Product Overview

TPS54302DDCR is a highly integrated synchronous step-down converter launched by Texas Instruments, a core model of the TPS54302 series. It adopts an SOT-23-6 package (DDC package, Small Outline Transistor with 6 pins) and is specifically designed for scenarios requiring wide input voltage, high output current, and EMI (Electromagnetic Interference) compatibility. Featuring a 4.5V~28V ultra-wide input voltage range, it can deliver 3A continuous output current and integrates an 85-mΩ high-side NFET and a 40-mΩ low-side NFET. Additionally, it supports EMI-friendly frequency spread spectrum, Advanced Eco-mode™ pulse skipping, and ultra-low 2μA shutdown current. Widely used in industrial distributed power supplies, consumer electronics, automotive auxiliary circuits, and white goods, it is a compact step-down solution that balances high power density, low power consumption, and EMI compatibility, especially suitable for TPS54302DDCR small-space power supply designs.

Key Features

• Ultra-Wide Input Voltage Adaptation: Supports 4.5V~28V single-supply input, directly compatible with industrial 12V/24V distributed buses, automotive 12V batteries, and USB 5V power supplies. No additional boost/buck preprocessing is required, reducing the complexity of TPS54302DDCR cross-scenario power supply design;
• Extreme High Integration: Integrates an 85-mΩ high-side NFET and a 40-mΩ low-side NFET, eliminating the need for external power transistors and driver circuits. It reduces component count by over 30% and PCB area by 40%, adapting to TPS54302DDCR compact power module designs (such as built-in power supplies for consumer electronics);
• Ultra-Low Power Consumption: Features 45μA non-switching quiescent current and 2μA shutdown current. Advanced Eco-mode™ pulse skipping is activated at light loads, increasing efficiency to over 90% and significantly extending the battery life of TPS54302DDCR low-power devices (such as wireless sensors);
• EMI Optimization: Built-in frequency spread spectrum function with ±6% jitter around the 400kHz center frequency, complying with EN 55022 Class B EMI standards. No additional EMI filters are needed, reducing the difficulty of TPS54302DDCR electromagnetic compatibility design;
• Comprehensive Protection Mechanisms: Supports cycle-by-cycle overcurrent protection (hiccup mode) for high-side/low-side, output overvoltage protection (triggered at 108% Vref), 165°C thermal shutdown (10°C hysteresis), and 5ms soft start. It prevents device damage from overload, overvoltage, or high temperature, ensuring the reliability of TPS54302DDCR long-term operation.

Technical Specifications

Parameter Category	Detailed Specifications
Model	TPS54302DDCR
Manufacturer	Texas Instruments
Device Type	Synchronous Step-Down DC-DC Converter (Peak Current Mode Control)
Input Voltage Range	Typical: 4.5V~28V; Absolute Maximum: 30V
Continuous Output Current	3A (TA=25°C, VIN=12V, VOUT=5V)
Integrated MOSFET Parameters	High-Side: 85mΩ (typical, TA=25°C); Low-Side: 40mΩ (typical, TA=25°C)
Switching Frequency (fSW)	Typical: 400kHz; Range: 290kHz~510kHz
Non-Switching Quiescent Current (IQ)	45μA (typical, EN=5V, VFB=1V)
Shutdown Current (IOFF)	2μA (typical, EN=GND)
Operating Junction Temperature (TJ)	-40°C~125°C (Industrial Wide-Temperature Range)
Package Type	SOT-23-6 (DDC Package, Plastic Small Outline Transistor, 6 pins, 1.60mm×2.90mm)
EMI Optimization Feature	Frequency spread spectrum with ±6% jitter (400kHz center frequency)
Protection Functions	High-side/low-side overcurrent protection (hiccup mode, triggered after 512 cycles), output overvoltage protection (108% Vref), thermal shutdown (165°C typical)
Soft-Start Time (tSS)	5ms (typical, internally fixed)
Feedback Voltage (VFB)	Typical: 0.596V; Range: 0.581V~0.611V (TA=25°C)
Light-Load Mode	Advanced Eco-mode™ pulse skipping (triggered when peak inductor current ≤500mA)
Undervoltage Lockout (UVLO)	Rising: 3.8V~4.4V (typical 4.1V); Falling: 3.3V~3.9V (typical 3.6V); Hysteresis: 400mV~560mV
Environmental Standard	Green (RoHS compliant & No Sb/Br)
Lead Plating	Copper-Tin (CU SN)
MSL Rating	Level-1 (260°C Peak Temperature, Unlimited Storage Period)

Typical Applications

• In industrial distributed power systems, TPS54302DDCR serves as a core converter for 12V/24V bus to 5V/3.3V conversion. Its 4.5V~28V wide input adapts to different industrial bus voltages, and the 3A output meets the power needs of sensors and PLC modules. The frequency spread spectrum function reduces EMI interference, avoiding impacts on industrial control signals. Internal integrated MOSFETs reduce peripheral components, adapting to TPS54302DDCR industrial power module compact designs.
• In the field of consumer electronics (such as set-top boxes (STB) and digital televisions (DTV)), the ultra-small SOT-23-6 package of TPS54302DDCR saves PCB space. The 400kHz switching frequency supports small-sized inductors and capacitors (e.g., 10μH inductor + 22μF capacitor). Advanced Eco-mode™ increases efficiency to over 85% at light loads, reducing device standby power consumption and complying with energy efficiency standards, meeting the needs of TPS54302DDCR consumer electronics power supplies.
• In automotive electronic auxiliary circuits (such as on-board USB chargers and lighting control modules), the -40°C~125°C wide temperature range of TPS54302DDCR tolerates temperature changes inside vehicles. The 12V on-board power supply (fluctuating 9V~14.5V) is fully compatible with its input range. Overvoltage protection (108% Vref) resists on-board power spikes, ensuring stable operation of TPS54302DDCR on-board power supplies and avoiding damage to downstream circuits.
• In white goods applications (such as motor control modules for washing machines and refrigerators), the 28V high input voltage of TPS54302DDCR adapts to the 24V power bus of home appliances. The 3A output can drive small motor control chips. Thermal shutdown protection (165°C) prevents device overheating caused by motor overload, and the wide-temperature feature adapts to temperature-fluctuating environments such as kitchens and balconies, improving the reliability of TPS54302DDCR home appliance power supplies.
• In portable industrial equipment (such as handheld detectors and wireless data loggers), the 2μA ultra-low shutdown current of TPS54302DDCR extends battery life (e.g., a 500mAh battery can be stored for 250,000 hours in shutdown mode). The 45μA quiescent current reduces power consumption during standby. The 4.5V input lower limit adapts to the later discharge stage of lithium batteries (a 3.7V lithium battery discharging to 3V requires a boost pre-stage), adapting to TPS54302DDCR portable device power supply needs.

Why Choose TPS54302DDCR ?

• Full Coverage of Cross-Scenario Voltages: The 4.5V~28V input range directly connects to mainstream power buses such as industrial 12V/24V, automotive 12V, and consumer 5V. No additional voltage conversion circuits are needed, reducing TPS54302DDCR cross-scenario adaptation costs and design iterations;
• High Integration for Cost and Efficiency: Integrating 85-mΩ high-side and 40-mΩ low-side MOSFETs eliminates 2 external power transistors and driver resistors, reducing component count by 30% and PCB area by 40% (SOT-23-6 package is only 1.6×2.9mm), balancing TPS54302DDCR cost control and space optimization;
• EMI Optimization Saves Design Time: Built-in ±6% frequency spread spectrum function meets EN 55022 Class B standards without additional EMI filters, reducing electromagnetic compatibility debugging time by over 30% and lowering the difficulty of TPS54302DDCR EMI design;
• Low Power Consumption for High Cost-Effectiveness: 45μA quiescent current + 2μA shutdown current, and Eco-mode™ increases efficiency to 90% at light loads (VIN=12V, IOUT=100mA), 50% lower than traditional step-down converters. It extends device battery life while reducing energy costs, adapting to TPS54302DDCR low-power scenarios;
• Comprehensive Protection Against Risks: High-side/low-side overcurrent protection (typical peak current 5A), 108% Vref overvoltage protection, 165°C thermal shutdown, and 5ms soft start to avoid power-on surges. The device failure rate is as low as 0.001%/1000 hours, ensuring the stability of TPS54302DDCR harsh environment operation.

SUNTOP COMPANY INTRODUCTION

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