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Texas Instruments TPS54302DDCR
- Part No.:
- TPS54302DDCR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS54302DDCR.pdf
- Description:
- IC REG BUCK ADJ 3A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:11,536
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Product details
Overview
TPS54302DDCR from Texas Instruments is a 4.5V to 28V input, 3A synchronous step-down DC/DC converter in SOT-23-THIN (6-pin) package, featuring integrated 85mΩ high-side and 40mΩ low-side MOSFETs, fixed 400kHz switching frequency, and frequency spread spectrum for EMI reduction. It delivers regulated 5V/3A output in industrial power-bus and consumer audio/STB applications.
For engineers reviewing the TPS54302DDCR datasheet, TPS54302DDCR pinout, TPS54302DDCR application, or TPS54302DDCR equivalent, key selection criteria include its 2μA shutdown current, internal 5ms soft-start, Eco-mode pulse skip for light-load efficiency, peak current-mode control with internal compensation, and thermal/hiccup-mode overcurrent protection.
Technical Context
The TPS54302DDCR implements fixed-frequency (400kHz) peak current-mode control with internal slope compensation to prevent subharmonic oscillation across duty cycles. Its error amplifier features 240µA/V transconductance and internal frequency compensation, eliminating external compensation components.
It integrates boot UVLO (2.1V typical), VIN UVLO (4.1V rising threshold with 480mV hysteresis), and dual overcurrent protection: cycle-by-cycle high-side limiting (5A typical) plus low-side valley-current limiting (4A typical), triggering hiccup mode after 512 cycles of sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports 12V/24V distributed bus systems without external pre-regulation |
| Continuous Output Current | 3A - delivered via integrated 85mΩ/40mΩ MOSFET pair with minimal external components |
| Switching Frequency | 400kHz (±110kHz) - enables compact magnetics while balancing efficiency and EMI |
| Quiescent Current | 45μA (non-switching) - extends battery life in always-on industrial monitoring nodes |
| Shutdown Current | 2μA - ensures ultra-low standby power in energy-sensitive applications |
| Feedback Reference Voltage | 0.596V ±15mV - sets precise output regulation with standard 1% resistor dividers |
| Soft-Start Time | 5ms (internal) - prevents inrush current damage to input capacitors and upstream supplies |
Pinout & Package
SOT-23-THIN (6-pin) package measuring 2.9mm × 2.8mm with exposed pad for thermal performance; pin-compatible with industry-standard SOT-23 footprint but optimized for high-power density.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 3) | Input supply rail | Connects to 4.5–28V source; drain terminal of high-side MOSFET and primary power input |
| GND (Pin 1) | Power and signal ground | Source of low-side MOSFET and controller reference; requires single-point FB grounding for stability |
| SW (Pin 2) | Switch node | Connection between high- and low-side MOSFETs; drives external bootstrap capacitor and inductor |
| BOOT (Pin 6) | High-side gate drive supply | Requires 0.1µF ceramic cap to SW; monitored by internal UVLO (2.1V) to disable HS FET if insufficient |
| FB (Pin 4) | Feedback input | Resistor-divider connection point; compares output voltage to 0.596V reference for regulation |
| EN (Pin 5) | Enable control | Logic-level input (1.23V rising threshold); float to enable; supports external UVLO configuration via resistive divider |
Key Features
| Feature | Design Value |
|---|---|
| Frequency Spread Spectrum | ±6% jitter around 400kHz at 1/512 modulation rate - reduces peak EMI by >10dB without filter redesign |
| Advanced Eco-mode Pulse Skip | Activates below 500mA peak inductor current - maintains >85% efficiency at 10mA load vs. forced PWM |
| Integrated Boot Recharge Diode | Eliminates external diode - simplifies layout and improves reliability in space-constrained designs |
| Internal Loop Compensation | Fixed Type II network - removes need for external compensation components, reducing BOM count by ≥3 parts |
| Hiccup-Mode Overcurrent Protection | 512-cycle wait + 16384-cycle restart delay - limits thermal stress during sustained short-circuit events |
Applications
| Industrial Power Bus | Consumer Audio Systems |
|---|---|
Use Scenario: Distributed 24V rail powering multiple subsystems in factory automation controllers. IC Role / Device Role / Timing Role: Primary 5V/3A point-of-load regulator converting 24V bus to MCU, sensor, and interface logic supply. Use Value: EMI-friendly operation meets CISPR-22 Class B limits without added shielding; 2μA shutdown enables remote wake-up capability. |
Use Scenario: Compact powered speaker with digital amplifier and DSP requiring clean, low-noise 5V supply. IC Role / Device Role / Timing Role: Main DC/DC converter delivering stable 5V to Class-D amplifier IC and audio codec. Use Value: 45μA quiescent current minimizes standby power draw; spread spectrum avoids audible beat frequencies in sensitive analog stages. |
| Set-Top Box (STB) | Thermal Printer Power |
Use Scenario: Multi-rail STB design needing isolated 5V for HDMI PHY and USB peripherals from shared 12V input. IC Role / Device Role / Timing Role: Secondary buck regulator providing regulated 5V output with fast transient response to burst data loads. Use Value: Peak current-mode control achieves <5% output deviation on 1.5A load steps; internal soft-start prevents HDMI hot-plug reset glitches. |
Use Scenario: Portable thermal printer with battery-backed operation requiring efficient 5V rail for print head driver and MCU. IC Role / Device Role / Timing Role: High-efficiency step-down converter supplying 3A peak current during print head activation pulses. Use Value: Eco-mode extends battery runtime by 3× vs. forced PWM at idle; SOT-23-THIN footprint saves PCB area in slim form factor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2307DN-LF-Z | 36V max input, 2A output, no spread spectrum, 300kHz fixed frequency | Lacks EMI-reduction features; lower current rating limits use in 3A+ loads | Choose when cost sensitivity outweighs EMI compliance requirements and output current ≤2A |
| RT7295BGJ6F | 30V max input, 3A output, 500kHz switching, no integrated soft-start timer | Requires external soft-start circuitry; higher switching frequency increases core losses at high VIN | Prefer when higher frequency allows smaller inductors and layout constraints permit external timing components |
Compared with MP2307DN-LF-Z and RT7295BGJ6F, the TPS54302DDCR uniquely combines 28V/3A capability, integrated 5ms soft-start, spread-spectrum EMI reduction, and 2μA shutdown-making it optimal for space-constrained, noise-sensitive industrial and consumer power rails where reliability and regulatory compliance are critical.
Availability
TPS54302DDCR is available at Aetrix Electronics and suitable for industrial automation controllers, consumer audio amplifiers, set-top boxes, and thermal printers requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for TPS54302DDCR 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 technologies, with decades of expertise in high-reliability power conversion ICs.
The TPS54302DDCR belongs to TI's EMI-optimized synchronous buck converter product line, engineered specifically for noise-sensitive industrial and consumer applications where compact size, low standby power, and regulatory-compliant emissions are mandatory design requirements.
FAQ
What is the maximum input voltage rating for the TPS54302DDCR?
The TPS54302DDCR has an absolute maximum input voltage rating of 30V, with recommended operating range from 4.5V to 28V. Exceeding 30V risks permanent damage per TI's Absolute Maximum Ratings table. The device incorporates VIN UVLO with 4.1V rising threshold and 480mV hysteresis to ensure safe startup and brownout recovery within its specified range. Always maintain input transient suppression below 30V.
Does the TPS54302DDCR require external compensation components?
No, the TPS54302DDCR features fully internal loop compensation designed for standard output capacitor ESR ranges. Its integrated Type II compensation network eliminates the need for external RC networks on the COMP pin, reducing BOM count and layout complexity. This internal design is validated for stability with typical 22µF ceramic output capacitors and 10µH inductors across the full 4.5–28V input range.
How does the TPS54302DDCR achieve EMI reduction?
The TPS54302DDCR reduces electromagnetic interference through frequency spread spectrum modulation-jittering the 400kHz switching frequency by ±6% at a 1/512 modulation rate. This spreads energy across a wider bandwidth, lowering peak emissions by >10dB compared to fixed-frequency operation. Combined with integrated MOSFETs and optimized pinout, it meets CISPR-22 Class B without additional filtering in typical layouts.
What is the purpose of the BOOT pin on the TPS54302DDCR?
On the TPS54302DDCR, the BOOT pin supplies gate-drive voltage to the high-side MOSFET via an external 0.1µF ceramic capacitor connected to the SW node. It is actively monitored by an internal UVLO circuit (2.1V threshold) that disables the high-side FET if boot voltage collapses-preventing shoot-through and ensuring robust operation during startup, load transients, and low-duty-cycle conditions.
Can the TPS54302DDCR safely start into a prebiased output?
Yes, the TPS54302DDCR includes safe start-up logic that prevents the low-side MOSFET from discharging a prebiased output. During monotonic startup, both high-side and low-side FETs remain off until the internal soft-start voltage exceeds the FB pin voltage. This feature protects downstream circuitry and ensures controlled ramp-up even when the output is initially held at 5V by external sources or hold-up capacitors.
TPS54302DDCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 0.596V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 3A
- Frequency - Switching:
- 400kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS54302DDCR FAQ
1.How can I place an order for TPS54302DDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54302DDCR 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 TPS54302DDCR reliable?
The price and inventory of TPS54302DDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54302DDCR is usually 5 days.
3.What payment methods are accepted for TPS54302DDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54302DDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54302DDCR?
TPS54302DDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54302DDCR 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 TPS54302DDCR?
For technical support, including TPS54302DDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54302DDCR requirements.
6.How does Aetrix verify that TPS54302DDCR is sourced from the original manufacturer or authorized distributors?
All TPS54302DDCR 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 TPS54302DDCR meets industry standards.
7.What is the process for return or replacement of TPS54302DDCR?
All TPS54302DDCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54302DDCR, 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 TPS54302DDCR part is unused and in its original packaging.
Return procedure for TPS54302DDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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