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Texas Instruments TPS62746YFPR
- Part No.:
- TPS62746YFPR
- Manufacturer:
- Texas Instruments
- Package:
- 8-XFBGA, DSBGA
- Datasheet:
-
TPS62746YFPR.pdf
- Description:
- IC REG BUCK PROG 300MA 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:11,312
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Product details
Overview
TPS62746YFPR from Texas Instruments is a high-efficiency, ultra-low-quiescent-current buck converter optimized for single Li-MnO₂ coin-cell operation. It delivers 300 mA output current with 360 nA operating IQ, supports dual programmable outputs (1.2 V and 1.8 V), and integrates a 1-mA/150-Ω VIN switch - enabling precise battery voltage monitoring in wearable health monitors.
For engineers reviewing the TPS62746YFPR datasheet, TPS62746YFPR pinout, TPS62746YFPR application, or TPS62746YFPR equivalent, key selection criteria include its 2.0–5.5 V input range, DCS-Control™ topology for RF-friendly light-load efficiency, automatic no-ripple 100% mode transition, and 1.6 mm × 0.9 mm 8-ball DSBGA package for space-constrained ultra-low-power systems.
Technical Context
The TPS62746YFPR employs TI's DCS-Control™ topology, combining hysteretic and voltage-mode control to achieve seamless PWM-to-PFM transition, <10 µVPP output ripple at light loads, and fast transient response. Its quasi-fixed 1.2 MHz switching frequency enables compact filtering with a 2.2 µH inductor and 10 µF ceramic capacitor.
Functional modes include Power Save Mode (360 nA IQ), auto 100% duty-cycle operation when VIN − VOUT falls below 200 mV (typ), and independent CTRL-gated VIN switch with 150 Ω RDS(ON). The device enters shutdown at 2.0 V UVLO and restarts at 2.15 V, supporting direct coin-cell start-up without external LDO pre-biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.15–5.5 V (operates down to 2.0 V after startup - enables direct Li-MnO₂ coin-cell use) |
| Output Current | 300 mA (supports MCU + BLE radio co-location without thermal derating) |
| Quiescent Current | 360 nA (enables multi-year battery life in always-on wearables) |
| Switching Frequency | 1.2 MHz (typical; enables small 2.2 µH inductor and minimal PCB area) |
| Output Voltage Options | 1.2 V or 1.8 V (selected via VSEL pin - eliminates external feedback resistors) |
| VIN Switch RDS(ON) | 150 Ω (supports 1 mA drive for ADC-based battery sensing with <150 mV drop) |
| Efficiency @ 10 µA | 90% (maintains high conversion efficiency even during sensor sleep cycles) |
Pinout & Package
Package: 1.6 mm × 0.9 mm, 8-ball DSBGA (YFP) - optimized for ultra-thin wearable PCBs with minimal thermal mass and low-profile assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Primary input supply pin; requires 4.7 µF ceramic capacitor placed adjacent for noise suppression |
| SW | Power switch node | Connects internal high-/low-side MOSFETs to external 2.2 µH inductor; critical for EMI layout |
| GND | Power ground | Low-impedance return path shared by input/output capacitors; must be solid copper pour |
| VOS | Feedback & discharge | Regulation sense point; discharges VOUT when disabled - ensures clean power sequencing |
| VSEL | Output voltage select | Digital input setting 1.2 V (low) or 1.8 V (high); dynamically changeable during operation |
| EN | Enable control | Active-high logic input; internal pull-down; must be terminated to avoid floating-induced shutdown |
| CTRL | VIN switch gate | Controls internal 1-mA VIN-to-VINSW switch; internal 2 MΩ GND termination - no external pull required |
| VINSW | VIN switch output | Switched output for battery divider; open when CTRL = low; 25 nA leakage max ensures minimal battery drain |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control™ topology | Enables simultaneous high light-load efficiency (90% @ 10 µA) and fast load transient response (<10 µs recovery) |
| No-ripple 100% mode | Eliminates switching noise when VIN ≈ VOUT - critical for RF-sensitive BLE/Zigbee receivers |
| Integrated VIN switch | 150 Ω RDS(ON), 1 mA drive capability - replaces discrete FET + resistor network for battery monitoring |
| Output voltage discharge | Active VOS-path discharge ensures zero-volt startup and prevents backfeed into powered-down subsystems |
| Ultra-small solution size | <10 mm² total footprint - achieved with 1.6 × 0.9 mm IC, 2.2 µH inductor, and 0402 10 µF capacitor |
Applications
| Fitness Tracker Power Management | Smartwatch Core Rail |
|---|---|
|
Use Scenario: Continuous heart-rate monitoring with optical sensors and BLE transmission bursts every 5 seconds. IC Role / Device Role / Timing Role: Primary DC/DC regulator supplying 1.8 V to MCU and BLE SoC; manages dynamic load transitions between active sensing and deep-sleep states. Use Value: 360 nA quiescent current extends coin-cell lifetime beyond 2 years; DCS-Control™ ensures <50 mV output droop during 100 mA BLE transmit peaks. |
Use Scenario: Multi-rail system where 1.2 V powers display driver IC and 1.8 V powers application processor. IC Role / Device Role / Timing Role: Dual-voltage configurable buck converter enabling dynamic VDD scaling based on UI activity level. Use Value: VSEL pin allows real-time voltage switching - reducing average power by 22% during static watch-face display vs. full CPU load. |
| Wireless Health Sensor Node | Energy-Harvesting IoT Endpoint |
|
Use Scenario: Patch-style ECG sensor harvesting ambient RF energy, storing in supercapacitor, powering intermittent measurement cycles. IC Role / Device Role / Timing Role: Ultra-low-IQ step-down regulator bridging variable harvester output (2.2–5.0 V) to stable 1.2 V MCU rail. Use Value: 2.0 V startup threshold enables operation as harvester voltage rises; 90% efficiency at 10 µA preserves micro-energy harvests. |
Use Scenario: Indoor environmental monitor using indoor light-harvesting cell (2.4–3.6 V) to power temperature/humidity sensor and sub-GHz transmitter. IC Role / Device Role / Timing Role: Primary power converter delivering regulated 1.8 V to sensor interface and RF transceiver during burst transmissions. Use Value: Integrated VIN switch enables accurate harvester voltage telemetry via MCU ADC - no additional BOM cost or layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62743YFPR | Same 8-ball DSBGA package and DCS-Control™ architecture, but fixed 3.3 V output; 400 mA IOUT; higher IQ (500 nA) | Used where fixed higher output voltage is required for legacy sensor interfaces; not suitable for 1.2/1.8 V MCU rails | Select TPS62743YFPR only if 3.3 V output and 400 mA capability outweigh need for programmable voltage and lowest IQ. |
| MAX17050G+T | 2.5–5.5 V input, 300 mA, 800 nA IQ, 1.8 V fixed output; uses hysteresis control; larger 2.0 × 1.6 mm WLP package | Higher IQ reduces battery life in multi-year wearables; lacks VIN switch and 100% mode - less RF-friendly | Choose MAX17050G+T only when pin compatibility with existing MAX170xx designs is mandatory and RF noise sensitivity is low. |
Compared with TPS62746YFPR, TPS62743YFPR offers higher output current but sacrifices voltage flexibility and ultra-low IQ, while MAX17050G+T trades off size, IQ, and RF performance for legacy design continuity - making TPS62746YFPR optimal for new ultra-low-power wearable platforms requiring dual-voltage support and coin-cell longevity.
Availability
TPS62746YFPR is available at Aetrix Electronics and suitable for wearable electronics, fitness trackers, and smart medical patches requiring stable component supply across multi-year production cycles and tight PCB area constraints.
Supply support for TPS62746YFPR 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 focused on analog and embedded processing technologies, serving industrial, automotive, and personal electronics markets with high-reliability, application-optimized ICs.
The TPS62746YFPR belongs to TI's ultra-low-power DC/DC converter product line, designed specifically for battery-operated wearables and energy-harvesting systems where multi-year operation from miniature cells is essential.
FAQ
What is the minimum input voltage required for TPS62746YFPR to start up and maintain regulation?
The TPS62746YFPR starts up at an undervoltage lockout (UVLO) threshold of 2.15 V and can continue regulating down to 2.0 V once operational. This enables reliable startup directly from a fresh CR2032 coin cell (nominal 3.0 V, dropping to ~2.0 V at end-of-life) without external boost circuitry or pre-biasing.
How does the TPS62746YFPR achieve 90% efficiency at only 10 µA output current?
The TPS62746YFPR achieves 90% efficiency at 10 µA through its DCS-Control™ topology operating in Power Save Mode, combined with an ultra-low-power reference (360 nA IQ), high-impedance internal feedback divider, and optimized gate drive. These features minimize static losses while maintaining precise regulation under microampere loads.
Can the output voltage of TPS62746YFPR be changed dynamically during operation?
Yes, the TPS62746YFPR supports dynamic output voltage scaling: pulling the VSEL pin high or low changes the regulated output between 1.2 V and 1.8 V in real time, with no sequencing delay or output glitch. This enables adaptive power management for mixed-voltage SoCs in wearables.
What is the function and maximum current rating of the VINSW pin on the TPS62746YFPR?
The VINSW pin is the output of an integrated 1-mA VIN switch controlled by the CTRL pin. With CTRL = high, it connects VIN to VINSW through a 150 Ω (typ) MOSFET; it delivers up to 1 mA with ≤150 mV drop at 1 mA, enabling direct connection to resistor dividers for battery voltage measurement via MCU ADC - eliminating external components.
Does the TPS62746YFPR include output voltage discharge functionality, and how is it implemented?
Yes, the TPS62746YFPR provides automatic output voltage discharge via the VOS pin. When EN is pulled low or UVLO triggers, an internal MOSFET connects VOUT to GND through VOS, discharging the output capacitor. This ensures zero-volt startup and prevents backfeeding into powered-down peripherals - critical for clean system-level power sequencing.
TPS62746YFPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- DCS-Control™
- Package/Case:
- 8-XFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.15V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V, 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 300mA
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DSBGA
TPS62746YFPR FAQ
1.How can I place an order for TPS62746YFPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62746YFPR 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 TPS62746YFPR reliable?
The price and inventory of TPS62746YFPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62746YFPR is usually 5 days.
3.What payment methods are accepted for TPS62746YFPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62746YFPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62746YFPR?
TPS62746YFPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62746YFPR 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 TPS62746YFPR?
For technical support, including TPS62746YFPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62746YFPR requirements.
6.How does Aetrix verify that TPS62746YFPR is sourced from the original manufacturer or authorized distributors?
All TPS62746YFPR 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 TPS62746YFPR meets industry standards.
7.What is the process for return or replacement of TPS62746YFPR?
All TPS62746YFPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62746YFPR, 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 TPS62746YFPR part is unused and in its original packaging.
Return procedure for TPS62746YFPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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