AP65400SP-13

Voltage - Output (Min/Fixed):	0.8V
Base Part Number:	AP65400
Supplier Device Package:	8-SO-EP
Package / Case:	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	340kHz
Current - Output:	4A
Voltage - Output (Max):	16V
Series:	--
Voltage - Input (Max):	18V
Voltage - Input (Min):	4.75V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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PMIC – Voltage Regulators – DC DC Switching RegulatorsAn Application Field and Working Principle of the AP65400SP-13The AP65400SP-13 is a member of the AP654xx family of DC-DC switching regulators. This family of switching regulators features a highly robust, low noise and small form-factor package. AP65400SP-13 is no exception to this, featuring a simple current-mode PWM system for input power upto 3A. DC-DC switching voltage regulators, such as the AP65400SP-13 are part of a larger group of switch-mode power supplies that use functional blocks including rectifiers, transformers, AC-DC converters, and DC-DC converters. These functional blocks are connected in series and in parallel, to provide an assortment of voltage regulation and other power services. The main application field for the AP65400SP-13 is providing the supply voltage to low power applications that require a regulated output with high accuracy and low noise, such as many of the newer mobile device designs. Having a compact design with several features like onboard ESD protection and overvoltage protection makes it an ideal solution to support portable and fixed bridge voltage regulator designs. In order to understand the working principle of the AP65400SP-13, it is important to understand the two types of switching regulators, the non-isolated type and the isolated type: The non-isolated type is the most common type of switching regulator and is ideal for cost-sensitive applications. It is composed of one or more switch stages, a control IC, and several supplemental components. It works by transferring energy from the input voltage to the output voltage via switch stages, which are controlled by the control IC. The isolated type of switching regulator is a more complex type that consists of two or more switch stages, a control IC, and several other components. It works by transferring power between the input and output sides through the use of isolated transformers, which are controlled by the control IC. In contrast to the other switching regulators, the AP65400SP-13 is a non-isolated type, with a fractional frequency switching technique. This technique allows it to maintain an efficient and low-noise operation without the need for any additional components. The AP65400SP-13 features a wide input voltage range and supports step-up, step-down and buck-boost converters. It also has a wide temperature range, a high switching frequency and a wide protection range. Its limited current limit protection and auto restart features make it suitable for a variety of applications. In addition, the AP65400SP-13 also features a Powergood signal output, ideal for monitoring the voltage output of the regulator. This signal is active high, and signals a valid output voltage when it is running at the designated output levels. It also has an adjustable soft start feature to prevent output inrush current. Overall, the AP65400SP-13 is an ideal solution for supply voltage needs of low-power applications that require a regulated output with high accuracy and low noise. With its fractional frequency switching technique, wide input voltage range, wide temperature range, high switching frequency, wide protection range and additional features like the Powergood signal output, adjustable soft start and current limit protection, it is an ideal DC-DC switching regulator for providing low power output.

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