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Texas Instruments TPS63031DSKT
- Part No.:
- TPS63031DSKT
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TPS63031DSKT.pdf
- Description:
- IC REG BUCK BST 3.3V 900MA 10SON
- Quantity:
- Payment:
- Shipping:
Inventory:1,683
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Product details
Overview
TPS63031DSKT from Texas Instruments is a fixed-output 3.3-V, high-efficiency single-inductor buck-boost DC/DC converter with integrated 1-A switches, operating from 1.8 V to 5.5 V input and delivering up to 800 mA in step-down mode (VIN ≥ 3.6 V) and up to 500 mA in boost mode (VIN ≥ 2.4 V), used in battery-powered portable electronics requiring seamless voltage regulation across varying cell states.
For engineers reviewing the TPS63031DSKT datasheet, TPS63031DSKT pinout, TPS63031DSKT application, or TPS63031DSKT equivalent, key selection considerations include its 3.3-V fixed output, automatic buck-boost transition, power-save mode operation below 100 mA inductor current, 2.4 MHz typical switching frequency, and thermal performance in the 2.5-mm × 2.5-mm VSON-10 package.
Technical Context
The TPS63031DSKT implements an average current-mode control architecture with dual-loop regulation-fast inner current loop and outer voltage loop-with input/output voltage feed-forward for rapid transient response. It uses four internal N-channel MOSFETs in a synchronous 4-switch topology to maintain high efficiency across input voltages both above and below the 3.3-V output.
Operation automatically transitions between buck and boost modes based on VIN–VOUT relationship; no external mode selection is required. The device supports forced fixed-frequency operation or synchronization via the PS/SYNC pin, and includes undervoltage lockout (1.5 V threshold), overtemperature protection (140 °C trip), and load disconnect during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 5.5 V - supports single-cell Li-ion (2.5–4.2 V), two/three-cell alkaline/NiMH (2.4–4.5 V), and wide industrial supply rails. |
| Output Voltage | Fixed 3.3 V ±3% - internally trimmed; FB pin connected directly to VOUT; eliminates external resistor divider and associated tolerance drift. |
| Max Output Current | 800 mA at 3.3 V in step-down (VIN = 3.6–5.5 V); 500 mA at 3.3 V in boost (VIN = 2.4–3.5 V) - defines usable load range under real battery discharge profiles. |
| Switching Frequency | 2.4 MHz typical - enables use of small 1.5-µH inductors and low-ESR ceramic capacitors; reduces solution footprint and improves light-load transient response. |
| Efficiency | Up to 96% - achieved via synchronous rectification and optimized gate drive; critical for extending runtime in portable medical and consumer devices. |
| Quiescent Current | 35 µA typical - enables >10-year shelf life in always-on battery-backed systems; measured at VIN = VINA = 3.6 V, VOUT = 3.3 V, IOUT = 0 mA. |
| Thermal Resistance | RθJA = 60.7 °C/W - requires minimal PCB copper area for thermal relief; RθJC(bot) = 6.3 °C/W enables effective heat transfer through exposed thermal pad to ground plane. |
Pinout & Package
TPS63031DSKT is housed in a 2.5-mm × 2.5-mm, 10-pin VSON package (DSK) with an exposed thermal pad connected to PGND. The package supports tape-and-reel delivery (T suffix = 250 units/reel) and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Power output | Regulated 3.3-V supply node; must be decoupled with ≥10 µF ceramic capacitor close to pin and PGND. |
| L1 (Pin 4) | Inductor connection | Connects to one end of 1.5-µH inductor; carries high-frequency AC current; routing must minimize loop area with PGND. |
| L2 (Pin 2) | Inductor connection | Connects to other end of same inductor; forms buck-boost energy transfer path; shares current stress with L1. |
| VIN (Pin 5) | Main power input | Supplies power stage; accepts 1.8–5.5 V; requires ≥10 µF input capacitance near VIN–PGND. |
| VINA (Pin 8) | Control supply input | Separate supply for logic/control circuitry; must be bypassed with 0.1 µF ceramic to GND; UVLO threshold at 1.5 V. |
| EN (Pin 6) | Enable control | Active-high digital enable; pulls device into full shutdown (<0.9 µA IQ) when low; connects to system power manager or microcontroller GPIO. |
| PS/SYNC (Pin 7) | Mode control | Low = power-save enabled; high = fixed-frequency mode; external clock input synchronizes switching to avoid EMI peaks. |
| FB (Pin 10) | Feedback sense | Internally tied to 3.3-V reference; externally connected to VOUT for fixed-output operation; no external resistors needed. |
| GND (Pin 9) | Logic ground | Reference for EN, PS/SYNC, and control circuits; must connect to PGND at single point near IC to prevent ground bounce. |
| PGND (Pin 3) | Power ground | Return path for high-current switches and inductor; connects to exposed thermal pad; routed separately from GND until single-point tie. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck-boost transition | Seamlessly shifts between step-down and boost topologies without external intervention or output disturbance-critical for stable 3.3-V rail as battery discharges from 4.2 V to 2.4 V. |
| Synchronous 4-switch architecture | Eliminates external diodes and reduces conduction losses; achieves >90% efficiency at 100 mA load while maintaining <50 µA quiescent current in power-save mode. |
| Load disconnect during shutdown | Isolates VOUT from VIN when EN = low-prevents battery drain in standby and avoids back-powering of upstream circuitry in multi-rail systems. |
| Integrated overtemperature protection | Shuts down at 140 °C junction temperature with 20 °C hysteresis-enables reliable operation in compact enclosures without external thermal sensors or firmware monitoring. |
| Separate GND and PGND pins | Prevents control ground noise coupling into power paths; ensures stable feedback and accurate current sensing even under high di/dt switching conditions. |
Applications
| Smartphone Power Management | Portable Medical Monitor |
|---|---|
Use Scenario: Regulating stable 3.3-V supply for baseband processor and RF transceiver from declining single-cell Li-ion battery (4.2 V → 2.5 V). IC Role / Device Role / Timing Role: Primary buck-boost regulator providing uninterrupted 3.3-V rail during deep discharge; handles dynamic load steps up to 600 mA. Use Value: Enables full functionality down to 2.4 V input-extending usable battery capacity by ~12% versus fixed-buck solutions limited to VIN > VOUT. | Use Scenario: Powering glucose meter MCU, LCD backlight driver, and analog front-end from two AA alkaline cells (3.0 V → 1.8 V). IC Role / Device Role / Timing Role: Single-chip power source replacing discrete buck + boost stages; maintains 3.3-V accuracy within ±3% across entire battery life. Use Value: Reduces BOM count by 7 components and PCB area by 35 mm² versus dual-converter approach-critical for handheld form factor. |
| IP Network Camera | Portable Data Terminal |
Use Scenario: Supplying 3.3-V logic and image sensor interface from 3.7-V Li-polymer battery with peak current demands during video streaming. IC Role / Device Role / Timing Role: High-efficiency DC/DC converter supporting burst loads up to 800 mA; enters power-save mode during idle frames to minimize background current. Use Value: Achieves 94% efficiency at 200 mA and 35 µA quiescent current-enabling >14-hour continuous operation on 1200-mAh battery. | Use Scenario: Delivering regulated 3.3-V rail to barcode scanner engine, wireless module, and touch controller in ruggedized handheld terminal. IC Role / Device Role / Timing Role: Main system regulator with robust start-up (1.8 V min), load disconnect, and thermal shutdown-ensuring reliability in field-deployed equipment. Use Value: Withstands cold-temperature battery voltage sag (down to 1.8 V) and prevents brownouts during motor activation-reducing field failure rate by >90% vs. non-UVLO designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63021DSJR | Same 3.3-V fixed output, but 2-MHz switching frequency and 1.2-A switch rating; slightly higher IQ (45 µA); identical DSK package. | Supports higher peak loads (up to 1.2 A) and lower EMI due to reduced switching frequency; less suitable for ultra-low-IQ battery backup. | Select TPS63021DSJR if peak current exceeds 800 mA or EMI-sensitive layout constraints require lower fSW. |
| MAX77827BEWC+T | 3.3-V fixed output, 2.2-MHz fSW, 1.2-A switches, but requires external compensation and lacks integrated power-save mode; WLP-16 package (2.13 mm × 2.13 mm). | Offers tighter output voltage accuracy (±1.5%) and higher max output current, but increases design complexity and board area due to external components. | Choose MAX77827BEWC+T only when ±1.5% VOUT tolerance is mandatory and layout space allows for compensation network. |
Compared with TPS63031DSKT, TPS63021DSJR provides higher current headroom at marginally higher quiescent current, while MAX77827BEWC+T trades integration simplicity for tighter regulation and external tuning flexibility-neither is pin-compatible, and all three require unique PCB layouts.
Availability
TPS63031DSKT is available at Aetrix Electronics and suitable for smartphone power management, portable medical monitors, IP network cameras, and portable data terminals requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for TPS63031DSKT 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 ICs, with decades of expertise in high-efficiency DC/DC conversion and battery-powered system design.
The TPS6303x product line was engineered specifically for space-constrained, battery-operated portable electronics needing seamless voltage regulation across wide input ranges-from fresh alkaline cells to deeply discharged Li-ion batteries-without sacrificing efficiency or reliability.
FAQ
What is the minimum input voltage required for TPS63031DSKT to start up and regulate 3.3 V?
The TPS63031DSKT requires a minimum input voltage of 1.8 V at VINA to initiate startup and maintain regulation at 3.3 V output. Below this threshold, the undervoltage lockout (UVLO) circuit disables operation. Startup is guaranteed at 1.8 V across –40°C to 85°C ambient, with typical turn-on occurring at 1.6 V and hysteresis ensuring clean release above 1.9 V. This enables reliable operation down to nearly-dead alkaline or NiMH cells.
Does TPS63031DSKT require external resistors to set its 3.3-V output?
No, the TPS63031DSKT has a factory-trimmed internal feedback divider that fixes the output at 3.3 V ±3%. The FB pin must be connected directly to VOUT-no external resistors are needed or recommended. This eliminates resistor tolerance errors, temperature drift, and layout sensitivity, ensuring consistent 3.3-V regulation across production lots and environmental conditions. The TPS63030DSKT variant requires external resistors for adjustable outputs.
How does the power-save mode function in TPS63031DSKT, and when is it active?
In TPS63031DSKT, power-save mode activates automatically when the PS/SYNC pin is pulled low. The converter stops switching when average inductor current falls below ~100 mA and VOUT remains at or above nominal 3.3 V. When VOUT drops due to load increase, it resumes operation with controlled soft-start. This mode reduces quiescent current to 35 µA typical, significantly extending battery life in intermittent-use applications like remote controls or sensor nodes where TPS63031DSKT operates mostly at light load.
Can TPS63031DSKT synchronize to an external clock, and what frequency range is supported?
Yes, TPS63031DSKT supports external clock synchronization via the PS/SYNC pin. When driven with a logic-level square wave, the internal PLL locks to frequencies from 2.2 MHz to 2.6 MHz-the same range as its free-running oscillator. The PLL tolerates missing pulses and maintains stable operation, making it suitable for noise-sensitive systems where EMI must be aligned to a system master clock. Synchronization does not affect output voltage accuracy or load regulation performance of TPS63031DSKT.
What thermal management guidance applies to TPS63031DSKT in high-current operation?
For sustained 800-mA output, TPS63031DSKT requires proper thermal design: the exposed thermal pad must be soldered to a solid PGND copper plane with ≥4 thermal vias (0.3-mm diameter) connecting to inner/ground layers. With 2-in² of 1-oz copper on top layer and 1-in² on inner layer, junction-to-ambient rise is ~35°C at 800 mA. Derating is recommended above 70°C ambient; thermal shutdown triggers at 140°C junction with 20°C hysteresis. Layout must separate PGND and GND traces until their single-point connection near Pin 9 to avoid noise coupling into TPS63031DSKT control circuitry.
TPS63031DSKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 900mA (Switch)
- Frequency - Switching:
- 2.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-SON (2.5x2.5)
TPS63031DSKT FAQ
1.How can I place an order for TPS63031DSKT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS63031DSKT 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 TPS63031DSKT reliable?
The price and inventory of TPS63031DSKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS63031DSKT is usually 5 days.
3.What payment methods are accepted for TPS63031DSKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS63031DSKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS63031DSKT?
TPS63031DSKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS63031DSKT 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 TPS63031DSKT?
For technical support, including TPS63031DSKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS63031DSKT requirements.
6.How does Aetrix verify that TPS63031DSKT is sourced from the original manufacturer or authorized distributors?
All TPS63031DSKT 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 TPS63031DSKT meets industry standards.
7.What is the process for return or replacement of TPS63031DSKT?
All TPS63031DSKT units undergo pre-shipment inspection (PSI). If there is an issue with TPS63031DSKT, 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 TPS63031DSKT part is unused and in its original packaging.
Return procedure for TPS63031DSKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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