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Texas Instruments TPS61261DRVR
- Part No.:
- TPS61261DRVR
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS61261DRVR.pdf
- Description:
- IC REG BOOST 3.3V 100MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:7,413
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Product details
Overview
TPS61261DRVR from Texas Instruments is a 3.3-V fixed-output synchronous boost converter IC designed for ultra-low-input-voltage battery-powered systems. It operates from 0.8 V to 4.0 V input, delivers up to 100 mA output current at 3.3 V, features 2.5-MHz quasi-fixed-frequency PWM control, 29-µA quiescent current, and integrated load disconnect during shutdown - enabling coin-cell and single alkaline/NiMH/NiCd operation in space-constrained medical and portable devices.
For engineers reviewing the TPS61261DRVR datasheet, TPS61261DRVR pinout, TPS61261DRVR application, or TPS61261DRVR equivalent, key selection criteria include its 3.3-V fixed output, programmable average output current (10–100 mA), WSON-6 package thermal performance (RθJA = 89°C/W), and compatibility with high-impedance batteries requiring advanced softstart and undervoltage lockout.
Technical Context
The TPS61261DRVR implements a current-mode, quasi-fixed-frequency (2.5 MHz) PWM controller with synchronous rectification using three internal N-channel MOSFETs. Its dual-loop regulation simultaneously manages output voltage (via FB pin sensing 500 mV reference) and average output current (via RI pin resistor programming), selecting the lower-power demand mode dynamically.
It integrates input feedforward for fast transient response, Power Save Mode for light-load efficiency (down to 29 µA IQ), output overvoltage protection (4.5 V trip), and undervoltage lockout (0.7 V threshold with 200 mV hysteresis). Shutdown disconnects load from VIN via internal switches, eliminating reverse current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±1% - eliminates external feedback resistors and ensures stable rail for low-power MCUs and sensors. |
| Input Voltage Range | 0.8 V to 4.0 V - supports deep discharge of single alkaline/NiMH cells and direct coin-cell (e.g., CR2032) operation. |
| Max Output Current | 100 mA at VIN > 1 V - sufficient for driving white LEDs, RF transceivers, or small displays without external current limiting. |
| Switching Frequency | Quasi-fixed 2.5 MHz - enables use of tiny 4.7-µH inductors and 10-µF ceramic capacitors for compact PCB layouts. |
| Quiescent Current | 29 µA - minimizes battery drain in standby, extending shelf life in always-on medical or sensor nodes. |
| Thermal Resistance | RθJA = 89°C/W (WSON-6) - supports 100-mA operation at ambient up to 85°C with minimal heatsinking. |
| Shutdown Current | 0.3 µA max - ensures near-zero battery leakage when disabled, critical for long-term storage applications. |
Pinout & Package
TPS61261DRVR is housed in a thermally enhanced 2.00 mm × 2.00 mm, 6-pin WSON (DRV) package with an exposed thermal pad soldered to GND for optimal power dissipation and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RI (Pin 1) | Average output current programming input | Connects to GND via resistor (2–20 kΩ) to set regulated output current from 10 mA to 100 mA; enables inductor size reduction. |
| EN (Pin 2) | Enable control input | Active-high logic input; drives device into full shutdown (0.3 µA ISD) and disconnects load from VIN when low. |
| FB (Pin 3) | Feedback sense node | Internally connected to 3.3-V divider; must be shorted to VOUT for fixed-output operation - no external resistors required. |
| VOUT (Pin 4) | Regulated boost output | Delivers stable 3.3-V supply; includes overvoltage protection (4.5 V clamp) and supports pre-biased start-up. |
| L (Pin 5) | Inductor connection | High-side switch node; connects directly to inductor (e.g., 4.7 µH); requires low-ESR ceramic output capacitor (10 µF). |
| VIN (Pin 6) | Input supply for control stage | Accepts 0.8–4.0 V; includes UVLO (0.7 V) with 200-mV hysteresis to prevent brownout oscillation during battery depletion. |
| Exposed Thermal Pad | Ground and thermal interface | Must be soldered to PCB GND plane to achieve RθJA = 89°C/W and ensure reliable 100-mA continuous operation. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Softstart | Gradually ramps output current to programmed value during startup - prevents inrush into pre-biased outputs and avoids input voltage sag on high-impedance coin cells. |
| Synchronous 3-Switch Topology | Enables true load disconnect during shutdown and linear-mode startup when VIN > VOUT - eliminates reverse current and improves system safety. |
| Programmable Average Output Current | 10–100 mA via single RI-to-GND resistor - allows precise current limiting for LED drivers or sensor biasing without external circuitry. |
| Power Save Mode | Reduces switching frequency and disables non-essential blocks below ~20 mA load - maintains >85% efficiency down to 100-µA output power. |
| Output Overvoltage Protection | Shuts down power stage if VOUT exceeds 4.5 V - protects downstream 3.3-V logic from fault-induced damage during open-feedback or transient events. |
Applications
| Personal Medical Devices | Wireless Headsets |
|---|---|
Use Scenario: Portable glucose meters and digital thermometers powered by single CR2032 coin cells with strict 10-year shelf-life requirements. IC Role / Device Role / Timing Role: Primary 3.3-V power rail generator that starts reliably at 0.8 V and maintains regulation while battery discharges to end-of-life. Use Value: 29-µA quiescent current and load disconnect in shutdown extend battery shelf life; programmable current limits sensor biasing without extra components. | Use Scenario: Bluetooth earbuds requiring compact, efficient 3.3-V supply from a single NiMH cell (1.2 V nominal) with dynamic load steps during audio playback. IC Role / Device Role / Timing Role: Synchronous boost regulator delivering stable 3.3 V to BLE SoC and audio codec under pulsed 50–100 mA loads. Use Value: 2.5-MHz operation enables miniature 4.7-µH inductor; Power Save Mode sustains >90% efficiency at idle current (<1 mA), maximizing talk time. |
| Industrial Metering Equipment | LED Driver for Low-Power Indicators |
Use Scenario: Handheld multimeters and gas detectors using alkaline AA/AAA cells in cold environments (–40°C to +85°C operating range). IC Role / Device Role / Timing Role: Main power converter providing regulated 3.3 V to microcontroller, ADC, and display driver across wide temperature and input voltage ranges. Use Value: Undervoltage lockout (0.7 V) with 200-mV hysteresis prevents erratic reset behavior during battery recovery; WSON-6 package withstands reflow and vibration. | Use Scenario: Status indicator LEDs in battery-operated IoT sensors where brightness must remain consistent as battery voltage drops from 1.5 V to 0.9 V. IC Role / Device Role / Timing Role: Constant-current LED driver using programmable average output current (e.g., 20 mA) with fixed 3.3-V headroom. Use Value: RI pin programming sets precise LED current without sense resistor; synchronous topology ensures >92% efficiency even at 0.9-V input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61291DRVR | Lower 0.7-V min input, 300-mA output, 1.2-MHz switching, different pinout (RI not present), no programmable current limit | Targets higher-current, lower-VIN apps (e.g., LiSOCl₂ primary cells); lacks current regulation for LED/sensor biasing | Select when >100 mA is needed and current regulation is unnecessary; verify PCB layout compatibility due to different pin assignment. |
| MAX17222ELT+T | 0.4-V min input, 100-mA output, 2-MHz switching, fixed 3.3-V output, no RI pin, higher 40-µA IQ | Optimized for ultra-low-VIN (e.g., energy harvesting), but less efficient below 1 mA due to higher quiescent current | Prefer for sub-0.8-V sources; avoid where 29-µA IQ and programmable current are critical for battery longevity. |
Compared with TPS61261DRVR, TPS61291DRVR offers higher output current but sacrifices programmable current limiting and pin compatibility, while MAX17222ELT+T extends input range downward at the cost of quiescent current and design flexibility - making TPS61261DRVR optimal for coin-cell and single-cell alkaline/NiMH systems demanding precision current control and minimal standby drain.
Availability
TPS61261DRVR is available at Aetrix Electronics and suitable for personal medical devices, wireless headsets, industrial metering equipment, and LED indicator systems requiring stable component supply across extended product lifecycles and varying battery chemistries.
Supply support for TPS61261DRVR 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 battery-powered applications.
The TPS6126x product line was engineered specifically for ultra-low-input-voltage boost conversion in space- and energy-constrained portable electronics - emphasizing high efficiency at light loads, robust startup from depleted batteries, and integration of protection features like load disconnect and OVP.
FAQ
What is the minimum input voltage required for TPS61261DRVR to start up and regulate?
The TPS61261DRVR has a startup undervoltage lockout threshold of 1.2 V (typical) when junction temperature is between –40°C and 105°C. Below this, the device remains disabled. However, once started, it continues regulating down to 0.8 V input - enabling operation through deep discharge of alkaline or NiMH cells. This two-threshold behavior ensures reliable startup while maximizing usable battery capacity.
Does TPS61261DRVR require external feedback resistors to set its output voltage?
No, TPS61261DRVR does not require external feedback resistors. It is a fixed-output variant with an internally trimmed resistor divider that regulates VOUT to 3.3 V ±1%. The FB pin must be connected directly to VOUT (shorted), unlike the adjustable TPS61260. This simplifies layout, reduces BOM count, and improves accuracy by eliminating resistor tolerance and temperature drift effects.
How is average output current programmed on TPS61261DRVR?
Average output current on TPS61261DRVR is programmed by connecting a resistor (R3) between the RI pin (Pin 1) and GND. With R3 = 10 kΩ, the device delivers ~20 mA; values from 2 kΩ to 20 kΩ yield 100 mA to 10 mA respectively. The relationship follows IOUT ≈ 2000/R3 (in mA, with R3 in kΩ). This feature enables precise current setting for LED biasing or sensor excitation without external current-sense amplifiers.
What happens to the load during TPS61261DRVR shutdown?
During shutdown (EN = LOW), TPS61261DRVR actively disconnects the load from VIN using its internal 3-switch synchronous topology. Unlike basic boost converters, it prevents reverse current flow from VOUT back to VIN - protecting the battery and ensuring the output voltage collapses safely. This is critical in systems where VOUT may be pre-biased or connected to other rails.
Can TPS61261DRVR operate with a pre-biased output voltage?
Yes, TPS61261DRVR supports monotonic start-up into a pre-biased output. When enabled, it gradually ramps output current while monitoring VOUT, avoiding output voltage overshoot or instability - essential in systems where VOUT is shared with other regulators or retains charge after power-down. This capability is enabled by its advanced softstart architecture and current-mode control loop.
TPS61261DRVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.8V
- Voltage - Input (Max):
- 4V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 100mA
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (2x2)
TPS61261DRVR FAQ
1.How can I place an order for TPS61261DRVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61261DRVR 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 TPS61261DRVR reliable?
The price and inventory of TPS61261DRVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61261DRVR is usually 5 days.
3.What payment methods are accepted for TPS61261DRVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61261DRVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61261DRVR?
TPS61261DRVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61261DRVR 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 TPS61261DRVR?
For technical support, including TPS61261DRVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61261DRVR requirements.
6.How does Aetrix verify that TPS61261DRVR is sourced from the original manufacturer or authorized distributors?
All TPS61261DRVR 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 TPS61261DRVR meets industry standards.
7.What is the process for return or replacement of TPS61261DRVR?
All TPS61261DRVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61261DRVR, 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 TPS61261DRVR part is unused and in its original packaging.
Return procedure for TPS61261DRVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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