TPS5430DDAR: Pinout, Failure Modes, and Proper Configuration

By Texas Instruments 490

TPS5430DDAR: Pinout, Failure Modes, and Proper Configuration

TPS5430DDAR is a DC-DC power management integrated circuit (IC). It is a high output current PWM converter integrating low resistance, high-end N-channel MOSFET to provide efficient power solutions for various application fields.

In addition to the listed features of the TPS5430DDAR, the base board also includes a high-performance voltage error amplifier that provides high voltage regulation accuracy under transient conditions, an undervoltage lockout circuit to prevent startup before the input voltage reaches 5.5V, and an internally set slow start. circuit to limit inrush current, and a voltage feedforward circuit to improve transient response.

The TPS5430DDAR is a power management integrated circuit (PMIC) used to convert input voltage to a lower output voltage and is suitable for power supply in various electronic devices.

Ⅰ.Specification parameters of TPS5430DDAR

•Number of channels:1
•Number of pins:8
•Over-temperature protection:Yes
•Output current:3 A
•Number of output interfaces:1
•Frequency:500 kHz
•Quiet current:18 uA
•Quiet current:3.00 mA
•Output voltage:Adjustable
•Product Category:Switching Regulator
•Number of output terminals:1 Output
•Switching frequency:500 kHz
•Installation style:SMD/SMT
•Minimum operating temperature:-40℃
•Maximum operating temperature:+125℃
•Operating power supply current:3 mA
•Input voltage:5.5 V to 36 V
•Product:Voltage Regulators
•Type:DC/DC Converter
•Input voltage (minimum):5.5 V
•Input voltage (maximum):36 V
•Product Type:Switching Voltage Regulators
•Subcategory:PMIC-Power Management ICs

Ⅱ.Features of TPS5430DDAR

1.High integration
Integrated low-resistance high-side N-channel MOSFET supports efficient power supply design, reduces the number of external components and reduces design complexity.

2.Powerful voltage regulation and current limiting
Features a high-performance voltage error amplifier to provide tight voltage regulation accuracy under transient conditions, and an overcurrent limiting function to protect the circuit from damage.

3.High precision
The output voltage accuracy can reach ±1%, and the load adjustment accuracy is ±0.5%, providing stable output voltage.

4.High efficiency
The TPS5430DDAR adopts Texas Instruments' D-CAP2 architecture, which features fast dynamic response and high-precision output voltage. Its efficiency is as high as 95%, enabling efficient and stable power conversion.

5.Fast dynamic response
TPS5430DDAR adopts advanced current mode control technology, which can achieve fast and stable output voltage and current, meeting the needs of modern electronic equipment for fast response to power supply.

6.Multiple protection functions
It has multiple protection functions such as overload protection, over-temperature protection, short-circuit protection and under-voltage protection to ensure safe and stable operation of the system.

7.Wide voltage range
Its input voltage range is 4.5V to 28V, and its output voltage range is 0.76V to 5.5V, adapting to a variety of application scenarios.

8.Wide operating temperature range
It can work in the temperature range of -40°C to +125°C and adapt to various environments.

9.High output current
The maximum output current can reach 3A, meeting the needs of high-power applications.

10.Compact package
It adopts 8-pin SON package and measures 3mm x 3mm, saving circuit board space.


Ⅲ.Pin layout of TPS5430DDAR

•Pin1(BOOT):Boost capacitor for the high-side FET gate driver. Connect 0.01 μF low ESR capacitor from BOOT pin to PH pin.
•Pin2,3(NC):Not connected internally.
•Pin4(VSENSE):Feedback voltage for the regulator.Connect to output voltage divider.
•Pin5(ENA):On and off control.Below 0.5 V,the device stops switching.Float the pin to enable.
•Pin6(GND):Ground Connect to DAP.
•Pin7(VIN):Input supply voltage.Bypass VIN pin to GND pin close to device package with a high quality, low ESR ceramic capacitor.
•Pin8(PH):Source of the high side power MOSFET.Connected to external inductor and diode.

Ⅳ.Absolute Maximum Ratings of TPS5430DDAR
Over operating junction temperature range (unless otherwise noted)


Ⅴ.Electrical Characteristics of TPS5430DDAR


Ⅵ.Application fields of TPS5430DDAR

1.Medical equipment: Medical equipment has very strict requirements on power supply because they involve the safety of patients’ lives. TPS5430DDAR can be used in medical equipment, such as medical imaging equipment, monitoring instruments, etc. TPS5430DDAR has fast dynamic response capability and can quickly respond to power changes in a short time to ensure the stability of medical equipment under transient conditions.

2.Communication equipment: Network equipment such as base stations, routers, switches, etc., require efficient and stable power management to ensure the stability and reliability of data transmission. TPS5430DDAR adopts advanced power management technology and has high-efficiency power conversion capabilities, which can reduce Energy loss and heat generation, reducing system power consumption. This helps communications equipment achieve longer uptime and lower operating costs.

3.Consumer electronics: such as tablets, smartphones, digital cameras, etc. TPS5430DDAR can be used as a power management chip in these devices to provide stable voltage output.

•Tablet PCs: In tablet PCs, the TPS5430DDAR efficiently manages battery power, ensuring that the processor, display, and other critical components receive the required stable voltage. This helps extend battery life while ensuring the performance of the tablet in a variety of application scenarios.

•Smartphones: Smartphones integrate a large number of precision electronic components, which require extremely high power supply stability. TPS5430DDAR can provide precise voltage regulation to ensure that mobile phones can maintain stable performance in various usage scenarios such as calls, Internet access, and games. In addition, the chip also has efficient energy-saving features, helping to reduce the power consumption and heat generation of mobile phones.

•Digital cameras: Digital cameras require fast and stable power supply to support their high-performance image processing functions. TPS5430DDAR can provide fast transient response and low noise output, ensuring that digital cameras can obtain clear pictures and videos in various shooting environments. At the same time, the chip also has a wide input voltage range and can adapt to the power supply standards of different countries and regions.

4.Industrial automation: In industrial automation systems, stable power supply is crucial to ensure the stability and reliability of equipment operation. The TPS5430DDAR can be used to control the power supply of motors, sensors and other industrial equipment. TPS5430DDAR adopts advanced current mode control technology to achieve fast and stable output voltage and current. This technology helps ensure that motors, sensors and other equipment in industrial automation systems receive a stable and reliable power supply under various working conditions.

5.Automotive electronics: There are many electronic systems inside the car that require stable power supply, such as infotainment systems, vehicle-mounted sensors, etc. The TPS5430DDAR can be used in these systems.


Ⅶ.Common failure modes of TPS5430DDAR

1.Short circuit: When the output terminal is short-circuited, TPS5430DDAR may suffer from short-circuit fault. This can cause chip damage or overheating.

2.Output voltage drift: The output voltage may drift due to load changes, temperature changes or other environmental factors. If the output voltage is outside the specified range, it may cause system instability or other problems.

3.Overload: If the load exceeds the rated output current of TPS5430DDAR, it will cause an overload fault. This may cause overheating or other damage to the chip.

4.Electromagnetic interference (EMI): When electromagnetic interference is present during high-frequency operation or near power lines, it will affect the performance of the TPS5430DDAR. This may cause unstable output waveforms or other problems.

5.Input overvoltage: If the input voltage exceeds the rated operating voltage range of the TPS5430DDAR, it will cause an input overvoltage fault. This may damage the chip or related circuitry.

6.Component aging: Long-term use or poor environmental conditions may cause capacitors, inductors and other components to age, thus affecting the performance and stability of the TPS5430DDAR.

7.Temperature is too high: If the ambient temperature is too high or the chip itself has poor heat dissipation, it will cause overtemperature failure. This can cause the chip to overheat and reduce performance or damage the chip.

Ⅷ.Correct configuration of TPS5430DDAR

1.Output capacitor (COUT): An output capacitor is connected in parallel at the output end to filter out transient fluctuations and noise of the output voltage and provide a stable output voltage. Output capacitor values ​​typically range from a few microfarads (μF) to tens of microfarads (μF), depending on load requirements and voltage regulation requirements. Likewise, you can choose low-ESR ceramic capacitors or aluminum electrolytic capacitors.

2.Input capacitor (CIN): Connect an appropriate capacitor in parallel with the input end to absorb transient fluctuations and noise of the input voltage. Normally, the capacitance of this capacitor should be between a few microfarads (μF) and tens of microfarads (μF). You can choose low ESR (equivalent series resistance) ceramic capacitors or aluminum electrolytic capacitors.

3.Output inductor (L): An output inductor is connected in series at the output end to stabilize the output current and reduce the ripple of the output voltage. The selection of the output inductor should consider factors such as load current, output ripple requirements, and operating frequency. The output inductor is usually chosen to be from tens of microhenries (μH) to hundreds of microhenries (μH).

4.Output diode (D1): If the load is an inductive load, a diode can be connected in parallel at the output end to protect the TPS5430DDAR chip from the reverse voltage generated by the load. This diode is often called a free wheel diode and appropriate parameters should be chosen to meet the load requirements.

5.Feeder resistor (RF): Connect a feeder resistor in parallel between the feedback pin (FB) and ground to set the output voltage. The choice of feeder resistors depends on the desired output voltage.


1.Ensure that the parameters of external components meet the specifications of TPS5430DDAR, such as operating voltage range, maximum current, maximum power consumption, etc.

2.When designing the circuit board layout, input and output filter capacitors, inductors and other components should be placed close to the TPS5430DDAR chip to reduce the feeder length and circuit loop area.

3.When arranging external components, the feeder length and loop area should be minimized to reduce electromagnetic interference and improve system stability.

Ⅸ.Alternate model of TPS5430DDAR



Frequently Asked Questions

1.What is the primary function of TPS5430DDAR?
The primary function of TPS5430DDAR is to convert a higher input voltage to a lower output voltage with high efficiency.

2.What are the common external components needed for configuring TPS5430DDAR?
Common external components needed for configuring TPS5430DDAR include input and output filter capacitors, output inductor, feedback resistors, and possibly a freewheeling diode depending on the application.

3.How does TPS5430DDAR achieve high efficiency?
TPS5430DDAR achieves high efficiency through synchronous rectification, which reduces power loss in the freewheeling diode, and through optimized control algorithms.