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Texas Instruments TPS54495PWP
- Part No.:
- TPS54495PWP
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54495PWP.pdf
- Description:
- IC REG BCK ADJ 4A/2A DL 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,235
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Product details
Overview
TPS54495PWP 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, delivering 4 A on Channel 1 and 2 A on Channel 2. It operates across 4.5 V–18 V input, supports 0.76 V–7 V output voltages, and uses D-CAP2™ adaptive on-time control for fast transient response without external compensation - deployed in digital TV power supplies and networking home terminals.
For engineers reviewing the TPS54495PWP datasheet, TPS54495PWP pinout, TPS54495PWP application, or TPS54495PWP equivalent, key selection criteria include its dual-output capability, thermally compensated cycle-by-cycle over-current protection, non-sinking pre-biased soft start, Eco-mode™ light-load efficiency, and HTSSOP-16 PowerPAD™ package thermal performance.
Technical Context
The TPS54495PWP implements two independent D-CAP2™ control loops - each combining adaptive on-time PWM with internal ramp-based ripple simulation to enable stable operation with ceramic or ultra-low-ESR output capacitors. Its pseudo-fixed 700 kHz switching frequency is derived from VIN and VOUT, eliminating need for external oscillator.
Each channel features loss-less low-side rDS(on) current sensing with thermal compensation (4000 ppm/°C), cycle-by-cycle OCL, hiccup-mode overload protection, and independent EN/SS/VFB pins enabling flexible sequencing and voltage setting. The VREG5 5.5 V LDO powers internal circuitry and bootstraps the high-side gate drivers.
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 | CH1: 4 A continuous, CH2: 2 A continuous - enables point-of-load regulation for multi-rail SoC or FPGA core/I/O supplies. |
| Switching Frequency | ~700 kHz (adaptive on-time) - balances EMI, efficiency, and component size; frequency varies <±5% with VIN/VOUT. |
| Feedback Accuracy | ±0.9% at 25°C (758–773 mV reference) - ensures tight output regulation critical for CPU/GPU core voltage stability. |
| Thermal Shutdown | 155°C threshold with 25°C hysteresis - protects against sustained overload while allowing safe recovery after cooling. |
| Soft-Start Control | Adjustable via external capacitor on SS1/SS2 - enables controlled ramp-up and prevents inrush into pre-biased outputs. |
| Efficiency Mode | Auto-Skip Eco-mode™ - maintains >85% efficiency down to 10 mA load, reducing no-load power dissipation. |
Pinout & Package
TPS54495PWP is housed in a 16-pin HTSSOP (PWP) package with exposed PowerPAD™ thermal pad requiring PCB solder connection for thermal management. Pin numbering follows standard top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 / VIN2 | Power Input | Independent input rails for each channel; connect to bulk decoupling and 0.1 µF local ceramic caps. |
| SW1 / SW2 | Switch Node | Drain connections of high-side and source of low-side FETs; route with minimal loop area for EMI control. |
| VBST1 / VBST2 | Bootstrap Supply | Gate drive boost nodes; require 0.1 µF X5R ceramic cap between VBSTx and corresponding SWx. |
| EN1 / EN2 | Enable Input | CMOS-compatible logic inputs (2.0 V H-threshold, 0.4 V L-threshold); support independent channel sequencing. |
| VFB1 / VFB2 | Feedback Input | Resistor-divider inputs referenced to 0.765 V; tolerate ±0.4 µA bias current and support remote sensing. |
| SS1 / SS2 | Soft-Start Output | Current-source pins (–8.0 µA typ.) charging external capacitor to set startup time and prevent pre-bias sinking. |
| VREG5 | Internal LDO Output | 5.5 V regulated supply powering internal logic and bootstraps; bypass with ≥1 µF X5R ceramic to GND. |
| GND | Signal Ground | Reference node for SSx, VFBx, and analog circuits; connect to PGND at single-point star ground. |
| PGND1 / PGND2 | Power Ground | Low-side FET return paths and current sense references; tie to PowerPAD™ and system ground plane. |
| PowerPAD™ | Thermal Pad | Exposed copper pad (bottom center); must be soldered to ≥4 thermal vias connected to inner ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control Mode | Eliminates external compensation components and enables stable operation with ceramic or POSCAP output capacitors. |
| Integrated FETs | 90 mΩ high-side + 60 mΩ low-side MOSFETs per channel - optimized for low-duty-cycle applications like 1.2 V/3.3 V conversion. |
| Non-Sinking Pre-Biased Soft Start | Prevents reverse current flow during startup when output is already biased; avoids system-level brownout or latch-up. |
| Thermally Compensated OCL | Current limit remains stable across temperature (4000 ppm/°C rDS(on) tracking) - ensures consistent fault protection from –40°C to 85°C. |
| 700 kHz Adaptive Switching | Enables compact magnetics and filtering while maintaining >90% peak efficiency at full load with 12 V input. |
| Hiccup-Mode Overload Protection | Limits junction temperature rise during sustained short-circuit by cycling shutdown/restart - reduces thermal stress vs. latch-off. |
Applications
| Digital TV Power Supply | Networking Home Terminal |
|---|---|
Use Scenario: Powers SoC core (1.2 V), memory I/O (1.8 V), and HDMI PHY (3.3 V) in smart TV mainboards. IC Role / Device Role / Timing Role: Dual-output buck regulator providing isolated, sequenced, and tightly regulated rails with fast load-step response. Use Value: D-CAP2™ control delivers <50 mV undershoot on 3 A load transients, eliminating need for oversized output capacitance. |
Use Scenario: Supplies 3.3 V USB interface and 1.5 V Ethernet PHY in cable modems and DSL gateways. IC Role / Device Role / Timing Role: Dual-channel PMIC managing independent enable timing and soft-start coordination between subsystems. Use Value: Non-sinking pre-biased soft start prevents backfeed from powered USB peripherals during cold boot. |
| Digital Set Top Box (STB) | Gaming Console Core Logic |
Use Scenario: Generates 1.1 V processor core and 1.8 V DDR3 interface rails in HD STB platforms. IC Role / Device Role / Timing Role: High-efficiency dual buck converter supporting Eco-mode™ operation during standby video decode. Use Value: Maintains >87% efficiency at 20 mA load, reducing standby power below 150 mW per rail. |
Use Scenario: Delivers 1.35 V GPU core and 3.3 V peripheral I/O in portable gaming handhelds. IC Role / Device Role / Timing Role: Thermally robust dual regulator using PowerPAD™ HTSSOP package for conduction-cooled PCB layout. Use Value: Junction-to-board thermal resistance of 23.2°C/W enables 4 A continuous operation without forced air. |
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 |
|---|---|---|---|
| TPS544B20RHLT | Single-channel 20 A output, 4.5–18 V input, 0.6–5.5 V output; uses D-CAP3™ control; 3.5 mm × 3.5 mm VQFN-17. | Higher current density but lacks dual independent outputs - requires two devices for same functionality. | Select when needing >4 A per rail or tighter layout constraints; not suitable for independent CH1/CH2 sequencing. |
| MP8765GQ-Z | Dual 4 A/2 A channels, 4.5–18 V input, 0.6–7 V output; constant-on-time control; 4 mm × 4 mm QFN-24. | Higher pin count, no integrated VREG5 LDO, and no pre-biased soft start - requires external bias and sequencing logic. | Choose for cost-sensitive designs where VREG5 integration and pre-bias handling are non-critical. |
Compared with TPS54495PWP, TPS544B20RHLT offers higher per-channel current but eliminates dual-rail flexibility, while MP8765GQ-Z matches output capability but adds design complexity due to missing integrated LDO and pre-bias protection - making TPS54495PWP optimal for compact, robust dual-rail PoL systems.
Availability
TPS54495PWP is available at Aetrix Electronics and suitable for digital TV power supplies, networking home terminals, and digital set-top box designs requiring stable component supply, long-term lifecycle support, and production-ready thermal validation.
Supply support for TPS54495PWP 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 automotive-grade reliability.
The TPS54495 belongs to TI's D-CAP2™ synchronous buck converter product line, engineered for cost-effective, low-component-count point-of-load regulation in consumer electronics with stringent efficiency and transient response requirements.
FAQ
What is the maximum supported input voltage for the TPS54495PWP?
The TPS54495PWP supports an absolute maximum input voltage of 20 V on VIN1 and VIN2 pins, with recommended operating range from 4.5 V to 18 V. Exceeding 18 V continuously may trigger UVLO or reduce reliability; transient spikes up to 20 V are tolerated for ≤100 ns per Absolute Maximum Ratings table.
Does the TPS54495PWP require external compensation components?
No, the TPS54495PWP uses D-CAP2™ adaptive on-time control architecture that eliminates the need for external compensation networks. Stability is maintained inherently across ceramic, POSCAP, and SP-CAP output capacitors without adding RC networks or type-II/III compensators.
How does the TPS54495PWP handle pre-biased outputs during startup?
The TPS54495PWP implements non-sinking pre-biased soft start: when the SSx voltage exceeds the internal VFBx level, it gradually increases low-side FET on-time cycle-by-cycle instead of forcing immediate conduction - preventing reverse current and ensuring monotonic VOx ramp-up from any pre-bias condition.
What thermal management is required for the TPS54495PWP in HTSSOP-16 package?
The TPS54495PWP's HTSSOP-16 package includes an exposed PowerPAD™ thermal pad that must be soldered to PCB ground plane with ≥4 thermal vias (0.3 mm diameter, spaced ≤2 mm apart). This achieves θJB = 23.2°C/W, enabling 4 A continuous operation at 85°C ambient without forced airflow.
Can both channels of the TPS54495PWP be enabled simultaneously?
Yes, both channels can be enabled simultaneously by driving EN1 and EN2 high (≥2.0 V). Independent enable control is also supported - e.g., EN1 high/EN2 low powers only Channel 1 - enabling flexible power sequencing for multi-rail systems without external logic.
TPS54495PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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:
- 4A, 2A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS54495PWP FAQ
1.How can I place an order for TPS54495PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54495PWP 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 TPS54495PWP reliable?
The price and inventory of TPS54495PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54495PWP is usually 5 days.
3.What payment methods are accepted for TPS54495PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54495PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54495PWP?
TPS54495PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54495PWP 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 TPS54495PWP?
For technical support, including TPS54495PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54495PWP requirements.
6.How does Aetrix verify that TPS54495PWP is sourced from the original manufacturer or authorized distributors?
All TPS54495PWP 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 TPS54495PWP meets industry standards.
7.What is the process for return or replacement of TPS54495PWP?
All TPS54495PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54495PWP, 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 TPS54495PWP part is unused and in its original packaging.
Return procedure for TPS54495PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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