My Inquiry
My Account
Texas Instruments TPS54295RSAR
- Part No.:
- TPS54295RSAR
- Manufacturer:
- Texas Instruments
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
TPS54295RSAR.pdf
- Description:
- IC REG BUCK ADJ 2A DL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,190
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS54295RSAR from Texas Instruments is a dual-channel synchronous step-down DC/DC converter IC with integrated 150 mΩ high-side and 100 mΩ low-side N-channel MOSFETs per channel, operating from 4.5 V to 18 V input and delivering up to 2 A per channel at output voltages from 0.76 V to 7 V. It employs D-CAP2™ adaptive on-time control for fast transient response without external compensation and supports ceramic output capacitors in point-of-load applications such as digital TV power supplies and STB systems.
For engineers reviewing the TPS54295RSAR datasheet, TPS54295RSAR pinout, TPS54295RSAR application, or TPS54295RSAR equivalent, this page delivers verified technical context, validated pin functions, confirmed dual-channel buck operation parameters, thermal and protection behavior, and real-world alternative selection guidance - all grounded in TI's production-grade SLVSB01D datasheet (Rev. D, August 2016).
Technical Context
The TPS54295RSAR implements dual independent D-CAP2™ control loops, each using adaptive on-time modulation with internal ramp injection to enable stable operation with ultra-low-ESR ceramic capacitors and eliminate need for external loop compensation. Its 700-kHz pseudo-fixed switching frequency is dynamically set by VIN/VOUT ratio, not a crystal or oscillator.
Each channel integrates lossless low-side rDS(ON) current sensing with thermally compensated OCP, cycle-by-cycle valley detection, and non-latching overcurrent protection. Protection suite includes OVP (120% VREF), UVP (68% VREF), UVLO (3.83 V on VREG5), and thermal shutdown (155°C with 25°C hysteresis), all implemented in hardware without software intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and consumer DC bus inputs including 5 V, 12 V, and 15 V rails. |
| Output Voltage Range | 0.76 V to 7 V - programmable via resistor divider on VFBx pins; enables core voltage regulation for SoCs and FPGAs. |
| Max Output Current | 2 A per channel - sustained continuous output with thermal derating per RθJA = 34.9°C/W (VQFN package). |
| Switching Frequency | 700 kHz nominal - pseudo-fixed frequency determined by VIN/VOUT ratio; enables compact magnetics and predictable EMI profile. |
| FET On-Resistance | 150 mΩ (HS), 100 mΩ (LS) - optimized for low-duty-cycle operation; reduces conduction loss at typical 1.2–3.3 V outputs. |
| Feedback Reference | 765 mV ±7 mV - high-accuracy internal reference enables ±1% output regulation over line/load/temperature. |
| Soft-Start Current | –8 µA (sink) on SSx pins - enables precise soft-start timing via external capacitor; supports prebiased startup. |
| Thermal Shutdown | 155°C trip with 25°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
TPS54295RSAR is packaged in a 4 mm × 4 mm, 16-pin VQFN (RSA) with exposed thermal pad soldered to GND for optimal heat dissipation. Pin numbering follows standard top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 / VIN2 | Power Input (Ch1 / Ch2) | High-current inputs tied to high-side FET drains; require local 10-µF ceramic bypassing near each pin. |
| SW1 / SW2 | Switch Node (Ch1 / Ch2) | Drain-source connection of both FETs; critical for layout - minimize loop area to reduce EMI and ringing. |
| VBST1 / VBST2 | Bootstrap Supply (Ch1 / Ch2) | Supplies gate drive for high-side FETs; requires 0.1-µF ceramic capacitor between VBSTx and corresponding SWx. |
| VFB1 / VFB2 | Feedback Input (Ch1 / Ch2) | Resistor-divider input referenced to 765 mV; high-impedance node - route away from noise sources. |
| EN1 / EN2 | Enable Input (Ch1 / Ch2) | Logic-level enable with 2 V H-threshold and 0.4 V L-threshold; internal 450 kΩ pull-down ensures default disable. |
| SS1 / SS2 | Soft-Start Control (Ch1 / Ch2) | Sink current (–8 µA) charges external capacitor; sets monotonic startup time and enables prebiased operation. |
| PGND1 / PGND2 | Power Ground (Ch1 / Ch2) | Low-side FET source return; separate from signal GND - connect to thermal pad and input/output caps at single point. |
| GND | Signal Ground | Analog reference for SSx, VFBx, and ENx; must tie to PGND at single-point star ground to avoid noise coupling. |
| VREG5 | 5.5-V Linear Regulator Output | Internal LDO powered from VIN1; supplies bias for internal circuitry and can power external logic (75 mA max). |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Adaptive On-Time Control | Enables zero-external-compensation design with <10 µs load transient response and stable operation with ceramic capacitors. |
| Auto-Skip Eco-mode™ | Automatically transitions from PWM to pulse-skipping at light loads, maintaining >85% efficiency down to 10 mA per channel. |
| Lossless Low-Side Current Sensing | Uses rDS(ON) of low-side FET with 4000 ppm/°C thermal compensation - eliminates sense resistor and associated losses. |
| Non-Sinking Prebiased Soft Start | Prevents reverse current flow during startup into precharged outputs by incrementally enabling synchronous rectification. |
| Comprehensive Hardware Protection | Includes cycle-by-cycle OCP, OVP/UVP (120%/68% thresholds), UVLO (3.83 V), and thermal shutdown - no firmware required. |
| Integrated 5.5-V LDO (VREG5) | Provides regulated bias rail for internal logic and external circuits; active only when VIN1 > 6 V and draws <2 mA quiescent current. |
Applications
| Digital TV Power Supply | Networking Home Terminal |
|---|---|
|
Use Scenario: Dual-rail power for main SoC (3.3 V) and memory interface (1.5 V) in 4K UHD television platforms. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated, low-noise DC from 12-V intermediate bus. Use Value: D-CAP2™'s fast transient response prevents brownout during video frame bursts; Eco-mode extends standby efficiency. |
Use Scenario: Compact dual-output supply for cable modem/router SoC and USB PHY in space-constrained residential gateways. IC Role / Device Role / Timing Role: Dual synchronous buck converter managing independent enable sequencing and soft-start for subsystem isolation. Use Value: Integrated VREG5 powers auxiliary logic; lossless current sensing enables accurate load monitoring without added components. |
| Digital Set-Top Box (STB) | Gaming Console Subsystem |
|
Use Scenario: Powering ARM-based media processor and HDMI transmitter in low-power STB designs requiring <1 W standby consumption. IC Role / Device Role / Timing Role: Dual-channel buck controller with independent EN/SS pins enabling staggered power-up and thermal management. Use Value: Prebiased soft start avoids output droop during hot-plug events; 700-kHz switching allows small 1.5-µH inductors and minimal footprint. |
Use Scenario: Secondary power stage for GPU voltage tracking and audio codec supply in portable gaming devices. IC Role / Device Role / Timing Role: High-efficiency dual buck regulator supporting dynamic voltage scaling (DVS) via feedback resistor reconfiguration. Use Value: 0.76 V minimum output supports advanced low-voltage cores; thermal shutdown prevents damage during thermal throttling events. |
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 |
|---|---|---|---|
| TPS54294RSAR | Same pinout and package, but rated for 3-A per channel; higher rDS(ON) (120 mΩ HS / 70 mΩ LS) and 600-kHz fSW. | Better suited for higher-current loads (>2 A) where efficiency at full load is prioritized over light-load Eco-mode performance. | Select TPS54294RSAR if output current demand exceeds 2 A per rail and board layout accommodates higher thermal load. |
| MP2492D-LF-Z | Monolithic dual 2-A buck with 500-kHz fixed frequency; lacks D-CAP2, requires external compensation; no integrated VREG5 LDO. | Requires more external components and offers slower transient response; suitable where fixed-frequency EMI control is mandatory. | Choose MP2492D-LF-Z only when strict EMI spectral shaping is required and design team has experience tuning Type-II/III compensators. |
Compared with TPS54295RSAR, TPS54294RSAR provides higher current headroom at the cost of reduced light-load efficiency, while MP2492D-LF-Z trades integrated control simplicity for fixed-frequency predictability and external loop flexibility - neither is pin-compatible, and both require PCB redesign.
Availability
TPS54295RSAR is available at Aetrix Electronics and suitable for digital TV power supplies, networking home terminals, digital set-top boxes, and gaming console subsystems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54295RSAR 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-reliability power conversion solutions.
The TPS54295RSAR belongs to TI's D-CAP2™ synchronous buck converter product line, designed specifically for space-constrained, multi-rail consumer and industrial point-of-load applications demanding fast transient response, high efficiency across load range, and minimal external component count.
FAQ
What is the maximum recommended junction temperature for continuous operation of the TPS54295RSAR?
The TPS54295RSAR has a maximum recommended operating junction temperature of 125°C per its Recommended Operating Conditions table. Thermal shutdown activates at 155°C with 25°C hysteresis, but sustained operation above 125°C risks long-term reliability degradation. For reliable 2-A-per-channel operation in the 4 mm × 4 mm VQFN package, maintain RθJA ≤ 34.9°C/W via proper PCB copper area and thermal vias under the exposed pad. The TPS54295RSAR datasheet specifies derating curves starting at 85°C ambient.
Does the TPS54295RSAR support independent enable and soft-start control for each channel?
Yes, the TPS54295RSAR provides fully independent control for both channels: EN1/EN2 and SS1/SS2 are separate pins with dedicated internal circuitry. Each EN pin has its own 2-V H-threshold and 0.4-V L-threshold, and each SS pin sinks –8 µA to charge an external capacitor. This allows staggered power-up sequences, individual fault recovery, and prebiased startup on one channel while the other remains disabled - a key capability confirmed in Section 7.3.4 of the SLVSB01D datasheet.
Can the TPS54295RSAR operate with only one channel enabled while the other is disabled?
Yes, the TPS54295RSAR supports single-channel operation with the other channel fully disabled. Pulling EN1 low disables Channel 1 while leaving Channel 2 operational via EN2, and vice versa. Both channels share the same VREG5 LDO (powered from VIN1), but their control loops, current sensing, and protection circuits remain fully isolated. No cross-talk or instability occurs, as verified in functional testing described in Section 7.4.3 (Standby Operation) of the official datasheet.
What output capacitor types are compatible with the TPS54295RSAR's D-CAP2™ control architecture?
The TPS54295RSAR's D-CAP2™ control is explicitly validated for use with ultra-low-ESR ceramic capacitors (e.g., X5R/X7R 0805 or 1206), polymer capacitors (POSCAP/SP-CAP), and mixed-ceramic+polymer configurations. Unlike traditional voltage-mode controllers, D-CAP2™ does not require ESR-induced ripple for stability - it injects an internal ramp to simulate ripple. TI's datasheet confirms stable operation with 10-µF ceramic + 22-µF polymer combinations, and recommends ≥1 µF ceramic on VREG5.
How does the TPS54295RSAR implement overcurrent protection without a sense resistor?
The TPS54295RSAR uses lossless, temperature-compensated rDS(ON) current sensing on the low-side FET. During the low-side conduction phase, the voltage between SWx and PGNDx is measured and scaled to reflect switch current. To maintain accuracy across temperature, the sensing circuit applies 4000 ppm/°C compensation - matching the FET's rDS(ON) drift - as documented in Section 7.3.5 and Electrical Characteristics Table (IOCL = 2.7–4.5 A). This eliminates external sense resistors and associated power loss.
TPS54295RSAR 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)
TPS54295RSAR FAQ
1.How can I place an order for TPS54295RSAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54295RSAR 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 TPS54295RSAR reliable?
The price and inventory of TPS54295RSAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54295RSAR is usually 5 days.
3.What payment methods are accepted for TPS54295RSAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54295RSAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54295RSAR?
TPS54295RSAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54295RSAR 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 TPS54295RSAR?
For technical support, including TPS54295RSAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54295RSAR requirements.
6.How does Aetrix verify that TPS54295RSAR is sourced from the original manufacturer or authorized distributors?
All TPS54295RSAR 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 TPS54295RSAR meets industry standards.
7.What is the process for return or replacement of TPS54295RSAR?
All TPS54295RSAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54295RSAR, 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 TPS54295RSAR part is unused and in its original packaging.
Return procedure for TPS54295RSAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS54295RSAR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
