ZL2008ALBFT

Frequency - Switching:	200kHz ~ 1.4MHz
Base Part Number:	ZL2008
Supplier Device Package:	36-QFN (6x6)
Package / Case:	36-VFQFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Current Limit, Enable, Power Good, Soft Start
Serial Interfaces:	I²C, PMBus, SMBus
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	95%
Series:	--
Voltage - Supply (Vcc/Vdd):	3 V ~ 5.5 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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PMIC - Voltage Regulators - DC DC Switching Controllers: ZL2008ALBFT Application Field and Working PrincipleOverview of ZL2008ALBFTThe ZL2008ALBFT voltage regulator is a closed loop switching type voltage regulator with a power supply voltage range of 4.5V to 16V. This integrated solution can support up to 8A input current and a continuous output current of up to 5.5A. It combines the advantages of the linear and switching voltage regulators by providing a highly efficient, low noise, and low output ripple voltage regulator.The ZL2008ALBFT is a monolithic integrated circuit integrated into a standard 8-lead SOIC package. It uses synchronous rectification technology resulting in less power consumption, better efficiency and stability, and less thermal dissipation. This integrated circuit has an internal under-temperature protection, anti-over-current protection, as well as soft-start protection which helps to ensure the safety of the circuit and its components.Application FieldThe ZL2008ALBFT voltage regulator is particularly suitable for use in applications such as portable and handheld electronic devices, telecommunications equipment, notebooks, laptop computers, DC motors, medical equipment, and automotive applications.The power supply voltage range of the ZL2008ALBFT makes it an ideal choice for applications where fixed output voltages are required, such as CPUs, Discrete integrated circuits, and input or output voltage conversion for video devices. It is also suitable for applications where varying output voltage is required, such as LED lights, LED displays, LCD displays, MP3 Players, and other low power devices.Working PrincipleThe ZL2008ALBFT voltage regulator employs a double-loop voltage feedback control architecture. In this type of architecture, the voltage appearing at the output of the regulator is compared to the reference voltage set by the external resistor divider. This feedback is used to accurately maintain the output voltage. The first loop of the double-loop Architecture is used to adjust the duty cycle of the internal high-side MOSFET and low-side MOSFET in order to maintain the output voltage within the given range. The second loop is used to maintain the internal compensation capacitor C COMP at the right level, in order to prevent instability issues. The voltage regulator has an adjustable maximum duty cycle limit circuit which helps to implement the current limit and over-temperature protection. The ZL2008ALBFT also offers an input voltage range detector circuit which helps to make sure that the regulator will not turn on at an input voltage less than the lower limit of its input voltage range, as well as help to reduce noise on the input.In order to achieve a fast transient response and reduce the power consumption, the ZL2008ALBFT implements a blanking circuit. This blanking circuit is used to turn off the output of the regulator with a specific delay, in order to properly reset the internal compensation components and further reduce noise and power consumption.Overall, the ZL2008ALBFT offers a high efficiency voltage regulator with a stable, accurate, and fast transient response, at a reasonable price. It is also offers a wide range of protection features to protect against input voltage variations, current fluctuations, and over-temperature conditions. Therefore, it is well suited for use in a variety of applications, from LED lighting and MP3 players to automotive electronics and medical equipment.

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