dump. |
| Thermal shutdown with hysteresis | Shuts down at 182°C and restarts only after cooling - avoids thermal cycling in confined under-hood locations. |
Applications
| Automotive Body Control Module (BCM) | Passive Safety System Power |
|---|---|
Use Scenario: Powers microcontroller, LIN transceivers, and door-lock actuators in BCMs operating from 12-V battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary 3.3-V or 5-V step-down regulator delivering regulated rail with Eco-mode™ for low-quiescent standby. Use Value: 116-μA quiescent current extends battery life during vehicle sleep; 42-V input withstands load-dump transients per ISO 7637-2. |
Use Scenario: Supplies airbag diagnostic monitor and brake control unit logic from 24-V commercial vehicle battery. IC Role / Device Role / Timing Role: High-reliability buck converter with AEC-Q100 Grade 1 qualification and 182°C thermal shutdown. Use Value: 200-mΩ RDS(on) minimizes self-heating in sealed enclosures; PWRGD output triggers fail-safe shutdown on output fault. |
| Aftermarket Infotainment Supply | Industrial 24-V Sensor Hub |
Use Scenario: Powers GPS module, display driver, and audio codec in dash-mounted video systems powered by 12-V accessory circuit. IC Role / Device Role / Timing Role: Adjustable-frequency buck regulator synchronized to system clock via RT/CLK pin to reduce EMI. Use Value: 100 kHz–2.5 MHz fSW tuning avoids sensitive RF bands; SS/TR pin enables clean power-up sequencing with display backlight. |
Use Scenario: Regulates 5-V rail for industrial IoT sensor nodes in factory automation equipment powered from 24-V DC bus. IC Role / Device Role / Timing Role: Automotive-grade DC-DC converter deployed in harsh industrial environments requiring extended temperature support. Use Value: –40°C to +125°C ambient rating ensures operation in uncontrolled enclosures; EN pin enables remote power cycling via PLC I/O. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480-Q1 | Higher 8-A output, 2.2-MHz fixed fSW, no Eco-mode™, larger QFN package | Targets high-current ADAS domain controllers, not low-power body electronics | Select when >0.5-A output or higher switching frequency is required; not drop-in due to different pinout and control scheme. |
| TPS54340QDGQRQ1 | Same 42-V input, 3.5-A output, 100-kHz–2.5-MHz fSW, but uses voltage-mode control and lacks PWRGD | Suitable for non-safety-critical 12-V systems where power-good signaling is optional | Choose for higher current needs with identical package footprint; verify loop compensation and sequencing requirements differ. |
Compared with LM61480-Q1 and TPS54340QDGQRQ1, the TPS57040QDGQRQ1 uniquely balances ultra-low quiescent current (116 μA), integrated PWRGD, and AEC-Q100-compliant thermal behavior in a compact MSOP-PowerPAD™ - making it optimal for cost-sensitive, space-constrained automotive low-power rails.
Availability
TPS57040QDGQRQ1 is available at Aetrix Electronics and suitable for automotive body electronics, passive safety systems, aftermarket infotainment, and industrial 24-V sensor hubs requiring stable component supply across extended temperature and long product lifecycles.
Supply support for TPS57040QDGQRQ1 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 TPS57040-Q1 belongs to TI's automotive-qualified DC-DC buck converter family, engineered specifically for AEC-Q100 Grade 1 operation in body electronics and passive safety systems demanding high reliability and low quiescent power.
FAQ
What is the minimum input voltage required for TPS57040QDGQRQ1 to start switching?
The TPS57040QDGQRQ1 has an internally set undervoltage lockout (UVLO) threshold of 2.5 V. However, this can be increased using an external resistor divider on the EN pin. Startup occurs when VIN exceeds the configured UVLO rising threshold, and the device remains enabled until VIN falls below the falling threshold - which may include hysteresis depending on EN biasing. The absolute minimum VIN for functional operation is 3.5 V per recommended conditions.
Does TPS57040QDGQRQ1 support synchronization to an external clock signal?
Yes, the TPS57040QDGQRQ1 supports external clock synchronization via the RT/CLK pin. When the voltage on this pin exceeds 2.2 V (typical), the internal oscillator amplifier disables and the pin becomes a high-impedance clock input to the internal PLL. It accepts external clock edges between 300 kHz and 2.2 MHz, and automatically reverts to resistor-set mode if clocking stops - ensuring robust operation during system clock interruptions.
How does the Eco-mode™ function in TPS57040QDGQRQ1 affect light-load efficiency?
In Eco-mode™, the TPS57040QDGQRQ1 skips switching pulses when output load current drops below a threshold determined by inductor value and COMP pin dynamics - reducing gate drive and switching losses. This lowers no-load input current to 116 μA while maintaining regulation. The COMP pin is clamped at 500 mV during skip cycles, and the device resumes normal PWM operation only when the error amplifier drives COMP above that level to recharge the output.
What is the role of the SS/TR pin in TPS57040QDGQRQ1, and how is it configured for sequencing?
The SS/TR pin in TPS57040QDGQRQ1 controls soft-start timing and enables supply sequencing. For soft-start, a capacitor from SS/TR to GND sets output rise time. For sequencing, a resistor divider from a master supply to SS/TR overrides the internal reference - causing the TPS57040QDGQRQ1 output to track the master rail. During faults or shutdown, the SS/TR pin is actively discharged to ensure repeatable restart behavior.
Is the thermal pad of TPS57040QDGQRQ1 electrically connected, and what is its function?
Yes, the exposed thermal pad (Pin 11) of the TPS57040QDGQRQ1 is electrically connected to GND and must be soldered to a PCB copper pour tied to the system ground plane. It serves dual functions: lowering junction-to-board thermal resistance (RθJB = 28°C/W) for improved heat dissipation, and providing a low-inductance return path for high-frequency switching currents - essential for stable operation and EMI control in automotive designs.
TPS57040QDGQRQ1 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-HVSSOP
TPS57040QDGQRQ1 FAQ
1.How can I place an order for TPS57040QDGQRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS57040QDGQRQ1 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 TPS57040QDGQRQ1 reliable?
The price and inventory of TPS57040QDGQRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS57040QDGQRQ1 is usually 5 days.
3.What payment methods are accepted for TPS57040QDGQRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS57040QDGQRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS57040QDGQRQ1?
TPS57040QDGQRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS57040QDGQRQ1 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 TPS57040QDGQRQ1?
For technical support, including TPS57040QDGQRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS57040QDGQRQ1 requirements.
6.How does Aetrix verify that TPS57040QDGQRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS57040QDGQRQ1 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 TPS57040QDGQRQ1 meets industry standards.
7.What is the process for return or replacement of TPS57040QDGQRQ1?
All TPS57040QDGQRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS57040QDGQRQ1, 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 TPS57040QDGQRQ1 part is unused and in its original packaging.
Return procedure for TPS57040QDGQRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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