Core specifications
TPS5430DDAR is a non-synchronous buck converter integrating low-impedance high-side N-channel MOSFET. The core parameters are as follows:
voltage and current: Input voltage range5.5V to 36V, supports direct supply of wide voltage power supply such as 24V industrial bus.The output is adjustable and can be adjusted to a minimum of1.221V, up to32.04V.Continuous output current up to3A, can withstand short-term4APeak current.
Efficiency vs. switching frequency: Thanks to the built-in110mΩLow impedance MOSFET switch with typical conversion efficiency up to95%.Fixed500kHzThe switching frequency can ensure the filtering effect with smaller inductor and capacitor sizes.
Protection and Encapsulation: Integrate multiple protection mechanisms such as cycle-by-cycle overcurrent limit, overvoltage protection and thermal shutdown.Operating temperature range covered-40℃ to 125℃.adopt8-pin SO PowerPAD™ package (4.90×3.90mm), with its own heat dissipation pad on the bottom, which can achieve efficient heat dissipation in the limited PCB space.
Core advantages: wide voltage and large current, stable operation
The core competitiveness of TPS5430DDAR is concentrated in the combination of wide voltage, high current and high integration.There are many similar types of 36V step-down chips on the market, but only a handful of models can be shipped in batches and withstand the test of the market for ten years.It has a built-in soft-start circuit to limit surge current, and improves transient response through voltage feedforward technology. When faced with a sudden change in load, the output voltage can quickly return to normal, which has obvious advantages in dynamic load situations such as motor start and stop, radio frequency power amplifier, etc.
In addition, the chip is highly integrated and the feedback loop has been internally compensated, requiring onlyInductor, output capacitor and voltage divider resistorA complete buck circuit can be formed with a small number of peripheral components.With the ENA enable pin, the shutdown current can be reduced to15μAThe following effectively extends battery life in hibernation and standby scenarios.
Typical application scenarios
The TPS5430DDAR has a wide range of applications, and is especially suitable for medium-power applications that need to step down the 12V/24V high-voltage bus to low-voltage rails such as 5V and 3.3V.Industrial control and automation equipmentIt is one of its core application directions.In PLC, industrial sensors, motor drivers, and 24V bus-powered control systems, this chip provides a stable 5V or 3.3V power rail for logic circuits, communication modules, and actuators, and has been proven in batch applications in industrial fields with high vibration and wide temperature differences.Automotive Electronics and Vehicle SystemsIt is used as the front-stage step-down power supply for in-vehicle infotainment systems, driving recorders and ADAS assisted driving systems. The 36V wide-voltage input can withstand the fluctuations of 12V/24V battery systems and load dump impacts. The internal integrated thermal shutdown and short-circuit protection mechanisms can also ensure driving safety.Communication equipment and network terminalsAmong them, routers, switches, 5G CPE, DSL modems and other equipment need to operate continuously for a long time. TPS5430DDAR provides low-noise, high-efficiency and stable power supply for their PHY chips, Wi-Fi RF power amplifiers and main control SoCs.Consumer electronics, digital cameras, portable instrumentsThis chip is also widely used in other scenarios. The 500kHz switching frequency effectively avoids audio noise and can be widely used in televisions, digital set-top boxes, audio equipment, optical transceivers and other fields.
Related models and alternative references
TPS5430DDAR belongs to the TI SWIFT™ series, which provides a wide range of temperature grades and packaging branches for project selection.
Same series, same function, different suffix selection：TPS5430DDAFor tube packaging version,TPS5430DDAG4It is a NiPdAu lead-coated version with exactly the same package parameters and can be directly replaced pin-to-pin.Optional if automotive grade AEC-Q100 certification is requiredTPS5430QDDARQ1(automotive grade), operating temperature consistent with electrical specifications, but more expensive.TPS5431DDARIt also supports 3A output, but the input voltage upper limit is reduced to 23V, which is suitable for cost-sensitive scenarios with low input bus margin requirements.
Cross-brand compatible alternative reference: If the project requires lower standby power consumption and higher transient response, please refer to TI's official alternative modelLMR51430(Synchronous rectification, lower static power consumption), the development tool chain and reference circuit of the same brand can be directly and quickly verified.Teams pursuing the stability of domestic supply chains can refer to: Xinzhou TechnologySCT2433It supports 3.8V to 40V input, integrates a synchronous rectification architecture, has a static power consumption of only 25μA, and is basically pin-compatible with the TPS5430. When replacing, the feedback resistor value needs to be adjusted simultaneously.SenleyvilleSL1585BIt is packaged in ESOP8 and supports 4.5V to 36V input and 3A continuous current. The pin definitions are basically the same and can be directly replaced.These models differ from the original models in terms of package size and protection mechanism. When replacing them, you need to carefully check the ambient temperature level and input and output timing, and complete sufficient electrical verification.
write at the end
Texas Instruments TPS5430DDAR, with its 36V wide-voltage input, 3A output, 95% peak efficiency and SO PowerPAD™ compact package, provides a reliable and efficient step-down solution for medium-power power supply designs in industrial control, communication equipment and automotive electronics.This classic chip, which has been in the power supply field for many years, is still the benchmark that engineers repeatedly refer to in standard power conversion scenarios such as 24V to 5V and 12V to 3.3V.
As a chip agent distributor that has been deeply involved in the electronic components industry since 2011, Shenzhen Hongmai Electronics Co., Ltd. has long-term TIAll models of TPS5430DDAR and SWIFT™ series DC-DC power chips are original and available in stock. Different branch versions such as TPS5430QDDARQ1 (automotive grade) and TPS5431DDAR (23V input version) are also supplied, as well as compatible domestic alternatives such as SCT2433 and SL1585B and various peripheral components such as inductors and capacitors. We support factory batch direct shipment, small batch samples and technical selection assistance.If you need inquiry or need to know the selection suggestions of different packages and input voltage ranges of the same series, please feel free to contact us (tel: 0755-23815611, QQ 2355878270).Shenzhen Hongmai Electronics Co., Ltd.
