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Texas Instruments TPS62171QDSGRQ1
- Part No.:
- TPS62171QDSGRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62171QDSGRQ1.pdf
- Description:
- IC REG BUCK 1.8V 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,314
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Product details
Overview
TPS62171QDSGRQ1 from Texas Instruments is an automotive-grade synchronous step-down DC-DC converter with fixed 1.8-V output, DCS-Control™ topology, 3–17-V input range, 500-mA continuous output current, and 2.25-MHz switching frequency. It delivers regulated power to ADAS camera modules and infotainment systems requiring high efficiency across light-to-heavy loads.
For engineers reviewing the TPS62171QDSGRQ1 datasheet, TPS62171QDSGRQ1 pinout, TPS62171QDSGRQ1 application, or TPS62171QDSGRQ1 equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification (–40°C to 125°C), integrated power-good signal, seamless PWM-to-Power-Save mode transition, and WSON-8 package thermal performance.
Technical Context
The TPS62171QDSGRQ1 implements DCS-Control™-a hybrid regulation architecture combining voltage-mode feedback with direct output-voltage sensing for fast transient response and stable operation with low-ESR ceramic capacitors. Its internal 0.8-V reference and fixed 1.8-V output eliminate external feedback resistors while maintaining ±3% DC accuracy in PWM mode.
It supports functional safety design with documented failure modes, includes undervoltage lockout (2.7-V threshold with 180-mV hysteresis), thermal shutdown at 160°C, and open-drain power-good signaling with 92–98% rising threshold. The device operates in 100% duty-cycle mode when VIN approaches VOUT, enabling extended battery runtime in automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports Li-ion batteries and 12-V automotive rails without pre-regulation |
| Output Voltage | Fixed 1.8 V - eliminates external feedback divider, reduces BOM count and layout area |
| Max Output Current | 500 mA - sufficient for powering image sensors, microcontrollers, and interface ICs in ADAS |
| Switching Frequency | Typ. 2.25 MHz - enables use of 2.2-µH inductors and compact 22-µF ceramic output capacitors |
| Quiescent Current | 17 µA - maintains high light-load efficiency in always-on automotive modules |
| Power-Good Threshold | Rising: 92–98% of 1.8 V - provides reliable rail sequencing signal for downstream logic |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design |
Pinout & Package
TPS62171QDSGRQ1 is housed in a thermally enhanced 2 × 2 mm WSON-8 (DSG) package with exposed thermal pad soldered to AGND for optimal power dissipation and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power ground | Low-impedance return path for high-current switch node; must be connected to thermal pad |
| 2 VIN | Supply input | Accepts 3–17 V; requires local 10-µF ceramic decoupling near pin |
| 3 EN | Enable control | Active-high logic; internal 400-kΩ pulldown prevents floating; supports power-rail sequencing |
| 4 AGND | Analog ground | Reference for FB/VOS/PG; must be star-connected to PGND under thermal pad |
| 5 FB | Feedback input | Internally tied to 1.8-V divider; leave floating or connect to AGND for improved thermal resistance |
| 6 VOS | Voltage sense | Direct connection to output capacitor; improves loop stability and load-transient response |
| 7 SW | Switch node | Connects to inductor; high dv/dt node requiring tight layout and minimal trace length |
| 8 PG | Power-good output | Open-drain signal; requires external pullup to ≤7 V; indicates 1.8-V regulation status |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Enables <10-µs load transient recovery with small 22-µF output capacitance and no external compensation |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C junction operation, HBM ±2 kV, CDM ±500 V - suitable for engine bay and ADAS zones |
| Seamless Power Save Mode | Maintains >85% efficiency at 1-mA load without audible switching noise or output voltage discontinuity |
| 100% duty-cycle operation | Regulates down to VIN = VOUT + (IOUT × RDS(on_HS)) - extends usable battery range in 12-V systems |
| Integrated protection | Includes overcurrent limiting (1.05-A typ), thermal shutdown (160°C), and UVLO (2.7-V threshold) |
Applications
| ADAS Camera Module | Automotive Infotainment SoC Core Rail |
|---|---|
|
Use Scenario: Powers 1.8-V image sensor interface and ISP logic in forward-facing driver-assist cameras. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering clean, sequenced 1.8-V supply with PG confirmation. Use Value: DCS-Control™ ensures sub-50-mV output deviation during rapid LED flash pulses; 2.25-MHz switching avoids AM band interference. |
Use Scenario: Supplies 1.8-V core voltage to application processors in digital instrument clusters and head units. IC Role / Device Role / Timing Role: Fixed-output buck converter providing stable core rail with programmable enable sequencing. Use Value: 17-µA quiescent current minimizes standby drain; 100% duty cycle sustains operation as battery drops to 6 V. |
| Body Control Module MCU Core | Automotive Ethernet PHY Interface |
|
Use Scenario: Regulates 1.8-V supply for 32-bit ARM-based microcontrollers managing door locks, lighting, and HVAC. IC Role / Device Role / Timing Role: Automotive-qualified DC-DC converter with integrated PG for safe MCU boot sequencing. Use Value: AEC-Q100 qualification and thermal shutdown ensure reliability in under-hood temperature cycling. |
Use Scenario: Provides 1.8-V bias to automotive-grade Ethernet PHY transceivers (e.g., Broadcom BCM8981x). IC Role / Device Role / Timing Role: Low-noise, high-PSRR point-of-load regulator supporting 100BASE-T1 signal integrity. Use Value: 2.25-MHz switching places noise spectrum above Ethernet bandwidth; VOS pin improves PSRR by 15 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62170QDSGRQ1 | Adjustable output (0.9–6 V); requires external R1/R2 feedback network; identical pinout and package | Suitable where multiple output voltages are needed on same PCB; adds two resistors and layout complexity | Select when flexibility in output voltage outweighs BOM simplification benefits of fixed 1.8 V |
| TPS62172QDSGRQ1 | Fixed 3.3-V output; same DCS-Control™, thermal specs, and protection features | Used for I/O rails, CAN transceivers, or USB PHYs requiring 3.3 V instead of 1.8 V | Choose only if system requires 3.3 V - not a drop-in replacement for 1.8-V designs |
Compared with TPS62170QDSGRQ1 and TPS62172QDSGRQ1, the TPS62171QDSGRQ1 offers lowest BOM cost and smallest footprint for dedicated 1.8-V loads, eliminating feedback resistors while retaining identical thermal, protection, and transient performance.
Availability
TPS62171QDSGRQ1 is available at Aetrix Electronics and suitable for ADAS camera modules, automotive infotainment systems, and body electronics requiring stable component supply with AEC-Q100 compliance and long-term automotive lifecycle support.
Supply support for TPS62171QDSGRQ1 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 and embedded processing technologies, with leadership in power management ICs for automotive, industrial, and consumer markets.
The TPS6217x-Q1 product line delivers high-density, high-efficiency DC-DC conversion for automotive subsystems demanding AEC-Q100 qualification, functional safety readiness, and robust transient performance in space-constrained environments.
FAQ
What is the output voltage of the TPS62171QDSGRQ1?
The TPS62171QDSGRQ1 has a factory-programmed fixed output voltage of 1.8 V. Unlike the adjustable TPS62170QDSGRQ1, it does not require external feedback resistors. The FB pin is internally connected to the 1.8-V divider and may be left floating or tied to AGND to improve thermal resistance - this configuration is confirmed in the TI datasheet Section 6 and Table 5.
Does the TPS62171QDSGRQ1 support power-rail sequencing?
Yes, the TPS62171QDSGRQ1 supports precise power-rail sequencing via its active-high EN pin and open-drain PG output. EN can be driven by another regulator's PG signal to enforce startup order, while the TPS62171QDSGRQ1's own PG pin provides a timing-accurate indication that the 1.8-V rail has reached 92–98% of nominal before enabling downstream circuitry.
What package type and thermal characteristics does the TPS62171QDSGRQ1 use?
The TPS62171QDSGRQ1 uses the 2 × 2 mm WSON-8 (DSG) package with an exposed thermal pad. Its junction-to-board thermal resistance (RθJB) is 35.5°C/W, and junction-to-ambient (RθJA) is 65.5°C/W - values measured per JEDEC JESD51 standards and specified in Section 7.4 of the official datasheet.
How does the TPS62171QDSGRQ1 handle light-load efficiency?
The TPS62171QDSGRQ1 uses DCS-Control™ to seamlessly transition into Power Save Mode below ~10 mA load, reducing switching frequency linearly with load current. This maintains >85% efficiency at 1-mA output while drawing only 17 µA quiescent current from VIN - a key advantage for always-on automotive modules.
Is the TPS62171QDSGRQ1 qualified for automotive safety-critical systems?
Yes, the TPS62171QDSGRQ1 is AEC-Q100 Grade 1 qualified (–40°C to 125°C TJ), includes functional safety documentation (FIT rate, failure modes, diagnostic coverage), and supports ISO 26262 ASIL-B system-level development - as stated in Section 1 (Features) and Section 12.1 of the TI SLVSCK7E datasheet.
TPS62171QDSGRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- DCS-Control™
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
TPS62171QDSGRQ1 FAQ
1.How can I place an order for TPS62171QDSGRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62171QDSGRQ1 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 TPS62171QDSGRQ1 reliable?
The price and inventory of TPS62171QDSGRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62171QDSGRQ1 is usually 5 days.
3.What payment methods are accepted for TPS62171QDSGRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62171QDSGRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62171QDSGRQ1?
TPS62171QDSGRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62171QDSGRQ1 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 TPS62171QDSGRQ1?
For technical support, including TPS62171QDSGRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62171QDSGRQ1 requirements.
6.How does Aetrix verify that TPS62171QDSGRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS62171QDSGRQ1 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 TPS62171QDSGRQ1 meets industry standards.
7.What is the process for return or replacement of TPS62171QDSGRQ1?
All TPS62171QDSGRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62171QDSGRQ1, 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 TPS62171QDSGRQ1 part is unused and in its original packaging.
Return procedure for TPS62171QDSGRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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