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Texas Instruments TPS62173DSGT
- Part No.:
- TPS62173DSGT
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62173DSGT.pdf
- Description:
- IC REG BUCK 5V 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,715
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Product details
Overview
TPS62173DSGT from Texas Instruments is a fixed-output 1.8 V, 500-mA synchronous step-down DC-DC converter with DCS-Control™ topology, operating from 3 V to 17 V input and delivering ±3% output voltage accuracy in a 2-mm × 2-mm WSON-8 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 TPS62173DSGT datasheet, TPS62173DSGT pinout, TPS62173DSGT application, or TPS62173DSGT equivalent, key selection criteria include its 1.8 V fixed output, 2.25 MHz switching frequency, 17 µA quiescent current, 100% duty-cycle capability, and open-drain PG signal for rail sequencing in space-constrained portable electronics.
Technical Context
The TPS62173DSGT implements DCS-Control™ - a hybrid regulation architecture combining fast comparator-based AC loop response with a compensated DC feedback loop - enabling stable operation with low-ESR ceramic capacitors and achieving <1% load transient deviation at 500 mA step changes. Its internal 800-mV reference and fixed resistor divider eliminate external FB components.
It operates in continuous conduction mode (CCM) above light-load thresholds and transitions seamlessly into power save mode below them, maintaining >85% efficiency down to 10 µA load while holding 1.8 V output within ±3.5% across temperature and line variations. The 100% duty-cycle mode sustains regulation as VIN approaches VOUT + IOUT×(RDS(on) + RL).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±3% - eliminates external feedback resistors and reduces BOM count. |
| Max Output Current | 500 mA continuous - supports single-core microcontrollers, FPGAs, and sensor interfaces without derating at 85°C. |
| Input Voltage Range | 3 V to 17 V - compatible with 12-V rails, dual-cell Li-ion (6–8.4 V), and wide-input industrial supplies. |
| Switching Frequency | Typ. 2.25 MHz - enables use of 2.2 µH inductors and 22 µF output capacitance for compact 12 mm² solution size. |
| Quiescent Current | 17 µA typical - extends battery runtime in always-on monitoring nodes and IoT endpoints. |
| Power Good Output | Open-drain PG with 92–98% rising threshold - provides reliable system reset and multi-rail sequencing control. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents latch-up during sustained overload or poor PCB thermal design. |
Pinout & Package
TPS62173DSGT is housed in an 8-pin WSON package (DSG) measuring 2.00 mm × 2.00 mm with exposed thermal pad soldered to AGND for enhanced thermal dissipation (RθJB = 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 precise power sequencing. |
| AGND (Pin 4) | Analog ground reference | Separate ground for feedback and control circuitry; tied to exposed thermal pad for optimal noise immunity. |
| FB (Pin 5) | Feedback input | Internally connected to fixed divider for 1.8 V output; recommended to connect to AGND for improved thermal resistance. |
| VOS (Pin 6) | Voltage sense input | Direct connection to output rail for accurate regulation; enables remote sensing in noisy layouts. |
| SW (Pin 7) | Switch node | Drives external 2.2 µH inductor; requires tight layout with minimal loop area to reduce EMI and switching losses. |
| PG (Pin 8) | Power good indicator | Open-drain output requiring external pull-up; sinks 2 mA at logic low; high-impedance during shutdown/UVLO. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast transient response (<10 µs recovery from 500 mA load step) with stable DC regulation using only ceramic output caps. |
| 100% duty-cycle mode | Maintains 1.8 V regulation down to VIN ≈ 1.85 V at full load - maximizes battery utilization in single-cell Li-ion applications. |
| Seamless power save mode | Automatically transitions between PWM and PSM without output voltage glitch or audible noise - critical for audio-sensitive designs. |
| Integrated protection | Includes overcurrent limiting (1.05 A typ), thermal shutdown (160°C), and undervoltage lockout (2.7 V with 180 mV hysteresis). |
| Small solution footprint | 2-mm × 2-mm WSON-8 package with 2.2 µH inductor and 22 µF output cap achieves <12 mm² total board area. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered wireless temperature/humidity sensor transmitting data every 30 seconds via BLE. IC Role / Device Role / Timing Role: Primary POL regulator converting 3.6 V Li-ion to stable 1.8 V for MCU, RF transceiver, and analog front-end. Use Value: 17 µA quiescent current extends 2000 mAh battery life beyond 2 years; 2.25 MHz switching avoids interference with 2.4 GHz BLE band. | Use Scenario: Handheld ECG device with real-time signal processing and OLED display. IC Role / Device Role / Timing Role: Supplies clean 1.8 V to low-power ARM Cortex-M4 core and ADC reference buffer. Use Value: ±3% output accuracy ensures consistent ADC reference stability; PG signal synchronizes display backlight enable after rail stabilization. |
| Smart Home Hub Controller | Embedded Vision Module |
Use Scenario: Multi-protocol gateway (Zigbee + Thread + Matter) running Linux on SoC with multiple voltage domains. IC Role / Device Role / Timing Role: Secondary 1.8 V rail for SoC I/O and memory interface, sequenced after main 3.3 V supply. Use Value: Open-drain PG output enables hardware-controlled startup order; 100% duty-cycle mode maintains regulation during brownout events. | Use Scenario: Compact AI inference module using vision processor with DDR3L memory. IC Role / Device Role / Timing Role: Provides tightly regulated 1.8 V to DDR3L termination and I/O banks. Use Value: Low output ripple (<10 mVpp) prevents timing jitter in high-speed memory interfaces; DCS-Control™ ensures sub-50 ns transient response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62171DSGT | Fixed 3.3 V output; identical package, pinout, and DCS-Control™ features. | Used where higher logic voltage is required for interface compatibility (e.g., USB PHY, SDIO). | Select when system requires 3.3 V instead of 1.8 V; no layout change needed. |
| TPS62160DSGR | Adjustable output (0.6–6 V); same 2.25 MHz frequency but lacks PG and 100% duty-cycle mode. | Suitable for designs needing flexible voltage scaling or dynamic VDD control. | Choose if adjustable output or lower cost is prioritized over rail sequencing and ultra-low-VIN operation. |
Compared with TPS62173DSGT, TPS62171DSGT offers identical performance at 3.3 V for interface rails, while TPS62160DSGR trades PG and 100% duty-cycle capability for output flexibility - making TPS62173DSGT optimal for fixed 1.8 V, battery-critical, and sequenced systems.
Availability
TPS62173DSGT is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart home hubs, embedded vision modules, and battery-powered IoT edge devices requiring stable component supply and long-term manufacturability.
Supply support for TPS62173DSGT 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 industrial, automotive, and consumer markets.
The TPS6217x family was designed for high-density, battery-sensitive applications demanding small footprint, low quiescent current, and robust transient performance - particularly in portable and always-on electronics.
FAQ
What is the output voltage tolerance of the TPS62173DSGT under full load and temperature range?
The TPS62173DSGT delivers 1.8 V output with ±3% initial accuracy in PWM mode and ±3.5% in power save mode across –40°C to +125°C junction temperature. This includes line, load, and temperature effects - verified per TI's SLVSAT8E datasheet Section 7.5 - ensuring reliable operation for precision analog and digital loads without external trimming.
Does the TPS62173DSGT require external feedback resistors to set its output voltage?
No. The TPS62173DSGT is a fixed-output variant with internal resistor divider configured for 1.8 V. Pin 5 (FB) is internally connected and should be tied to AGND per TI recommendation to improve thermal resistance - eliminating external resistors and reducing solution size and BOM cost.
Can the TPS62173DSGT operate with input voltage as low as 2.0 V?
No. The TPS62173DSGT has an undervoltage lockout threshold of 2.7 V (typical) with 180 mV hysteresis. Operation below 2.6 V causes shutdown; minimum functional input is 3.0 V per Recommended Operating Conditions. For sub-3 V inputs, consider TPS62160 or TPS6274x families.
How does the power good (PG) signal behave during thermal shutdown of the TPS62173DSGT?
During thermal shutdown, the TPS62173DSGT drives PG to high-impedance state - identical to shutdown or UVLO conditions - as specified in Table 1 of the datasheet. This allows external logic to detect fault conditions independently of EN status and initiate system-level thermal mitigation protocols.
What inductor value is recommended for optimal performance with the TPS62173DSGT?
Texas Instruments recommends a 2.2 µH shielded power inductor (e.g., Coilcraft XAL5030-222MEB) for the TPS62173DSGT. This value balances peak current limit margin, efficiency (>90% at 500 mA), and transient response while fitting within the 2.25 MHz switching frequency constraints defined in the datasheet's Typical Application schematic.
TPS62173DSGT 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):
- 5V
- 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)
TPS62173DSGT FAQ
1.How can I place an order for TPS62173DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62173DSGT 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 TPS62173DSGT reliable?
The price and inventory of TPS62173DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62173DSGT is usually 5 days.
3.What payment methods are accepted for TPS62173DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62173DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62173DSGT?
TPS62173DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62173DSGT 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 TPS62173DSGT?
For technical support, including TPS62173DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62173DSGT requirements.
6.How does Aetrix verify that TPS62173DSGT is sourced from the original manufacturer or authorized distributors?
All TPS62173DSGT 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 TPS62173DSGT meets industry standards.
7.What is the process for return or replacement of TPS62173DSGT?
All TPS62173DSGT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62173DSGT, 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 TPS62173DSGT part is unused and in its original packaging.
Return procedure for TPS62173DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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