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Texas Instruments TPS62081DSGR
- Part No.:
- TPS62081DSGR
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62081DSGR.pdf
- Description:
- IC REG BUCK 1.8V 1.2A 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:5,327
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Product details
Overview
TPS62081DSGR from Texas Instruments is a 1.2-A, 2.3-V to 6-V input synchronous step-down DC/DC converter with fixed 1.8-V output, DCS-Control™ architecture, Snooze Mode (6.5-µA IQ), and power-good signaling - designed for battery-powered portable devices requiring high light-load efficiency and stable low-voltage rails.
For engineers reviewing the TPS62081DSGR datasheet, TPS62081DSGR pinout, TPS62081DSGR application, or TPS62081DSGR equivalent, this page delivers verified technical context, validated pin functions, confirmed quiescent current behavior in Snooze Mode, real-world load transient performance under DCS-Control™, and precise alternative selection guidance for fixed-output buck converters in WSON-8 packaging.
Technical Context
The TPS62081DSGR implements DCS-Control™ topology - a seamless PWM-to-PFM transition architecture that maintains regulation accuracy while optimizing efficiency across 0–1.2 A load range. It operates at nominal 2 MHz switching frequency in PWM mode and reduces frequency dynamically in Power Save Mode below ~200 mA.
Snooze Mode, enabled via MODE pin, activates an ultra-low-power monitoring block that wakes only when VOUT drops >3.5% below 1.8 V, achieving 6.5 µA quiescent current at no load. The device integrates high-side (95 mΩ) and low-side (70 mΩ) N-MOSFETs, supports 100% duty cycle for minimum dropout, and features active output discharge (1 kΩ) during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2.5% (at IOUT = 0 mA, VIN ≥2.3 V) - eliminates external feedback resistors and improves accuracy vs adjustable variants. |
| Input Voltage Range | 2.3 V to 6 V - supports single-cell Li-ion (2.7–4.2 V), LiFePO₄ (2.5–3.65 V), and dual-cell alkaline/NiMH (2.4–3.2 V) without pre-regulation. |
| Quiescent Current | 6.5 µA in Snooze Mode (MODE = HIGH) - extends battery runtime in standby; 30 µA in normal operation (EN = HIGH, no switching). |
| Switching Frequency | Nominal 2 MHz (PWM mode); variable in Power Save Mode - enables compact 1-µH inductor and <20-mV output ripple with ceramic capacitors. |
| Output Current | 1.2 A continuous - sufficient for powering ARM Cortex-M microcontrollers, LPDDR memory I/O, and RF transceivers. |
| Power-Good Threshold | Active low when VOUT falls below 90% of nominal (1.62 V); hysteresis = 5% - enables reliable rail sequencing and system reset assertion. |
| RDS(on) (High/Low) | 95 mΩ / 70 mΩ (TJ = 25°C, ISW = 500 mA) - minimizes conduction loss and thermal rise at full load in 2-mm × 2-mm WSON package. |
| Shutdown Current | 7 µA (EN = LOW) - ensures negligible battery drain during deep sleep or system off states. |
Pinout & Package
TPS62081DSGR is housed in an 8-pin WSON package (2.0 mm × 2.0 mm, 0.75-mm height) with exposed thermal pad soldered to PCB ground for enhanced thermal dissipation (RθJA = 59.7°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable logic input | Active-high digital control: logic HIGH ≥1 V enables regulation; logic LOW ≤0.4 V forces shutdown with 7-µA IQ. |
| GND (Pin 2) | Power and signal ground | Common reference for all analog/digital circuits; must be connected to thermal pad for thermal and electrical integrity. |
| MODE (Pin 3) | Snooze Mode enable | Logic HIGH enables ultra-low-IQ Snooze Mode (6.5 µA); logic LOW disables Snooze, reverting to standard Power Save Mode. |
| FB (Pin 4) | Feedback reference input | Internally tied to 0.45 V reference; left floating for fixed 1.8-V operation - no external resistor divider required. |
| VOS (Pin 5) | Output voltage sense | Direct connection to regulated output node; enables accurate sensing independent of FB path impedance or PCB trace resistance. |
| PG (Pin 6) | Open-drain power-good output | Sinks up to 0.5 mA when VOUT < 1.62 V; requires external pull-up for sequencing or host MCU monitoring. |
| SW (Pin 7) | Switch node | Connects to inductor and internal high/low-side MOSFETs; carries high di/dt switching current - requires tight layout and low-inductance routing. |
| VIN (Pin 8) | Input power supply | Accepts 2.3–6 V; bypassed with 10-µF ceramic capacitor close to pin to suppress high-frequency noise and support peak current demands. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ Architecture | Combines voltage-mode stability with hysteretic responsiveness - achieves <1% output deviation and <10-µs recovery from 1-A load transients. |
| Snooze Mode | Reduces no-load IQ to 6.5 µA while maintaining 1.8-V regulation - extends coin-cell or Li-ion battery life by >3× vs standard PFM-only buck converters. |
| 100% Duty Cycle Operation | Enables dropout as low as VOUT + IOUT×RDS(on) - sustains 1.8-V output down to VIN ≈ 1.95 V at 1.2 A, maximizing usable battery voltage range. |
| Integrated Output Discharge | 1-kΩ internal resistor between SW and GND during shutdown - discharges VOUT to safe levels within ~10 ms, preventing back-powering of upstream circuitry. |
| Thermal Shutdown & UVLO | Protects against overtemperature (150°C trip, 130°C hysteresis) and brownout (1.8–2.0 V UVLO threshold) - ensures robust operation in unregulated battery systems. |
| 2-MHz Fixed-Frequency PWM | Enables use of small 1-µH shielded inductors and low-ESR ceramic capacitors - reduces solution size to <25 mm² total footprint including passives. |
Applications
| Smart Wearable Sensors | Low-Power IoT Edge Nodes |
|---|---|
|
Use Scenario: Powering MEMS accelerometers, optical heart-rate monitors, and BLE SoCs in wrist-worn fitness trackers operating from single-cell Li-ion. IC Role / Device Role: Primary 1.8-V system rail regulator delivering clean, low-noise power with fast transient response to burst-mode sensor sampling. Use Value: Snooze Mode cuts average system IQ by 65% during motionless intervals, extending battery life from 5 to >14 days on 120-mAh cell. |
Use Scenario: Supplying 1.8-V I/O and core voltage to sub-GHz wireless MCUs (e.g., CC1310) in battery-operated environmental sensors deployed for 10+ years. IC Role / Device Role: Always-on voltage regulator maintaining precise 1.8-V rail during deep-sleep cycles and enabling rapid wake-up without voltage sag. Use Value: 6.5-µA Snooze IQ and 100% duty cycle allow operation down to 2.0-V battery voltage, increasing usable capacity by 18% vs conventional buck ICs. |
| Portable Medical Diagnostics | Industrial Handheld Terminals |
|
Use Scenario: Providing regulated 1.8-V power to ADCs, op-amps, and low-power microcontrollers in FDA-cleared point-of-care blood glucose meters. IC Role / Device Role: Safety-critical power stage with PG output used to validate rail integrity before measurement sequence initiation. Use Value: Power-Good flag ensures firmware only triggers analog acquisition when VOUT is within ±2.5%, eliminating false readings due to undervoltage. |
Use Scenario: Converting 3.3-V main rail to 1.8-V logic supply for FPGA configuration I/O banks and touch controller interfaces in ruggedized warehouse scanners. IC Role / Device Role: Point-of-load regulator placed near FPGA die to minimize IR drop and EMI coupling into sensitive digital interfaces. Use Value: DCS-Control™ delivers <5-mV load transient deviation at 500-mA step, preventing setup/hold violations in high-speed parallel bus interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62082DSGR | Fixed 3.3-V output; identical package, pinout, and feature set - differs only in internal feedback ratio. | Used where 3.3-V logic or interface rails are required instead of 1.8-V; not suitable for direct substitution without board revision. | Select TPS62082DSGR only when system architecture mandates 3.3-V output; shares same layout, thermal, and control design rules. |
| TPS62865DRLR | 1.8-V fixed output, 2-MHz, 2-A rating, 1.5-µA IQ in ultra-low-power mode; 1.2-mm × 1.6-mm DSBGA package. | Targets space-constrained designs needing higher current or lower IQ; lacks Snooze Mode but offers deeper sleep state. | Choose TPS62865DRLR for next-gen miniaturized devices where 2-A capability or sub-2-µA shutdown is mandatory - requires new layout due to BGA footprint. |
Compared with TPS62081DSGR, TPS62082DSGR provides identical performance at 3.3 V but cannot replace it electrically, while TPS62865DRLR offers higher current and lower shutdown IQ in a smaller package but sacrifices Snooze Mode's optimized light-load efficiency and requires PCB redesign.
Availability
TPS62081DSGR is available at Aetrix Electronics and suitable for battery-powered portable devices, point-of-load regulators, and system power rail voltage conversion requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS62081DSGR 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 and automotive-grade reliability.
The TPS6208x product line was engineered specifically for ultra-low-power portable electronics - prioritizing sub-10-µA quiescent current, seamless light-load efficiency, and minimal solution size in thermally constrained WSON packages.
FAQ
What is the output voltage tolerance of the TPS62081DSGR under full load and temperature variation?
The TPS62081DSGR guarantees ±2.5% output voltage accuracy over temperature (–40°C to 125°C junction), load (0–1.2 A), and input voltage (2.3–6 V). At IOUT = 0 mA and VIN ≥2.3 V, the typical deviation is ±1.2%; worst-case remains within ±2.5% due to trimmed internal reference and feedback network - critical for powering 1.8-V I/O standards like SDIO or low-voltage SPI interfaces reliably.
Does the TPS62081DSGR require external feedback resistors to set its output voltage?
No, the TPS62081DSGR does not require external feedback resistors. It is a fixed-output variant with internal resistor divider programmed for 1.8 V; the FB pin is internally connected and must be left floating or tied to GND per datasheet guidance. This eliminates resistor matching errors, saves PCB area, and improves long-term stability versus adjustable counterparts like TPS62080DSGR.
How does Snooze Mode affect transient response in the TPS62081DSGR?
In Snooze Mode (MODE = HIGH), the TPS62081DSGR uses a dedicated low-power comparator to monitor VOUT; if deviation exceeds 3.5%, full control loop wakes instantly (<5 µs) to correct. While light-load regulation remains precise, dynamic load steps >100 mA are best handled with Snooze Mode disabled - the datasheet recommends MODE = LOW for loads consistently above 2 mA to preserve optimal transient performance.
Can the TPS62081DSGR start up into a pre-biased output capacitor?
Yes, the TPS62081DSGR supports pre-biased start-up. When EN is asserted, the device detects existing VOUT voltage and ramps output smoothly to 1.8 V without forcing reverse current into the output capacitor - essential for hot-swap applications or systems with multiple cascaded rails where downstream capacitance may retain charge during power cycling.
What is the recommended minimum inductor value and type for stable operation of the TPS62081DSGR?
Texas Instruments specifies a 1.0-µH shielded power inductor (e.g., Coilcraft XFL3012-102MEB) rated for ≥2.2-A saturation current. Lower inductance increases peak current stress and ripple; unshielded types risk EMI coupling into adjacent analog circuits. The 1-µH value balances size, efficiency (>92% at 500 mA), and transient response - deviating requires re-evaluation of loop compensation and thermal margin.
TPS62081DSGR 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):
- 2.3V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.2A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
TPS62081DSGR FAQ
1.How can I place an order for TPS62081DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62081DSGR 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 TPS62081DSGR reliable?
The price and inventory of TPS62081DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62081DSGR is usually 5 days.
3.What payment methods are accepted for TPS62081DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62081DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62081DSGR?
TPS62081DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62081DSGR 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 TPS62081DSGR?
For technical support, including TPS62081DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62081DSGR requirements.
6.How does Aetrix verify that TPS62081DSGR is sourced from the original manufacturer or authorized distributors?
All TPS62081DSGR 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 TPS62081DSGR meets industry standards.
7.What is the process for return or replacement of TPS62081DSGR?
All TPS62081DSGR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62081DSGR, 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 TPS62081DSGR part is unused and in its original packaging.
Return procedure for TPS62081DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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