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Texas Instruments TPS54295RSAT
- Part No.:
- TPS54295RSAT
- Manufacturer:
- Texas Instruments
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
TPS54295RSAT.pdf
- Description:
- IC REG BUCK ADJ 2A DL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:475
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Product details
Overview
TPS54295 from Texas Instruments is a dual-channel, 2-A synchronous step-down DC/DC converter with integrated high-side (150 mΩ) and low-side (100 mΩ) N-channel MOSFETs, D-CAP2™ control mode, 700-kHz switching frequency, and 0.76–7-V output voltage range. It delivers point-of-load regulation for digital TV power supplies, STBs, and gaming consoles.
For engineers reviewing the TPS54295 datasheet, TPS54295 pinout, TPS54295 application, or TPS54295 equivalent, key selection considerations include dual-channel adaptive on-time control, lossless low-side current sensing, non-sinking prebiased soft start, Eco-mode efficiency at light load, and thermal shutdown at 155°C.
Technical Context
The TPS54295 implements adaptive on-time D-CAP2 control-no external compensation required-with pseudo-fixed 700-kHz operation derived from VIN/VOUT ratio. Each channel features independent enable (EN1/EN2), soft-start (SS1/SS2), and feedback (VFB1/VFB2) pins, supporting seamless PWM-to-Eco-mode transition.
It integrates a 5.5-V linear regulator (VREG5) powered from VIN1, provides cycle-by-cycle overcurrent protection via thermally compensated rDS(ON) sensing, and includes OVP (120% trip), UVP (68% trip), UVLO (3.83 V), and thermal shutdown (155°C) with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide-input industrial and consumer DC bus rails including 5 V, 12 V, and 15 V systems. |
| Output Voltage Range | 0.76 V to 7 V - programmable via resistor divider on VFBx, enabling core logic (1.5 V), I/O (3.3 V), and analog (5 V) rails. |
| Max Output Current per Channel | 2 A continuous - sustained by integrated 150 mΩ/100 mΩ MOSFETs with thermal derating per RθJA (47.5°C/W HTSSOP). |
| Switching Frequency | 700 kHz nominal - adaptive on-time control maintains stable frequency across input/output combinations without external oscillator. |
| Feedback Reference Voltage | 765 mV ±7 mV - high-accuracy reference enables tight output regulation (±1% typical over temp and line). |
| Current Limit Threshold | 3.9 A typical - cycle-by-cycle valley-current limiting using lossless low-side rDS(ON) sensing with thermal compensation. |
| Soft-Start Current | –8 µA typical - precise 8-µA sink enables accurate, adjustable soft-start timing via external capacitor on SSx pin. |
| Thermal Shutdown | 155°C activation with 25°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
TPS54295 is available in two thermally enhanced packages: 16-pin HTSSOP (PWP, 5.0 × 4.4 mm) and 16-pin VQFN (RSA, 4.0 × 4.0 mm), both featuring exposed thermal pads soldered to GND for optimal heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Power Input | Independent 4.5–18 V inputs for each buck channel; VIN1 powers internal 5.5-V LDO (VREG5). |
| SW1, SW2 | Switch Node | Drain connections of high-side/low-side FETs; require low-inductance layout and ceramic bootstrap caps (0.1 µF) to VBSTx. |
| VBST1, VBST2 | Bootstrap Supply | Gate drive supply for high-side FETs; internally diode-clamped to VREG5, requires 0.1-µF ceramic cap to respective SWx. |
| VFB1, VFB2 | Feedback Input | Resistor-divider sense node for output regulation; 765-mV reference enables precision voltage setting with <±1% accuracy. |
| EN1, EN2 | Enable Control | Active-high logic inputs (2 V H-threshold, 0.4 V L-threshold); independent channel control enables sequencing and power gating. |
| SS1, SS2 | Soft-Start | Capacitor-programmable soft-start pins; 8-µA internal current source sets ramp time and prevents inrush during startup. |
| PGND1, PGND2 | Power Ground | Low-side FET source returns and current-sense reference; must be routed separately from signal ground to avoid noise coupling. |
| GND | Signal Ground | Analog reference return for SSx, VFBx, and ENx; connect to PGND at single-point star ground near IC. |
| VREG5 | Integrated LDO Output | 5.5-V, 75-mA regulated supply for external circuitry; active only when VIN1 > UVLO threshold (3.83 V). |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control Mode | Eliminates need for external compensation components while maintaining stability with ceramic or polymer output capacitors. |
| Auto-Skip Eco-mode™ | Enables >85% efficiency at 10-mA load by entering pulse-skipping mode below CCM boundary, reducing quiescent current. |
| Non-Sinking Prebiased Soft Start | Prevents reverse current flow into precharged outputs by ramping low-side gate drive duty cycle incrementally during startup. |
| Lossless Low-Side Current Sensing | Uses thermally compensated rDS(ON) of integrated low-side FET for accurate, drift-free overcurrent detection without sense resistor. |
| Comprehensive Protection Suite | Includes cycle-by-cycle OCP, output OVP/UVP (120%/68%), input UVLO (3.83 V), and thermal shutdown (155°C) with auto-recovery. |
| Adaptive Gate Drivers | Integrates boost PMOS switch and optimized drive strength to ensure fast, robust switching of 150/100-mΩ FETs across temperature. |
Applications
| Digital TV Power Supply | Networking Home Terminal |
|---|---|
Use Scenario: Dual-rail power for SoC (1.2 V core), memory interface (1.5 V), and HDMI PHY (3.3 V) in compact set-top box designs. IC Role / Device Role / Timing Role: Dual synchronous buck regulator delivering tightly regulated, sequenced, low-noise DC rails with minimal BOM count. Use Value: Eliminates discrete controllers and external compensation, reduces solution size by 30%, and maintains <±1% output accuracy under dynamic load steps. |
Use Scenario: Power management for cable modem/router with ARM processor, Ethernet PHY, and USB peripherals requiring independent 1.8 V and 3.3 V supplies. IC Role / Device Role / Timing Role: Dual-channel point-of-load regulator with independent EN/SS control enabling flexible power sequencing and standby isolation. Use Value: Achieves >90% peak efficiency at full load and >85% at 10 mA via Eco-mode, extending system runtime in always-on residential gateways. |
| Digital Set-Top Box (STB) | Gaming Console Subsystem |
Use Scenario: Compact, fanless STB requiring low-temperature rise and low acoustic noise from power stage under bursty video decoding loads. IC Role / Device Role / Timing Role: Dual buck converter operating in D-CAP2 mode to deliver fast transient response (<10 µs) to CPU/GPU voltage droops. Use Value: Reduces required output capacitance by 40% versus voltage-mode controllers due to inherent ripple rejection and zero-ESR compatibility. |
Use Scenario: Secondary power rail generation for audio codec, sensor hub, or wireless module in handheld gaming devices with strict thermal envelope. IC Role / Device Role / Timing Role: Highly integrated dual buck with VREG5 LDO powering auxiliary circuitry, minimizing external regulators and decoupling. Use Value: Integrated 5.5-V/75-mA LDO eliminates need for separate linear regulator, saving board space and simplifying BOM for subsystem power domains. |
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 |
|---|---|---|---|
| TPS54229E | Single-channel 2-A buck with identical D-CAP2 control, same pinout family but no second channel or VREG5 LDO. | Suitable only where dual-rail capability is not required; lacks independent EN2/SS2/VFB2 and VREG5 output. | Select when system needs only one regulated rail and space/power constraints favor single-channel integration. |
| MP2492 | Dual 2-A buck from Monolithic Power Systems; uses constant-on-time control but requires external compensation and lacks VREG5 LDO. | No integrated 5.5-V bias rail; different pin assignment (e.g., no dedicated VREG5 pin); lower max input (17 V vs 18 V). | Choose if cost sensitivity outweighs feature parity, and design team has experience validating external loop compensation. |
Compared with TPS54295, TPS54229E offers identical performance per channel but omits dual-channel functionality and VREG5, while MP2492 provides dual output at lower cost but increases design complexity through external compensation and missing integrated bias supply.
Availability
TPS54295 is available at Aetrix Electronics and suitable for digital TV power supplies, networking home terminals, and digital set-top boxes requiring stable component supply, long-term lifecycle support, and automotive-grade reliability screening.
Supply support for TPS54295 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 TPS54295 belongs to TI's D-CAP2™ synchronous buck converter product line, designed specifically for space-constrained, multi-rail consumer and industrial applications demanding fast transient response, low quiescent current, and minimal external components.
FAQ
What is the maximum input voltage rating for the TPS54295?
The TPS54295 has an absolute maximum input voltage rating of 20 V on VIN1 and VIN2 pins, but its recommended operating range is 4.5 V to 18 V. Operation above 18 V may trigger overvoltage protection or reduce reliability; sustained use beyond 18 V is not advised per datasheet specifications.
Does the TPS54295 support prebiased output startup?
Yes, the TPS54295 implements non-sinking prebiased soft start. When the output is precharged, the controller avoids sinking current by gradually increasing low-side FET on-time cycle-by-cycle until reaching normal regulation, preventing output voltage collapse during startup.
How is the switching frequency determined in the TPS54295?
The TPS54295 uses adaptive on-time D-CAP2 control with no internal oscillator. Its nominal switching frequency is 700 kHz, set dynamically by the ratio of VOUTx/VINx. Frequency remains stable across input and load variations due to this adaptive timing scheme.
What package options are available for the TPS54295?
The TPS54295 is offered in two RoHS-compliant packages: 16-pin HTSSOP (PWP, 5.0 × 4.4 mm) and 16-pin VQFN (RSA, 4.0 × 4.0 mm). Both include exposed thermal pads that must be soldered to GND for thermal performance compliance.
Can the TPS54295 operate with ceramic output capacitors?
Yes, the TPS54295 is explicitly designed for compatibility with ultra-low-ESR ceramic capacitors due to its D-CAP2 control architecture. No additional ESR or external compensation components are needed-unlike traditional voltage-mode controllers.
TPS54295RSAT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 16-VQFN Exposed Pad
- 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:
- 2A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
TPS54295RSAT FAQ
1.How can I place an order for TPS54295RSAT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54295RSAT 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 TPS54295RSAT reliable?
The price and inventory of TPS54295RSAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54295RSAT is usually 5 days.
3.What payment methods are accepted for TPS54295RSAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54295RSAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54295RSAT?
TPS54295RSAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54295RSAT 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 TPS54295RSAT?
For technical support, including TPS54295RSAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54295RSAT requirements.
6.How does Aetrix verify that TPS54295RSAT is sourced from the original manufacturer or authorized distributors?
All TPS54295RSAT 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 TPS54295RSAT meets industry standards.
7.What is the process for return or replacement of TPS54295RSAT?
All TPS54295RSAT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54295RSAT, 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 TPS54295RSAT part is unused and in its original packaging.
Return procedure for TPS54295RSAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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