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Texas Instruments TPS54495PWPR
- Part No.:
- TPS54495PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54495PWPR.pdf
- Description:
- IC REG BCK ADJ 4A/2A DL 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,327
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Product details
Overview
TPS54495PWPR 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 CH1 and 2 A on CH2. It operates across 4.5 V–18 V input, supports 0.76 V–7 V output, and uses D-CAP2™ adaptive on-time control for fast transient response in point-of-load digital TV and STB power supplies.
For engineers reviewing the TPS54495PWPR datasheet, TPS54495PWPR pinout, TPS54495PWPR application, or TPS54495PWPR equivalent, this page delivers verified specifications, HTSSOP-16 pin mapping, thermal design guidance, soft-start programmability, and validated alternatives for dual-rail POL systems requiring high efficiency at light loads and ceramic-capacitor compatibility.
Technical Context
The TPS54495PWPR implements D-CAP2™ control with adaptive on-time PWM, eliminating external compensation while supporting seamless transition between continuous conduction mode (CCM) and Auto-Skip Eco-mode™ at light loads. Its internal current sensing uses thermally compensated rDS(on)-based low-side FET voltage measurement for accurate OCL.
Each channel features independent enable (EN1/EN2), soft-start (SS1/SS2), and feedback (VFB1/VFB2) pins, with dedicated PGND1/PGND2 and shared SGND for noise isolation. The VREG5 5.5 V LDO powers internal circuitry and bootstraps VBST1/VBST2 via internal diodes, enabling operation without external bias rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide-input industrial and consumer power buses including 5 V, 12 V, and 15 V rails. |
| Output Current | CH1: 4 A / CH2: 2 A - enables independent high-current and medium-current rails from single IC. |
| Switching Frequency | ~700 kHz (adaptive) - pseudo-fixed frequency simplifies EMI filtering while maintaining efficiency across input/output combinations. |
| Feedback Accuracy | ±1.5 mV (758–773 mV at 25°C) - ensures tight output regulation for sensitive digital logic and memory supplies. |
| Thermal Shutdown | 155°C threshold with 25°C hysteresis - protects against sustained overload without latch-up, enabling hiccup-mode recovery. |
| Soft-Start Current | –8.0 µA (typ) into SSx - allows precise ramp time control via external capacitor (e.g., 100 nF = ~12.5 ms). |
| Efficiency Mode | Auto-Skip Eco-mode™ - reduces switching losses below ~200 mA load, achieving >85% efficiency at 10 mA output. |
Pinout & Package
TPS54495PWPR is housed in a 16-pin HTSSOP (PWP) package with exposed PowerPAD thermal pad, requiring soldering to PCB ground plane for thermal management (θJA = 41.4°C/W). 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 4.5–18 V inputs for each channel; connect to bulk capacitors and decoupling networks. |
| SW1, SW2 | Switch Node | Drain-source connection points for internal high/low-side FETs; route with short, low-inductance traces to minimize ringing. |
| VBST1, VBST2 | Bootstrap Supply | Charge pump inputs tied to SWx via 0.1 µF ceramic caps; enable gate drive above VIN for high-side NFETs. |
| EN1, EN2 | Enable Control | CMOS-compatible logic inputs (2.0 V H-threshold); allow independent channel sequencing and power-down. |
| SS1, SS2 | Soft-Start | Current-sink outputs (–8 µA typ); connect to GND via capacitor to program monotonic output ramp time. |
| VFB1, VFB2 | Feedback Input | High-impedance (±0.4 µA) inputs for resistor-divider monitoring of VO1/VO2; reference = 0.765 V. |
| GND, SGND | Signal Ground | Low-noise analog return for VFB/SS pins; must be star-connected to PGND at single point to avoid coupling. |
| PGND1, PGND2 | Power Ground | High-current return paths for low-side FETs and current sensing; tie to PowerPAD and system ground plane. |
| VREG5 | Internal LDO Output | 5.5 V regulated supply for internal logic and VBST bias; bypass with ≥1 µF ceramic cap to SGND. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control | Zero external compensation required - enables stable operation with ceramic or polymer output capacitors down to 20 µF. |
| Non-Sinking Pre-Biased Soft Start | Prevents reverse current flow during startup when VOx is pre-charged - critical for hot-swap and multi-rail sequencing. |
| Loss-Less Current Sensing | rDS(on)-based low-side sensing with thermal compensation - eliminates sense-resistor power loss and layout sensitivity. |
| 700 kHz Adaptive Switching | On-time set by VINx/VOx ratio - maintains consistent frequency across input range without oscillator drift or jitter. |
| Hiccup-Mode Overload Protection | UVP-triggered shutdown with 7× soft-start delay restart - limits junction temperature rise during sustained overloads. |
Applications
| Point-of-Load Regulation | Digital TV Power Supply |
|---|---|
|
Use Scenario: Providing tightly regulated 3.3 V and 1.5 V rails to SoC, DDR memory, and video processing ASICs in compact TV chassis. IC Role / Device Role / Timing Role: Dual-channel buck converter delivering independent, sequenced outputs with <1% load regulation and <50 mV transient deviation. Use Value: Eliminates need for two discrete converters, reducing BOM count by 30% and PCB area by 45% versus discrete solutions. |
Use Scenario: Powering main processor, HDMI interface, and audio codec in smart TVs with dynamic load profiles. IC Role / Device Role / Timing Role: Primary POL regulator with Eco-mode™ extending standby efficiency to >88% at 50 mA load. Use Value: Meets Energy Star Tier 2 standby power requirements (<0.5 W) without auxiliary controllers or external circuitry. |
| Networking Home Terminal | Digital Set-Top Box (STB) |
|
Use Scenario: Generating 1.2 V core and 3.3 V I/O rails for cable modem/router SoCs under bursty Ethernet traffic loads. IC Role / Device Role / Timing Role: Fast-transient dual-buck controller responding to 4 A step changes in <5 µs with <150 mV undershoot. Use Value: Prevents brownout resets during packet bursts, improving QoS and reducing firmware watchdog timeouts. |
Use Scenario: Supplying 1.8 V and 5 V rails to MPEG decoder, tuner, and front-panel display in satellite/cable STBs. IC Role / Device Role / Timing Role: Dual-output regulator with independent EN control enabling staggered power-up of subsystems. Use Value: Enables clean power sequencing per CEA-2037 compliance, avoiding latch-up during cold start. |
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 |
|---|---|---|---|
| TPS544B20RJER | Higher current (15 A CH1, 5 A CH2), 4.5–18 V input, but requires external compensation and larger footprint (QFN-32). | Targeted at server CPU VRMs and high-power FPGA boards - not drop-in for space-constrained STB designs. | Choose when >4 A per channel or tighter phase margin control is needed; avoid if ceramic-cap simplicity is prioritized. |
| MP2451DT-LF-Z | Single-channel 2 A buck, 4.5–28 V input, no integrated VREG5 or Eco-mode - lacks dual-rail capability and pre-biased soft start. | Suitable only for single-rail applications like USB-powered peripherals; cannot replace dual-output functionality. | Select only for cost-sensitive single-output use cases; requires second IC for dual-rail, increasing layout complexity. |
Compared with TPS54495PWPR, TPS544B20RJER offers higher current headroom but sacrifices integration and ease-of-use, while MP2451DT-LF-Z provides lower cost per channel but fails to replicate dual-channel coordination, soft-start safety, or ceramic-cap compatibility - making TPS54495PWPR optimal for balanced performance, size, and design simplicity in consumer electronics POL systems.
Availability
TPS54495PWPR is available at Aetrix Electronics and suitable for digital TV power supplies, networking home terminals, and digital set-top box (STB) applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability screening.
Supply support for TPS54495PWPR 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 and embedded processing technologies, with over 50 years of power management innovation and broad distribution through authorized channels.
The TPS54495 belongs to TI's D-CAP2™ synchronous buck converter product line, designed specifically for high-efficiency, low-component-count point-of-load regulation in space-constrained consumer and networking equipment.
FAQ
What is the maximum recommended output current for each channel of the TPS54495PWPR?
The TPS54495PWPR supports up to 4 A continuous output current on Channel 1 and 2 A on Channel 2 under typical thermal conditions (θJA = 41.4°C/W, TA = 85°C). These ratings assume proper PCB layout with thermal vias to the PowerPAD, adequate copper area, and airflow. Derating is required above 60°C ambient or with restricted airflow; full 4 A/2 A operation is validated with 2.2 µH and 1.5 µH inductors respectively.
Does the TPS54495PWPR require external compensation components?
No, the TPS54495PWPR does not require external compensation components due to its D-CAP2™ control architecture. The internal adaptive on-time loop provides inherent stability with ceramic or low-ESR polymer output capacitors (20–68 µF), eliminating the need for type-II or type-III compensation networks. This reduces BOM count, layout area, and design iteration time compared to traditional voltage-mode or current-mode controllers.
How does the non-sinking pre-biased soft start function in the TPS54495PWPR?
The TPS54495PWPR implements non-sinking pre-biased soft start by detecting when the internal soft-start voltage exceeds the feedback voltage (VFBx) at startup. Instead of forcing current into a pre-charged rail, it gradually increases low-side FET on-time cycle-by-cycle until reaching normal duty-cycle operation. This prevents reverse current flow and output voltage collapse, ensuring safe startup in systems where downstream rails may already be powered - such as hot-pluggable modules or multi-supply systems.
What thermal management practices are required for reliable operation of the TPS54495PWPR?
Reliable operation of the TPS54495PWPR requires soldering the exposed PowerPAD thermal pad to a minimum 200 mm² copper area connected to internal or external ground planes via ≥6 thermal vias (0.3 mm diameter). TI specifies θJA = 41.4°C/W for the PWP package; exceeding 110°C junction temperature under sustained load triggers thermal shutdown. Thermal simulation and IR imaging are recommended for high-power layouts, especially when operating near 4 A/2 A limits at elevated ambient temperatures.
Can the TPS54495PWPR operate with ceramic output capacitors, and what is the minimum recommended value?
Yes, the TPS54495PWPR is explicitly designed for ceramic output capacitors and supports values as low as 20 µF per channel. Its D-CAP2™ control loop remains stable even with ultra-low-ESR ceramics (e.g., X5R/X7R dielectrics), unlike conventional controllers that require ESR-induced ripple for stability. TI recommends 20–68 µF total capacitance per channel, with parallel configurations (e.g., two 22 µF caps) preferred to reduce effective ESR and improve high-frequency transient response.
TPS54495PWPR 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:
- 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
TPS54495PWPR FAQ
1.How can I place an order for TPS54495PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54495PWPR 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 TPS54495PWPR reliable?
The price and inventory of TPS54495PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54495PWPR is usually 5 days.
3.What payment methods are accepted for TPS54495PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54495PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54495PWPR?
TPS54495PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54495PWPR 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 TPS54495PWPR?
For technical support, including TPS54495PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54495PWPR requirements.
6.How does Aetrix verify that TPS54495PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54495PWPR 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 TPS54495PWPR meets industry standards.
7.What is the process for return or replacement of TPS54495PWPR?
All TPS54495PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54495PWPR, 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 TPS54495PWPR part is unused and in its original packaging.
Return procedure for TPS54495PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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