CS5205A-1GDPR3

Current - Output:	5A
Base Part Number:	CS5205A
Supplier Device Package:	D2PAK-3
Package / Case:	TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	82dB (120Hz)
Current - Quiescent (Iq):	6mA
Series:	--
Voltage Dropout (Max):	1.25V @ 5A
Voltage - Output (Max):	13V
Voltage - Output (Min/Fixed):	1.25V
Voltage - Input (Max):	17V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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CS5205A-1GDPR3

Introduction

CS5205A-1GDPR3 is a linear voltage regulator IC produced by Texas Instruments. It is a highly integrated, low-voltage, low-power regulator that provides active current limit and short-circuit protection. It incorporates an on/off control pin and is suitable for battery operated systems as well as automotive and industrial applications.

Uses and Applications

The CS5205A-1GDPR3 can be used in a wide variety of applications such as powering high-power RF/analog circuitry in cell phones, powering microprocessors in mobile platforms, and providing a low cost, low power solution to systems where the typical input supply voltages range from 1.8V to 5.5V. It can also be used for stand-by and sleep mode applications in PCs, digital still cameras and other battery powered devices.

Features and Benefits

The CS5205A-1GDPR3 offers several features and benefits. It provides up to a 2-amp (2A) output current and an adjustable output voltage from 0.5V to 3.6V with an accuracy of ±1.5%; an external resistor controls the output voltage. It has a low quiescent current of 31µA. The device is designed to meet strict load and line regulations, such as pulling load or line transient requirement. The internal soft start circuit helps reduce the inrush current during start-up and system reboots. The chip has thermal shutdown protection and under voltage lockout (UVLO) to keep the output voltage in check and avoid damage to the system due to excessive current draw. The input voltage range of 1.8V to 5.5V and the low noise level of 50µV RMS make this device an ideal choice for low-power, low-voltage applications.

Working Principle

At its core, the CS5205A-1GDPR3 is a linear regulator. It operates by passing current through one transistor to the other, and thus limits the output voltage to a predetermined level. The preset voltage is determined by the external resistor network connected to the output terminal.The device has an internal power-on reset (POR) circuit which ensures that the output voltage is held at the preset value until the input voltage is high enough. The device also has an adjustable, over-temperature, and over-current protection circuit, which disconnects the output if the internal temperature gets too high or if the current draw is greater than the specified limit. This internal current limit, along with an external sense resistor, allows the user to monitor the output current and adjust it as needed.

Conclusion

The CS5205A-1GDPR3 is an easy-to-use, efficient, and low-cost linear voltage regulator IC, suitable for a variety of battery operated systems, automotive and industrial applications. Its main features and benefits include an adjustable output voltage from 0.5V to 3.6V with an accuracy of ±1.5%, 2A output current, low quiescent current of 31µA, pull-load and line transient requirement compliant, and undervoltage and over-current protection. It is a great choice for low-power, low-voltage applications.

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