TPS70458PWPRG4

Current - Output:	1A, 2A
Base Part Number:	TPS70458
Supplier Device Package:	24-HTSSOP
Package / Case:	24-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
Control Features:	Enable, Power Good, Reset, Sequencing
PSRR:	65dB (1kHz), 60dB (1kHz)
Current - Quiescent (Iq):	250µA
Series:	--
Voltage Dropout (Max):	0.25V @ 1A, -
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V, 2.5V
Voltage - Input (Max):	6V
Number of Regulators:	2
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS70458PWPRG4 Application Field and Working Principle

Introduction

Texas Instruments’ TPS70458PWPRG4 is a three-pin Positive Voltage Regulator (PMIC) which features a 500 mA output current and adjustable output voltage range covering from 1.220 V to 24 V. The device is typically utilized in low voltage or microprocessor powered systems. The chip integrates a True Output Disconnect feature, allowing the system to remain in a low current standby state and allowing the device to be disabled by simply pulling the EN pin low. The device includes internal Over-Voltage Protection (OVP) and reverse current protection, in order to protect the system from any overload applications. Additionally, the device is specified for operating temperature over a wide range from -40°C to 85°C.

Application Field

The TPS70458PWPRG4 is designed for powering microcontrollers, DSPs, ASICs, FPGAs and other low voltage components. It is often used in automotive and industrial applications, since it can deliver clean power to the system and reliably protect it from any overload. It is an ideal choice for any system that operates in environments with high levels of EMI noise, as it is equipped with low-dropout voltage, low thermal resistance and high PSRR.

Features

• Low-Dropout Voltage (< 0.2V)
• Input Voltage Range: 2.3V to 30V
• Output Voltage Range: 1.22V to 24V
• True Output Disconnect
• Overvoltage Protection (OVP)
• Reverse Current Protection
• Operating Temperature: -40°C to 85°C

Working Principle

The TPS70458PWPRG4 employs a linear regulator architecture. It works by using a voltage divider network of resistors to adjust the device\'s output voltage. During operation, the input voltage is compared with the desired output voltage by a differential amplifier. If the output voltage falls below the required level, then the amplifier increases the voltage across the divider to bring the output voltage to the desired level. This is how the linear regulator works to maintain the desired output voltage despite changes in input voltage.The device\'s output is also connected to an offset voltage source, which is adjustable via an external resistor. This allows the user to set the output voltage of the device at any level within the specified voltage range. In addition, the TPS70458PWPRG4 has a true output disconnect feature, which will disconnect the output from the input when the EN pin is pulled low. This prevents any reverse current flow through the device when the system is in a low current standby state.

Conclusion

The TPS70458PWPRG4 from Texas Instruments is an excellent choice for a linear voltage regulator for system designs demanding stable and reliable power. Its wide input voltage range, adjustable output voltage and true output disconnect enable it to be used in a variety of applications, from automotive and industrial systems to microcontrollers and FPGAs.

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