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Texas Instruments TPS62261DRVT
- Part No.:
- TPS62261DRVT
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS62261DRVT.pdf
- Description:
- IC REG BUCK 1.8V 600MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:984
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Product details
Overview
TPS62261DRVT from Texas Instruments is a synchronous step-down DC/DC converter optimized for battery-powered portable electronics. It delivers up to 600 mA output current from 2 V–6 V input, features fixed 1.8 V output, operates at 2.25 MHz switching frequency, and supports power save mode (PFM) with dynamic voltage positioning for load transients.
For engineers reviewing the TPS62261DRVT datasheet, TPS62261DRVT pinout, TPS62261DRVT application, or TPS62261DRVT equivalent, key selection considerations include its 2-mm × 2-mm WSON-6 package, 15-μA quiescent current in PFM mode, ±1.5% output voltage accuracy in PWM mode, 100% duty cycle low-dropout operation, and MODE pin-controlled PWM/PFM transition for noise-sensitive designs.
Technical Context
The TPS62261DRVT uses voltage-mode control with input voltage feed-forward for fast line/load regulation. Its integrated high-side (480 mΩ max) and low-side (380 mΩ max) MOSFETs enable synchronous rectification, while the 2.25-MHz oscillator ensures compact external components. The device implements automatic PFM-to-PWM transition based on inductor current zero-crossing detection.
Dynamic voltage positioning raises the regulated output by +1% in PFM mode to minimize undershoot during light-to-heavy load steps. Undervoltage lockout (1.85 V falling threshold) prevents deep battery discharge, and thermal shutdown activates at 140°C with 20°C hysteresis to protect against sustained overload conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V - eliminates external feedback resistors and simplifies layout for single-rail applications. |
| Max Output Current | 600 mA at VIN ≥ 2.5 V - supports core logic rails in smartphones and portable media players. |
| Input Voltage Range | 2 V to 6 V - compatible with single Li-ion (2.7–4.2 V), two/three-cell alkaline, and 3.3 V/5 V rails. |
| Switching Frequency | 2.25 MHz (fixed) - enables use of small 2.2 μH inductors and 10 μF ceramic capacitors for <1-mm solution height. |
| Quiescent Current | 15 μA in PFM mode - extends battery life in standby or low-power monitoring states. |
| Shutdown Current | 0.1 μA - reduces system leakage when powered off via EN pin control. |
| Output Accuracy | ±1.5% in PWM mode - ensures stable core voltage under varying load and temperature (–40°C to 85°C). |
| Package | WSON-6 (2.0 mm × 2.0 mm × 0.8 mm) - surface-mount, thermally enhanced package with exposed power pad. |
Pinout & Package
TPS62261DRVT is housed in a 6-pin WSON package (2.0 mm × 2.0 mm × 0.8 mm) with an exposed thermal pad (Pin 6 = GND). The package supports high-density PCB layouts and efficient heat dissipation through the bottom-side pad soldered to a thermal copper plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 5) | Power input supply | Accepts 2–6 V; requires local 4.7 μF ceramic decoupling capacitor to suppress high-frequency ripple. |
| GND (Pin 6) | Ground reference and thermal pad | Primary return path for power and control circuits; must be connected to large PCB ground plane for thermal and EMI performance. |
| EN (Pin 4) | Enable control input | Active-high logic; pulling low disables converter and reduces current draw to 0.1 μA; supports power sequencing. |
| SW (Pin 1) | Switch node | Connects to external 2.2 μH inductor; carries high di/dt switching current - requires short, low-inductance routing. |
| FB (Pin 3) | Feedback input | Internally connected to 1.8 V reference; no external resistor divider needed for fixed-output variant. |
| MODE (Pin 2) | Operating mode select | Pull to GND for automatic PFM/PWM transition; pull to VIN for forced fixed-frequency PWM - critical for EMI filtering. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic voltage positioning | Maintains +1% output offset in PFM mode to reduce load-step undershoot by >30 mV without increasing output capacitance. |
| 100% duty cycle operation | Enables dropout as low as 120 mV at 600 mA (VIN = 2.0 V → VOUT = 1.8 V), maximizing usable battery voltage range. |
| Integrated MOSFETs | High-side RDS(on) ≤ 480 mΩ and low-side RDS(on) ≤ 380 mΩ at 3.6 V - eliminate external FETs and gate drivers. |
| Soft-start ramp time | 250 μs (5% to 95% VOUT) - limits inrush current to <1 A and prevents input rail collapse on weak sources like coin cells. |
| Thermal shutdown protection | Activates at TJ = 140°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Undervoltage lockout | Falling threshold at 1.85 V - avoids brownout operation and protects Li-ion batteries from over-discharge below 2.5 V. |
Applications
| Mobile Phone Core Rail | Portable Media Player DSP Supply |
|---|---|
|
Use Scenario: Powers ARM Cortex-A series application processor core at 1.8 V in slim smartphone designs with tight board space. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering clean, dynamically responsive 1.8 V from shared 3.6 V battery rail. Use Value: Dynamic voltage positioning maintains <±20 mV transient deviation during CPU burst activity, eliminating need for oversized output capacitance. |
Use Scenario: Supplies low-noise 1.8 V to audio DSP and codec in handheld music players operating from dual alkaline cells (2.4–3.2 V). IC Role / Device Role / Timing Role: High-efficiency buck converter enabling >15-hour playback via 15-μA PFM quiescent current during pause/idle states. Use Value: 2.25-MHz fixed-frequency PWM mode (via MODE pin) allows simple LC filtering to meet <10 mVpp audio-band ripple requirements. |
| Wireless Sensor Node MCU Supply | Industrial Handheld Scanner Logic Rail |
|
Use Scenario: Powers ultra-low-power MCU (e.g., MSP430FRxx) in battery-operated IoT sensor nodes with multi-year lifetime targets. IC Role / Device Role / Timing Role: Always-on power management IC providing regulated 1.8 V during sleep (PFM) and active (PWM) modes. Use Value: 0.1 μA shutdown current and 15 μA PFM IQ extend CR2032 battery life beyond 7 years in 1% duty-cycle sensing applications. |
Use Scenario: Delivers robust 1.8 V to FPGA configuration logic and barcode image sensor interface in ruggedized industrial scanners. IC Role / Device Role / Timing Role: Input-rail tolerant buck converter supporting wide 2.7–5.5 V input from USB or internal LiPo, with thermal fault resilience. Use Value: 140°C thermal shutdown and 100% duty cycle operation ensure continuous function across –20°C to 60°C ambient, even during extended scanning bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62260DRVT | Adjustable output (0.6 V–VIN); requires external FB divider; same WSON-6 package and 2.25-MHz operation. | Suitable where multiple output voltages are needed on one board or future design flexibility is required. | Select TPS62260DRVT only if adjustable output is necessary - adds BOM cost and layout complexity versus fixed 1.8 V. |
| TPS62262DRVT | Fixed 1.2 V output; identical package, pinout, and electrical specs except reference voltage and FB network. | Used for lower-voltage I/O or memory rails where 1.2 V matches SoC interface requirements. | Choose TPS62262DRVT when system architecture mandates 1.2 V - no functional trade-offs, direct substitution within voltage-constrained subsystems. |
Compared with TPS62260DRVT and TPS62262DRVT, the TPS62261DRVT provides optimal balance of simplicity (no FB resistors), efficiency (15 μA IQ), and compatibility with 1.8 V core logic - making it the preferred choice for cost-sensitive, space-constrained mobile applications requiring that exact voltage.
Availability
TPS62261DRVT is available at Aetrix Electronics and suitable for mobile phones, portable media players, and wireless sensor nodes requiring stable component supply with consistent parametric performance across production lots.
Supply support for TPS62261DRVT 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 connectivity technologies, with decades of expertise in power management ICs for portable and industrial systems.
The TPS6226x product line was designed specifically for high-efficiency, space-constrained battery-powered applications - emphasizing ultra-small solution size (<1 mm height), wide input range, and intelligent power-save operation without sacrificing transient response.
FAQ
What is the output voltage of the TPS62261DRVT?
The TPS62261DRVT provides a factory-trimmed fixed output voltage of 1.8 V. This eliminates the need for external feedback resistors, reducing component count and PCB area. The output voltage accuracy is ±1.5% in PWM mode across temperature and load, ensuring reliable operation for 1.8 V logic rails in portable devices.
Does the TPS62261DRVT require an external feedback resistor network?
No, the TPS62261DRVT does not require external feedback resistors because it integrates the voltage divider for its fixed 1.8 V output. The FB pin is internally connected to the 0.6 V reference and output node, simplifying design and improving noise immunity compared to adjustable variants like the TPS62260DRVT.
How does the MODE pin affect operation of the TPS62261DRVT?
The MODE pin on the TPS62261DRVT selects between two operating modes: pulling MODE to GND enables automatic PFM/PWM transition for peak efficiency across load range, while pulling MODE to VIN forces fixed-frequency 2.25-MHz PWM operation - essential for predictable EMI filtering in noise-sensitive applications like audio subsystems.
What thermal protection features does the TPS62261DRVT include?
The TPS62261DRVT incorporates thermal shutdown that activates at a junction temperature of 140°C (typical), turning off both high-side and low-side MOSFETs. Recovery occurs after temperature falls by 20°C hysteresis. This protects the device during sustained overload or inadequate PCB thermal design without requiring external circuitry.
Can the TPS62261DRVT operate with input voltage below 2 V?
No - the absolute minimum input voltage for the TPS62261DRVT is 2 V per the recommended operating conditions. Operation below this risks undervoltage lockout activation (threshold 1.85 V falling), which disables the output. For sub-2 V inputs, consider alternative regulators such as the TPS61099 or boost-buck architectures.
What is the purpose of dynamic voltage positioning in the TPS62261DRVT?
Dynamic voltage positioning in the TPS62261DRVT raises the regulated output to +1% above nominal (i.e., ~1.818 V) during PFM mode. This headroom compensates for voltage drop during sudden load increases - reducing output undershoot by up to 35 mV and eliminating need for extra bulk capacitance in portable applications with bursty workloads.
TPS62261DRVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN 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):
- 2V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (2x2)
TPS62261DRVT FAQ
1.How can I place an order for TPS62261DRVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62261DRVT 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 TPS62261DRVT reliable?
The price and inventory of TPS62261DRVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62261DRVT is usually 5 days.
3.What payment methods are accepted for TPS62261DRVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62261DRVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62261DRVT?
TPS62261DRVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62261DRVT 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 TPS62261DRVT?
For technical support, including TPS62261DRVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62261DRVT requirements.
6.How does Aetrix verify that TPS62261DRVT is sourced from the original manufacturer or authorized distributors?
All TPS62261DRVT 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 TPS62261DRVT meets industry standards.
7.What is the process for return or replacement of TPS62261DRVT?
All TPS62261DRVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62261DRVT, 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 TPS62261DRVT part is unused and in its original packaging.
Return procedure for TPS62261DRVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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