ADP2503ACPZ-4.2-R7

Voltage - Output (Min/Fixed):	4.2V
Base Part Number:	ADP2503
Supplier Device Package:	10-LFCSP-WD (3x3)
Package / Case:	10-WFDFN Exposed Pad, CSP
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	2.5MHz
Current - Output:	600mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.3V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck-Boost
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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The ADP2503ACPZ-4.2-R7 is a high performance, low power DC-DC switching regulator specifically designed for portable, cable and remote system applications. The ADP2503ACPZ-4.2-R7 is ideally suited for applications requiring low noise and fast transient response, and it supports load currents from 2.5A up to 8A depending upon voltage selection. The ADP2503ACPZ-4.2-R7 is manufactured in an advanced, low-noise process, and it is available in a 5-Lead TSOP package.The ADP2503ACPZ-4.2-R7 offers a versatile, optimized combination of features and performance that makes it adaptable to a wide range of applications. The ADP2503ACPZ-4.2-R7 incorporates a current mode topology to provide excellent line and load regulation as well as fast transient response. An adjustable current limit circuitry and a thermal shutdown circuit protect the device against overload and excessive junction temperature.The ADP2503ACPZ-4.2-R7 has a fixed-frequency, and it is designed to eliminate several external components by integrating functions such as the soft-start, cycle-by-cycle current limiting, ground sense and output voltage feedback. The ADP2503ACPZ-4.2-R7 also provides a negative output and enable function that can be used to further reduce the number of external components required.The ADP2503ACPZ-4.2-R7 application field and working principle can be broken down into the following categories: * Input Power Source: The ADP2503ACPZ-4.2-R7 accepts an input voltage range from 4 to 14V.* Output Voltage and Current Limiting: The ADP2503ACPZ-4.2-R7 features adjustable output voltage between 0.7V and 4.5V and adjustable output current limiting up to 8A.* DC-DC Switching Regulator: The ADP2503ACPZ-4.2-R7 utilizes a fixed-frequency, current mode topology to provide excellent line and load regulation as well as fast transient response.* Thermal Protection and Soft-Start Function: The ADP2503ACPZ-4.2-R7 has an integrated thermal protection circuit and soft start function, eliminating the need for external components.* Enable Function: The ADP2503ACPZ-4.2-R7 also provides an enable feature that can be used to turn the output voltage on or off.The ADP2503ACPZ-4.2-R7 is an ideal device for applications requiring low-noise and fast transient response for low output current applications such as cable and remote systems, computers, personal digital assistants and cell phones.The working principle of the ADP2503ACPZ-4.2-R7 is based on a fixed-frequency, current-mode topology. The ADP2503ACPZ-4.2-R7 utilizes a voltage-mode control loop to regulate the output voltage. The voltage-mode control loop is composed of an error amplifier, a reference voltage, a reference divider and a current sense amplifier. The output of the error amplifier is fed back to the reference divider, allowing the system to regulate the output voltage.Simultaneously, the device’s current-mode control loop operates on the input side of the power supply system. The current-mode control loop consists of two current-sensing elements; one is an inductor current sense and the other is a load current sense. The current-mode control loop reshapes the input current waveform. The reshaping of the input current waveform is designed to minimize switching losses and reduce ripple noise.The ADP2503ACPZ-4.2-R7 also features a proprietary power-saving mode that helps reduce system power consumption by varying the output voltage, as well as a programmable soft-start circuit to reduce inrush current and avoid output voltage overshoot during start-up.The ADP2503ACPZ-4.2-R7 is a versatile device with an optimized combination of features and performance that make it ideal for cost-effective DC-DC switching regulator applications. Its wide input voltage range and fast transient response time make it an excellent choice for many different system solutions, such as cable and remote systems, computers, personal digital assistants, and cell phones.

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