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Texas Instruments TPS54286PWPG4
- Part No.:
- TPS54286PWPG4
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54286PWPG4.pdf
- Description:
- IC REG BUCK ADJ 2A DL 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,245
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Product details
Overview
TPS54286PWPG4 from Texas Instruments is a dual non-synchronous buck converter IC with two integrated 100-mΩ high-side N-channel MOSFETs, supporting 4.5 V to 28 V input and delivering up to 2 A per channel. It features fixed 600 kHz switching frequency, 0.8 V ±1.5% internal voltage reference, and dual PWM outputs operating 180° out-of-phase-used in set-top box power rails and DSP core supply.
For engineers reviewing the TPS54286PWPG4 datasheet, TPS54286PWPG4 pinout, TPS54286PWPG4 application, or TPS54286PWPG4 equivalent, key selection considerations include its dual-channel current-mode control, selectable overcurrent protection on Channel 2 (1.5 A or 3.0 A), ratiometric/sequential startup via SEQ pin, and thermal shutdown at 148°C.
Technical Context
The TPS54286PWPG4 implements current-mode control with internal slope compensation and fully integrated loop compensation-eliminating external compensation components. Its dual PWM channels share a single 5.25-V BP regulator and 0.8-V precision reference, while operating on alternating clock cycles for inherent 180° phase shift.
Startup sequencing is programmable via the SEQ pin (BP/GND/floating) to support ratiometric, master-slave sequential, or independent enable behavior. Overcurrent protection differs per channel: Channel 1 fixed at 3.0 A, Channel 2 configurable via ILIM2 pin (GND = 1.5 A, floating = 3.0 A, BP = 1.5 A), enabling asymmetric load optimization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 28 V - supports wide industrial and consumer DC bus inputs including 5 V, 12 V, and 24 V systems. |
| Switching Frequency | 600 kHz (TPS54286 variant) - enables smaller magnetics and faster transient response vs. 300 kHz TPS54283. |
| Output Current | Up to 2 A per channel - sufficient for powering DSP cores, FPGAs, and memory I/O rails. |
| Feedback Reference | 0.8 V ±1.5% - sets output voltage via resistor divider; tolerance directly impacts regulation accuracy. |
| Soft Start Time | 2.1 ms - controls inrush current during power-up; internally fixed, no external capacitor required. |
| Thermal Shutdown | 148°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Package | 14-pin HTSSOP with PowerPAD™ - thermally enhanced package requiring exposed pad soldered to ground plane. |
Pinout & Package
TPS54286PWPG4 uses a 14-pin HTSSOP (PWP) package with an exposed thermal pad on the bottom side. The PowerPAD™ must be soldered to a PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVDD1 (Pin 1) | Power input for Channel 1 high-side MOSFET | Supplies gate drive and conduction path for Output 1; bypass with ≥10 µF ceramic capacitor to GND. |
| BOOT1 (Pin 2) | Bootstrap supply for Channel 1 high-side driver | Connects via 22–82 nF capacitor to SW1; internal switch charges it during low-side conduction. |
| SW1 (Pin 3) | Switch node for Channel 1 | Drives external inductor; requires snubber network to suppress ringing due to fast dV/dt. |
| GND (Pin 4) | Signal and power ground reference | Must connect directly to thermal pad; forms return path for control circuitry and MOSFET sources. |
| SEQ (Pin 10) | Startup sequencing mode selector | Configures ratiometric (floating), Output 2→1 (BP), or Output 1→2 (GND) power-up sequence. |
| ILIM2 (Pin 9) | Channel 2 overcurrent threshold select | Ground = 1.5 A limit; floating = 3.0 A limit; enables scaling of output filter for asymmetrical loads. |
| FB1 / FB2 (Pins 7, 8) | Voltage feedback inputs | Compare output divider ratio against 0.8 V reference; internal transconductance error amp drives PWM. |
| EN1 / EN2 (Pins 5, 6) | Active-low enable inputs | Pull <0.9 V to enable respective channel; internal 6 µA pull-up to PVDD2 if left floating. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 100-mΩ integrated high-side MOSFETs | Eliminates external switches and reduces BOM count; RDS(on) stable across –40°C to +125°C. |
| Internal compensation network | Removes need for external Type II/III compensation components-simplifies layout and validation. |
| 180° out-of-phase dual PWM outputs | Reduces input ripple current by ~70% vs. in-phase operation-lowers input capacitor RMS stress. |
| Programmable Channel 2 overcurrent level | Supports 1.5 A or 3.0 A trip thresholds via ILIM2 pin-enables optimized inductor/capacitor sizing for mixed-load systems. |
| 2.1-ms fixed soft start | Prevents inrush-induced voltage droop on shared input rails; no external timing capacitor required. |
Applications
| Set-Top Box Power Management | Digital TV Core Supply |
|---|---|
Use Scenario: Dual-rail power for MPEG decoder SoC requiring 1.2 V core and 3.3 V I/O with controlled sequencing. IC Role / Device Role / Timing Role: Primary dual-output DC/DC controller managing independent enable, soft-start ramp, and fault recovery. Use Value: SEQ pin configures ratiometric startup ensuring 3.3 V I/O powers before 1.2 V core; 600 kHz switching minimizes EMI in RF-sensitive enclosures. |
Use Scenario: Powering video processing ASIC with tight voltage tolerance and thermal constraints in compact chassis. IC Role / Device Role / Timing Role: Dual-channel buck regulator delivering 1.8 V and 2.5 V rails with independent EN control and thermal shutdown. Use Value: Internal 0.8 V reference ±1.5% ensures <±2% output accuracy; PowerPAD™ HTSSOP package sustains 2 A/channel under 65°C ambient. |
| DSP Board Core Voltage | Consumer Electronics Dual Rail |
Use Scenario: Supplying TI C6000 DSP with 1.4 V core and 3.3 V peripheral rail from 12 V input. IC Role / Device Role / Timing Role: Integrated dual converter replacing discrete controllers and MOSFETs; handles UVLO, soft-start, and hiccup-mode OCP. Use Value: Pulse-by-pulse overcurrent protection prevents latch-up during DSP burst loads; 180° phase shift cuts input capacitor size by 40%. |
Use Scenario: Compact audio/video hub requiring isolated 5 V USB and 1.2 V logic rails from single 19 V adapter. IC Role / Device Role / Timing Role: Dual-output buck IC with independent EN pins enabling dynamic rail enable/disable based on system state. Use Value: ILIM2 pin allows 1.2 V rail to use lower-current inductor (1.5 A rating) while 5 V rail retains full 2 A capability-optimizing cost and footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54283PWPG4 | 300 kHz switching frequency; identical pinout, package, and feature set except oscillator frequency. | Better suited for noise-sensitive analog sections where lower switching frequency reduces EMI risk. | Select when input filter size or EMI compliance outweighs transient response speed requirements. |
| LM26420XSDE/NOPB | 2.2 MHz fixed frequency; 3.5 A per channel; requires external compensation; different pinout and package (HTSSOP-20). | Higher current and frequency support smaller inductors but demand more layout effort and component count. | Choose for space-constrained designs needing >2 A or sub-1 µs transient response-requires redesign of feedback and layout. |
Compared with TPS54286PWPG4, TPS54283PWPG4 offers lower-frequency operation for reduced EMI without changing PCB layout, while LM26420XSDE/NOPB delivers higher performance at the cost of increased design complexity and no pin compatibility.
Availability
TPS54286PWPG4 is available at Aetrix Electronics and suitable for set-top box power management, digital TV core supply, and DSP board core voltage applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54286PWPG4 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-reliability power conversion solutions.
The TPS5428x family was designed specifically for cost-sensitive dual-rail consumer and industrial applications requiring integrated high-side FETs, minimal external components, and flexible sequencing-targeting set-top boxes, digital TVs, and DSP power systems.
FAQ
What is the switching frequency of the TPS54286PWPG4?
The TPS54286PWPG4 operates at a fixed 600 kHz switching frequency, as defined by its part number variant (TPS54286). This is confirmed in the Electrical Characteristics table and distinguishes it from the 300 kHz TPS54283. The higher frequency enables smaller external inductors and capacitors while maintaining stable current-mode control with internal slope compensation.
How does the ILIM2 pin configure overcurrent protection on Channel 2 of the TPS54286PWPG4?
The ILIM2 pin on the TPS54286PWPG4 selects between two overcurrent thresholds for Channel 2: connecting ILIM2 to GND sets the limit to 1.5 A, while leaving it floating sets it to 3.0 A. This is implemented via an internal resistor divider and is documented in the Electrical Characteristics table under ICL2 test conditions. Channel 1 overcurrent remains fixed at 3.0 A.
Can the TPS54286PWPG4 support independent enable control for each output channel?
Yes, the TPS54286PWPG4 supports independent enable control via dedicated EN1 (Pin 5) and EN2 (Pin 6) inputs. Each is active-low with 0.9 V turn-on threshold and internal 6 µA pull-up to PVDD2. When one EN pin is pulled low and the other remains high (>1.55 V), only the corresponding channel starts-allowing staggered or conditional power-up in multi-rail systems.
What is the purpose of the SEQ pin on the TPS54286PWPG4, and how does it affect startup behavior?
The SEQ pin on the TPS54286PWPG4 configures output voltage sequencing: tied to BP enables Output 2 → Output 1 sequential startup; tied to GND enables Output 1 → Output 2; left floating enables ratiometric startup. This single-pin control eliminates external logic and is validated in the Application Information section with timing waveforms showing ~400 µs delay between regulated outputs.
Does the TPS54286PWPG4 require external compensation components?
No, the TPS54286PWPG4 includes fully internal loop compensation, as stated in the Features list and confirmed in the Block Diagram and Application Information sections. This eliminates external RC networks typically needed for Type II/III compensation, reducing BOM count and simplifying layout-though external L-C filter selection must still follow stability guidelines in the datasheet.
TPS54286PWPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 25.2V
- Current - Output:
- 2A
- Frequency - Switching:
- 630kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
TPS54286PWPG4 FAQ
1.How can I place an order for TPS54286PWPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54286PWPG4 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 TPS54286PWPG4 reliable?
The price and inventory of TPS54286PWPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54286PWPG4 is usually 5 days.
3.What payment methods are accepted for TPS54286PWPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54286PWPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54286PWPG4?
TPS54286PWPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54286PWPG4 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 TPS54286PWPG4?
For technical support, including TPS54286PWPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54286PWPG4 requirements.
6.How does Aetrix verify that TPS54286PWPG4 is sourced from the original manufacturer or authorized distributors?
All TPS54286PWPG4 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 TPS54286PWPG4 meets industry standards.
7.What is the process for return or replacement of TPS54286PWPG4?
All TPS54286PWPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54286PWPG4, 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 TPS54286PWPG4 part is unused and in its original packaging.
Return procedure for TPS54286PWPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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