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Texas Instruments TPS54395PWPR
- Part No.:
- TPS54395PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54395PWPR.pdf
- Description:
- IC REG BUCK ADJ 3A DL 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,530
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Product details
Overview
TPS54395PWPR from Texas Instruments is a dual-channel synchronous step-down DC/DC converter with integrated 90 mΩ high-side and 60 mΩ low-side N-channel MOSFETs per channel, supporting 3 A continuous output current per channel, 4.5 V to 18 V input range, and 0.76 V to 7.0 V adjustable output voltage - used in digital TV power supplies and networking home terminals.
For engineers reviewing the TPS54395PWPR datasheet, TPS54395PWPR pinout, TPS54395PWPR application, or TPS54395PWPR equivalent, key selection criteria include D-CAP2™ adaptive on-time control for fast transient response, non-sinking pre-biased soft start, Eco-mode™ operation at light loads, and HTSSOP-16 PowerPAD™ thermal package compatibility.
Technical Context
The TPS54395PWPR implements dual independent D-CAP2™ control loops-each combining adaptive on-time PWM with internal pseudo-fixed-frequency timing (≈700 kHz), eliminating external compensation while maintaining stability with ceramic or low-ESR polymer output capacitors. Its valley-current sensing uses thermally compensated rDS(on) loss-less detection on the low-side FET.
Each channel features independent enable (EN1/EN2), soft-start (SS1/SS2), and feedback (VFB1/VFB2) pins, with dedicated PGND1/PGND2 return paths and shared signal GND. The VREG5 5.5 V LDO powers internal circuitry and supports bootstrap capacitor charging via internal diode to VBST1/VBST2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide-input industrial and consumer power rails including 5 V, 12 V, and 15 V bus systems. |
| Output Current (per channel) | 3 A continuous - enables point-of-load regulation for dual-core processors or multi-rail SoC subsystems without external current sharing. |
| Switching Frequency | ≈700 kHz (adaptive on-time) - balances efficiency, size, and EMI; frequency varies <±5% with VIN and VOUT but remains stable under load transients. |
| Feedback Reference Voltage | 765 mV ±7 mV - sets output voltage via resistor divider; temperature coefficient ±115 ppm/°C ensures accuracy across –40°C to 85°C ambient. |
| High-Side rDS(on) | 90 mΩ (typ.) - minimizes conduction loss at high duty cycles; optimized for low-VIN, high-IOUT applications like 5 V → 3.3 V conversion. |
| Low-Side rDS(on) | 60 mΩ (typ.) - enables loss-less current sensing and efficient synchronous rectification down to light loads. |
| Soft-Start Charge Current | –8.0 µA (typ.) - allows precise soft-start time adjustment using external SSx-to-GND capacitor; prevents inrush current during startup. |
| Thermal Shutdown Threshold | 155°C (typ.) - protects against sustained overload; 25°C hysteresis enables automatic recovery after cooling. |
Pinout & Package
TPS54395PWPR is packaged in a 16-pin HTSSOP (PWP) with exposed PowerPAD™ thermal pad, requiring soldering to PCB ground plane for thermal management. Package dimensions: 4.4 mm × 5.0 mm × 1.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 / VIN2 | Power Input | Primary input supply connections for Channel 1 and Channel 2; each connects to respective high-side FET drain and VREG5 LDO input. |
| VBST1 / VBST2 | Bootstrap Supply | Gate drive boost nodes; require 0.1 µF ceramic capacitor to SWx to sustain high-side FET turn-on during 100% duty cycle conditions. |
| SW1 / SW2 | Switch Node | Drain-source connection points of both high- and low-side FETs; critical for layout - minimize loop area to reduce EMI and ringing. |
| PGND1 / PGND2 | Power Ground | Dedicated low-side FET source returns; must be routed separately from SGND and tied to PowerPAD™ for optimal current sensing and thermal performance. |
| EN1 / EN2 | Enable Input | CMOS-compatible logic inputs (2.0 V H-threshold, 0.4 V L-threshold); allow independent channel sequencing and power-state control. |
| SS1 / SS2 | Soft-Start Output | Current-sink outputs (–8 µA typ.) that charge external capacitor to control ramp rate of VOUT; support non-sinking pre-biased startup. |
| VFB1 / VFB2 | Feedback Input | High-impedance (±0.4 µA max) inputs monitoring output voltage via resistor divider; reference is 765 mV with tight tolerance and low tempco. |
| GND | Signal Ground | Reference node for SSx, VFBx, and analog circuitry; must be connected at single-point star ground near VFB/SS pins to avoid noise coupling. |
| VREG5 | LDO Output | 5.5 V regulated output powering internal logic and bootstrap circuits; requires ≥1.0 µF ceramic bypass capacitor to GND for stability. |
| Exposed Pad | Thermal & Electrical Ground | Internally connected to PGND; must be soldered to large PCB copper area with ≥6 thermal vias for junction-to-board thermal resistance of 3.5°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control Mode | Enables zero-external-compensation design with fast transient response (<10 µs settling for 3 A step) and inherent stability across ceramic, POSCAP, and SP-CAP output capacitors. |
| Auto-Skip Eco-mode™ | Reduces switching frequency at light loads (<300 mA), lowering quiescent current to 15 µA and maintaining >85% efficiency at 10 mA output. |
| Non-Sinking Pre-Biased Soft Start | Prevents reverse current flow into pre-charged outputs by gradually enabling synchronous rectification - essential for hot-swap and multi-rail sequencing. |
| Thermally Compensated OCP | Uses rDS(on) current sensing with 4000 ppm/°C compensation to maintain consistent 4.7 A (typ.) current limit over –40°C to 125°C junction temperature. |
| Hiccup-Mode Overload Protection | Enters 7× soft-start delay shutdown upon UVP detection (68% VREF), limiting average power dissipation and junction temperature rise during sustained short-circuit faults. |
Applications
| Digital TV Power Supply | Networking Home Terminal |
|---|---|
Use Scenario: Dual-rail power delivery for main SoC (3.3 V) and memory interface (1.5 V) in 4K UHD television platforms with strict standby power requirements. IC Role / Device Role / Timing Role: Primary point-of-load regulator providing tightly regulated, low-noise, fast-transient power with independent channel enable for sleep/wake sequencing. Use Value: D-CAP2™ eliminates compensation components, reducing BOM count by 4–6 parts per channel; Eco-mode™ achieves <25 µA total system quiescent current in standby. | Use Scenario: Powering Ethernet PHY, Wi-Fi module, and CPU cores in residential gateways and fiber ONTs where space and thermal density are constrained. IC Role / Device Role / Timing Role: Dual-output buck controller delivering isolated 3.3 V and 1.5 V rails with independent soft-start and UVLO thresholds for robust power-up sequencing. Use Value: Integrated 90/60 mΩ FETs achieve >92% peak efficiency at 12 V input, reducing heat sink requirements and enabling 4-layer PCB designs. |
| Digital Set Top Box (STB) | Gaming Console Subsystem |
Use Scenario: Regulating core voltage (1.2 V) and I/O voltage (3.3 V) in cable/satellite STBs operating from 12 V wall adapter with variable line impedance. IC Role / Device Role / Timing Role: Adaptive on-time buck converter handling wide input ripple (±10%) and dynamic load steps up to 2 A/µs without output droop. Use Value: 700 kHz switching frequency enables compact 2.2 µH inductors and 22 µF ceramic output caps - cutting solution size by 35% vs 300 kHz alternatives. | Use Scenario: Powering GPU voltage tracking and audio codec rails in portable gaming devices requiring low EMI and zero reverse current during battery switchover. IC Role / Device Role / Timing Role: Dual-channel regulator with non-sinking pre-biased soft start and hiccup-mode protection for fault-tolerant subsystem power. Use Value: Independent EN1/EN2 and SS1/SS2 pins enable precise rail sequencing (e.g., 1.5 V before 3.3 V) and eliminate need for external supervisors or timers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54394PWPR | Same pinout and D-CAP2™ architecture, but rated for 2.5 A per channel and lower 75 mΩ/50 mΩ FETs; lacks VREG5 LDO output. | Lower current capability and no integrated 5.5 V LDO limits use in designs requiring bootstrap or internal bias supply. | Select when total output current ≤2.5 A/channel and external 5 V bias is available. |
| MP8772GQ-Z | Monolithic dual 3 A buck with constant-on-time control, 2.7–18 V input, but no VREG5 output and only one shared EN pin. | Single enable limits independent channel sequencing; no pre-biased soft start or hiccup-mode protection. | Select for cost-sensitive, non-sequencing applications where footprint and basic regulation suffice. |
Compared with TPS54395PWPR, TPS54394PWPR offers reduced conduction loss at light loads but sacrifices 0.5 A/channel headroom and integrated bias; MP8772GQ-Z provides smaller QFN packaging but removes critical sequencing and protection features needed for complex embedded systems.
Availability
TPS54395PWPR is available at Aetrix Electronics and suitable for digital TV power supplies, networking home terminals, and digital set-top box applications requiring stable component supply, long-term production continuity, and automotive-grade reliability validation.
Supply support for TPS54395PWPR 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 and system-level power architecture.
The TPS54395 product line delivers dual-channel, high-density synchronous buck regulators targeting space-constrained consumer and industrial applications where fast transient response, low quiescent current, and seamless light-load efficiency are critical.
FAQ
What is the recommended input capacitor configuration for TPS54395PWPR?
TPS54395PWPR requires a minimum 10 µF ceramic input capacitor (X5R/X7R dielectric, ≥25 V rating) placed close to VIN1/VIN2 pins, plus 0.1 µF ceramic capacitors directly from VIN1 and VIN2 to PGND. This configuration suppresses high-frequency switching noise and maintains stability under fast load transients. Bulk capacitance beyond 10 µF may be added depending on input source impedance and ripple requirements.
Does TPS54395PWPR support independent voltage sequencing between its two channels?
Yes, TPS54395PWPR supports full independent sequencing via separate EN1/EN2 enable inputs and SS1/SS2 soft-start pins. Each channel can be powered up/down at different times, with programmable ramp rates using external SSx-to-GND capacitors. This enables precise ordering - for example, powering a 1.5 V core rail before a 3.3 V I/O rail - without external controllers.
How does the D-CAP2™ control mode in TPS54395PWPR improve transient response compared to traditional voltage-mode control?
TPS54395PWPR's D-CAP2™ control uses adaptive on-time modulation with built-in ripple injection, achieving sub-10 µs output voltage recovery from 3 A load steps. Unlike voltage-mode controllers requiring external compensation networks, D-CAP2™ eliminates phase-margin tuning and remains stable with ultra-low-ESR ceramic capacitors - reducing output voltage deviation by up to 60% versus conventional solutions.
Can TPS54395PWPR operate with pre-biased outputs, and how is reverse current prevented?
Yes, TPS54395PWPR includes non-sinking pre-biased soft start. When the output voltage exceeds the internal soft-start reference, the controller initiates low-side FET gate pulses with narrow, incrementally increasing on-time - preventing reverse current flow into the pre-charged rail. This feature is confirmed in the datasheet Figure 10 and 11 waveforms for VO1 and VO2 startup.
What thermal management practices are required for reliable operation of TPS54395PWPR at full 3 A load per channel?
TPS54395PWPR requires soldering of its exposed PowerPAD™ to a minimum 200 mm² PCB copper area with ≥6 thermal vias (0.3 mm diameter) connecting to inner ground planes. With this layout, junction temperature rise is limited to <35°C at 12 V input and 3 A/channel in still air. Thermal derating above 65°C ambient is necessary per the θJA = 41.4°C/W specification in PWP package.
TPS54395PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 16-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):
- 18V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 3A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS54395PWPR FAQ
1.How can I place an order for TPS54395PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54395PWPR 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 TPS54395PWPR reliable?
The price and inventory of TPS54395PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54395PWPR is usually 5 days.
3.What payment methods are accepted for TPS54395PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54395PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54395PWPR?
TPS54395PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54395PWPR 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 TPS54395PWPR?
For technical support, including TPS54395PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54395PWPR requirements.
6.How does Aetrix verify that TPS54395PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54395PWPR 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 TPS54395PWPR meets industry standards.
7.What is the process for return or replacement of TPS54395PWPR?
All TPS54395PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54395PWPR, 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 TPS54395PWPR part is unused and in its original packaging.
Return procedure for TPS54395PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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