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Texas Instruments TPS63805YFFT
- Part No.:
- TPS63805YFFT
- Manufacturer:
- Texas Instruments
- Package:
- 15-UFBGA, DSBGA
- Datasheet:
-
TPS63805YFFT.pdf
- Description:
- IC REG BUCK BOOST ADJ 2A 15DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
TPS63805YFFT from Texas Instruments is a high-efficiency, 2-A single-inductor buck-boost DC/DC converter in a 3×5-ball WCSP package (2.3 mm × 1.4 mm). It operates across 1.3 V–5.5 V input and delivers adjustable 1.8 V–5.0 V output with seamless buck/buck-boost/boost mode transitions-enabling stable 3.3 V/2 A supply in smartphones, fingerprint sensors, and RF amplifier rails where input voltage may dip below or rise above VOUT.
For engineers reviewing the TPS63805YFFT datasheet, TPS63805YFFT pinout, TPS63805YFFT application, or TPS63805YFFT equivalent, key selection considerations include its 11-μA quiescent current, true shutdown with load disconnect, integrated soft-start, overvoltage/overtemperature protection, and compatibility with tiny passive components (0.47 µH inductor, single 22 µF output capacitor).
Technical Context
The TPS63805YFFT employs a peak current mode control architecture with four internal synchronous switches, enabling continuous conduction (PWM) and power-save (PFM) modes via MODE pin selection. Its adaptive operation dynamically shifts between buck, buck-boost (3-cycle), and boost topologies based on real-time VIN–VOUT differential-ensuring >90% efficiency across 10 mA–2 A loads at 3.3 V output.
It integrates precise enable thresholding (1.1 V typ.), feedback regulation referenced to 500 mV, and bidirectional current capability for reverse energy transfer. Protection features include input overvoltage lockout (5.66 V typ.), output overvoltage clamping (5.66 V typ.), thermal shutdown (150 °C), and undervoltage lockout with hysteresis (1.7 V rising / 1.25 V falling).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.3 V to 5.5 V - supports Li-ion, Li-poly, and USB-powered systems with brownout resilience down to 1.3 V (startup requires ≥1.8 V) |
| Output Voltage Range | 1.8 V to 5.0 V - programmable via external resistor divider; regulated to ±1% (PWM) or ±3% (PFM) accuracy around 500 mV FB reference |
| Max Output Current | 2 A at VOUT = 3.3 V when VIN ≥ 2.3 V - sustained delivery enabled by 4.5 A peak current limit in buck-boost mode |
| Quiescent Current | 11 μA - enables ultra-low-power standby in always-on sensor nodes without compromising wake-up responsiveness |
| Switching Frequency | 1.4 MHz (buck-boost), 2.1 MHz (boost), 2.7 MHz (buck) - allows compact 0.47 µH inductor and minimizes EMI with fixed-frequency PWM option |
| Thermal Resistance | RΘJA = 78.8 °C/W - enables 2 A operation in 2.3 mm × 1.4 mm WCSP package without forced airflow under typical PCB layout |
| Protection Features | Integrated OVP (5.66 V), UVP (1.25 V falling), thermal shutdown (150 °C), soft-start (0.6 ms ramp), and true shutdown with load disconnect |
Pinout & Package
TPS63805YFFT uses a 3×5-ball wafer-chip-scale package (WCSP) with 0.4 mm pitch and nominal body size of 2.3 mm × 1.4 mm. The package is lead-free, RoHS-compliant, and optimized for minimal PCB footprint and thermal performance (RΘJB = 19.5 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (A2, A3) | Power input supply | Accepts 1.3–5.5 V; connects to 10 µF input capacitor; must be decoupled near package |
| L1 (B2, B3) | Inductor connection (boost side) | Connects to one terminal of 0.47 µH inductor; carries high di/dt during boost phase |
| EN (A1) | Enable control input | Digital enable with 1.1 V typical threshold; must not float; supports RC delay or voltage-divider UVLO configuration |
| GND (C2, C3) | Power ground | Primary return path for high-current switching loops; ties to PGND plane under IC |
| MODE (B1) | PFM/PWM mode select | LOW = automatic PFM for light-load efficiency; HIGH = forced PWM for low ripple and predictable fSW |
| AGND (C1) | Analog ground | Separate low-noise reference for FB and error amplifier; must connect to GND at single point near IC |
| L2 (D2, D3) | Inductor connection (buck side) | Connects to second terminal of shared inductor; carries high di/dt during buck phase |
| VOUT (E2, E3) | Regulated power output | Delivers up to 2 A; connects to 22 µF output capacitor; feeds downstream loads and PG monitoring |
| FB (D1) | Feedback voltage sense | Monitors resistive divider output; regulates VOUT to 500 mV reference; bias current <100 nA |
| PG (E1) | Power good open-drain indicator | Asserts high-Z when VOUT ≥95% target; pulls low when VOUT ≤90%, OVP, or shutdown occurs |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck/buck-boost/boost transition | Eliminates output glitches during VIN crossing VOUT; maintains regulation without external intervention or mode pins |
| True shutdown with load disconnect | Isolates VOUT from VIN and inductor during disable; reduces system standby current to ≤0.6 µA |
| Reverse current capability | Supports controlled energy flow from VOUT to VIN (e.g., battery backup scenarios); peak reverse current –0.75 A |
| Wide output capacitor flexibility | Stable with single 22 µF ceramic cap at ≤4 V output; no minimum ESR requirement simplifies layout |
| Integrated soft-start | 0.6 ms monotonic current limit ramp prevents inrush into large output caps; enables reliable start-up into full load |
Applications
| Smartphone Fingerprint Sensor Supply | RF Power Amplifier Bias Rail |
|---|---|
Use Scenario: Powers capacitive fingerprint sensor IC requiring clean, stable 3.3 V during rapid biometric acquisition cycles with burst current up to 1.8 A. IC Role / Device Role / Timing Role: Primary buck-boost pre-regulator delivering regulated 3.3 V from declining Li-ion cell (3.6 V → 2.8 V) while maintaining <1% load regulation. Use Value: Enables uninterrupted sensor operation across full battery range without voltage droop-induced false rejects or re-scan delays. | Use Scenario: Supplies 3.3 V bias to GaAs pHEMT RF power amplifier in cellular IoT module operating from USB or coin-cell source. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator supporting dynamic PA envelope tracking with <100 ns PG response for rail sequencing. Use Value: Delivers 2 A peak current with <20 mV ripple in forced PWM mode, minimizing AM-to-PM distortion in transmit chain. |
| Telematics System Pre-Regulator | Thermoelectric Cooler (TEC) Driver Supply |
Use Scenario: Generates 3.3 V main logic rail in automotive telematics unit powered by 12 V battery with wide cold-crank transients (4.5 V–16 V). IC Role / Device Role / Timing Role: Input-stage buck-boost converter accepting unregulated 5–12 V input and rejecting line noise before LDO post-regulation. Use Value: Maintains 3.3 V output during 4.5 V cranking dips using 1.3 V minimum VIN capability-preventing ECU reset or GPS loss. | Use Scenario: Provides precision 3.3 V supply to TEC controller IC in optical transceiver module requiring low-noise, reverse-current-capable bias. IC Role / Device Role / Timing Role: Bidirectional buck-boost stage enabling both heating and cooling phases of TEC via controlled reverse current flow. Use Value: Supports ±0.75 A reverse conduction without external circuitry-reducing component count and board space in compact SFP+ modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Lower 1.8-A max output, 2.5-MHz fixed fSW, no reverse current capability, larger 2.5-mm × 2.5-mm QFN package | Suitable for cost-sensitive portable devices without reverse-energy requirements | Select when 2 A output and reverse conduction are non-critical and board area is less constrained |
| MAX20004AATP+ | Higher 3-A rating, 2.2-MHz fSW, integrated MOSFETs with lower RDS(on), but requires external compensation and lacks PFM mode | Better for high-current industrial sensors needing tighter load regulation and higher thermal margin | Choose when >2 A continuous load or <0.3% load regulation is required, and design resources support loop tuning |
Compared with TPS63805YFFT, TPS63020DSJR trades output current and reverse capability for lower cost and simpler layout, while MAX20004AATP+ offers higher current and efficiency at the expense of design complexity and absence of auto-mode transition.
Availability
TPS63805YFFT is available at Aetrix Electronics and suitable for smartphone biometric modules, RF amplifier bias rails, and automotive telematics systems requiring stable component supply with guaranteed long-term manufacturability and consistent electrical specifications.
Supply support for TPS63805YFFT 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and personal electronics markets.
The TPS63805YFFT belongs to TI's high-efficiency buck-boost converter product line, engineered specifically for space-constrained, battery-powered applications where input voltage varies widely relative to the required output rail.
FAQ
What is the minimum input voltage required for TPS63805YFFT to start up?
The TPS63805YFFT requires a minimum input voltage of 1.8 V to initiate startup. Once operational, it continues regulating down to 1.3 V input-making it suitable for deep-discharge battery applications. This behavior is enforced by an undervoltage lockout (UVLO) circuit with 1.7 V rising threshold and 1.25 V falling hysteresis, ensuring reliable turn-on and hold-on across battery discharge curves.
Can TPS63805YFFT operate with only a single 22 µF output capacitor?
Yes, TPS63805YFFT is fully stable with a single 22 µF ceramic output capacitor for all output voltages ≤4 V-including the common 3.3 V configuration. The device's control architecture and wide output capacitance tolerance eliminate ESR requirements, allowing use of small 0603/0805 MLCCs placed directly at the VOUT and AGND pins to minimize loop inductance and improve transient response.
How does the MODE pin affect TPS63805YFFT efficiency and ripple performance?
When MODE is pulled LOW, TPS63805YFFT enters Power Save Mode (PFM), skipping pulses at light loads to maintain >85% efficiency down to 10 mA. When MODE is HIGH, it forces continuous PWM operation-delivering lower output voltage ripple (<10 mVPP) and predictable 2.1–2.7 MHz switching frequency, ideal for noise-sensitive RF or imaging circuits powered by the TPS63805YFFT.
Does TPS63805YFFT support reverse current flow from VOUT to VIN?
Yes, TPS63805YFFT supports controlled reverse current flow up to –0.75 A average when operating in forced PWM mode (MODE = HIGH). This enables bidirectional energy transfer-for example, powering auxiliary circuits from a charged output capacitor during VIN interruption, or driving thermoelectric coolers in both heating and cooling directions without external H-bridge components.
What protection features are integrated into TPS63805YFFT?
TPS63805YFFT integrates six core protections: (1) input overvoltage lockout (5.66 V), (2) output overvoltage clamping (5.66 V), (3) thermal shutdown (150 °C with 20 °C hysteresis), (4) undervoltage lockout with hysteresis, (5) integrated soft-start (0.6 ms ramp), and (6) true shutdown with complete load disconnect. All functions operate autonomously without external components, enhancing system reliability in unattended edge devices using the TPS63805YFFT.
TPS63805YFFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 15-UFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 2A
- Frequency - Switching:
- 1.4MHz ~ 2.7MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-DSBGA
TPS63805YFFT FAQ
1.How can I place an order for TPS63805YFFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS63805YFFT 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 TPS63805YFFT reliable?
The price and inventory of TPS63805YFFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS63805YFFT is usually 5 days.
3.What payment methods are accepted for TPS63805YFFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS63805YFFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS63805YFFT?
TPS63805YFFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS63805YFFT 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 TPS63805YFFT?
For technical support, including TPS63805YFFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS63805YFFT requirements.
6.How does Aetrix verify that TPS63805YFFT is sourced from the original manufacturer or authorized distributors?
All TPS63805YFFT 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 TPS63805YFFT meets industry standards.
7.What is the process for return or replacement of TPS63805YFFT?
All TPS63805YFFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS63805YFFT, 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 TPS63805YFFT part is unused and in its original packaging.
Return procedure for TPS63805YFFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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