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Texas Instruments TPS62177DQCR
- Part No.:
- TPS62177DQCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TPS62177DQCR.pdf
- Description:
- IC REG BUCK 3.3V 500MA 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:19,752
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Product details
Overview
TPS62177DQCR from Texas Instruments is a fixed-output 3.3 V, 500-mA synchronous step-down DC/DC converter with DCS-Control™ topology, operating from 4.75 V to 28 V input. It features 4.8 µA quiescent current in sleep mode, 1 MHz typical switching frequency, and integrated power good (PG) output - designed for ultra-low-power microcontroller supply rails in battery-powered industrial sensors and embedded PCs.
For engineers reviewing the TPS62177DQCR datasheet, TPS62177DQCR pinout, TPS62177DQCR application, or TPS62177DQCR equivalent, key selection criteria include its 3.3 V fixed output, sleep-mode IQ of 4.8 µA, 10-pin WSON package, active output discharge, and seamless PWM-to-power-save mode transition under light loads.
Technical Context
The TPS62177DQCR implements DCS-Control™ - a hybrid regulation architecture combining voltage-mode feedback with direct output-voltage sensing via fast comparator ramp control. This enables stable operation with low-ESR ceramic capacitors and immediate transient response without external compensation.
It supports three functional modes: PWM (1 MHz, continuous conduction), power save mode (frequency reduction at light loads), and sleep mode (4.8 µA IQ, fixed on-time control). The device includes undervoltage lockout (4.6 V rising threshold), thermal shutdown (150°C), and 100% duty cycle operation for near-dropout conditions.
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 feedback resistors, reduces BOM count and layout area |
| Max Output Current | 500 mA - sufficient for MCU cores, RF transceivers, and low-power peripherals |
| Quiescent Current | 4.8 µA in sleep mode - extends battery life in hibernation states of ultra-mobile and sensor nodes |
| Switching Frequency | Typically 1 MHz - enables compact 10 µH inductor and 22 µF output capacitor solution |
| Power Good Output | Open-drain PG with 93–99% VOUT threshold - provides reliable sequencing signal for system reset and rail monitoring |
| Active Output Discharge | 175 Ω internal discharge path on VOS - ensures safe, rapid VOUT collapse during shutdown |
Pinout & Package
TPS62177DQCR is housed in a thermally enhanced 2.0 mm × 3.0 mm, 10-pin WSON package with exposed thermal pad soldered to AGND/PGND for optimal power dissipation and EMI performance.
| 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 |
| VIN (Pin 2) | Main input supply | Accepts 4.75–28 V; decoupled with 2.2 µF ceramic capacitor close to pin |
| EN (Pin 3) | Enable control | Active-high logic; internal 400 kΩ pulldown ensures default disable; 1 ms soft-start on enable |
| NC (Pin 4) | No connect | Not internally bonded; recommended to tie to AGND for thermal and noise integrity |
| FB (Pin 5) | Feedback reference | Internally tied to AGND for fixed 3.3 V operation; improves thermal resistance when externally grounded |
| AGND (Pin 6) | Analog ground reference | Reference for error amplifier and control circuitry; separate from PGND but joined at single point |
| PG (Pin 7) | Power good indicator | Open-drain output requiring external pullup; sinks 2 mA while asserting low during fault or shutdown |
| SLEEP (Pin 8) | Sleep mode control | Active-low input; internal pulldown maintains sleep if host MCU pin floats; max 7 V rating |
| SW (Pin 9) | Switch node | Connects to 10 µH inductor; high dv/dt node requiring tight loop and guard ring |
| VOS (Pin 10) | Output voltage sense | Direct connection to output capacitor; enables active discharge and precise regulation loop sensing |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Combines fast transient response (via direct output sensing) with stable DC regulation - eliminates need for external compensation network |
| Seamless power save mode | Automatic transition from 1 MHz PWM to variable-frequency light-load operation - no output voltage glitch or control loop reconfiguration |
| 100% duty cycle capability | Maintains regulation down to VIN ≈ VOUT + (IOUT × RDS(on_HS) + IOUT × RL) - extends runtime in battery discharge tail-end |
| Active output discharge | 175 Ω internal FET discharges VOUT within milliseconds after EN deassertion - prevents unintended wake-up or latch-up in downstream logic |
| Thermal and fault protection | Integrated thermal shutdown (150°C, 20°C hysteresis), UVLO (4.6 V rising), short-circuit limiting, and PG fault signaling - enables robust standalone operation |
Applications
| Industrial Sensor Node | Ultra-Mobile PC Core Rail |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor with BLE radio transmitting every 5 minutes. IC Role / Device Role / Timing Role: Primary 3.3 V supply for MCU, sensor IC, and RF transceiver; enters sleep mode between transmissions. Use Value: 4.8 µA sleep IQ minimizes standby drain; active discharge prevents residual voltage from powering BLE chip unintentionally. |
Use Scenario: Always-on auxiliary rail for SoC real-time clock and wake-on-LAN circuitry in fanless embedded PC. IC Role / Device Role / Timing Role: Standby power source maintaining system context during S3/S4 sleep states. Use Value: 100% duty cycle operation sustains 3.3 V output even as main 12 V battery drops to 3.6 V; PG signal triggers wake sequence. |
| Microcontroller Power Management | High-Efficiency LDO Replacement |
Use Scenario: Low-power ARM Cortex-M4 MCU with dynamic voltage scaling across active/idle/sleep states. IC Role / Device Role / Timing Role: Adaptive supply delivering 3.3 V at up to 500 mA during active execution, then dropping to µA-level IQ in deep sleep. Use Value: Sleep mode reduces IQ by >5× vs. standard buck; DCS-Control ensures <10 mV undershoot during 100 mA load step. |
Use Scenario: Replacing linear regulator in 24 V industrial I/O module where heat dissipation and efficiency are critical. IC Role / Device Role / Timing Role: Efficient 3.3 V generation from 24 V bus, replacing inefficient 20.7 V dropout LDO. Use Value: >90% efficiency at 300 mA (vs. ~14% for LDO), eliminating heatsink; 2.0 × 3.0 mm WSON footprint matches common LDO packages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62175DQCR | Adjustable output (1–6 V) via FB resistor divider; identical pinout, package, and DCS-Control™ core | Requires two external resistors; suited for designs needing multiple output voltages or future flexibility | Select when adjustable VOUT or shared PCB layout across variants is required - same thermal and layout design applies |
| TPS63001DRCR | Buck-boost topology; 1.8–5.5 V input, 3.3 V fixed output; higher 93% peak efficiency but 2.5 µA IQ (no sleep mode) | Supports input voltages below 3.3 V (e.g., single Li-ion); lacks sleep mode and PG output | Choose only when VIN may fall below VOUT - TPS62177DQCR is superior for 4.75–28 V fixed-rail applications with sleep requirements |
Compared with TPS62175DQCR, the TPS62177DQCR saves board space and BOM cost by eliminating feedback resistors, while retaining identical sleep mode, thermal performance, and package compatibility. Against TPS63001DRCR, it delivers lower IQ in sleep, integrated PG, and optimized efficiency across 12 V/24 V inputs - making it the preferred choice for fixed 3.3 V industrial and embedded supplies.
Availability
TPS62177DQCR is available at Aetrix Electronics and suitable for industrial sensor nodes, ultra-mobile PC standby rails, microcontroller power management systems, and high-efficiency LDO replacement applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS62177DQCR 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-reliability DC/DC conversion.
The TPS6217x product line was engineered specifically for ultra-low-power, wide-input industrial and portable applications - emphasizing minimal quiescent current, seamless light-load efficiency, and robust integration in compact WSON packages.
FAQ
What is the output voltage tolerance of the TPS62177DQCR under full load and temperature range?
The TPS62177DQCR delivers a fixed 3.3 V output with ±2% accuracy in PWM mode across –40°C to 85°C ambient and 4.75–28 V input. At light loads (<15 mA) in sleep mode, accuracy degrades to ±2.7%, which can be improved by increasing output capacitance per TI's Application Note SLVSB35C Section 7.5.
Does the TPS62177DQCR require external feedback resistors to set its output voltage?
No - the TPS62177DQCR is factory-programmed for fixed 3.3 V output. Its FB pin is internally connected to AGND via a 400 kΩ resistor. TI recommends externally connecting FB to AGND to improve thermal resistance and reduce thermal impedance by ~10°C/W.
How does the sleep mode of the TPS62177DQCR differ from standard shutdown mode?
In sleep mode (SLEEP = Low), the TPS62177DQCR maintains regulated 3.3 V output while reducing quiescent current to 4.8 µA; in shutdown mode (EN = Low), output is disabled and IQ drops to <2 µA. Sleep mode supports dynamic entry/exit and delivers up to 15 mA, whereas shutdown fully disables regulation and discharge.
Can the TPS62177DQCR operate with input voltage below 4.75 V?
The TPS62177DQCR has an undervoltage lockout (UVLO) threshold of 4.6 V (rising) and 2.9 V (falling). Below 4.75 V, operation is not guaranteed per specification - though the device may regulate down to ~3.6 V in 100% duty cycle mode if load is light and thermal limits permit. Electrical characteristics are not specified below 4.75 V.
What is the purpose of the VOS pin on the TPS62177DQCR, and how should it be connected?
The VOS pin on the TPS62177DQCR provides direct sensing of the output voltage for the control loop and enables active output discharge. It must be connected directly to the output capacitor's positive terminal - not to the load - to ensure accurate regulation and proper discharge function during shutdown.
TPS62177DQCR 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)
TPS62177DQCR FAQ
1.How can I place an order for TPS62177DQCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62177DQCR 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 TPS62177DQCR reliable?
The price and inventory of TPS62177DQCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62177DQCR is usually 5 days.
3.What payment methods are accepted for TPS62177DQCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62177DQCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62177DQCR?
TPS62177DQCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62177DQCR 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 TPS62177DQCR?
For technical support, including TPS62177DQCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62177DQCR requirements.
6.How does Aetrix verify that TPS62177DQCR is sourced from the original manufacturer or authorized distributors?
All TPS62177DQCR 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 TPS62177DQCR meets industry standards.
7.What is the process for return or replacement of TPS62177DQCR?
All TPS62177DQCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62177DQCR, 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 TPS62177DQCR part is unused and in its original packaging.
Return procedure for TPS62177DQCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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