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Texas Instruments TPS63020DSJT
- Part No.:
- TPS63020DSJT
- Manufacturer:
- Texas Instruments
- Package:
- 14-VFDFN Exposed Pad
- Datasheet:
-
TPS63020DSJT.pdf
- Description:
- IC REG BUCK BST ADJ 3.5A 14VSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,517
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Product details
Overview
TPS63020DSJT from Texas Instruments is a high-efficiency, single-inductor buck-boost DC/DC converter with 4-A internal switches, adjustable output voltage (1.2 V to 5.5 V), 2.4 MHz fixed-frequency operation, and power-good signaling - designed for battery-powered devices requiring stable regulation across wide input ranges including 1.8 V to 5.5 V.
For engineers reviewing the TPS63020DSJT datasheet, TPS63020DSJT pinout, TPS63020DSJT application, or TPS63020DSJT equivalent, key selection criteria include its average current-mode control architecture, dual-ground (GND/PGND) isolation, dynamic current limiting, soft-start behavior, and thermal shutdown with hysteresis - all critical for portable industrial and embedded power designs.
Technical Context
The TPS63020DSJT implements an average current-mode control topology with input/output voltage feed-forward, enabling fast transient response and seamless automatic transition between buck and boost modes. Its four-NMOS switch architecture maintains synchronous rectification across all operating conditions, while separate GND (control) and PGND (power) pins prevent ground shift under high-current switching.
It features integrated overtemperature protection (140°C trip, 20°C hysteresis), overvoltage protection (7 V clamp), undervoltage lockout (1.5 V threshold), and dynamic current limiting that scales with VIN and junction temperature - ensuring robust operation during battery discharge or thermal stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 5.5 V - supports single-cell Li-ion, multi-cell alkaline/NiMH, and supercapacitor sources down to 1.5 V start-up. |
| Output Voltage | Adjustable 1.2 V to 5.5 V via external resistor divider - enables flexible rail generation without redesign. |
| Switch Current Limit | 4 A typical - sustains up to 3 A continuous output current at VOUT = 3.3 V when VIN > 2.5 V. |
| Quiescent Current | 25 µA in power-save mode - extends battery life in low-power standby states. |
| Switching Frequency | 2.4 MHz nominal - allows use of small 1.5 µH inductors and compact ceramic capacitors. |
| Thermal Resistance | RθJA = 41.8°C/W - requires minimal PCB copper area for thermal management in DSJ package. |
| Feedback Reference | 500 mV ±5 mV - enables precise output regulation with standard resistor tolerances. |
Pinout & Package
The TPS63020DSJT is housed in a 14-pin VSON (DSJ) package measuring 3 mm × 4 mm with an exposed thermal pad connected to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA | Control-stage supply | Separate 1.8–5.5 V input for bias circuitry - decouples control logic from power-stage noise. |
| GND | Control ground | Reference for FB, EN, PS/SYNC - must be tied to PGND at single point near GND pin. |
| FB | Voltage feedback input | Connects to resistor divider for adjustable output - sets VOUT = 500 mV × (1 + R1/R2). |
| VOUT | Regulated output | Power delivery node - dual pins (4,5) reduce trace resistance and improve current sharing. |
| L1 / L2 | Inductor connections | Two pairs (pins 6/7, 8/9) support interleaved or split inductor layouts - minimizes ripple current. |
| VIN | Power-stage supply | Dual input pins (10,11) - handle high pulsed currents with low impedance path to PGND. |
| EN | Enable control | Active-high logic input - disables converter and disconnects load from input during shutdown. |
| PS/SYNC | Mode select / sync input | Low = power-save mode; high = forced PWM; clock signal = synchronization to external source. |
| PG | Power-good open-drain | Asserts low when VOUT is within ±5% regulation - provides earliest fault indication for system sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Average current-mode control | Enables fast 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 exceeds 125°C - prevents thermal runaway during weak-source conditions. |
| Soft-start with current ramp | Initial 400 mA current limit ramps to full value only after VOUT reaches ~1.2 V - eliminates inrush current and output overshoot. |
| Load disconnect in shutdown | Internally opens power path between VIN and VOUT - prevents battery drain and backfeed into input rails. |
| Overvoltage protection | Clamps output at 7 V if FB loop fails - protects downstream ICs without external crowbar circuitry. |
Applications
| Portable Data Terminals | IP Network Cameras |
|---|---|
Use Scenario: Battery-powered handheld scanners and EPOS terminals operating from single-cell Li-ion (2.7–4.2 V) with 3.3 V logic and 5 V peripherals. IC Role / Device Role / Timing Role: Primary buck-boost regulator maintaining stable 3.3 V rail during deep battery discharge down to 1.8 V input. Use Value: Enables uninterrupted operation through full battery cycle without manual voltage scaling or secondary regulators. | Use Scenario: Outdoor IP cameras powered by PoE midspan or backup batteries, requiring clean 3.3 V for SoC and 5 V for IR LEDs. IC Role / Device Role / Timing Role: Pre-regulator converting variable 5–57 V PoE or 2.5–4.5 V battery to tightly regulated 3.3 V/5 V outputs. Use Value: Eliminates need for discrete buck + boost stages - reduces BOM count and PCB area while supporting cold-start from depleted batteries. |
| Video Doorbells | Enterprise SSD Backup |
Use Scenario: Battery-operated doorbells with motion-triggered video capture, drawing burst current up to 2 A at 3.3 V. IC Role / Device Role / Timing Role: High-efficiency power manager delivering 3.3 V from 2-cell alkaline (1.8–3.2 V) with dynamic current limit adapting to battery impedance rise. Use Value: Extends usable battery life by 35% vs. fixed-frequency converters due to 25 µA quiescent current and adaptive light-load operation. | Use Scenario: Solid-state drives using supercapacitors to maintain DRAM cache during sudden AC loss. IC Role / Device Role / Timing Role: Bidirectional buck-boost controller charging supercapacitors from 3.3 V rail and discharging them to sustain 3.3 V during power interruption. Use Value: Supports >10-second hold-up time with <100 mV droop using only 3×22 µF output capacitance - no external MOSFETs or controllers required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63021DSJT | Fixed 3.3 V output; identical pinout, package, and control features - no external feedback resistors required. | Suitable where output voltage is static and board space is constrained; eliminates two SMT resistors but loses adjustability. | Select TPS63021DSJT when 3.3 V is the sole required output and design simplicity outweighs flexibility. |
| MP2918DJ-LF-Z | 2.5 A switch current limit; 1.2 MHz switching frequency; no PG output or PS/SYNC pin - simpler interface but less feature-rich. | Better suited for cost-sensitive consumer applications with moderate efficiency requirements and no need for power-good signaling or synchronization. | Choose MP2918DJ-LF-Z only if 2.5 A output and absence of PG/PS/SYNC are acceptable trade-offs for lower unit cost. |
Compared with TPS63020DSJT, TPS63021DSJT offers identical performance with fixed 3.3 V output - simplifying layout but removing voltage flexibility; MP2918DJ-LF-Z provides lower-cost operation at reduced current capability and missing critical system-monitoring features like PG and programmable power-save mode.
Availability
TPS63020DSJT is available at Aetrix Electronics and suitable for portable data terminals, IP network cameras, video doorbells, and enterprise SSD backup systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS63020DSJT 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 90 years of innovation in high-reliability power conversion solutions.
The TPS6302x product line was engineered for battery-powered and energy-harvesting applications demanding high efficiency across wide input voltage ranges - particularly where input can fall below or exceed the required output voltage.
FAQ
What is the minimum input voltage required for TPS63020DSJT to start switching?
The TPS63020DSJT requires a minimum input voltage of 1.5 V on VINA to initiate start-up, with guaranteed operation above 1.8 V across temperature. This enables reliable cold-start from deeply discharged single-cell Li-ion or alkaline batteries. The device maintains regulation down to 1.8 V input while delivering up to 2 A at 3.3 V output - a capability confirmed in TI's SLVS916I datasheet Figure 1 and Section 6.3.
Does TPS63020DSJT support synchronization to an external clock signal?
Yes, the TPS63020DSJT supports external clock synchronization via the PS/SYNC pin. When a clock signal is applied, an internal phase-locked loop (PLL) locks to frequencies between 2.2 MHz and 2.6 MHz - matching its native 2.4 MHz switching range. This feature eliminates beat frequencies in multi-rail systems and reduces EMI in noise-sensitive applications. The PLL tolerates missing clock pulses without losing lock, as documented in Section 7.4.4 of the datasheet.
How does the power-good (PG) output of TPS63020DSJT behave during startup and fault conditions?
The TPS63020DSJT PG pin is an open-drain output that goes high-impedance when VOUT is within ±5% of regulation and pulls low when out-of-regulation or during startup/fault. It asserts low within 100 µs of detecting overvoltage, undervoltage, or overtemperature - providing the earliest possible system-level fault indication. During soft-start, PG remains low until VOUT stabilizes, enabling safe processor reset sequencing. This behavior is specified in Section 6.5 (Electrical Characteristics) and Figure 4 of the datasheet.
Can TPS63020DSJT operate with only one inductor, and what is the recommended value?
Yes, the TPS63020DSJT operates with a single 1.5 µH inductor connected across L1 and L2 pins - as shown in the Simplified Schematic (Figure 1) and confirmed in Section 8.2. The device's 4-switch buck-boost architecture uses this single inductor for both step-down and step-up energy transfer. A 1.5 µH, 3 A saturation-current shielded inductor is recommended to maintain efficiency above 90% across 100 mA–2 A loads, per TI's application note SNVA731.
What thermal protection mechanisms are built into TPS63020DSJT?
The TPS63020DSJT integrates overtemperature protection with a 140°C trip point and 20°C hysteresis - automatically disabling switching and disconnecting the load when junction temperature exceeds the threshold. Recovery occurs only after die temperature falls below 120°C. This protection operates independently of input voltage or load conditions and is verified in Section 6.5 (Electrical Characteristics) and Section 7.3.7. The DSJ package's RθJA of 41.8°C/W ensures compatibility with standard 2-layer PCB layouts without forced air cooling.
TPS63020DSJT 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)
TPS63020DSJT FAQ
1.How can I place an order for TPS63020DSJT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS63020DSJT 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 TPS63020DSJT reliable?
The price and inventory of TPS63020DSJT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS63020DSJT is usually 5 days.
3.What payment methods are accepted for TPS63020DSJT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS63020DSJT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS63020DSJT?
TPS63020DSJT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS63020DSJT 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 TPS63020DSJT?
For technical support, including TPS63020DSJT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS63020DSJT requirements.
6.How does Aetrix verify that TPS63020DSJT is sourced from the original manufacturer or authorized distributors?
All TPS63020DSJT 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 TPS63020DSJT meets industry standards.
7.What is the process for return or replacement of TPS63020DSJT?
All TPS63020DSJT units undergo pre-shipment inspection (PSI). If there is an issue with TPS63020DSJT, 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 TPS63020DSJT part is unused and in its original packaging.
Return procedure for TPS63020DSJT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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