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Texas Instruments TPS63020DSJR
- Part No.:
- TPS63020DSJR
- Manufacturer:
- Texas Instruments
- Package:
- 14-VFDFN Exposed Pad
- Datasheet:
-
TPS63020DSJR.pdf
- Description:
- IC REG BUCK BST ADJ 3.5A 14VSON
- Quantity:
- Payment:
- Shipping:
Inventory:615
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Product details
Overview
TPS63020DSJR from Texas Instruments is a high-efficiency, single-inductor buck-boost DC/DC converter IC designed for battery-powered systems requiring stable output voltage across wide input ranges. It supports 1.8 V to 5.5 V input, delivers adjustable 1.2 V to 5.5 V output (typically configured for 3.3 V), sustains up to 2 A continuous output current at VIN > 2.5 V, and operates with 2.4 MHz fixed-frequency PWM or power-save mode. It is used in portable data terminals, IP network cameras, and e-cigarette power supplies.
For engineers reviewing the TPS63020DSJR datasheet, TPS63020DSJR pinout, TPS63020DSJR application, or TPS63020DSJR equivalent, key selection criteria include its average-current-mode control architecture, dual-ground (GND/PGND) isolation, 4-A internal switch current limit, power-good (PG) open-drain signal, and VSON-14 (3 mm × 4 mm) thermal-pad package compatibility with high-density PCB layouts.
Technical Context
The TPS63020DSJR implements an average current mode control topology with input/output voltage feed-forward for fast transient response. Its four-NMOS synchronous switch architecture enables seamless automatic transition between buck and boost modes - no external mode selection required - while minimizing RMS current in the inductor and switches near VIN ≈ VOUT.
It integrates undervoltage lockout (1.5 V threshold on VINA), overtemperature protection (140 °C trip with 20 °C hysteresis), overvoltage protection (7 V clamp), and load disconnect during shutdown. The PS/SYNC pin enables power-save mode (25 µA quiescent current) or external clock synchronization via PLL, supporting frequency locking from 2.2 MHz to 2.6 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 5.5 V - supports single-cell Li-ion, two/three-cell alkaline/NiMH, and supercapacitor inputs down to 2 V under load |
| Output Voltage Range | Adjustable 1.2 V to 5.5 V - set via external resistor divider on FB pin; TPS63020 variant has no internal feedback divider |
| Max Output Current | 2 A continuous at VIN > 2.5 V, VOUT = 3.3 V - limited by 4-A average switch current rating and thermal design |
| Switching Frequency | 2.4 MHz typical - fixed-frequency PWM operation; synchronizable ±200 kHz via PS/SYNC pin |
| Quiescent Current | 25 µA in power-save mode - enables ultra-low standby power for battery longevity in always-on devices |
| Feedback Reference | 500 mV ±5 mV - precise internal reference enables ≤0.5% load/line regulation accuracy |
| Thermal Protection | 140 °C shutdown with 20 °C hysteresis - prevents thermal runaway during sustained overload or poor heatsinking |
Pinout & Package
The TPS63020DSJR is housed in a 14-pin VSON package (DSJ) measuring 3 mm × 4 mm with an exposed thermal pad connected to PGND. This thermally enhanced layout supports high-power density designs and requires PCB copper pour under the thermal pad for optimal junction-to-board thermal resistance (RθJB = 17 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA (Pin 1) | Control-stage supply | Provides bias for internal logic and error amplifier; must be decoupled with 100 nF capacitor |
| GND (Pin 2) | Logic ground reference | Reference for EN, PS/SYNC, FB, and PG signals; separate from PGND to avoid noise coupling |
| FB (Pin 3) | Output voltage feedback | Connects to resistor divider for adjustable output; tied directly to VOUT for fixed-output variants (not applicable to TPS63020) |
| VOUT (Pins 4, 5) | Power output | High-current output node; dual pins reduce IR drop and improve current sharing in high-load applications |
| L2 (Pins 6, 7) | Inductor connection (boost path) | Connects to one end of coupled inductor; paired with L1 to form buck-boost energy transfer path |
| L1 (Pins 8, 9) | Inductor connection (buck path) | Connects to other end of coupled inductor; dual pins minimize parasitic inductance in switching loop |
| VIN (Pins 10, 11) | Power-stage input | High-current input for power switches; dual pins reduce conduction loss and thermal stress |
| EN (Pin 12) | Enable control | Active-high digital enable; must not be left floating; pulls device into shutdown with <1 µA leakage |
| PS/SYNC (Pin 13) | Mode control / sync input | Low = power-save mode enabled; high = forced PWM; external clock input for synchronization |
| PG (Pin 14) | Power-good indicator | Open-drain output asserting low when VOUT is within ±5% regulation window; requires external pull-up |
| PGND (Thermal Pad) | Power ground return | Exposed pad tied internally to all power-switch sources; must be soldered to large PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Average current mode control | Enables fast load transient response and stable operation across buck/boost boundary without external compensation |
| Dynamic current limiting | Reduces switch current limit as VIN drops below 2.3 V or die temperature rises above 125 °C - protects weak batteries and prevents thermal failure |
| Soft-start with short-circuit detection | Ramps current limit from 400 mA to full scale as VOUT reaches 1.2 V; holds low current if VOUT fails to rise - avoids damage during output shorts |
| Load disconnect in shutdown | Internally opens power path between VIN and VOUT during EN = low - eliminates battery drain and backfeed risks |
| Integrated overvoltage protection | Clamps output to 7 V if FB loop fails - safeguards downstream circuitry without external components |
Applications
| Portable Data Terminal Power | IP Network Camera Supply |
|---|---|
Use Scenario: Powers barcode scanner and display in handheld EPOS terminals using single-cell Li-ion battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Buck-boost regulator maintaining stable 3.3 V rail despite battery voltage sagging below 3.0 V during peak transmit bursts. Use Value: Enables uninterrupted operation down to 1.8 V input, extending usable battery life by 25% versus fixed-buck solutions. | Use Scenario: Supplies image sensor, ISP, and Wi-Fi SoC in outdoor IP cameras powered by 3.7 V Li-ion or 5 V USB. IC Role / Device Role / Timing Role: Voltage stabilizer delivering regulated 3.3 V with <10 µs transient recovery - critical for noise-sensitive analog imaging blocks. Use Value: 2.4 MHz switching allows use of small 1.5 µH inductor and compact 22 µF ceramic output caps, reducing board area by 40%. |
| E-Cigarette Battery Management | SSD Supercapacitor Backup |
Use Scenario: Regulates output to 3.3 V for microcontroller and OLED display in rechargeable e-cigarette devices with 3.2–4.2 V battery range. IC Role / Device Role / Timing Role: High-efficiency power converter enabling >90% efficiency across 10 mA–2 A load range - minimizes heat in sealed plastic housing. Use Value: 25 µA quiescent current extends shelf life to >12 months; PG signal triggers low-battery warning before cutoff. | Use Scenario: Provides backup power to enterprise SSD during main rail failure, charged from 5 V system rail via supercapacitor. IC Role / Device Role / Timing Role: Bidirectional-capable buck-boost controller charging supercap and discharging to maintain 3.3 V during brownout events. Use Value: Seamless transition between charge/discharge modes preserves data integrity; 4-A switch rating supports rapid supercap recharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63021DSJR | Fixed 3.3 V output; internal feedback divider; identical pinout and package | No external resistor divider needed; slightly lower BOM cost for fixed-VOUT designs | Select when 3.3 V output is sufficient and layout simplicity is prioritized over adjustability |
| MAX77827BEWL+T | 2.5 V to 5.5 V input; 0.6 V to 5.2 V adjustable output; 3.2 MHz switching; 3.5 A switch rating | Higher switching frequency enables smaller magnetics; different pinout and thermal pad configuration | Choose for space-constrained designs needing >2 A output or tighter output voltage tolerance (±1%) |
Compared with TPS63020DSJR, TPS63021DSJR eliminates external feedback resistors but sacrifices output flexibility, while MAX77827BEWL+T offers higher current and frequency at the cost of non-pin-compatible layout redesign and different thermal management requirements.
Availability
TPS63020DSJR is available at Aetrix Electronics and suitable for portable data terminals, IP network cameras, and e-cigarette power management requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for TPS63020DSJR 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.
The TPS6302x product line was engineered for battery-powered portable electronics requiring wide-input, regulated output with minimal external components - targeting applications where input voltage crosses the output setpoint during normal operation.
FAQ
What is the recommended inductor value for TPS63020DSJR in a 3.3 V output design?
The TPS63020DSJR datasheet specifies a 1.5 µH coupled inductor for standard 3.3 V output designs. This value balances ripple current, efficiency, and transient response across the 1.8–5.5 V input range. Using a 1.5 µH inductor with 2×10 µF input and 3×22 µF output capacitors achieves >90% efficiency at 1 A load with 2.4 MHz switching. Deviations require re-evaluation of current limits and thermal performance in the TPS63020DSJR design.
Does TPS63020DSJR support true bidirectional operation for supercapacitor charging and discharging?
The TPS63020DSJR is not a bidirectional converter - it operates unidirectionally from input to output. However, it supports supercapacitor backup applications by regulating output during discharge (VIN = supercap, VOUT = system rail) and can be paired with external charging circuitry. Its automatic buck-boost mode transition and 1.8 V start-up enable reliable discharge down to near-dead battery voltages, making it suitable for backup power hold-up in SSDs and metering systems using TPS63020DSJR.
How does the power-good (PG) signal behave during startup and fault conditions for TPS63020DSJR?
The TPS63020DSJR PG pin is an open-drain output that remains high-impedance until VOUT reaches 95% of target (e.g., 3.135 V for 3.3 V). It then pulls low only if VOUT falls outside ±5% regulation window or if overtemperature/overvoltage faults occur. During startup, PG asserts high after soft-start completes and regulation is confirmed. It does not indicate enable status or switching activity - only valid regulation, making it ideal for processor reset sequencing in TPS63020DSJR-based systems.
Can TPS63020DSJR operate with only one inductor instead of a coupled inductor?
No - the TPS63020DSJR requires a coupled inductor (two windings on same core) as specified in the datasheet. Its 4-switch buck-boost architecture relies on magnetic coupling between L1 and L2 to achieve proper energy transfer in both buck and boost modes. Using discrete inductors breaks the required phase relationship and causes instability, excessive ripple, or failure to regulate. The recommended 1.5 µH coupled inductor (e.g., Coilcraft XAL5030-152MEB) is mandatory for functional TPS63020DSJR operation.
What is the minimum input voltage required for TPS63020DSJR to start switching?
The TPS63020DSJR requires a minimum input voltage of 1.5 V on VINA to initiate startup, per absolute maximum ratings. However, reliable regulation at nominal output (e.g., 3.3 V) begins at 1.8 V input. Below 1.8 V, the device may start but cannot sustain regulation due to reduced switch current limit and increased conduction losses. For applications requiring operation down to 1.5 V, derating output current and verifying thermal performance with TPS63020DSJR is essential.
TPS63020DSJR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-VFDFN Exposed Pad
- 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):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3.5A (Switch)
- Frequency - Switching:
- 2.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-VSON (4x3)
TPS63020DSJR FAQ
1.How can I place an order for TPS63020DSJR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS63020DSJR 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 TPS63020DSJR reliable?
The price and inventory of TPS63020DSJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS63020DSJR is usually 5 days.
3.What payment methods are accepted for TPS63020DSJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS63020DSJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS63020DSJR?
TPS63020DSJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS63020DSJR 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 TPS63020DSJR?
For technical support, including TPS63020DSJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS63020DSJR requirements.
6.How does Aetrix verify that TPS63020DSJR is sourced from the original manufacturer or authorized distributors?
All TPS63020DSJR 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 TPS63020DSJR meets industry standards.
7.What is the process for return or replacement of TPS63020DSJR?
All TPS63020DSJR units undergo pre-shipment inspection (PSI). If there is an issue with TPS63020DSJR, 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 TPS63020DSJR part is unused and in its original packaging.
Return procedure for TPS63020DSJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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