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Texas Instruments TPS57040QDRCRQ1
- Part No.:
- TPS57040QDRCRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS57040QDRCRQ1.pdf
- Description:
- IC REG BUCK ADJ 500MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,669
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Product details
Overview
TPS57040QDRCRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 42-V input, 0.5-A synchronous step-down DC-DC converter with integrated 200-mΩ high-side MOSFET, Eco-mode™ pulse-skipping control, and adjustable 100-kHz to 2.5-MHz switching frequency. It delivers regulated output down to 0.8 V in automotive body electronics and passive safety systems.
For engineers reviewing the TPS57040QDRCRQ1 datasheet, TPS57040QDRCRQ1 pinout, TPS57040QDRCRQ1 application, or TPS57040QDRCRQ1 equivalent, key selection criteria include its 116-μA no-load quiescent current, 1.5-μA shutdown current, open-drain PWRGD monitoring (92–109% window), RT/CLK synchronization capability, and thermal-enhanced 10-pin VSON (DRC) package with exposed thermal pad.
Technical Context
The TPS57040QDRCRQ1 implements constant-frequency peak current-mode control with internal slope compensation to prevent subharmonic oscillation across full duty cycle range. Its error amplifier drives COMP with transconductance of 97 μ℧ (typ) and 26 μ℧ during slow start, enabling stable loop compensation using external RC networks on COMP and SS/TR pins.
It integrates a boot UVLO circuit that disables the high-side MOSFET when BOOT–PH falls below 2.1 V, enabling >99% effective duty cycle operation while ensuring reliable gate drive refresh. The device supports both resistor-set (RT mode) and external clock-synchronized (CLK mode) operation via the RT/CLK pin, with PLL lock-in time of 100 μs and minimum CLK pulse width of 40 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 42 V - supports direct connection to 12-V and 24-V automotive batteries with transient tolerance up to 47 V absolute max. |
| Output Current | 0.5 A continuous - sufficient for microcontrollers, sensors, and CAN transceivers in automotive ECUs. |
| Quiescent Current | 116 μA (no load, Eco-mode active) - enables always-on subsystems without excessive battery drain. |
| Shutdown Current | 1.5 μA (EN = low) - meets automotive sleep-mode requirements for infotainment and telematics modules. |
| Switching Frequency | 100 kHz to 2.5 MHz - allows optimization of inductor size and EMI filtering; configurable via RT resistor or external clock sync. |
| Reference Voltage | 0.8 V ±1.6% (0.784–0.816 V) - sets precise output regulation threshold; used with external resistor divider on VSENSE. |
| Power-Good Window | 92% to 109% of nominal VOUT - provides robust fault detection for downstream logic and sequencing controllers. |
Pinout & Package
The TPS57040QDRCRQ1 is housed in a thermally enhanced 10-pin VSON (DRC) package measuring 3.00 mm × 3.00 mm with an exposed thermal pad (Pin 11) that must be soldered to PCB ground for proper thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects to 0.1-μF ceramic capacitor between BOOT and PH; supplies gate drive voltage for internal high-side MOSFET. |
| COMP | Error amplifier output | Drives PWM comparator; connect Type II/III compensation network here for loop stability. |
| EN | Enable / UVLO control input | Pull below 1.2 V to disable; float or pull up to enable; configure UVLO threshold with resistor divider to VIN. |
| GND | Power and signal ground | Common reference for all analog and power circuits; electrically tied to exposed thermal pad. |
| PH | High-side MOSFET source | Connects to switch node; ties to inductor and output capacitor; critical for boot capacitor recharge path. |
| PWRGD | Open-drain power-good indicator | Asserts low when VSENSE is outside 92–109% window; requires external pull-up resistor to system rail. |
| RT/CLK | Frequency configuration/sync input | Resistor-to-ground sets fSW (100 kHz–2.5 MHz); pulled above 2.2 V to enter external clock sync mode. |
| SS/TR | Slow-start/tracking control | Capacitor sets soft-start ramp time; voltage override enables output tracking during power sequencing. |
| VIN | Main input supply | Accepts 3.5–42 V; includes internal UVLO at 2.5 V (adjustable via EN pin). |
| VSENSE | Feedback input | Inverting input of transconductance error amplifier; connects to resistor divider from VOUT to set regulated output voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode™ pulse-skipping | Reduces no-load input current to 116 μA by disabling switching cycles while maintaining regulation-critical for automotive always-on domains. |
| Integrated boot diode | Eliminates need for external bootstrap diode, reducing BOM count and layout complexity in space-constrained automotive modules. |
| Adjustable UVLO with EN pin | Enables custom input voltage turn-on/off thresholds using two resistors-supports cold-cranking and battery-save modes in vehicle systems. |
| Thermal shutdown + frequency foldback | Protects against overload by reducing fSW during overcurrent events and halting switching above 182°C junction temperature. |
| Open-drain PWRGD with hysteresis | Provides reliable power-rail monitoring with 2% hysteresis and <50 Ω on-resistance-compatible with 1.8-V to 5-V logic interfaces. |
Applications
| Automotive Body Control Module (BCM) | Passive Safety System Power |
|---|---|
Use Scenario: Powers microcontroller, LIN transceivers, and LED drivers in door modules and lighting control units. IC Role / Device Role / Timing Role: Primary 3.3-V or 5-V point-of-load regulator delivering stable supply under wide input transients (load dump, cold crank). Use Value: 116-μA quiescent current prevents battery drain during vehicle sleep; PWRGD enables safe MCU reset sequencing. | Use Scenario: Supplies airbag diagnostic controller and brake actuator logic in ASIL-B compliant subsystems. IC Role / Device Role / Timing Role: Safety-critical 5-V rail generator with AEC-Q100 Grade 1 qualification (–40°C to 125°C ambient). Use Value: Thermal shutdown and frequency foldback ensure fail-safe response during short-circuit faults; SS/TR enables controlled power-up of safety ICs. |
| Aftermarket Vehicle Infotainment | 12-V Industrial Sensor Hub |
Use Scenario: Powers GPS receiver, display driver, and audio codec in dash-mounted navigation systems. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter operating from noisy 12-V vehicle bus with minimal heatsinking. Use Value: 3.0 mm × 3.0 mm VSON package saves board area; Eco-mode extends runtime in battery-backed operation. | Use Scenario: Regulates 3.3-V supply for industrial IoT sensor nodes deployed in harsh environments. IC Role / Device Role / Timing Role: Robust DC-DC stage tolerant to 42-V surges and –40°C to 125°C operation without derating. Use Value: 200-mΩ integrated MOSFET achieves >90% efficiency at 0.3-A load; RT/CLK sync enables EMI spread-spectrum control. |
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 |
|---|---|---|---|
| LM61480QRNXTQ1 | Higher 8-A output current, 4.5–36-V input, fixed 2.1-MHz fSW, no Eco-mode, larger 16-pin QFN package. | Suitable for higher-power ADAS domain controllers; not drop-in due to different pinout, higher quiescent current (15 μA), and no PWRGD hysteresis. | Select when >0.5-A output or tighter EMI control is required; avoid if space-constrained or ultra-low IQ is mandatory. |
| TPS54340QDDARQ1 | 42-V input, 3.5-A output, 100-kHz–2.5-MHz adjustable fSW, 45-μA IQ, no Eco-mode, 8-pin SO PowerPAD™. | Better suited for motor drivers and HVAC actuators; lacks PWRGD window hysteresis and SS/TR tracking capability. | Choose for higher current needs where footprint allows SO-8; not recommended for light-load efficiency-sensitive designs. |
Compared with LM61480QRNXTQ1 and TPS54340QDDARQ1, the TPS57040QDRCRQ1 uniquely balances ultra-low quiescent current (116 μA), integrated PWRGD with 2% hysteresis, and compact 10-pin VSON packaging-making it optimal for space- and power-constrained automotive body electronics.
Availability
TPS57040QDRCRQ1 is available at Aetrix Electronics and suitable for automotive body electronics, passive safety systems, aftermarket infotainment, and 12-V industrial sensor hubs requiring stable component supply across extended temperature and lifecycle demands.
Supply support for TPS57040QDRCRQ1 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 company specializing in analog, embedded processing, and power management technologies with broad automotive qualification expertise.
The TPS57040-Q1 product line delivers AEC-Q100 Grade 1 qualified buck converters optimized for automotive power rails where low quiescent current, robust fault protection, and compact packaging are essential.
FAQ
What is the maximum input voltage rating for the TPS57040QDRCRQ1?
The TPS57040QDRCRQ1 has an absolute maximum input voltage rating of 47 V on the VIN pin, with recommended operating range from 3.5 V to 42 V. This allows direct connection to 12-V and 24-V automotive batteries while surviving load-dump transients per ISO 7637-2. Operation beyond 42 V is not recommended for sustained use, as it exceeds the specified operating conditions and may impact reliability or lifetime.
How does the Eco-mode™ function in the TPS57040QDRCRQ1 improve light-load efficiency?
The TPS57040QDRCRQ1 enters Eco-mode™ when output load current drops below the pulse-skip threshold-typically around 20 mA depending on inductor value-clamping COMP at 500 mV and disabling switching cycles. This reduces no-load input current to 116 μA by eliminating gate-drive and switching losses. The device remains regulation-capable and resumes switching synchronously upon voltage deviation, making TPS57040QDRCRQ1 ideal for always-on automotive subsystems.
Can the TPS57040QDRCRQ1 be synchronized to an external clock, and what are the timing requirements?
Yes, the TPS57040QDRCRQ1 supports external clock synchronization via the RT/CLK pin. When pulled above 2.2 V, the internal oscillator disables and RT/CLK becomes a high-impedance clock input to the internal PLL. Minimum CLK pulse width is 40 ns, and PLL lock-in time is 100 μs. Clock frequency range is 300 kHz to 2.2 MHz. Synchronization ensures deterministic EMI placement and eliminates beat frequencies in multi-rail systems using TPS57040QDRCRQ1.
What is the role of the SS/TR pin in the TPS57040QDRCRQ1, and how is it configured for power sequencing?
The SS/TR pin on the TPS57040QDRCRQ1 controls output voltage ramp rate during startup (slow start) or tracks another supply voltage (tracking). For sequencing, connect a resistor divider from a master rail to SS/TR to force the TPS57040QDRCRQ1 output to follow that rail's rise/fall profile. A capacitor from SS/TR to GND sets soft-start time; discharge occurs automatically during overtemperature, UVLO, or EN disable-ensuring repeatable restart behavior critical in automotive safety systems.
Does the TPS57040QDRCRQ1 require an external bootstrap diode, and what capacitor value is recommended between BOOT and PH?
No, the TPS57040QDRCRQ1 integrates the boot recharge diode, eliminating the need for an external component. A 0.1-μF ceramic capacitor (X7R or X5R dielectric, ≥10-V rating) is required between BOOT and PH to supply gate drive voltage for the internal high-side MOSFET. This capacitor is refreshed during low-side conduction phases. Using the correct value and dielectric ensures stable boot voltage across temperature and maintains >99% effective duty cycle capability in dropout conditions.
TPS57040QDRCRQ1 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS57040QDRCRQ1 FAQ
1.How can I place an order for TPS57040QDRCRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS57040QDRCRQ1 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 TPS57040QDRCRQ1 reliable?
The price and inventory of TPS57040QDRCRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS57040QDRCRQ1 is usually 5 days.
3.What payment methods are accepted for TPS57040QDRCRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS57040QDRCRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS57040QDRCRQ1?
TPS57040QDRCRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS57040QDRCRQ1 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 TPS57040QDRCRQ1?
For technical support, including TPS57040QDRCRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS57040QDRCRQ1 requirements.
6.How does Aetrix verify that TPS57040QDRCRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS57040QDRCRQ1 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 TPS57040QDRCRQ1 meets industry standards.
7.What is the process for return or replacement of TPS57040QDRCRQ1?
All TPS57040QDRCRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS57040QDRCRQ1, 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 TPS57040QDRCRQ1 part is unused and in its original packaging.
Return procedure for TPS57040QDRCRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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