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Texas Instruments TPS54386PWPRG4
- Part No.:
- TPS54386PWPRG4
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54386PWPRG4.pdf
- Description:
- IC REG BUCK ADJ 3A DL 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,452
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Product details
Overview
TPS54386PWPRG4 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 TPS54386PWPRG4 datasheet, TPS54386PWPRG4 pinout, TPS54386PWPRG4 application, or TPS54386PWPRG4 equivalent, key selection considerations include dual-channel current-mode control, 180° out-of-phase PWM operation, three-level overcurrent protection on Channel 2, ratiometric/sequential startup via SEQ pin, and internal compensation eliminating external loop components.
Technical Context
The TPS54386PWPRG4 implements current-mode control with internal slope compensation and fixed-frequency PWM generation at 600 kHz, with outputs operating 180° out of phase to reduce input ripple. Each channel integrates its own error amplifier, soft-start circuit (2.1 ms), and cycle-by-cycle overcurrent protection - Channel 1 fixed at 4.5 A, Channel 2 selectable (1.5 A / 3.0 A / 4.5 A) via ILIM2 pin configuration.
Startup sequencing is controlled by the SEQ pin: tied to BP enables Output 2 → Output 1 sequential startup; tied to GND enables Output 1 → Output 2; floating enables ratiometric startup. The BP regulator (5.25 V ±5%) powers both bootstrap circuits and requires a 4.7–10-μF X7R ceramic capacitor, while PVDD1 and PVDD2 support independent input sourcing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 600 kHz (fixed, eliminates external timing component; reduces size of L-C filter) |
| Input Voltage Range | 4.5 V to 28 V (supports wide industrial and consumer DC bus rails including 5 V, 12 V, 24 V) |
| Output Current (per channel) | Up to 3 A continuous (enables compact dual-rail solutions without external current sharing) |
| Voltage Reference | 0.8 V ±1.5% (tight tolerance enables accurate regulation of low-voltage rails like 1.2 V, 1.8 V, 3.3 V) |
| Overcurrent Protection | Channel 1: fixed 4.5 A; Channel 2: selectable 1.5 A / 3.0 A / 4.5 A (via ILIM2 pin state) |
| Soft-Start Time | 2.1 ms (internally fixed; prevents inrush current during power-up without external RC) |
| Thermal Shutdown | 148°C with 20°C hysteresis (protects against sustained overload or poor PCB thermal design) |
Pinout & Package
TPS54386PWPRG4 uses a 14-pin HTSSOP package (4.4 mm × 5.0 mm) with exposed PowerPAD™ thermal pad requiring direct connection to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVDD1 | Power input for Channel 1 high-side MOSFET | Must be bypassed with ≥10-μF low-ESR ceramic capacitor; supports independent input sourcing from PVDD2 |
| PVDD2 | Main supply for control logic, EN pull-ups, and Channel 2 high-side MOSFET | Monitored for UVLO (4.1 V turn-on); powers internal BP regulator and enables device startup |
| BOOT1, BOOT2 | Bootstrap gate drive nodes for Channels 1 and 2 | Each requires 22–82-nF capacitor to SWx; internal switch charges from BP; optional series resistor slows FET turn-on |
| SW1, SW2 | Switch node outputs for Channels 1 and 2 | Connect to external inductor; snubber recommended to suppress ringing due to fast dV/dt |
| FB1, FB2 | Voltage feedback inputs | Regulate output to 0.8 V reference via resistor divider; internal transconductance error amplifier and compensation |
| EN1, EN2 | Active-low enable inputs | Enable respective channel when <0.9 V; internal 6-μA pull-up to PVDD2 if floating; tie to GND for always-on operation |
| SEQ | Startup sequencing mode selector | BP = Output 2→1 sequence; GND = Output 1→2 sequence; floating = ratiometric startup |
| ILIM2 | Channel 2 overcurrent threshold select | GND = 1.5 A; floating = 3.0 A; BP = 4.5 A (enables asymmetric load optimization) |
| BP | 5.25-V regulated bootstrap supply | Bypass with 4.7–10-μF X7R/X5R ceramic capacitor; powers both BOOTx circuits and internal logic |
| GND | Signal and power ground | Must connect directly to thermal pad; forms return path for all channels and BP regulator |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3-A non-synchronous buck channels | Integrated 85-mΩ high-side MOSFETs per channel eliminate external switches and reduce BOM count |
| Internal compensation | No external compensation network required - simplifies layout and ensures stability across typical L-C combinations |
| 180° out-of-phase PWM operation | Reduces input capacitor RMS current and EMI compared to in-phase dual converters |
| Three-level Channel 2 overcurrent protection | ILIM2 pin configures fault threshold to match actual load, avoiding overdesign of magnetics and FETs |
| Programmable startup sequencing | Single SEQ pin selects ratiometric, Output 1-first, or Output 2-first sequencing - no external logic needed |
Applications
| Digital Television Power Supply | Set-Top Box Power Management |
|---|---|
|
Use Scenario: Dual-rail power delivery for main SoC (1.2 V) and memory interface (3.3 V) in HD digital TV platforms. IC Role / Device Role / Timing Role: Primary dual-output DC-DC controller managing independent voltage domains with precise sequencing and current limiting. Use Value: Enables single-chip replacement of two discrete buck controllers, reducing board area and improving transient response coordination between rails. |
Use Scenario: Compact, cost-sensitive power solution for cable/satellite STB with separate 1.8-V processor and 5-V peripheral rails. IC Role / Device Role / Timing Role: Dual-channel buck converter providing ratiometric startup and independent enable control for flexible system power-up. Use Value: Eliminates need for external sequencing IC or discrete enable logic, lowering total solution cost and complexity. |
| DSP Core + I/O Power System | Consumer Audio/Video Processor Board |
|
Use Scenario: Powering TI C6000-series DSPs requiring tightly regulated 1.4-V core and 3.3-V I/O supplies with strict voltage tracking. IC Role / Device Role / Timing Role: Dual synchronous-buck controller delivering matched soft-start and overcurrent protection for critical signal processing subsystems. Use Value: Internal 0.8-V reference (±1.5%) and 2.1-ms soft-start ensure reliable boot without external trimming or timing components. |
Use Scenario: Multi-output power for portable media players with variable load profiles across display backlight, audio codec, and baseband processor. IC Role / Device Role / Timing Role: Dual buck converter supporting independent enable/disable and scalable overcurrent thresholds for dynamic load management. Use Value: ILIM2-selectable current limits allow optimized component sizing for low-power standby vs. active playback modes. |
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 and feature set except oscillator frequency | Lower switching frequency increases inductor size but reduces switching losses at light loads | Select TPS54383PWPR when lower EMI or higher efficiency at <1-A loads is prioritized over compact magnetics |
| LM27402SQ/NOPB | Requires external MOSFETs; supports adjustable frequency (200–1000 kHz); no integrated BP regulator | Greater design flexibility for high-current (>5 A) or custom thermal layouts, but adds component count and compensation effort | Choose LM27402SQ/NOPB only when >3-A per rail or programmable frequency is mandatory; not drop-in compatible |
Compared with TPS54386PWPRG4, TPS54383PWPR offers lower-frequency operation for relaxed EMI filtering, while LM27402SQ/NOPB trades integration for configurability - neither matches the TPS54386PWPRG4's combination of fixed 600-kHz timing, internal MOSFETs, and single-pin sequencing.
Availability
TPS54386PWPRG4 is available at Aetrix Electronics and suitable for digital television, set-top box, and DSP power supply designs requiring stable component supply, long-term production continuity, and automotive-grade reliability screening.
Supply support for TPS54386PWPRG4 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 TPS5438x family was designed specifically for space-constrained, dual-rail consumer and industrial applications requiring minimal external components, robust fault protection, and flexible power sequencing - targeting digital video, communications, and embedded computing markets.
FAQ
What is the switching frequency of the TPS54386PWPRG4?
The TPS54386PWPRG4 operates at a fixed 600-kHz switching frequency. This value is internally set and cannot be adjusted externally. It enables smaller external inductors and capacitors compared to lower-frequency alternatives like the 300-kHz TPS54383PWPR, while maintaining good efficiency across typical load ranges. The TPS54386PWPRG4 datasheet specifies typical frequency as 630 kHz with min/max of 510 kHz and 750 kHz over temperature and voltage.
How does the ILIM2 pin configure overcurrent protection on Channel 2 of the TPS54386PWPRG4?
The ILIM2 pin on the TPS54386PWPRG4 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 an internal 150-kΩ resistor divider between BP and GND. This allows designers to scale external inductors and MOSFETs precisely to actual load requirements rather than full 3-A capability, improving efficiency and thermal margin.
Can the TPS54386PWPRG4 operate with different input voltages on PVDD1 and PVDD2?
Yes, the TPS54386PWPRG4 supports dual-supply operation: PVDD1 powers only the Channel 1 high-side MOSFET, while PVDD2 powers the control circuitry, EN pull-ups, and Channel 2 high-side MOSFET. The datasheet confirms PVDD1 may be higher or lower than PVDD2, enabling use cases such as powering Channel 1 from a 12-V rail and Channel 2 from a 5-V auxiliary supply - provided both remain within the 4.5–28-V absolute range and PVDD2 meets UVLO (≥4.1 V) for startup.
What is the purpose of the SEQ pin on the TPS54386PWPRG4?
The SEQ pin on the TPS54386PWPRG4 determines output startup sequencing mode: tying SEQ to BP enables Output 2 to start first, then Output 1 after regulation (~400 μs delay); tying SEQ to GND enables Output 1 to start first, then Output 2; leaving SEQ floating enables ratiometric startup where both outputs begin soft-start simultaneously and reach regulation at the same time. This single-pin control eliminates need for external sequencing ICs or discrete logic in multi-rail systems.
Does the TPS54386PWPRG4 require external compensation components?
No, the TPS54386PWPRG4 features fully internal compensation for both control loops. Its current-mode architecture includes built-in slope compensation and transconductance error amplifiers with fixed compensation networks, so no external resistors or capacitors are needed for loop stability. Designers must still select appropriate output inductors and capacitors per the Feedback Loop and L-C Filter Selection guidelines in the datasheet to ensure phase margin and transient response meet system requirements.
TPS54386PWPRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
TPS54386PWPRG4 FAQ
1.How can I place an order for TPS54386PWPRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54386PWPRG4 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 TPS54386PWPRG4 reliable?
The price and inventory of TPS54386PWPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54386PWPRG4 is usually 5 days.
3.What payment methods are accepted for TPS54386PWPRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54386PWPRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54386PWPRG4?
TPS54386PWPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54386PWPRG4 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 TPS54386PWPRG4?
For technical support, including TPS54386PWPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54386PWPRG4 requirements.
6.How does Aetrix verify that TPS54386PWPRG4 is sourced from the original manufacturer or authorized distributors?
All TPS54386PWPRG4 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 TPS54386PWPRG4 meets industry standards.
7.What is the process for return or replacement of TPS54386PWPRG4?
All TPS54386PWPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54386PWPRG4, 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 TPS54386PWPRG4 part is unused and in its original packaging.
Return procedure for TPS54386PWPRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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