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Texas Instruments TPS62172DSGR
- Part No.:
- TPS62172DSGR
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62172DSGR.pdf
- Description:
- IC REG BUCK 3.3V 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:10,835
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Product details
Overview
TPS62172DSGR from Texas Instruments is a fixed-output 5.0 V, 500-mA synchronous step-down DC-DC converter with DCS-Control™ topology, operating from 3 V to 17 V input and delivering ±3% initial output voltage accuracy in a 2-mm × 2-mm 8-pin WSON package. It integrates power good (PG), undervoltage lockout, thermal shutdown, and seamless PWM-to-power-save mode transition for battery-powered embedded systems.
For engineers reviewing the TPS62172DSGR datasheet, TPS62172DSGR pinout, TPS62172DSGR application, or TPS62172DSGR equivalent, key selection criteria include its 2.25-MHz switching frequency, 17-µA quiescent current in power save mode, 5.0-V fixed output, 8-pin WSON thermal pad layout, and compatibility with low-ESR ceramic capacitors and 2.2-µH inductors.
Technical Context
The TPS62172DSGR implements DCS-Control™-a hybrid regulation architecture combining fast AC response via direct output voltage sensing with stable DC regulation through an internal error amplifier and compensated loop. This enables sub-10-µs load transient recovery while maintaining <0.05%/A load regulation and <0.02%/V line regulation across its 3–17 V input range.
Its functional block includes integrated high-side (300–600 mΩ) and low-side (120–200 mΩ) MOSFETs, a 0.8-V internal reference, open-drain PG output with 92–98% rising threshold, and 100% duty-cycle operation below VIN ≈ 1.15×VOUT-enabling extended Li-ion battery runtime down to ~5.75 V input at 5.0 V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports single/dual Li-ion batteries and standard 12-V intermediate rails without external pre-regulation. |
| Output Voltage | Fixed 5.0 V ±3% - eliminates external feedback resistors; reduces BOM count and layout area. |
| Max Output Current | 500 mA continuous - sufficient for microcontrollers, sensors, and interface ICs in space-constrained portable designs. |
| Switching Frequency | Typ. 2.25 MHz - enables use of 2.2-µH inductors and 22-µF output capacitance for compact, low-profile power stages. |
| Quiescent Current | 17 µA (typ.) in power save mode - extends battery life in always-on, low-duty-cycle applications like IoT endpoints. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-off behavior. |
| Power Good Output | Open-drain PG with 92–98% VOUT rising threshold - enables reliable power sequencing with external pull-up to any ≤7-V rail. |
Pinout & Package
TPS62172DSGR is housed in a thermally enhanced 2-mm × 2-mm 8-pin WSON package (DSG) with exposed thermal pad soldered to AGND for optimal junction-to-board thermal resistance (15.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power ground return | Low-impedance path for high-frequency switch node current; must be connected directly to input capacitor ground plane. |
| VIN (Pin 2) | Main input supply | Accepts 3–17 V; requires local 10-µF ceramic capacitor placed within 3 mm of pin for EMI suppression. |
| EN (Pin 3) | Enable control input | Active-high logic; internal 400-kΩ pull-down ensures safe default-off state; supports rail sequencing when driven by upstream regulator. |
| AGND (Pin 4) | Analog ground reference | Separate from PGND to minimize noise coupling into feedback and control circuitry; tied to thermal pad. |
| FB (Pin 5) | Feedback input | Internally connected to GND for fixed 5.0-V operation; floating or AGND-connected to improve thermal performance. |
| VOS (Pin 6) | Voltage sense input | Direct connection to output rail for precise DCS-Control™ loop response; decoupled with 100-nF capacitor to AGND. |
| SW (Pin 7) | Switch node output | Drives external 2.2-µH inductor; requires short, wide trace to minimize ringing and EMI; no external components allowed. |
| PG (Pin 8) | Power good indicator | Open-drain output requiring external pull-up; sinks 2 mA max; high-impedance during shutdown/UVLO/thermal fault. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast transient response (<10 µs) with stable DC regulation using internal compensation-no external type-II/III network required. |
| Seamless power save mode | Automatic transition from 2.25-MHz PWM to variable-frequency PSM at light loads-maintains >85% efficiency down to 100-µA output current. |
| 100% duty cycle operation | Enables regulation down to VIN ≈ 5.75 V at 5.0 V output-maximizes usable battery capacity in single-cell Li-ion systems. |
| Integrated protection | Includes overcurrent limiting (1.05-A typ.), thermal shutdown (160°C), UVLO (2.7 V with 180-mV hysteresis), and soft-start (25 mV/µs ramp)-reduces need for external supervision ICs. |
| Thermally optimized WSON | Exposed thermal pad soldered to AGND achieves 15.5°C/W RθJB-supports 500-mA operation at +85°C ambient without forced air. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data every 5 seconds via BLE. IC Role / Device Role / Timing Role: Primary 5.0-V POL regulator supplying MCU, RF transceiver, and analog front-end. Use Value: 17-µA quiescent current extends 2×AA battery life beyond 2 years; 2.25-MHz switching avoids interference with 2.4-GHz BLE band. | Use Scenario: Handheld ECG device with OLED display, analog signal chain, and USB charging. IC Role / Device Role / Timing Role: Main 5.0-V rail generator from single Li-ion cell (3.0–4.2 V) with power sequencing control. Use Value: 100% duty cycle operation sustains regulation until battery drops to 5.75 V; PG output triggers MCU wake-up only after stable 5.0 V is established. |
| Smart Home Hub Controller | Automotive Body Control Module |
Use Scenario: Always-on Wi-Fi/Zigbee hub managing dozens of end devices in residential settings. IC Role / Device Role / Timing Role: Secondary 5.0-V supply derived from 12-V automotive or PoE-derived rail. Use Value: 3–17 V input range accepts 12-V nominal with ±10% tolerance and cold-crank dips; PG signal coordinates firmware initialization sequence. | Use Scenario: Low-power door module with CAN transceiver, LED drivers, and wake-on-LIN capability. IC Role / Device Role / Timing Role: 5.0-V rail for microcontroller and LIN physical layer, powered from vehicle battery (9–16 V). Use Value: Undervoltage lockout at 2.7 V prevents erratic MCU behavior during cranking; thermal shutdown protects against enclosure overheating in sealed housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62171DSGR | Fixed 3.3-V output; identical pinout, package, and electrical specs except VOUT and FB configuration. | Used where system logic requires 3.3 V instead of 5.0 V; same layout reuse possible with output capacitor and VOS routing unchanged. | Select TPS62171DSGR only when 3.3-V rail is required; no change to inductor or input/output caps needed. |
| TPS62160DRVR | 3–17 V input, adjustable 0.8–6 V output; 2-MHz switching; 11-µA IQ; same 8-pin WSON but different pin mapping (no PG, different EN/AGND locations). | Requires PCB redesign due to non-pin-compatible layout; suited for designs needing programmable output or lower quiescent current. | Choose TPS62160DRVR only if adjustable output or sub-17-µA IQ is mandatory; not a drop-in replacement. |
Compared with TPS62172DSGR, TPS62171DSGR offers identical form-factor and thermal performance at 3.3 V, while TPS62160DRVR trades PG functionality and pin compatibility for wider output adjustability and marginally lower IQ-making it suitable only for new designs with layout flexibility.
Availability
TPS62172DSGR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart home hubs, automotive body control modules, and battery-powered embedded systems requiring stable component supply, long-lifecycle support, and consistent parametric performance.
Supply support for TPS62172DSGR 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 technologies, with decades of expertise in high-efficiency DC-DC conversion and automotive-grade reliability.
The TPS6217x product line was designed specifically for high-power-density, battery-sensitive applications-including portable instrumentation, wearables, and automotive subsystems-where small solution size, ultra-low IQ, and seamless light-load efficiency are critical.
FAQ
What is the fixed output voltage of the TPS62172DSGR?
The TPS62172DSGR delivers a factory-programmed fixed output voltage of 5.0 V with ±3% initial accuracy over temperature and line/load conditions. Unlike the adjustable TPS62170, it does not require external feedback resistors-FB is internally connected to AGND, and connecting it externally is optional for thermal enhancement only.
Does the TPS62172DSGR support 100% duty cycle operation, and what is its minimum input voltage for regulation?
Yes, the TPS62172DSGR supports 100% duty cycle operation to maintain regulation as input voltage approaches output voltage. At 500-mA load and typical RDS(on), it sustains 5.0-V output down to approximately 5.75 V input-enabling maximum energy extraction from single Li-ion cells before cutoff.
How does the power good (PG) pin function on the TPS62172DSGR?
The PG pin on the TPS62172DSGR is an open-drain output that goes high-impedance when disabled (EN low), during UVLO, or thermal shutdown, and pulls low when VOUT falls below 90% of nominal. With an external pull-up, it asserts high when VOUT reaches 92–98% of 5.0 V-providing clean power sequencing for downstream MCUs or FPGAs.
What inductor and output capacitor values are recommended for the TPS62172DSGR?
Texas Instruments recommends a 2.2-µH shielded power inductor and 22-µF low-ESR ceramic output capacitor for the TPS62172DSGR. The 2.25-MHz switching frequency allows these small values to meet ripple, transient, and stability requirements-verified in TI's SLVSAT8E datasheet Figure 12 and Table 9.2.2.2.
Is the TPS62172DSGR pin-compatible with other devices in the TPS6217x family?
Yes, all TPS6217x variants-including TPS62170, TPS62171, TPS62172, and TPS62173-are pin-compatible in the 8-pin WSON (DSG) package. They share identical pinout, thermal pad, and footprint; only the fixed output voltage differs (1.8 V, 3.3 V, 5.0 V, 5.0 V respectively), and FB handling varies between adjustable and fixed versions.
TPS62172DSGR 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
TPS62172DSGR FAQ
1.How can I place an order for TPS62172DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62172DSGR 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 TPS62172DSGR reliable?
The price and inventory of TPS62172DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62172DSGR is usually 5 days.
3.What payment methods are accepted for TPS62172DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62172DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62172DSGR?
TPS62172DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62172DSGR 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 TPS62172DSGR?
For technical support, including TPS62172DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62172DSGR requirements.
6.How does Aetrix verify that TPS62172DSGR is sourced from the original manufacturer or authorized distributors?
All TPS62172DSGR 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 TPS62172DSGR meets industry standards.
7.What is the process for return or replacement of TPS62172DSGR?
All TPS62172DSGR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62172DSGR, 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 TPS62172DSGR part is unused and in its original packaging.
Return procedure for TPS62172DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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