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Texas Instruments TPS61256YFFT
- Part No.:
- TPS61256YFFT
- Manufacturer:
- Texas Instruments
- Package:
- 9-UFBGA, DSBGA
- Datasheet:
-
TPS61256YFFT.pdf
- Description:
- IC REG BOOST 5V 2.4A 9DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:748
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Product details
Overview
TPS61256YFFT from Texas Instruments is a 3.5-MHz synchronous step-up DC-DC converter in 9-pin NanoFree™ DSBGA packaging, delivering up to 900 mA output current at 5.0 V with input as low as 2.65 V. It features ±2% DC output voltage accuracy, 93% peak efficiency, and supports USB charging ports and audio power amplifiers in space-constrained portable devices.
For engineers reviewing the TPS61256YFFT datasheet, TPS61256YFFT pinout, TPS61256YFFT application, or TPS61256YFFT equivalent, key selection criteria include its 21-µA standby quiescent current, VIN ≥ VOUT operation capability, light-load PFM mode, true load disconnect during shutdown, and compatibility with low-cost chip-scale inductors and capacitors in <25 mm² total solution size.
Technical Context
The TPS61256YFFT employs valley-current-mode control with quasi-constant on-time PWM for stable regulation across line and load variations. Its integrated high-side (170 mΩ) and low-side (100 mΩ) MOSFETs enable synchronous rectification and efficient boost conversion from 2.65 V to 5.5 V input, supporting fixed 5.0 V output with ±2% DC accuracy.
It operates in three distinct functional modes: boost mode (EN = HIGH, BP = GND), standby mode (EN = LOW, BP = VIN) delivering up to 150 mA pre-biased output with 21 µA IQ, and true shutdown (EN = LOW, BP = GND) with <1 µA input current. Thermal shutdown activates at 140°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V with ±2% total DC accuracy over temperature and load - ensures stable USB-compliant 5 V rail without external feedback. |
| Max Output Current | 900 mA continuous at VOUT = 5.0 V, VIN ≥ 3.3 V - sufficient for mono/stereo APA and USB 5 V port power delivery. |
| Switching Frequency | 3.5 MHz nominal - enables use of sub-1 µH inductors and small ceramic capacitors for ultra-compact layout. |
| Quiescent Current | 21 µA in standby mode (EN = LOW, BP = VIN) - extends battery life during audio amplifier biasing without full system wake-up. |
| Input Voltage Range | 2.65 V to 4.85 V - supports Li-ion batteries down to near end-of-discharge while maintaining regulated 5 V output. |
| Efficiency | 93% peak at 3.5 MHz - minimizes thermal rise and maximizes runtime in thin mobile form factors. |
| Shutdown Current | 0.85–5.0 µA - preserves battery charge during long-term storage or deep sleep states. |
Pinout & Package
TPS61256YFFT uses a 9-pin DSBGA (NanoFree™) package measuring 1.206 mm × 1.306 mm, optimized for minimal PCB footprint and thermal performance (RθJA = 108.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BP (C3) | Bypass/Mode Select | Configures functional state when EN = LOW: HIGH → standby mode (150 mA pre-biased output, 21 µA IQ); LOW → true shutdown (<1 µA). |
| EN (B3) | Enable Control | Active-high digital input; must be terminated - drives internal logic to activate or disable switching regulator core. |
| GND (C1, C2) | Power Ground | Dual ground pins reduce impedance and improve EMI performance; require low-inductance connection to PCB ground plane. |
| SW (B1, B2) | Switch Node | Drain connection of internal high-side and low-side MOSFETs - interfaces directly to external inductor and requires tight layout for EMI control. |
| VIN (A3) | Input Supply | Accepts 2.65–4.85 V battery input; includes under-voltage lockout (2.1 V threshold, 0.1 V hysteresis) to prevent erratic startup. |
| VOUT (A1, A2) | Regulated Output | Delivers fixed 5.0 V with ±2% accuracy; dual pins lower output impedance and support high-pulse-current loads like audio amplifiers. |
Key Features
| Feature | Design Value |
|---|---|
| Light-load PFM mode | Reduces quiescent current to 37 µA typical during low-output-current operation - extends battery life in idle or background audio scenarios. |
| Selectable standby mode | Enables 150 mA pre-biased output at VIN level with only 21 µA IQ - powers audio amplifiers without full regulator activation. |
| True load disconnect | Removes VOUT from VIN path during shutdown (BP = LOW) - prevents reverse current leakage and protects downstream circuitry. |
| Only three external components | Requires just one inductor (0.7–2.9 µH), one input capacitor (≥3.5 µF), and one output capacitor (≥3.5 µF) - simplifies BOM and reduces assembly cost. |
| Thermal & overload protection | Integrated thermal shutdown (140°C) and valley-current limiting (2150 mA typical) - ensures robust operation under fault or transient overload conditions. |
Applications
| Cell Phone Power Management | USB Charging Port Supply |
|---|---|
|
Use Scenario: Boosting single-cell Li-ion (2.65–4.85 V) to stable 5.0 V for baseband processor, display backlight, or camera module. IC Role / Device Role / Timing Role: Primary step-up regulator providing regulated 5 V rail with fast transient response and low quiescent current. Use Value: Enables full functionality down to 2.65 V battery voltage while maintaining 93% efficiency and <25 mm² solution size. |
Use Scenario: Delivering compliant 5 V/500 mA+ output from portable battery packs or power banks to USB peripherals. IC Role / Device Role / Timing Role: Fixed-output boost converter acting as USB host port power source with built-in current limiting and thermal safety. Use Value: Supports USB 2.0 charging specification with 900 mA continuous output and ±2% voltage accuracy under varying load and temperature. |
| Smartphone Audio Amplifier Bias | Mono/Stereo APA Power |
|
Use Scenario: Providing pre-biased 5 V supply to Class D or Class AB audio amplifiers during playback without full regulator switching. IC Role / Device Role / Timing Role: Standby-mode power source delivering up to 150 mA at VIN-level voltage with 21 µA IQ. Use Value: Reduces system power consumption by >50% vs. active boost mode during audio playback, extending talk time. |
Use Scenario: Powering mono or stereo audio power amplifiers (APA) in compact wearables or Bluetooth speakers. IC Role / Device Role / Timing Role: High-efficiency, small-footprint boost IC supplying clean 5.0 V rail with low output ripple (≤50 mVpk in PFM mode). Use Value: Delivers 900 mA continuous output in <25 mm² area, enabling slim designs without compromising audio performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61253YFFT | Same 5.0 V output but rated for 1000 mA continuous (VIN ≥ 3.3 V) and 1500 mA peak - higher current capability with identical package and pinout. | Preferred for USB ports requiring >900 mA or pulsed 1500 mA loads; shares same PCB layout but requires verification of thermal margin at higher load. | Select TPS61253YFFT if peak current demand exceeds 900 mA; otherwise TPS61256YFFT offers optimal balance of size, efficiency, and cost for 900 mA apps. |
| TPS61258YFFT | 4.5 V fixed output, 1500 mA peak capability, same 3.5 MHz operation and DSBGA package - differs in output voltage and current rating. | Suitable for 4.5 V systems (e.g., certain APA ICs or legacy USB variants); not drop-in for 5.0 V designs without feedback or regulator adjustment. | Choose TPS61258YFFT only when 4.5 V output is required; TPS61256YFFT remains optimal for standard 5.0 V USB/audio applications. |
Compared with TPS61253YFFT and TPS61258YFFT, the TPS61256YFFT provides the most precise fit for 5.0 V, 900 mA portable power applications - offering identical package and control interface while optimizing efficiency and thermal performance at its target load point without overdesigning current capability.
Availability
TPS61256YFFT is available at Aetrix Electronics and suitable for cell phone power management, USB charging port design, and audio amplifier biasing requiring stable component supply, consistent lead times, and full traceability.
Supply support for TPS61256YFFT 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 and embedded processing technologies, with decades of expertise in power management ICs for portable and battery-powered systems.
The TPS6125x family was designed specifically for ultra-compact, high-efficiency boost conversion in smartphones and wearables - prioritizing minimal solution size, low quiescent current, and robust protection in chip-scale packaging.
FAQ
What is the maximum continuous output current supported by the TPS61256YFFT?
The TPS61256YFFT supports up to 900 mA continuous output current at 5.0 V when input voltage is ≥3.3 V. This rating is validated per TI's datasheet under PFM/PWM operation with 2.65 V ≤ VIN ≤ 4.85 V and ambient temperatures from –40°C to 85°C. Peak current capability is not specified for this variant beyond the 900 mA continuous limit.
Does the TPS61256YFFT support true load disconnect during shutdown?
Yes - the TPS61256YFFT provides true load disconnect when configured with EN = LOW and BP = LOW. In this state, the internal switches isolate VOUT from VIN, reducing input current to <1 µA (typical) and preventing reverse current flow into the battery, which is critical for system safety and battery longevity.
What is the recommended inductor value for the TPS61256YFFT?
The TPS61256YFFT is optimized for inductors between 0.7 µH and 2.9 µH, with 1.0 µH being the nominal value specified in TI's typical application circuit. A 1.0 µH, 2.5 A saturation-current chip inductor (e.g., 0603 or 0805 case) ensures stable operation across the full load range while maintaining <25 mm² total solution size.
How does the standby mode function on the TPS61256YFFT?
In standby mode (EN = LOW, BP = VIN), the TPS61256YFFT biases VOUT to VIN level with up to 150 mA output current capability while drawing only 21 µA quiescent current. This mode is ideal for pre-biasing audio amplifiers or other circuits needing low-power, non-switching supply - eliminating switching noise and minimizing battery drain.
Is the TPS61256YFFT pin-compatible with other devices in the TPS6125x family?
Yes - all TPS6125x devices, including TPS61256YFFT, share identical 9-pin DSBGA (YFF) packaging, pin configuration, and pin functions. This allows direct PCB reuse across variants (e.g., TPS61253, TPS61254, TPS61258) when only output voltage or current rating differs, simplifying design flexibility and second-sourcing.
TPS61256YFFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-UFBGA, DSBGA
- 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):
- 2.5V
- Voltage - Input (Max):
- 4.85V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 2.4A (Switch)
- Frequency - Switching:
- 3.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-DSBGA
TPS61256YFFT FAQ
1.How can I place an order for TPS61256YFFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61256YFFT 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 TPS61256YFFT reliable?
The price and inventory of TPS61256YFFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61256YFFT is usually 5 days.
3.What payment methods are accepted for TPS61256YFFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61256YFFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61256YFFT?
TPS61256YFFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61256YFFT 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 TPS61256YFFT?
For technical support, including TPS61256YFFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61256YFFT requirements.
6.How does Aetrix verify that TPS61256YFFT is sourced from the original manufacturer or authorized distributors?
All TPS61256YFFT 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 TPS61256YFFT meets industry standards.
7.What is the process for return or replacement of TPS61256YFFT?
All TPS61256YFFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61256YFFT, 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 TPS61256YFFT part is unused and in its original packaging.
Return procedure for TPS61256YFFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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