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Texas Instruments TPS62081DSGT
- Part No.:
- TPS62081DSGT
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TPS62081DSGT.pdf
- Description:
- IC REG BUCK 1.8V 1.2A 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,102
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Product details
Overview
TPS62081DSGT from Texas Instruments is a 1.2-A synchronous step-down DC/DC converter with fixed 1.8-V output, DCS-Control™ architecture, Snooze Mode (6.5-µA IQ), and 2.3-V to 6-V input range. It delivers high efficiency across load currents from microamps to 1.2 A and supports battery-powered portable devices requiring ultra-low standby current and fast transient response.
For engineers reviewing the TPS62081DSGT datasheet, TPS62081DSGT pinout, TPS62081DSGT application, or TPS62081DSGT equivalent, key selection criteria include its fixed 1.8-V output, 2-MHz nominal switching frequency, 8-pin WSON package with thermal pad, and Snooze Mode enablement via MODE pin for sub-2-mA operation.
Technical Context
The TPS62081DSGT implements DCS-Control™ topology-combining voltage-mode control with seamless PWM-to-Power-Save Mode transition-to achieve ±2.5% output voltage accuracy at no load and <20-mV output ripple. Its internal loop compensation supports >100-µF output capacitance, enabling stable regulation on noisy system rails.
It integrates dual N-MOSFET power switches (95-mΩ high-side, 70-mΩ low-side RDS(on)), undervoltage lockout (1.8–2.0 V threshold with 120-mV hysteresis), thermal shutdown (150°C), and open-drain Power Good (PG) with 90–95% VOUT detection window. Snooze Mode activation via MODE pin reduces quiescent current to 6.5 µA while maintaining regulation down to zero load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2.5% at IOUT = 0 mA; enables direct replacement of LDOs in 1.8-V logic rails without feedback resistors. |
| Input Voltage Range | 2.3 V to 6 V; supports single-cell Li-ion (2.7–4.2 V), LiFePO4, and dual-cell alkaline/NiMH batteries without external regulators. |
| Quiescent Current | 6.5 µA in Snooze Mode (MODE = HIGH); extends battery runtime in always-on sensor nodes and IoT endpoints. |
| Switching Frequency | Nominal 2 MHz; allows use of compact 1-µH inductors and ceramic capacitors, minimizing solution footprint to <25 mm². |
| Output Current | 1.2 A continuous; sufficient for powering ARM Cortex-M microcontrollers, FPGAs, and RF transceivers from a single rail. |
| Power Good Output | Open-drain PG with 90–95% VOUT threshold; provides reliable rail sequencing signal for multi-voltage systems. |
| Package | 2-mm × 2-mm WSON-8 with exposed thermal pad; achieves 59.7°C/W junction-to-ambient thermal resistance for high-power-density layouts. |
Pinout & Package
TPS62081DSGT uses an 8-pin WSON package (2.0 mm × 2.0 mm) with exposed thermal pad soldered to PCB ground for thermal and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-HIGH logic control; must be pulled to VIN or GND-floating causes undefined operation. |
| GND | Power and signal ground | Common reference for all analog and power circuits; connects directly to thermal pad for optimal heat dissipation. |
| MODE | Snooze Mode control | Logic HIGH enables 6.5-µA quiescent current mode; critical for battery life optimization in sleep states. |
| FB | Feedback input | Left floating for TPS62081DSGT (fixed 1.8-V version); not used-no external resistor divider required. |
| VOS | Output voltage sense | Connected directly to VOUT; provides accurate remote sensing to compensate for PCB trace IR drop. |
| PG | Power Good output | Open-drain signal indicating VOUT ≥95% of nominal; requires external pull-up for system sequencing or fault monitoring. |
| SW | Switch node | Connects to inductor; carries high di/dt switching current-requires tight layout and minimal loop area to reduce EMI. |
| VIN | Input supply | Accepts 2.3–6 V; requires local 10-µF ceramic capacitor placed within 3 mm of pin for high-frequency decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ Architecture | Enables <10-µs load transient response with <1% output deviation-critical for burst-mode processors and wireless modems. |
| Snooze Mode | Reduces IQ to 6.5 µA at zero load while maintaining 1.8-V regulation-extends coin-cell life beyond 5 years in low-duty-cycle sensors. |
| 100% Duty Cycle Operation | Supports dropout as low as VOUT + IOUT×RDS(on); enables full utilization of depleted Li-ion cells down to 2.3 V input. |
| Integrated Output Discharge | 1-kΩ internal discharge path activated during shutdown (EN = LOW); prevents residual voltage holdup on VOUT for safe system reset. |
| Thermal Shutdown with Hysteresis | Triggers at 150°C with 20°C hysteresis-prevents thermal cycling and ensures robust operation under sustained 1.2-A loads. |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG/PPG sensing with Bluetooth LE transmission every 5 seconds. IC Role / Device Role / Timing Role: Primary 1.8-V supply for MCU, analog front-end, and BLE radio; regulated during deep-sleep and active transmit bursts. Use Value: Snooze Mode maintains 6.5-µA IQ between transmissions, extending CR2032 battery life to >24 months. |
Use Scenario: Wireless temperature/humidity node powered by AA batteries, transmitting data hourly. IC Role / Device Role / Timing Role: Main system regulator delivering stable 1.8 V to MCU, ADC, and sub-GHz transceiver during brief wake cycles. Use Value: 100% duty cycle operation sustains regulation down to 2.3 V input, extracting maximum energy from aging alkaline cells. |
| Smartphone Camera Module | POS Terminal Power Rail |
|
Use Scenario: Dual-phase image sensor and ISP power delivery in compact mobile camera assemblies. IC Role / Device Role / Timing Role: Point-of-load regulator for 1.8-V digital core; responds to rapid current steps during auto-focus and HDR capture. Use Value: DCS-Control™ achieves <15-µs transient recovery with <12-mV undershoot-preventing image corruption during burst capture. |
Use Scenario: Embedded payment terminal with LCD, EMV chip reader, and secure element-all requiring clean 1.8-V logic supply. IC Role / Device Role / Timing Role: System rail converter fed from 3.3-V or 5-V main supply; supplies multiple ICs with tight voltage tolerance. Use Value: ±2.5% output accuracy and PG signal ensure reliable boot sequencing and brownout detection across temperature (-40°C to 125°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62080DSGT | Adjustable output (0.5–4.0 V) via FB pin; lacks fixed 1.8-V internal reference; same package and pinout. | Requires external R1/R2 divider; suitable when multiple output voltages are needed on same board. | Select TPS62080DSGT only if design flexibility outweighs BOM simplification-TPS62081DSGT eliminates two resistors and layout risk. |
| TPS62840DRLT | Lower IQ (300 nA in shutdown, 600 nA in ultra-low-power mode); 1.8-V fixed output; 2-MHz switching; same 2-mm × 2-mm WSON-8. | Superior for >10-year battery life; but lower 0.6-A output current limits use with higher-power peripherals. | Choose TPS62840DRLT for ultra-long-life applications with <600-mA peak load; retain TPS62081DSGT for 1.2-A capability and proven industrial reliability. |
Compared with TPS62080DSGT, TPS62081DSGT saves BOM cost and layout space by eliminating feedback resistors while delivering identical efficiency and transient performance at 1.8 V. Against TPS62840DRLT, it trades 300-nA shutdown IQ for 2× output current headroom and broader industrial temperature support.
Availability
TPS62081DSGT is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, smartphone camera modules, and POS terminal power rails requiring stable component supply, long-lifecycle assurance, and production-ready qualification.
Supply support for TPS62081DSGT 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 silicon solutions.
The TPS6208x family was designed for high-efficiency, low-quiescent-current DC/DC conversion in space-constrained, battery-sensitive applications-emphasizing seamless light-load efficiency, fast transient response, and robust thermal performance in miniature packages.
FAQ
What is the output voltage tolerance of the TPS62081DSGT under full temperature range?
The TPS62081DSGT guarantees ±2.5% output voltage accuracy over –40°C to 125°C junction temperature, measured at zero load and VIN ≥2.3 V. This specification ensures reliable operation of 1.8-V I/O interfaces and memory subsystems without additional margining in thermal-critical designs.
Does the TPS62081DSGT require external feedback resistors?
No-the TPS62081DSGT is a fixed 1.8-V output variant and does not require external feedback resistors. The FB pin must be left floating or tied to GND per datasheet guidance. This eliminates resistor matching errors and reduces PCB area versus adjustable versions like TPS62080DSGT.
How does Snooze Mode affect transient response in the TPS62081DSGT?
In Snooze Mode (MODE = HIGH), the TPS62081DSGT's control loop enters low-power monitoring-causing ~10–20 µs wake-up latency before correcting output deviations. For dynamic loads exceeding 2 mA, TI recommends disabling Snooze Mode via MODE = LOW to maintain full DCS-Control™ bandwidth and <10-µs transient response.
What is the recommended inductor value for the TPS62081DSGT in a typical 1.8-V/1.2-A application?
Texas Instruments specifies a 1.0-µH shielded power inductor (e.g., Coilcraft XFL3012-102MEB) for the TPS62081DSGT in standard 1.8-V applications. This value balances peak current ripple (~30% of IOUT), size, and efficiency-enabling full 1.2-A output with <20-mV ripple using 22-µF output capacitance.
Can the TPS62081DSGT operate with input voltage below 2.3 V?
No-the TPS62081DSGT has a hard undervoltage lockout (UVLO) threshold of 1.8–2.0 V with 120-mV hysteresis. Input voltage below 2.3 V will cause immediate shutdown; operation is only guaranteed within the specified 2.3–6 V range. For sub-2.3-V inputs, consider TI's TPS62840 series or discrete LDO solutions.
TPS62081DSGT 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)
TPS62081DSGT FAQ
1.How can I place an order for TPS62081DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62081DSGT 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 TPS62081DSGT reliable?
The price and inventory of TPS62081DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62081DSGT is usually 5 days.
3.What payment methods are accepted for TPS62081DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62081DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62081DSGT?
TPS62081DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62081DSGT 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 TPS62081DSGT?
For technical support, including TPS62081DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62081DSGT requirements.
6.How does Aetrix verify that TPS62081DSGT is sourced from the original manufacturer or authorized distributors?
All TPS62081DSGT 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 TPS62081DSGT meets industry standards.
7.What is the process for return or replacement of TPS62081DSGT?
All TPS62081DSGT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62081DSGT, 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 TPS62081DSGT part is unused and in its original packaging.
Return procedure for TPS62081DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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