MAX653CSA+T

Voltage - Output (Min/Fixed):	1.3V (3V)
Base Part Number:	MAX653
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	--
Current - Output:	225mA
Voltage - Output (Max):	11.5V
Series:	--
Voltage - Input (Max):	11.5V
Voltage - Input (Min):	4V
Number of Outputs:	1
Output Type:	Adjustable (Fixed)
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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The MAX653CSA+T Application field and working principle are related to the PMIC - Voltage Regulators - DC DC Switching Regulators category. The MAX653 CSA+T is a low-cost synchronous Step-Down regulator solution. The MAX653 CSA+T is a 3A rated, high-efficiency, integrated voltage regulator with an adjustable output voltage from 0.6V to 5V. This device incorporates a high-efficiency, low RDS(ON) synchronous buck switching regulator and a linear regulator to achieve a low component count and a minimalist solution for your power-supply needs. The MAX6593CSA+T offers multiple features and benefits. The device is offered in an industry-standard TSOT-23 package which makes it suitable for use in a variety of applications. The core switching regulator features an adjustable output voltage range from 0.6V to 5V, output current up to 3A and high efficiency up to 95%.The MAX653 CSA+T has a wide input operating voltage range of 2.7V to 6V, and provides a master enable control as well as a shutdown/skip signal to reduce the output current to zero. It also features internal soft-start, power-good signal output, current limit, self-protection, and over-temperature protection. The device also features programmable switching frequency from 200kHz to 2MHz, allowing you to minimize EMI and optimize component size and cost.The device also includes a linear regulator, which offers a fixed output voltage of 0.6V for post-regulating the output of the MAX6593CSA+T. The linear regulator is enabled by the enable signal and provides stable output voltage despite input voltage and output loading fluctuations. The linear regulator also utilizes low dropout voltage resulting in low quiescent current, making it suitable for battery applicationsIn its simplest form, the MAX653 CSA+T converts an incoming direct current (DC) supply voltage to a regulated DC output voltage. A buck (step-down) regulator IC is used to reduce the output voltage from the input voltage while a linear regulator IC is used to provide a stable, low voltage output. A block diagram of a simple MAX6593CSA+T circuit is shown in Figure 1.

The incoming DC voltage is applied to the input pin and then to the switching regulator IC. The regulator IC features an adjustable output voltage, current limit and frequency control. Once the voltage is regulated and the current limit is set, the regulator IC provides regulated power to the output load.The linear regulator IC used in the MAX6593CSA+T provides the post-regulating of the output. This linear regulator IC has a fixed output voltage of 0.6V, and is enabled by the enable signal from the regulator IC. This linear regulator IC provides additional stability to the output voltage and provides a low output voltage dropout.The MAX653 CSA+T is suitable for various low power applications including portable devices, smartphones and tablets. The device is also suitable for powering FPGAs, processors and other digital circuits. In addition, this device is well suited for battery-powered applications due to its low quiescent current draw when enabled.In conclusion, the MAX653 CSA+T is a low-cost, integrated voltage regulator offering an adjustable output voltage from 0.6V to 5V, output current up to 3A, and high efficiency up to 95%. The device features a high-efficiency buck switching regulator, adjustable switching frequency, an enabled linear regulator, and provides multiple features such as soft-start, power-good signal, current limit, self-protection, and over-temperature protection. The MAX653 CSA+T is suitable for a variety of power-supply needs and is perfect for low-power applications including portable devices, smartphones and tablets, as well as high-performance FPGAs, processors and digital circuits.

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