AP3211KTR-G1

Voltage - Input (Max):	18V
Supplier Device Package:	SOT-23-6
Package / Case:	SOT-23-6
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	1.4MHz
Current - Output:	1.5A
Voltage - Output (Max):	15V
Voltage - Output (Min/Fixed):	0.81V
Series:	--
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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AP3211KTR-G1: DC DC Switching Regulators

The AP3211KTR-G1 is a voltage regulator used in DC-DC switching applications. It is a highly featured, single-channel, synchronous step-down regulator, designed to meet the requirements of both high-end smartphones and personal digital assistants (PDAs). Its output voltage can be adjusted from 0.8 to 4.2V and it provides an efficient output current of up to 3A. With an efficiency of up to 95%, the AP3211KTR-G1 is well suited for applications with limited space and high power requirements.

Application Field:

The AP3211KTR-G1 is designed to be used in a variety of applications such as mobile phones, PDAs, personal media players, handheld computers, and industrial equipment. It is well suited for use in notebooks, network routers, set-top boxes, and other devices that require a highly efficient DC-DC switching regulator.

Detailed Description:

The AP3211KTR-G1 is a high-efficiency, single-channel synchronous step-down voltage regulator. It consumes very low quiescent current (IQ), and its internal MOSFETs provide an output current of up to 3A. It uses a fixed switching frequency of 500 kHz, which can be adjusted by external resistors for better EMI performance. Its operating temperature range is -40 to +85°C, making it suitable for use in wide temperature ranges.The on-chip feedback circuit enables the AP3211KTR-G1 to regulate its output voltage accurately. It also has over-current protection, under-voltage protection, and thermal shutdown. The device is packaged in a HTSSOP (hot-melt transfer substrate) package that has high thermal dissipation and low-profile mounting.

Working Principle:

The AP3211KTR-G1 uses a synchronous step-down conversion topology. This technique reduces power loss and decreases the switching noise. The internal MOSFETs are driven and controlled by a PWM circuit. The PWM circuit communicates with the on-chip feedback circuit to accurately maintain the output voltage and current.When the voltage on the output increases, the PWM circuit reduces the on-time of the MOSFETs, which limits the current flowing through them. Similarly, when the voltage on the output decreases, the PWM circuit increases the on-time of the MOSFETs to increase the current flowing through them.The AP3211KTR-G1 also uses a fixed frequency of 500 kHz to provide stable operation. This frequency can be adjusted externally, which reduces potential interference with nearby electronics and improves operational efficiency.

Summary:

The AP3211KTR-G1 is a high-efficiency, single-channel, synchronous step-down voltage regulator. It is designed for use in DC-DC switching applications such as mobile phones, PDAs, personal media players, handheld computers, and industrial equipment. It provides an output current of up to 3A and has an adjustable output voltage range from 0.8 to 4.2V. It uses a 500 kHz fixed-frequency and can be externally adjusted for better EMI performance. The AP3211KTR-G1 has an operating temperature range of -40 to +85°C and is packaged in a HTSSOP package that has high thermal dissipation and low-profile mounting.

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