TPS71433DCKT

Current - Output:	80mA
Base Part Number:	TPS71433
Supplier Device Package:	SC-70-5
Package / Case:	5-TSSOP, SC-70-5, SOT-353
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current
Control Features:	Current Limit
PSRR:	59dB ~ 54dB (120Hz)
Current - Supply (Max):	7.4µA
Current - Quiescent (Iq):	4.2µA
Series:	--
Voltage Dropout (Max):	0.4V @ 500mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	10V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS71433DCKT Application Field and Working Principle

Introduction:

The Texas Instruments TPS71433DCKT is an ultra-low quiescent current, Step-Down, high voltage regulator. It features an integrated power FET and control logic to provide an efficient and low-cost solution with fewer external components. The device is capable of providing up to 150 mA of output current, output voltage range from 2.6V to 16V, quiescent current of 35μA, and is stable with a minimum unregulated 1.24V input voltage (load dump protection to 40V).

Application Field:

The TPS71433DCKT is designed for applications such as battery-powered portable electronic devices, handheld electronic systems and other low-power applications. It is ideal for applications where long time operation on battery is desired.

Working Principle:

The TPS71433DCKT is a voltage regulator that operates by controlling an N-channel power switch which is connected between the input voltage and the output. When the switch is on, the output voltage is defined by the feedback network and is stored in an internal capacitor. When the switch is off, the output voltage is maintained by the internal N-channel MOSFET, which acts as a diode and allows current to flow from the input to the output.The TPS71433DCKT can operate in Pulse-Width Modulation (PWM), Pulse Frequency Modulation (PFM), or linear mode. In PWM mode, the duty cycle of the pulse is adjusted according to the output voltage, while in PFM mode, the pulse frequency is adjusted. In linear mode, the N-channel power switch is closed during normal operation and an internal linear regulator is used to maintain the output voltage.

Conclusion:

The TPS71433DCKT is an ultra-low quiescent current, Step-Down, high voltage regulator, ideal for applications where long time operation on battery is desired. The device is capable of providing up to 150 mA of output current, output voltage range from 2.6V to 16V, quiescent current of 35μA, and is stable with a minimum unregulated 1.24V input voltage (load dump protection to 40V). It operates by controlling an N-channel power switch which is connected between the input voltage and the output and can work in PWM, PFM, or linear mode.

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