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Texas Instruments TPS62177DQCT
- Part No.:
- TPS62177DQCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TPS62177DQCT.pdf
- Description:
- IC REG BUCK 3.3V 500MA 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:6,491
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Product details
Overview
TPS62177DQCT from Texas Instruments is a fixed-output 3.3 V, 500-mA synchronous step-down DC/DC converter in a 2-mm × 3-mm WSON-10 package, featuring DCS-Control™ topology, 4.75–28 V input range, and 4.8 µA sleep-mode quiescent current. It delivers high efficiency across load ranges for ultra-low-power microcontroller supply rails in battery-powered industrial sensors and embedded PCs.
For engineers reviewing the TPS62177DQCT datasheet, TPS62177DQCT pinout, TPS62177DQCT application, or TPS62177DQCT equivalent, key selection criteria include its 3.3 V fixed output, sleep-mode current reduction, active output discharge, power good signaling, and seamless PWM-to-power-save mode transition under dynamic loads.
Technical Context
The TPS62177DQCT implements DCS-Control™-a hybrid regulation architecture combining voltage-mode feedback with direct output-voltage sensing to enable fast transient response and stable operation with low-ESR ceramic capacitors. Its internal 0.8-V reference and fixed 3.3-V output eliminate external feedback resistors.
It supports three functional modes: PWM (≈1 MHz, continuous conduction), power save (frequency scaling at light loads), and sleep (4.8 µA IQ, reduced switching, 15 mA max sustained output). Sleep mode is controlled via dedicated SLEEP pin and features automatic exit on overcurrent to prevent rail collapse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.75 V to 28 V - supports multi-cell Li-ion, 12 V/24 V intermediate rails, and wide industrial input variations. |
| Output Voltage | Fixed 3.3 V ±2% - eliminates external resistor divider, reduces BOM count, improves thermal performance vs adjustable variants. |
| Max Output Current | 500 mA - sufficient for MCU cores, FPGAs I/O banks, and sensor signal chains without external boost. |
| Quiescent Current | 4.8 µA in sleep mode - extends battery life in hibernation states of ultra-mobile and wireless sensor nodes. |
| Switching Frequency | Typically 1 MHz - enables compact 10 µH inductor and 22 µF output capacitor solution size. |
| Power Good Output | Open-drain PG with 93–99% rising threshold - provides reliable sequencing signal for multi-rail systems without external monitoring. |
| Active Output Discharge | 175 Ω internal discharge path on VOS - ensures rapid, controlled VOUT ramp-down during shutdown, preventing backfeed or latch-up. |
Pinout & Package
TPS62177DQCT is housed in a thermally enhanced 2-mm × 3-mm, 10-pin WSON package with exposed thermal pad soldered to AGND/PGND for optimal power dissipation and EMI control.
| 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 thermal pad and system PGND plane. |
| VIN (Pin 2) | Main input supply | Accepts 4.75–28 V; requires local 2.2 µF ceramic decoupling close to pin for stability and ripple suppression. |
| EN (Pin 3) | Enable control | Active-high logic input; internal 400 kΩ pulldown ensures default disable; 1 ms soft-start prevents inrush on activation. |
| NC (Pin 4) | No connect | Internally unconnected; TI recommends connecting to AGND for mechanical stability and thermal relief. |
| FB (Pin 5) | Feedback reference | Internally tied to 0.8 V reference and 400 kΩ pulldown; connect to AGND per TI recommendation to improve thermal resistance. |
| AGND (Pin 6) | Analog ground reference | Reference for error amplifier and control circuitry; must be star-connected to PGND at single point near thermal pad. |
| PG (Pin 7) | Power good indicator | Open-drain output requiring external pullup; asserts high when VOUT reaches 93–99% of 3.3 V; sinks 2 mA at 0.3 V. |
| SLEEP (Pin 8) | Sleep mode control | Active-low input; internal pulldown maintains sleep state if host MCU pin floats; voltage rating limited to ≤7 V. |
| SW (Pin 9) | Switch node | Connects to 10 µH inductor; carries high di/dt; requires short, low-inductance trace to minimize EMI and ringing. |
| VOS (Pin 10) | Output voltage sense | Direct connection to output capacitor; enables precise regulation and activates 175 Ω active discharge path during shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast AC response (direct VOUT sensing) with stable DC regulation, enabling <10 µs load transient recovery with minimal output capacitance. |
| Seamless power save mode | Automatic transition from 1 MHz PWM to variable-frequency PSM below ~100 mA, maintaining >85% efficiency down to 100 µA load without audible noise or output perturbation. |
| 100% duty cycle operation | Enables regulation down to VIN ≈ VOUT + (IOUT × RDS(on_HS)), extending usable battery life in deep-discharge conditions (e.g., 3.6 V Li-ion → 3.3 V). |
| Integrated active output discharge | 175 Ω internal MOSFET path discharges VOUT within milliseconds upon EN deactivation, eliminating need for external discharge circuitry and reducing system-level component count. |
| Thermal and fault protection | Includes undervoltage lockout (4.6 V rise / 2.9 V fall), overtemperature shutdown (150°C, 20°C hysteresis), and cycle-by-cycle current limiting (525 mA startup / 1 A normal). |
Applications
| Industrial Sensor Node | Ultra-Mobile PC Core Supply |
|---|---|
Use Scenario: Battery-powered wireless temperature/humidity sensor operating in 10-year deployment with periodic wake-up and BLE transmission. IC Role / Device Role / Timing Role: Primary 3.3 V power rail generator for MCU, RF transceiver, and analog front-end; sleep mode activated between measurements. Use Value: 4.8 µA sleep IQ extends shelf life; active discharge prevents residual charge from interfering with next wake-up sequence. | Use Scenario: Always-on auxiliary rail powering real-time clock, secure boot ROM, and wake-on-LAN circuitry in fanless embedded PC. IC Role / Device Role / Timing Role: Standby regulator delivering regulated 3.3 V independent of main CPU rail; enabled by chipset PMIC during S3/S5 states. Use Value: 100% duty cycle operation sustains regulation as main battery drops to 3.4 V; PG signal coordinates safe entry/exit from low-power states. |
| Programmable Logic Controller I/O Module | Medical Point-of-Care Diagnostic Device |
Use Scenario: DIN-rail mounted PLC module requiring isolated 3.3 V for digital I/O buffers, ADC references, and CAN transceiver logic. IC Role / Device Role / Timing Role: Non-isolated secondary buck supplying clean, low-noise 3.3 V from 24 V field bus; immune to line transients up to 28 V. Use Value: Wide 4.75–28 V input accommodates brownouts and surges; DCS-Control™ suppresses switching noise coupling into sensitive analog measurement paths. | Use Scenario: Portable blood glucose meter with LCD, touch interface, and Bluetooth LE, powered by single Li-ion cell. IC Role / Device Role / Timing Role: Main system regulator converting 3.0–4.2 V battery to stable 3.3 V for SoC, display driver, and sensor interface. Use Value: Seamless PSM transition avoids audible coil whine during idle; 100% duty cycle extends runtime beyond 3.3 V battery knee point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62175DQCT | Adjustable output (1–6 V), requires external FB divider; same package, pinout, and DCS-Control™ core. | Used where multiple output voltages needed on same board or design reuse across product variants. | Select TPS62175DQCT only if adjustable output is required; TPS62177DQCT offers lower BOM cost and better thermal performance with FB grounded. |
| TPS63001DRCR | Buck-boost topology, 1.8–5.5 V output, 600 mA, 2.5 MHz switching; different pinout and control scheme. | Required when input may drop below 3.3 V (e.g., single-cell Li-ion discharge curve), needing regulation across full battery range. | Choose TPS63001DRCR only for true buck-boost capability; TPS62177DQCT is superior for pure step-down with higher efficiency above 3.3 V input. |
Compared with TPS62175DQCT, the TPS62177DQCT reduces design complexity and thermal resistance by fixing the output at 3.3 V and grounding FB; compared with TPS63001DRCR, it delivers higher peak efficiency (95% vs 90%) and lower quiescent current in step-down-only use cases, but cannot regulate when VIN < VOUT.
Availability
TPS62177DQCT is available at Aetrix Electronics and suitable for industrial sensor nodes, ultra-mobile PC standby supplies, and medical point-of-care diagnostics requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for TPS62177DQCT 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 ICs, with decades of expertise in high-efficiency DC/DC conversion.
The TPS6217x product line was designed specifically for space-constrained, battery-sensitive applications demanding ultra-low quiescent current, seamless light-load efficiency, and robust protection-targeting industrial IoT, portable medical, and embedded computing.
FAQ
What is the recommended input and output capacitor configuration for TPS62177DQCT?
The TPS62177DQCT requires a minimum 2.2 µF X5R/X7R ceramic input capacitor placed adjacent to VIN and PGND pins, and a 22 µF output capacitor on the VOS pin. TI validates this configuration with a 10 µH shielded inductor and achieves <10 mVpp ripple at full 500 mA load. Larger output capacitance improves sleep-mode accuracy and transient response but is not mandatory for basic operation.
Does TPS62177DQCT support forced PWM mode, or is power save mode always active?
The TPS62177DQCT does not support forced PWM mode-it automatically transitions between PWM and power save mode based on load current. At loads above ~100 mA, it operates in fixed-frequency PWM (~1 MHz); below that threshold, it seamlessly enters power save mode with frequency scaling. This behavior is inherent to the DCS-Control™ architecture and cannot be disabled or overridden via external pins.
How is the TPS62177DQCT sleep mode activated and what are its current limitations?
Sleep mode is activated by pulling the SLEEP pin low (≤0.3 V); an internal pulldown resistor ensures default sleep state if the pin is left floating. In sleep mode, TPS62177DQCT draws 4.8 µA quiescent current and sustains up to 15 mA output. Exceeding 15 mA causes VOUT droop and automatic exit to normal operation-this is a safety feature, not a specification. For sustained >15 mA, keep SLEEP high.
Can the TPS62177DQCT be used with an input voltage below 4.75 V?
The TPS62177DQCT is specified for 4.75–28 V input. Below 4.75 V, UVLO may deactivate the device (falling threshold is 2.9 V), and electrical characteristics-including output accuracy, current limit, and efficiency-are no longer guaranteed. While it may function down to ~3.4 V in 100% duty cycle mode, TI does not characterize or warrant operation outside the recommended range, and reliability risks increase significantly.
What is the purpose of the VOS pin on the TPS62177DQCT and how should it be connected?
The VOS pin on the TPS62177DQCT serves two critical functions: (1) it provides the primary feedback path for output voltage regulation, and (2) it hosts the internal 175 Ω active discharge MOSFET. It must be connected directly to the positive terminal of the 22 µF output capacitor with minimal trace length. Do not route through ferrites or RC filters-any series impedance degrades regulation accuracy and discharge speed.
TPS62177DQCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- DCS-Control™
- Package/Case:
- 10-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):
- 4.75V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (3x2)
TPS62177DQCT FAQ
1.How can I place an order for TPS62177DQCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62177DQCT 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 TPS62177DQCT reliable?
The price and inventory of TPS62177DQCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62177DQCT is usually 5 days.
3.What payment methods are accepted for TPS62177DQCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62177DQCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62177DQCT?
TPS62177DQCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62177DQCT 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 TPS62177DQCT?
For technical support, including TPS62177DQCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62177DQCT requirements.
6.How does Aetrix verify that TPS62177DQCT is sourced from the original manufacturer or authorized distributors?
All TPS62177DQCT 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 TPS62177DQCT meets industry standards.
7.What is the process for return or replacement of TPS62177DQCT?
All TPS62177DQCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62177DQCT, 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 TPS62177DQCT part is unused and in its original packaging.
Return procedure for TPS62177DQCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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