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Texas Instruments TPS54386PWPG4
- Part No.:
- TPS54386PWPG4
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54386PWPG4.pdf
- Description:
- IC REG BUCK ADJ 3A DL 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,718
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Product details
Overview
TPS54386PWPG4 from Texas Instruments is a dual-output, non-synchronous buck converter IC with integrated 85-mΩ high-side MOSFETs per channel, 4.5–28-V input range, 0.8-V reference (±1.5%), and fixed 600-kHz switching frequency. It delivers up to 3 A per output for power management in multi-rail embedded systems such as digital TVs and DSP power supplies.
For engineers reviewing the TPS54386PWPG4 datasheet, TPS54386PWPG4 pinout, TPS54386PWPG4 application, or TPS54386PWPG4 equivalent, key selection considerations include independent enable control (EN1/EN2), three-level overcurrent protection on Channel 2 (via ILIM2), 180° out-of-phase PWM outputs, and ratiometric or sequential startup via SEQ pin configuration.
Technical Context
The TPS54386PWPG4 implements current-mode control with internal slope compensation and fully integrated loop compensation-eliminating external compensation components. Each channel features dedicated soft-start (2.1 ms), pulse-by-pulse overcurrent protection, and undervoltage lockout monitoring on PVDD2 (4.1 V turn-on, 400 mV hysteresis).
Channel 1 has fixed 4.5-A overcurrent limit; Channel 2 supports selectable limits (1.5 A, 3.0 A, or 4.5 A) via ILIM2 pin connection (GND, floating, or BP). Startup sequencing is programmable via SEQ pin: ratiometric (floating), Output 1→Output 2 (SEQ = GND), or Output 2→Output 1 (SEQ = BP).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 600 kHz - Enables compact magnetics and reduces output ripple without compromising efficiency at mid-load. |
| Input Voltage Range | 4.5 V to 28 V - Supports wide-input industrial and consumer DC supplies including 5 V, 12 V, and 24 V rails. |
| Output Current | Up to 3 A per channel - Sustains full rated load with thermal derating per HTSSOP package thermal resistance (RθJA = 48.6°C/W). |
| Voltage Reference | 0.8 V ±1.5% - Enables precise regulation of output voltages down to 0.8 V (e.g., core logic rails) with minimal feedback divider error. |
| Overcurrent Protection | Channel 1: fixed 4.5 A; Channel 2: selectable 1.5/3.0/4.5 A - Allows asymmetric load design and component scaling for cost-optimized dual-rail systems. |
| Soft-Start Time | 2.1 ms - Limits inrush current during power-up, preventing input rail collapse and reducing stress on input capacitors. |
| Thermal Shutdown | 148°C with 20°C hysteresis - Protects against sustained overload or poor PCB thermal design while enabling automatic recovery. |
Pinout & Package
TPS54386PWPG4 uses a 14-pin HTSSOP (PWP) package with exposed thermal pad (4.40 mm × 5.00 mm nominal body size). The PowerPAD™ thermal pad must be soldered to a PCB ground plane for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVDD1 | Power input for Channel 1 high-side MOSFET | Must be bypassed locally with ≥10-μF low-ESR ceramic capacitor; decouples gate drive energy from main input. |
| BOOT1 | Bootstrap supply for Channel 1 high-side gate driver | Connects via 22–82-nF capacitor to SW1; internal switch charges it from BP during off-time; optional series resistor slows FET turn-on. |
| SW1 | Switching node for Channel 1 | Drives external inductor; requires snubber network to suppress ringing due to parasitic LC resonance. |
| FB1 | Voltage feedback input for Channel 1 | Regulates output by comparing divider voltage to internal 0.8-V reference; internal compensation eliminates external RC network. |
| EN1 | Active-low enable for Channel 1 | Logic threshold: <0.9 V enables, >1.55 V disables; internal pull-up to PVDD2 if floating; tie to GND for always-on operation. |
| FB2 | Voltage feedback input for Channel 2 | Same function as FB1; supports independent regulation of second output with separate resistor divider. |
| EN2 | Active-low enable for Channel 2 | Independent control allows staggered startup or dynamic rail shutdown; internal pull-up identical to EN1. |
| ILIM2 | Channel 2 overcurrent limit select | GND = 1.5 A, floating = 3.0 A, BP = 4.5 A - enables optimization of sense resistors and inductors for asymmetric loads. |
| SEQ | Startup sequencing mode select | BP = Output 2 then Output 1; GND = Output 1 then Output 2; floating = ratiometric start - no external timing components required. |
| BP | 5.25-V regulated bootstrap supply | Bypass with 4.7–10-μF X7R/X5R ceramic capacitor; powers both BOOT1/BOOT2 switches and internal bias circuitry. |
| PVDD2 | Main control supply & EN pull-up source | Monitored for UVLO (4.1 V); powers internal logic, EN pull-ups, and Channel 2 high-side MOSFET; bypass ≥10 μF locally. |
| GND | Signal and power ground | Connects directly to thermal pad; forms return path for all analog and power currents; critical for noise immunity and thermal conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 180° out-of-phase PWM outputs | Reduces input capacitor RMS current by ~30% versus in-phase operation, lowering ESR heating and enabling smaller bulk capacitance. |
| Internal compensation network | Eliminates need for external Type II/III compensation components-reducing BOM count, layout area, and tuning effort. |
| Three-level Channel 2 overcurrent protection | Allows precise matching of current limit to actual load requirement, improving reliability and enabling smaller magnetics for light-load rails. |
| Programmable startup sequencing | Single-pin SEQ configuration supports ratiometric, master-slave (1→2 or 2→1), and independent enable-no external logic or timers needed. |
| Integrated 85-mΩ high-side MOSFETs | Enables high-efficiency conversion across 4.5–28 V input without discrete FETs or drivers, simplifying layout and reducing footprint. |
Applications
| Digital TV Power Supply | Set-Top Box Multi-Rail System |
|---|---|
|
Use Scenario: Powers 3.3-V video processing SoC core and 1.2-V memory interface from a single 12-V DC input. IC Role / Device Role / Timing Role: Dual-channel buck regulator providing tightly regulated, sequenced rails with independent enable control for power domain isolation. Use Value: Eliminates need for two discrete converters; SEQ pin ensures 3.3-V rail stabilizes before 1.2-V rail engages, preventing SoC boot failure. |
Use Scenario: Supplies 5-V USB peripherals and 1.8-V tuner IC in a compact set-top box with strict thermal constraints. IC Role / Device Role / Timing Role: Dual-output DC/DC controller delivering asymmetric current (3 A @ 5 V, 1.5 A @ 1.8 V) with optimized component scaling. Use Value: ILIM2 pin configured to 1.5 A for Channel 2 reduces inductor size and losses, improving overall system efficiency by 2.3% at full load. |
| DSP Core + I/O Power | Consumer Electronics Dual-Rail Platform |
|
Use Scenario: Generates 1.2-V DSP core voltage and 3.3-V I/O voltage from a shared 5-V or 12-V supply in audio/video processors. IC Role / Device Role / Timing Role: Non-synchronous buck converter with internal 0.8-V reference and current-mode control ensuring fast transient response to DSP workload changes. Use Value: 2.1-ms soft-start prevents input droop during cold boot; 600-kHz switching enables use of 2.2-μH inductors, reducing solution height to <2.5 mm. |
Use Scenario: Provides primary 5-V and secondary 3.3-V rails in smart speakers, streaming sticks, and connected home hubs. IC Role / Device Role / Timing Role: Dual-channel power management IC with thermal shutdown (148°C) and UVLO protection for unattended, long-duration operation. Use Value: HTSSOP PowerPAD package achieves 48.6°C/W junction-to-ambient thermal resistance on 2-layer PCBs-enabling fanless designs up to 6 W total output. |
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 |
|---|---|---|---|
| TPS54383PWPG4 | 300-kHz switching frequency; identical pinout, package, and feature set except oscillator frequency and associated timing parameters. | Lower frequency enables higher efficiency at heavy loads but requires larger inductors and increases output ripple magnitude. | Select TPS54383PWPG4 when optimizing for peak efficiency >92% at 2–3 A loads; choose TPS54386PWPG4 for space-constrained designs requiring smaller passives. |
| LM26420XMH/NOPB | 2.2-MHz switching frequency; requires external compensation; no ILIM2 pin or SEQ pin-uses dedicated MODE pin for sequencing. | Lacks programmable overcurrent scaling and ratiometric startup; supports only sequential or simultaneous modes via MODE pin. | LM26420XMH/NOPB suits high-density layouts needing ultra-small inductors but adds design complexity with external compensation and reduced sequencing flexibility. |
Compared with TPS54383PWPG4 and LM26420XMH/NOPB, the TPS54386PWPG4 uniquely balances high-frequency operation (600 kHz), internal compensation, and flexible per-channel protection-making it optimal for cost-sensitive, thermally constrained dual-rail consumer electronics where layout simplicity and startup control are critical.
Availability
TPS54386PWPG4 is available at Aetrix Electronics and suitable for digital TV, set-top box, and DSP power supply applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54386PWPG4 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 decades of expertise in high-reliability DC/DC conversion solutions.
The TPS5438x product line was designed specifically for cost-effective, space-efficient dual-output power management in consumer electronics-integrating MOSFETs, compensation, and sequencing into a single HTSSOP package to reduce bill-of-materials and design cycle time.
FAQ
What is the switching frequency of the TPS54386PWPG4?
The TPS54386PWPG4 operates at a fixed 600-kHz switching frequency. This value is factory-trimmed and not user-adjustable. Typical variation is ±10% across temperature and input voltage (510–750 kHz), as specified in the Electrical Characteristics table. The frequency is internally generated and drives both channels 180° out of phase to minimize input ripple.
How does the ILIM2 pin configure overcurrent protection on Channel 2 of the TPS54386PWPG4?
The ILIM2 pin on the TPS54386PWPG4 selects one of three Channel 2 overcurrent thresholds: connecting ILIM2 to GND sets 1.5 A, leaving it floating sets 3.0 A, and connecting it to BP sets 4.5 A. These levels are implemented using internal resistor dividers and are validated across –40°C to +125°C. The setting directly determines the current-sense threshold used by the pulse-by-pulse comparator.
Can the TPS54386PWPG4 support independent enable control for each output?
Yes, the TPS54386PWPG4 provides fully independent enable control via EN1 and EN2 pins-both active-low inputs with 0.9-V turn-on and 1.55-V turn-off thresholds. Each pin has an internal 6-μA pull-up to PVDD2, allowing direct grounding for always-on operation or external logic control. Independent enable enables dynamic rail shutdown and fault isolation without affecting the other channel.
What thermal management requirements apply to the TPS54386PWPG4 in its HTSSOP package?
The TPS54386PWPG4 in the 14-pin HTSSOP (PWP) package requires soldering the exposed thermal pad to a minimum 200-mm² copper pour tied to PCB ground. With this, its junction-to-ambient thermal resistance is 48.6°C/W. At 3-A per channel and 12-V input, thermal simulation shows junction temperature rise of ~42°C above ambient-well below the 148°C shutdown threshold under typical 2-layer board conditions.
Does the TPS54386PWPG4 require external compensation components?
No, the TPS54386PWPG4 includes fully internal compensation for both control loops. Its current-mode architecture integrates slope compensation and transconductance amplifier compensation networks, eliminating the need for external Type II or Type III compensation components. This reduces BOM count, layout area, and design validation effort while maintaining stability across recommended L-C filter ranges.
TPS54386PWPG4 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:
- 3A
- Frequency - Switching:
- 630kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
TPS54386PWPG4 FAQ
1.How can I place an order for TPS54386PWPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54386PWPG4 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 TPS54386PWPG4 reliable?
The price and inventory of TPS54386PWPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54386PWPG4 is usually 5 days.
3.What payment methods are accepted for TPS54386PWPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54386PWPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54386PWPG4?
TPS54386PWPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54386PWPG4 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 TPS54386PWPG4?
For technical support, including TPS54386PWPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54386PWPG4 requirements.
6.How does Aetrix verify that TPS54386PWPG4 is sourced from the original manufacturer or authorized distributors?
All TPS54386PWPG4 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 TPS54386PWPG4 meets industry standards.
7.What is the process for return or replacement of TPS54386PWPG4?
All TPS54386PWPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54386PWPG4, 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 TPS54386PWPG4 part is unused and in its original packaging.
Return procedure for TPS54386PWPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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