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Texas Instruments TPS62170QDSGTQ1
- Part No.:
- TPS62170QDSGTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62170QDSGTQ1.pdf
- Description:
- IC REG BUCK ADJ 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:174
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Product details
Overview
TPS62170QDSGTQ1 from Texas Instruments is an automotive-grade synchronous step-down DC-DC converter with DCS-Control™ topology, delivering up to 500 mA output current across 0.9 V–6 V adjustable output voltage range, operating from 3 V–17 V input, and featuring power-good (PG), 100% duty-cycle mode, and thermal/short-circuit protection - used in ADAS camera power rails.
For engineers reviewing the TPS62170QDSGTQ1 datasheet, TPS62170QDSGTQ1 pinout, TPS62170QDSGTQ1 application, or TPS62170QDSGTQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to 125°C), 2.25 MHz switching frequency for compact 2.2 µH inductor use, seamless PWM-to-Power-Save transition, and WSON-8 package compatibility with space-constrained automotive PCBs.
Technical Context
The TPS62170QDSGTQ1 implements DCS-Control™ - a hybrid regulation architecture combining fast comparator-based AC loop response with voltage feedback for stable DC regulation - enabling immediate transient response while maintaining <±3% output accuracy in PWM mode and <±3.5% in Power Save Mode. Its internal 0.8 V reference and resistive FB divider support precise output programming.
It operates in three functional modes: continuous-conduction PWM (2.25 MHz nominal), discontinuous-conduction Power Save Mode (frequency scales linearly with load), and 100% duty-cycle mode for ultra-low VIN–VOUT differentials. Control logic integrates undervoltage lockout (2.7 V threshold, 180 mV hysteresis), thermal shutdown (160°C, 20°C hysteresis), and open-drain PG signaling with external pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports Li-ion battery packs and 12-V automotive rails without pre-regulation. |
| Output Current | Up to 500 mA continuous - sufficient for powering image sensors, microcontrollers, and interface ICs in ADAS modules. |
| Output Voltage Range | Adjustable 0.9 V to 6 V via FB pin - enables single BOM reuse across multiple voltage rails (e.g., 1.8 V core, 3.3 V I/O). |
| Switching Frequency | Typically 2.25 MHz - allows use of small 2.2 µH inductors and reduces output capacitor size (e.g., 10 µF + 22 µF ceramic). |
| Quiescent Current | 17 µA typical in Power Save Mode - extends battery runtime in always-on vehicle subsystems. |
| Thermal Protection | 160°C junction shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Power-Good Output | Open-drain PG with 92–98% rising threshold - enables safe sequencing of downstream FPGAs or processors before system boot. |
Pinout & Package
TPS62170QDSGTQ1 is housed in a thermally enhanced 2 mm × 2 mm, 8-pin WSON (DSG) package with exposed thermal pad soldered to AGND for optimal power dissipation and reliability in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power ground return | Low-impedance path for high-current switch node return; must be connected to local power plane under IC. |
| VIN (Pin 2) | Main input supply | Accepts 3–17 V; requires local 10 µF ceramic decoupling close to pin for EMI suppression and transient response. |
| EN (Pin 3) | Enable control input | Active-high logic; internal 400 kΩ pulldown ensures safe default-off state if left floating. |
| AGND (Pin 4) | Analog ground reference | Reference for FB, VOS, and internal error amplifier; must be tied to PGND at single point near thermal pad. |
| FB (Pin 5) | Feedback voltage sense | Regulated to 0.8 V; connects to resistor divider from VOUT to set output voltage (e.g., R1=470 kΩ, R2=150 kΩ → 3.3 V). |
| VOS (Pin 6) | Output voltage sense | Direct connection to output capacitor; provides accurate sensing for DCS-Control loop compensation. |
| SW (Pin 7) | Switch node | Connects to inductor; carries high di/dt switching current - requires short, wide trace and minimized loop area. |
| PG (Pin 8) | Power-good indicator | Open-drain output requiring external pullup (e.g., to 3.3 V); sinks ≤2 mA when active low, high-Z when disabled. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast comparator-based AC response with voltage-mode DC regulation - achieves <10 µs load transient recovery and ±3% line/load regulation without external compensation. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C junction operation, HBM ±2 kV, CDM ±500 V - meets automotive safety-critical power rail requirements. |
| Seamless Power Save Mode | Automatically transitions from 2.25 MHz PWM to variable-frequency PSM below ~25% load - maintains >85% efficiency down to 1 mA output current. |
| 100% duty-cycle operation | Enables regulation when VIN drops within ~15% of VOUT (e.g., 3.3 V out from 3.8 V battery) - maximizes usable battery capacity in start-stop systems. |
| Integrated protection suite | Includes undervoltage lockout (2.7 V), thermal shutdown (160°C), overcurrent limiting (~1.05 A peak), and short-circuit foldback - eliminates need for external fault management circuitry. |
Applications
| ADAS Camera Module | Powertrain Control Unit |
|---|---|
|
Use Scenario: Powers 5-MP CMOS image sensor and ISP in forward-facing driver assistance camera. IC Role / Device Role / Timing Role: Primary 3.3 V/500 mA POL regulator with PG sequencing signal to enable sensor initialization after stable rail. Use Value: 2.25 MHz switching minimizes EMI near RF-sensitive camera electronics; DCS-Control ensures <50 mV droop during 100 mA–500 mA step loads. |
Use Scenario: Supplies 1.8 V core voltage to automotive MCU in engine control module with cold-cranking survival. IC Role / Device Role / Timing Role: Adjustable buck converter configured for 1.8 V output, enabled only after main 12 V rail stabilizes via EN pin control. Use Value: 100% duty-cycle mode sustains regulation during cranking dips to 6 V input; thermal shutdown protects against under-hood overheating. |
| Body Control Module Lighting | Infotainment Head Unit |
|
Use Scenario: Drives LED backlight and touch controller in smart rearview mirror with dimming capability. IC Role / Device Role / Timing Role: Adjustable 3.0–5.0 V output buck supplying constant-current LED driver IC and capacitive touch ASIC. Use Value: Low 17 µA quiescent current preserves battery during vehicle sleep mode; PG signal disables display backlight until full VOUT stability. |
Use Scenario: Generates 3.3 V I/O rail for audio codec, CAN transceiver, and display interface in center-stack infotainment system. IC Role / Device Role / Timing Role: Secondary POL converter powered from 5 V intermediate rail, sequenced via PG from primary 5 V supply. Use Value: Pin-to-pin compatibility with TPS62160-Q1 allows design reuse; WSON-8 footprint fits tight layout constraints behind display bezel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62171QDSGTQ1 | Fixed 1.8 V output; identical package, pinout, and DCS-Control features. | No external feedback resistors required; simplifies BOM but lacks voltage flexibility. | Select when 1.8 V is fixed system requirement and board space for R1/R2 is constrained. |
| TPS62160QDSGTQ1 | Same WSON-8 package and pinout; lower 3–6 V input range; 1.2 MHz switching frequency. | Requires larger 4.7 µH inductor; less suitable for high-density ADAS designs needing 2.25 MHz operation. | Choose for cost-sensitive non-AEC-Q100 applications where 1.2 MHz and narrower VIN range are acceptable. |
Compared with TPS62170QDSGTQ1, the TPS62171QDSGTQ1 eliminates external feedback components but sacrifices adjustability, while the TPS62160QDSGTQ1 offers lower cost and simpler magnetics at the expense of automotive qualification and high-frequency performance.
Availability
TPS62170QDSGTQ1 is available at Aetrix Electronics and suitable for ADAS camera modules, powertrain control units, and body electronics requiring stable component supply with automotive-grade reliability and long-term production continuity.
Supply support for TPS62170QDSGTQ1 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 communications markets.
The TPS6217x-Q1 product line delivers high-efficiency, high-density DC-DC conversion for automotive subsystems demanding AEC-Q100 compliance, functional safety readiness, and robust transient performance under harsh electrical conditions.
FAQ
What is the minimum input voltage required for TPS62170QDSGTQ1 to maintain regulation at 3.3 V output?
The TPS62170QDSGTQ1 supports 100% duty-cycle operation, allowing regulation down to approximately 3.8 V input (15% above 3.3 V) under light load. Below this, output voltage drops proportionally. For full 500 mA capability at 3.3 V, ≥4.5 V input is recommended per datasheet derating curves and thermal limits.
Does TPS62170QDSGTQ1 require external compensation components?
No, the TPS62170QDSGTQ1 uses internally compensated DCS-Control™ topology and requires no external compensation network. Only standard input/output capacitors (e.g., 10 µF C1, 22 µF C2), inductor (2.2 µH), and FB divider resistors (R1/R2) are needed - simplifying layout and reducing bill-of-materials count.
How does the power-good (PG) signal behave during thermal shutdown of TPS62170QDSGTQ1?
During thermal shutdown, the TPS62170QDSGTQ1 disables both MOSFETs and places the PG pin in high-impedance state - identical to shutdown via EN or UVLO. This signals downstream logic that VOUT is no longer regulated, enabling safe system-level fault handling without false "ready" assertions.
Can TPS62170QDSGTQ1 start up into a pre-biased output voltage?
Yes, the TPS62170QDSGTQ1 supports monotonic pre-biased start-up: the low-side MOSFET remains off until the internal ramp exceeds the pre-bias voltage, preventing reverse current flow and ensuring controlled voltage rise - critical for hot-swap and multi-rail sequencing applications.
What is the maximum allowable junction temperature for continuous operation of TPS62170QDSGTQ1?
The TPS62170QDSGTQ1 is specified for continuous operation up to 125°C junction temperature. While thermal shutdown activates at 160°C, electrical parameters (e.g., efficiency, load regulation, quiescent current) are only guaranteed within the –40°C to +125°C range per AEC-Q100 Grade 1 specification.
TPS62170QDSGTQ1 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 6V
- 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)
TPS62170QDSGTQ1 FAQ
1.How can I place an order for TPS62170QDSGTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62170QDSGTQ1 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 TPS62170QDSGTQ1 reliable?
The price and inventory of TPS62170QDSGTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62170QDSGTQ1 is usually 5 days.
3.What payment methods are accepted for TPS62170QDSGTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62170QDSGTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62170QDSGTQ1?
TPS62170QDSGTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62170QDSGTQ1 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 TPS62170QDSGTQ1?
For technical support, including TPS62170QDSGTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62170QDSGTQ1 requirements.
6.How does Aetrix verify that TPS62170QDSGTQ1 is sourced from the original manufacturer or authorized distributors?
All TPS62170QDSGTQ1 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 TPS62170QDSGTQ1 meets industry standards.
7.What is the process for return or replacement of TPS62170QDSGTQ1?
All TPS62170QDSGTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62170QDSGTQ1, 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 TPS62170QDSGTQ1 part is unused and in its original packaging.
Return procedure for TPS62170QDSGTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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