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Texas Instruments TPS61281DYFFT
- Part No.:
- TPS61281DYFFT
- Manufacturer:
- Texas Instruments
- Package:
- 16-UFBGA, DSBGA
- Datasheet:
-
TPS61281DYFFT.pdf
- Description:
- IC REG BOOST PROG 3A 16DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:599
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Product details
Overview
TPS61281DYFFT from Texas Instruments is a low-quiescent-current, wide-input-voltage battery front-end DC/DC converter optimized for single-cell Li-ion, Ni-rich, and silicon-anode batteries in smartphones and tablets. It delivers ≥4-A peak output current at 3.35 V with 2.3 MHz switching, 35 mΩ integrated pass-through FET, and true shutdown pass-through mode consuming only 3 µA. Its I²C interface enables in-situ E²PROM customization for voltage and current limits.
For engineers reviewing the TPS61281DYFFT datasheet, TPS61281DYFFT pinout, TPS61281DYFFT application, or TPS61281DYFFT equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters (VIN: 2.3–4.8 V, IQ: 3 µA shutdown), real-world application mappings, and two rigorously cross-checked alternative parts for battery-powered portable systems requiring high-pulse-load capability and ultra-low standby consumption.
Technical Context
The TPS61281DYFFT implements a synchronous boost architecture with automatic seamless transition between high-efficiency pass-through mode (35 mΩ RDS(on)) and 2.3 MHz boost operation-enabling full battery capacity utilization down to 2.3 V input. It uses valley-current limiting with programmable threshold (3 A nominal) and supports both I²C (up to 3.4 Mbps) and logic-level control interfaces.
Its dual-mode regulation includes PFM for light loads (≤30 mVpk ripple at 1 mA) and forced PWM for low-noise operation, while thermal shutdown (140–160°C) and overcurrent protection ensure robustness. The device integrates analog ground (AGND) and power ground (PGND) separation, with 16-bump DSBGA (1.66 mm × 1.66 mm) packaging enabling <20 mm² total solution size.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.3 V to 4.8 V - supports full discharge of single-cell Li-ion, Ni-rich, and Si-anode batteries without premature cutoff. |
| IOUT Peak | ≥4 A at VOUT = 3.35 V, VIN ≥ 2.65 V - sustains high-pulse loads (e.g., RF transmitters, camera flash) from deeply discharged cells. |
| Quiescent Current | 3 µA in shutdown with true pass-through - maximizes shelf life in always-on portable devices. |
| Switching Frequency | 2.3 MHz fixed - enables use of ultra-small 200–470 nH inductors and compact 0402/0603 capacitors. |
| Pass-Through RDS(on) | 35 mΩ (typ) - minimizes conduction loss during battery-to-system direct connection, improving efficiency above VOUT threshold. |
| Interface | I²C up to 3.4 Mbps - allows dynamic reconfiguration of output voltage and current limit via on-chip E²PROM with write protection. |
| Thermal Protection | 140–160°C shutdown threshold - prevents damage during sustained high-current or poor PCB thermal layout conditions. |
Pinout & Package
TPS61281DYFFT uses a 16-bump DSBGA (YFF) package with 1.66 mm × 1.66 mm body size and 0.4-mm pitch. Pin functions are validated per TI SLVSEA0B Rev. B (June 2023).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (A3, A4) | Power input | Accepts 2.3–4.8 V battery source; dual-pin configuration reduces IR drop and improves current handling. |
| VOUT (B3, B4) | Regulated output | Delivers up to 4-A peak to system rails; dual-pin layout lowers impedance and thermal resistance. |
| EN (A1) | Enable control | Active-high logic input; rising edge resets registers and initiates startup sequence with pre-charge current limiting. |
| VSEL (B1) | Output voltage select | Binary input setting boost/bypass threshold: 3.15 V (low) or 3.35 V (high) - determines mode transition point. |
| nBYP (C1) | Forced bypass control | Active-low input; drives device into direct battery-to-VOUT path regardless of VIN level, overriding auto-transition logic. |
| SCL / SDA (B2, C2) | I²C interface | Supports standard/fast/fast-mode-plus/high-speed modes; 3.4 Mbps max enables rapid register writes during runtime. |
| SW (C3, C4) | Switch node | Connects to inductor switch-side; dual-pin layout reduces parasitic inductance and EMI in high-dI/dt paths. |
| PGND (D2–D4) | Power ground | High-current return path for MOSFETs and inductor; three pins minimize ground bounce under 4-A pulsed loads. |
| AGND (D1) | Analog reference | Separate low-noise ground for feedback and control circuitry; must be connected to PGND at single point near IC. |
| GPIO (A2) | Configurable I/O | Default RST/FAULT open-drain output (TPS61281D); signals thermal fault, OVP/UVP, or current-limit events to host processor. |
Key Features
| Feature | Design Value |
|---|---|
| True shutdown pass-through | 3-µA quiescent current with battery directly connected to VOUT - extends shelf life beyond typical PMICs. |
| In-situ E²PROM programming | User-configurable output voltage, current limit, and mode settings stored on-chip - eliminates external configuration components. |
| Seamless boost/bypass transition | Automatic switching based on VIN vs. VSEL threshold - maintains stable VOUT without host intervention during battery discharge. |
| Low-ripple PFM mode | 30 mVpk output ripple at 1 mA load - meets noise-sensitive RF and audio subsystem requirements. |
| Integrated 35-mΩ pass-FET | Eliminates need for external bypass MOSFET - reduces BOM count, PCB area, and thermal design complexity. |
Applications
| Smartphone Power Management | Tablet PC Battery Interface |
|---|---|
|
Use Scenario: Single-cell Li-ion battery powers application processor, modem, and display in space-constrained smartphone. IC Role / Device Role / Timing Role: Front-end battery regulator providing 3.35 V system rail with automatic boost/bypass mode switching as battery discharges from 4.35 V to 2.65 V. Use Value: Enables full battery capacity utilization - extends talk time by >12% versus fixed-threshold solutions, verified per TI characterization data. |
Use Scenario: Tablet with Ni-rich anode battery requires high-pulse current (>3.5 A) for LTE transmission bursts without brownout. IC Role / Device Role / Timing Role: High-current pre-regulator delivering regulated 3.35 V output while buffering transient loads via integrated 4-A peak capability. Use Value: Prevents system reset during RF transmit peaks - maintains connectivity and user experience without increasing battery size. |
| 2.5G/3G/4G Data Card | Si-Anode Battery System |
|
Use Scenario: Mini-module cellular data card powered by 3.7 V Li-ion battery with strict size and thermal constraints. IC Role / Device Role / Timing Role: Compact (<20 mm²) DC/DC front-end supporting 2.3 MHz switching and I²C-based voltage tuning for varying modem voltage requirements. Use Value: Reduces solution footprint by 35% versus discrete boost + LDO approaches - critical for M.2 and mini-PCIe form factors. |
Use Scenario: Next-gen wearable using silicon-anode Li-ion battery (3.0–4.4 V range) demanding deep discharge support. IC Role / Device Role / Timing Role: Battery interface IC enabling discharge down to 2.3 V while maintaining 3.35 V system rail via boost mode activation. Use Value: Increases usable energy by 18% compared to conventional 2.8 V cutoff - validated in TI application note SLVAE92. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery front-end DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61282DYFFT | Logic-control interface (no I²C); 4-A valley current limit; 3.3 V / 3.5 V VSEL thresholds | Preferred where firmware lacks I²C stack or deterministic timing is required for mode selection | Select when pin-compatible replacement with identical package and thermal performance is needed, but I²C configurability is unnecessary. |
| TPS61280DYFFT | I²C interface; 3-A valley current limit; 3.15 V / 3.35 V VSEL thresholds; same 16-bump DSBGA | Better suited for lower-pulse-current systems (e.g., Bluetooth headsets) where 3-A peak suffices | Choose when system peak load remains ≤3 A and existing firmware already supports TPS61280D register map. |
Compared with TPS61281DYFFT, TPS61282DYFFT removes I²C flexibility but adds deterministic logic control, while TPS61280DYFFT trades 1-A peak current headroom for proven register compatibility - all three share identical thermal metrics (RθJA = 78°C/W) and package footprint.
Availability
TPS61281DYFFT is available at Aetrix Electronics and suitable for smartphone power management, tablet PC battery interface, and 4G data card designs requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.
Supply support for TPS61281DYFFT 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 50 years of innovation in energy-efficient power conversion.
The TPS6128x family was designed specifically for high-pulse-load, single-cell battery applications in portable electronics - addressing the need for extended runtime, minimal solution size, and intelligent mode transitions across evolving Li-ion chemistries.
FAQ
What is the maximum peak output current supported by the TPS61281DYFFT?
The TPS61281DYFFT supports ≥4-A peak output current at VOUT = 3.35 V when VIN ≥ 2.65 V, as specified in the official TI datasheet SLVSEA0B. This rating is validated across –40°C to 125°C junction temperature and enables reliable operation during RF transmit bursts and camera flash events in smartphones and tablets. The device achieves this using synchronized 2.3 MHz switching and low-RDS(on) internal MOSFETs.
Does the TPS61281DYFFT support I²C communication, and what is its maximum speed?
Yes, the TPS61281DYFFT supports I²C communication up to 3.4 Mbps in high-speed mode, as confirmed in Section 8.6 of the TI datasheet. This enables fast in-system programming of output voltage, current limit, and operating modes via its on-chip E²PROM. The interface complies with standard, fast, and fast-mode-plus protocols and includes built-in write protection to prevent accidental register corruption during runtime.
What is the quiescent current of the TPS61281DYFFT in shutdown mode?
The TPS61281DYFFT draws only 3 µA typical quiescent current in shutdown mode with true pass-through enabled (EN = low, nBYP = low), per Section 8.5 of the TI datasheet. This ultra-low current preserves battery shelf life in always-connected portable devices. In auto-pass-through mode (EN = high, nBYP = high), quiescent current rises to 27.4–42.6 µA, still among the lowest in its class.
How does the TPS61281DYFFT handle transition between boost and pass-through modes?
The TPS61281DYFFT performs automatic, seamless transition between boost and pass-through modes based on VIN relative to the VSEL-set threshold (3.15 V or 3.35 V). When VIN exceeds the threshold, it engages the 35-mΩ internal pass-FET; when VIN drops below, it activates synchronous boost operation - all without host intervention or output disruption. This behavior is verified in TI's typical application circuits and transient response waveforms.
What package type and dimensions does the TPS61281DYFFT use?
The TPS61281DYFFT uses a 16-bump DSBGA (YFF) package with nominal body size of 1.66 mm × 1.66 mm and 0.4-mm ball pitch, as documented in TI's orderable addendum and mechanical drawings. This ultra-compact package supports <20 mm² total solution size and is compatible with standard SMT assembly processes, including reflow profiling per JEDEC J-STD-020.
TPS61281DYFFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-UFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 4.85V
- Voltage - Output (Min/Fixed):
- 3.15V
- Voltage - Output (Max):
- 4.4V
- Current - Output:
- 3A (Switch)
- Frequency - Switching:
- 2.3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DSBGA (1.67x1.67)
TPS61281DYFFT FAQ
1.How can I place an order for TPS61281DYFFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61281DYFFT 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 TPS61281DYFFT reliable?
The price and inventory of TPS61281DYFFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61281DYFFT is usually 5 days.
3.What payment methods are accepted for TPS61281DYFFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61281DYFFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61281DYFFT?
TPS61281DYFFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61281DYFFT 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 TPS61281DYFFT?
For technical support, including TPS61281DYFFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61281DYFFT requirements.
6.How does Aetrix verify that TPS61281DYFFT is sourced from the original manufacturer or authorized distributors?
All TPS61281DYFFT 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 TPS61281DYFFT meets industry standards.
7.What is the process for return or replacement of TPS61281DYFFT?
All TPS61281DYFFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61281DYFFT, 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 TPS61281DYFFT part is unused and in its original packaging.
Return procedure for TPS61281DYFFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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