ADP2138ACBZ-3.0-R7

Voltage - Output (Min/Fixed):	3V
Base Part Number:	ADP2138
Supplier Device Package:	6-WLCSP (1.03x1.50)
Package / Case:	6-UFBGA, WLCSP
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	3MHz
Current - Output:	800mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.3V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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DC DC Switching Regulators

Switching voltage regulators, also known as DC-DC converters, are electronic equipment used to regulate and convert electrical power. They are most commonly used to step up or step down the output voltage to the desired level in order to meet the requirements of the specific application. The ADP2138ACBZ-3.0-R7 (ADP2138) is a high-efficiency, dual-channel, integrated DC-DC switching regulator, widely used in field applications due to its low power dissipation, high efficiency and fast response characteristics.

The ADP2138 Application Field

The ADP2138 provides and efficient, low-cost power solution for a wide range of applications, including computers and notebooks, communications, automotive systems, power management, smartboard and displays, and set-top box and media player systems. It is also used for distributed power systems and industrial control systems. Its unique design is perfect for powering AC/DC adapters, DC/DC converters, or any other circuit or system requiring a regulated output voltage.

Working Principle of ADP2138

The ADP2138, like other DC-DC converters, helps regulate the power output of a power source, such as a battery, by converting the voltage from the source to the required voltage of the system, with a very high efficiency. The voltage regulator has two controlled power channels that can provide a regulated output voltage across a wide input voltage range (1.8V to 5.5V).The regulator’s integrated control and external compensation circuit makes it ideal for use in different system designs. The ADP2138 operates in three different power modes - pulse width modulation (PWM) mode, pulse frequency modulation (PFM) mode and forced PWM mode.In PWM mode, the internal power switch modulates the output voltage by switching at a frequency determined by an external resistor. During each cycle, the output voltage is updated based on the feedback voltage and the calculated duty cycle, which is controlled by an integrated high-performance buck converter.In PFM mode, the integrated controller acts as an active regulator with the duty cycle controlled by an external circuit. The duty cycle is generated through a comparison between the output voltage and a reference voltage.In forced PWM mode, the control signal is generated by the on-chip error amplifier. The mode is typically used in DC/DC converters due to its superior regulation characteristics.

Conclusion

The ADP2138 is a versatile DC-DC switching regulator that is suitable for a wide range of applications. As a low-cost, high-efficiency power solution, it provides unparalleled performance and stability. With a wide input voltage range and fast response time, the ADP2138 is an ideal choice for many DC/DC applications.

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