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Texas Instruments TPS62173DSGR
- Part No.:
- TPS62173DSGR
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62173DSGR.pdf
- Description:
- IC REG BUCK 5V 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,261
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Product details
Overview
TPS62173DSGR 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 high efficiency at light loads via seamless power save mode transition. It features an open-drain power good (PG) output, 100% duty cycle capability for battery-end-of-life operation, and thermal/short-circuit protection - deployed in portable Li-ion-powered devices requiring compact, reliable POL regulation.
For engineers reviewing the TPS62173DSGR datasheet, TPS62173DSGR pinout, TPS62173DSGR application, or TPS62173DSGR equivalent, key selection criteria include its 2.25-MHz switching frequency enabling 2.2-µH inductor use, 17-µA quiescent current in power save mode, fixed 1.8-V output accuracy (±3%), and WSON-8 package compatibility with space-constrained embedded systems.
Technical Context
The TPS62173DSGR implements DCS-Control™ - a hybrid regulation architecture combining fast AC voltage feedback (via direct comparator sensing of VOS) with stable DC error amplification - enabling 2.25-MHz nominal switching, sub-100-ns transient response, and <0.5% output voltage ripple. Its internal 800-mV reference and fixed resistive divider set 1.8 V output without external FB components.
Functional modes include PWM (CCM) above ~250 mA, seamless transition into power save mode (DCM) at lighter loads, 100% duty cycle operation below VIN ≈ 2.1 V, and thermal shutdown at 160°C with 20°C hysteresis. EN pin enables rail sequencing; PG provides open-drain status signaling with 92–98% rising threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 17 V - supports single/multi-cell Li-ion batteries and 12-V intermediate rails without external pre-regulation. |
| Output Voltage | Fixed 1.8 V ±3% - eliminates external feedback resistors; optimized for low-voltage logic and memory interfaces. |
| Max Output Current | 500 mA continuous - sufficient for microcontrollers, FPGAs, and sensor hubs in portable applications. |
| Switching Frequency | Typ. 2.25 MHz - enables use of 2.2-µH inductors and 22-µF ceramic output capacitors for ultra-compact designs. |
| Quiescent Current | 17 µA (typ.) in power save mode - extends battery runtime in always-on or low-duty-cycle IoT endpoints. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-off. |
| Power Good Threshold | Rising: 92–98% of 1.8 V - ensures reliable system reset and power sequencing in multi-rail architectures. |
Pinout & Package
TPS62173DSGR is housed in a thermally enhanced 2-mm × 2-mm 8-pin WSON package (DSG) with exposed thermal pad soldered to AGND for optimal power dissipation and EMI control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND | Power ground return | Low-impedance path for high-frequency switch node current; must be connected directly to input capacitor ground. |
| VIN | Main supply input | Accepts 3–17 V; requires local 10-µF ceramic decoupling close to pin for stability and EMI suppression. |
| EN | Enable control input | Active-high logic; internal 400-kΩ pull-down allows safe default-off behavior; supports precise power sequencing. |
| AGND | Analog ground reference | Reference for FB/VOS/PG circuits; must be tied to PGND at single point near IC to minimize noise coupling. |
| VOS | Output voltage sense | Direct connection to regulated output; enables accurate DCS-Control™ loop response independent of PCB trace resistance. |
| SW | Switch node | Connects to 2.2-µH inductor; carries high dv/dt switching waveform - requires tight layout and minimal loop area. |
| PG | Open-drain power good | Sinks up to 2 mA; requires external pull-up to ≤7 V; signals valid regulation after soft-start completion. |
| Exposed Thermal Pad | Thermal & mechanical anchor | Mandatory solder connection to AGND plane; critical for thermal resistance (RθJB = 15.5°C/W) and reliability. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast AC voltage sensing (VOS) with DC error amplification to achieve <10-µs load transient recovery and ±0.5% output ripple under dynamic loads. |
| Seamless power save mode | Automatic transition from PWM to PSM without output voltage glitch or audible noise - maintains >85% efficiency down to 10 µA load. |
| 100% duty cycle operation | Enables regulation down to VIN ≈ 1.8 V + IOUT×(RDS(on) + RL) - extends usable battery life in single-cell Li-ion systems beyond typical buck cutoff. |
| Integrated protection | Includes undervoltage lockout (2.7 V ±0.12 V), thermal shutdown (160°C), and cycle-by-cycle current limiting (1.05 A typ.) - eliminates need for external fault management circuitry. |
| Small solution size | 2.2-µH inductor + 22-µF output capacitor + 10-µF input capacitor fits within 12 mm² footprint - ideal for wearables and compact modules. |
Applications
| Mobile PC Core Logic Supply | Digital Still Camera Sensor Bias |
|---|---|
Use Scenario: Powers ARM-based application processors and LPDDR memory in sub-12-inch tablets requiring stable 1.8-V core voltage during burst-mode video capture. IC Role / Device Role / Timing Role: Primary POL regulator delivering 500 mA with <10-µs transient response to handle CPU DVFS transitions and memory refresh cycles. Use Value: DCS-Control™ ensures <15-mV output deviation during 100-mA/µs load steps, preventing processor lockup or frame corruption. | Use Scenario: Supplies image sensor analog front-end and timing controller in DSLR cameras where EMI-sensitive pixel readout demands ultra-low ripple. IC Role / Device Role / Timing Role: Low-noise 1.8-V bias source with 2.25-MHz switching synchronized to sensor clock to avoid beat frequencies in raw image data. Use Value: 0.5% peak-to-peak output ripple and <5-mV load-step deviation preserve SNR in 16-bit ADC conversion paths. |
| Industrial IoT Edge Node MCU | Medical Wearable Sensor Hub |
Use Scenario: Regulates power for Cortex-M4 microcontroller, BLE radio, and environmental sensors in battery-operated predictive maintenance nodes deployed in factory settings. IC Role / Device Role / Timing Role: Always-on POL converter maintaining 1.8-V rail during 10-s sleep intervals and 100-ms active bursts, managed via EN pin wake-up. Use Value: 17-µA quiescent current extends 2000-mAh Li-ion battery life to >2 years in typical 1% duty-cycle deployments. | Use Scenario: Powers optical heart-rate monitor ASIC and flash memory in FDA-cleared wrist-worn vital sign monitors requiring long-term reliability and low thermal signature. IC Role / Device Role / Timing Role: Safety-critical power stage with thermal shutdown and PG monitoring integrated into host MCU's health-check routine. Use Value: Exposed thermal pad and RθJB = 15.5°C/W ensure junction temperature stays <85°C at 45°C ambient - meeting Class II medical thermal limits. |
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 3.3-V I/O or interface logic requires separate regulation from 1.8-V core rails. | Select when system requires dual-output POL with shared layout and BOM simplification. |
| TPS62160DRVR | 3-V to 17-V input, adjustable 0.8–6-V output; same 2.25-MHz DCS-Control™ but no PG pin and different enable threshold. | Preferred for designs needing programmable output or omitting power sequencing, accepting slightly higher quiescent current (25 µA). | Choose if flexibility in output voltage outweighs need for PG monitoring and lowest IQ. |
Compared with TPS62173DSGR, TPS62171DSGR offers identical form-factor and protection features but targets 3.3-V loads, while TPS62160DRVR trades PG functionality and 17-µA IQ for output adjustability - making TPS62173DSGR optimal for fixed 1.8-V applications demanding sequencing and ultra-low standby power.
Availability
TPS62173DSGR is available at Aetrix Electronics and suitable for mobile PCs, digital still cameras, industrial IoT edge nodes, medical wearable sensor hubs, and embedded systems requiring stable component supply across production lifecycles.
Supply support for TPS62173DSGR 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 over 90 years of innovation in high-reliability electronic components.
The TPS6217x product line delivers high-efficiency, small-footprint DC-DC converters for battery-powered and space-constrained applications - designed specifically for portable computing, imaging, and industrial edge devices requiring robust POL regulation.
FAQ
What is the exact output voltage tolerance of the TPS62173DSGR under full load and temperature range?
The TPS62173DSGR delivers a fixed 1.8-V output with initial accuracy of ±3% over the full junction temperature range (–40°C to +125°C) and line/load conditions per TI SLVSAT8E datasheet Section 7.5. This includes effects of input voltage variation (3–17 V), output current (0–500 mA), and temperature - verified by production testing, not typical-only specification.
Does the TPS62173DSGR require external feedback resistors to set its output voltage?
No, the TPS62173DSGR does not require external feedback resistors. As a fixed-output variant in the TPS6217x family, it integrates an internal resistive divider to regulate precisely to 1.8 V. The FB pin is internally connected and may be left floating or tied to AGND for improved thermal performance - unlike the adjustable TPS62170 which requires external R1/R2.
Can the TPS62173DSGR operate with input voltage below 3 V, such as at end-of-life for a single Li-ion cell?
Yes, the TPS62173DSGR supports 100% duty cycle operation down to input voltages as low as approximately 1.8 V + IOUT×(RDS(on) + RL). While its recommended minimum input is 3 V, it maintains regulation in dropout until VIN approaches the output voltage plus conduction losses - extending usable battery life beyond standard buck cutoff points.
What is the maximum achievable switching frequency variation for the TPS62173DSGR across operating conditions?
The TPS62173DSGR operates at a nominal 2.25 MHz, with frequency variation controlled by input voltage, output voltage, and inductor value. Per datasheet Figure 12 and Section 8.4.2, frequency remains within ±15% of nominal (i.e., 1.91–2.59 MHz) across 3–17 V input, 1.8 V output, and 2.2-µH inductor - ensuring predictable EMI filtering and consistent transient response.
How is thermal performance validated for the TPS62173DSGR in a standard 2-layer PCB layout?
Texas Instruments characterizes the TPS62173DSGR using JEDEC JESD51-7 standard test board: 2-layer FR-4 with 2-oz copper, 1-in² exposed thermal pad connected to inner ground plane. Measured RθJA is 61.8°C/W and RθJB is 15.5°C/W - meaning at 500 mA and 12 V input, junction temperature rise is ~25°C above ambient, well within the 125°C max operating limit.
TPS62173DSGR 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)
TPS62173DSGR FAQ
1.How can I place an order for TPS62173DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62173DSGR 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 TPS62173DSGR reliable?
The price and inventory of TPS62173DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62173DSGR is usually 5 days.
3.What payment methods are accepted for TPS62173DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62173DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62173DSGR?
TPS62173DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62173DSGR 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 TPS62173DSGR?
For technical support, including TPS62173DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62173DSGR requirements.
6.How does Aetrix verify that TPS62173DSGR is sourced from the original manufacturer or authorized distributors?
All TPS62173DSGR 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 TPS62173DSGR meets industry standards.
7.What is the process for return or replacement of TPS62173DSGR?
All TPS62173DSGR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62173DSGR, 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 TPS62173DSGR part is unused and in its original packaging.
Return procedure for TPS62173DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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