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Texas Instruments TPS54386PWPR
- Part No.:
- TPS54386PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54386PWPR.pdf
- Description:
- IC REG BUCK ADJ 3A DL 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,962
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Product details
Overview
TPS54386PWPR 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 ±1.5% reference, 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 TPS54386PWPR datasheet, TPS54386PWPR pinout, TPS54386PWPR application, or TPS54386PWPR equivalent, key selection criteria include its dual-channel current-mode control, 180° out-of-phase PWM outputs, three-level ILIM2 overcurrent configuration, ratiometric/sequential startup via SEQ pin, and HTSSOP-14 PowerPAD™ package thermal performance.
Technical Context
The TPS54386PWPR implements current-mode control with internal slope compensation and fully integrated loop compensation-eliminating external compensation components. Each channel features independent enable (EN1/EN2), feedback (FB1/FB2), and bootstrap (BOOT1/BOOT2) circuitry, while sharing BP regulator, 0.8-V reference, oscillator, and thermal shutdown at 148°C.
Its dual PWM outputs operate 180° out of phase to reduce input ripple current; startup sequencing (ratiometric or sequential) is selected by the SEQ pin state; overcurrent protection on Channel 2 is configurable via ILIM2 pin (GND/floating/BP), enabling asymmetric load optimization without redesigning current-sense networks.
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 rails. |
| Switching Frequency | 600 kHz (TPS54386 variant) - enables smaller magnetics and faster transient response vs. 300-kHz TPS54383. |
| Output Current | Up to 3 A per channel - sustained delivery enabled by 85-mΩ internal high-side MOSFETs and PowerPAD™ thermal dissipation. |
| Feedback Reference | 0.8 V ±1.5% - sets precise output voltage via resistor divider; tolerance directly impacts regulation accuracy across temperature. |
| Soft-Start Time | 2.1 ms typical - internally fixed ramp prevents inrush current; not adjustable externally. |
| Overcurrent Protection | Channel 1: fixed 4.5 A; Channel 2: selectable 1.5 A / 3.0 A / 4.5 A via ILIM2 pin - allows derating for lighter secondary loads. |
| Thermal Shutdown | 148°C with 20°C hysteresis - protects against sustained overload or poor PCB heatsinking; automatic recovery after cooldown. |
Pinout & Package
TPS54386PWPR uses a 14-pin HTSSOP (PWP) package with exposed thermal pad (PowerPAD™), 4.40 mm × 5.00 mm body size, and GND-connected bottom pad requiring direct connection to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVDD1 | Power supply for CH1 high-side MOSFET | Must be bypassed with ≥10-μF low-ESR ceramic capacitor; independent of PVDD2 for dual-supply operation. |
| PVDD2 | Main bias supply & EN pull-up source | Monitored for UVLO (4.1 V turn-on); powers control logic, EN1/EN2 pull-ups, and CH2 high-side MOSFET. |
| BOOT1 / BOOT2 | High-side gate driver charge reservoir nodes | Each requires 22–82-nF capacitor to SWx; series 1–3 Ω resistor slows CH1/CH2 turn-on to reduce EMI. |
| SW1 / SW2 | Switch node outputs | Connect to external inductor; snubber recommended to suppress ringing due to fast MOSFET switching. |
| FB1 / FB2 | Voltage feedback inputs | Regulate outputs to 0.8 V reference; resistor dividers set output voltage; internal transconductance error amplifier. |
| EN1 / EN2 | Active-low enable controls | Enable threshold: <0.9 V (ON), >1.55 V (OFF); internal 6-μA pull-up to PVDD2 if floating. |
| SEQ | Startup sequencing mode selector | BP = CH2→CH1 sequential; GND = CH1→CH2 sequential; floating = ratiometric start - no external timing components needed. |
| ILIM2 | CH2 overcurrent level select | GND = 1.5 A, floating = 3.0 A, BP = 4.5 A - sets current limit without changing sense resistor or layout. |
| BP | 5.25-V bootstrap regulator output | Bypass with 4.7–10-μF X7R/X5R ceramic; supplies BOOT1/BOOT2 and internal logic; short-circuit protected (10–30 mA). |
| GND | Signal and power ground | Connected to thermal pad; must tie pad directly to large PCB ground plane for thermal conduction and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 180° out-of-phase PWM outputs | Reduces input capacitor RMS current by ~30% and eases EMI filtering versus in-phase operation. |
| Internal loop compensation | Eliminates 4–6 external compensation components per channel, reducing BOM count and layout sensitivity. |
| Three-level CH2 overcurrent setting | Enables optimal component scaling for asymmetrical loads (e.g., 3-A core rail + 1.5-A I/O rail) without sacrificing fault margin. |
| Single-pin startup sequencing | SEQ pin configures ratiometric or master-slave sequencing - no external timers, logic, or firmware required. |
| Integrated 85-mΩ high-side MOSFETs | Enables compact 3-A per channel design without discrete FETs, drivers, or bootstrap diodes. |
Applications
| Set-Top Box Power | Digital TV Mainboard |
|---|---|
Use Scenario: Dual-rail power for MPEG decoder SoC (1.2 V core, 3.3 V I/O) and HDMI PHY in cable/satellite STB. IC Role / Device Role / Timing Role: Primary dual-buck controller delivering regulated, sequenced voltages with tight transient response during channel changes. Use Value: 600-kHz switching minimizes inductor size; 180° phase shift cuts input ripple; SEQ pin ensures safe SoC boot order. | Use Scenario: Powering main processor, DDR memory interface, and audio/video processing ASICs in flat-panel TV. IC Role / Device Role / Timing Role: Central power IC managing independent enable/control of core, memory, and peripheral rails with thermal robustness. Use Value: 4.5–28-V input accommodates varied AC-DC adapter outputs; 148°C thermal shutdown prevents field failures under dust-blocked heatsinks. |
| DSP Board Supply | Consumer Audio Amplifier |
Use Scenario: Providing clean, low-noise 1.8 V and 3.3 V rails for TI C6000-series DSPs in professional audio interfaces. IC Role / Device Role / Timing Role: Dual-channel buck converter with independent EN pins enabling dynamic rail enable/disable during low-power modes. Use Value: 0.8-V ±1.5% reference ensures accurate DSP core voltage; internal soft-start prevents brownout during wake-up. | Use Scenario: Generating 5 V and 12 V rails for Class-D amplifier ICs and analog front-end in smart speakers and soundbars. IC Role / Device Role / Timing Role: Compact dual-output regulator replacing discrete solutions; ILIM2 pin allows safe derating of 12-V rail for lower-current analog stages. Use Value: 85-mΩ MOSFETs deliver >90% efficiency at 2-A loads; PowerPAD™ package sustains continuous 3-A operation with 2-layer PCB. |
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 |
|---|---|---|---|
| TPS54383PWPR | 300-kHz switching frequency; identical pinout, package, and feature set except oscillator frequency. | Better suited for designs prioritizing EMI reduction over size - larger inductors/capacitors required. | Select TPS54383PWPR when lower switching frequency eases EMI compliance or when reusing legacy 300-kHz reference designs. |
| MP2451DT-LF-Z | Single-channel 2-A converter; no dual output, no SEQ/ILIM2 pins; 2-MHz fixed frequency; SOT-23-6 package. | Requires two separate ICs to match TPS54386PWPR's dual 3-A capability; no sequencing or asymmetric OCP. | Choose MP2451DT-LF-Z only for space-constrained single-rail applications where dual output is unnecessary. |
Compared with TPS54383PWPR, the TPS54386PWPR offers higher switching frequency for smaller passive components but slightly higher switching losses; compared with MP2451DT-LF-Z, it provides true dual-channel integration, sequencing, and scalable overcurrent protection - eliminating board area, BOM count, and control complexity.
Availability
TPS54386PWPR is available at Aetrix Electronics and suitable for digital TV, set-top box, DSP power, and consumer audio amplifier applications requiring stable component supply, long-term production support, and consistent parametric performance across manufacturing lots.
Supply support for TPS54386PWPR 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 power conversion ICs.
The TPS5438x product line was designed for cost-sensitive, space-constrained dual-rail DC-DC applications in consumer electronics and industrial equipment, integrating MOSFETs, compensation, and sequencing to minimize external components.
FAQ
What is the switching frequency of the TPS54386PWPR?
The TPS54386PWPR operates at a fixed 600 kHz switching frequency, as defined by its part number suffix (TPS54386 = 600 kHz variant). This is confirmed in the SLUS774C datasheet Section 1 "Features" and Electrical Characteristics Table 7.5. The TPS54386PWPR does not support frequency adjustment - unlike the TPS54383PWPR, which runs at 300 kHz. Both share identical pinout and package.
How does the SEQ pin configure startup sequencing on the TPS54386PWPR?
The SEQ pin on the TPS54386PWPR selects startup mode: tied to BP enables sequential startup with Output 2 first, then Output 1 (~400 μs delay after regulation); tied to GND reverses the order (Output 1 first); left floating enables ratiometric startup where both outputs rise simultaneously. This behavior is documented in Section 8.3.5 and Table 1 of the SLUS774C datasheet.
Can the TPS54386PWPR drive different input voltages on PVDD1 and PVDD2?
Yes - the TPS54386PWPR supports dual-supply operation: PVDD2 powers control logic and EN pull-ups, while PVDD1 supplies only the Channel 1 high-side MOSFET. Section 8.3.3 states "The voltage on PVDD1 may be higher or lower than PVDD2," enabling flexible power tree design, such as using a local 12-V rail for CH1 and a shared 5-V bias for CH2 and logic.
What is the purpose of the ILIM2 pin on the TPS54386PWPR?
The ILIM2 pin on the TPS54386PWPR configures Channel 2's overcurrent protection threshold: grounded = 1.5 A, floating = 3.0 A, connected to BP = 4.5 A. This allows hardware-based scaling of current limits for asymmetric loads without modifying sense resistors or layout - a key differentiator from Channel 1's fixed 4.5-A limit. Details are in Pin Functions Table and Section 7.5 Electrical Characteristics.
Does the TPS54386PWPR require external compensation components?
No - the TPS54386PWPR includes fully internal loop compensation, as stated in the "Features" list and Section 8.1 Overview. This eliminates the need for external RC networks typically required in controllers like the TPS543x family's non-integrated counterparts. Designers must instead select appropriate L-C filter values per the "Feedback Loop and L-C Filter Selection" guidance in the datasheet to ensure stability.
TPS54386PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
TPS54386PWPR FAQ
1.How can I place an order for TPS54386PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54386PWPR 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 TPS54386PWPR reliable?
The price and inventory of TPS54386PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54386PWPR is usually 5 days.
3.What payment methods are accepted for TPS54386PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54386PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54386PWPR?
TPS54386PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54386PWPR 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 TPS54386PWPR?
For technical support, including TPS54386PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54386PWPR requirements.
6.How does Aetrix verify that TPS54386PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54386PWPR 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 TPS54386PWPR meets industry standards.
7.What is the process for return or replacement of TPS54386PWPR?
All TPS54386PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54386PWPR, 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 TPS54386PWPR part is unused and in its original packaging.
Return procedure for TPS54386PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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