BD3533EKN-E2

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The BD3533EKN-E2 is a special purpose voltage regulator that is commonly used for voltage control purpose in charging, powering, and other portable devices. It is an efficient, low power solution for regulating output voltages ranging from 0.5 V to 9.0 V. This device integrates a number of features, making it an attractive choice for portable applications.

Features

• High Efficiency: BD3533EKN-E2 offers up to 96% efficiency at 1.5V output and 93% efficiency at 5V output, reducing power loss and increasing power output
• Wide Operating Range: It is capable of delivering output between 0.5V and 9V while operating at an input range of 2.7V to 16V.
• Multi-Mode Operation: It supports both step-down/buck as well as step-up/boost mode operation which can be controlled through an external enable pin.
• Flexible Programmability: It allows for precise output voltage adjustment with a 0.1V step resolution.
• Integrated Output Discharge: It features integrated output discharge circuit which discharges the output voltage to ground, reducing the amount of current leakage.
• Current Limit Protection: It has integrated current limit protection circuitry which prevents outputs from exceeding their maximum current ratings
• Input Undervoltage Protection: It offers protection from input undervoltage condition which could damage the connected devices.
• Thermal Shutdown Protection: BD3533EKN-E2 provides thermal shutdown protection which switches off the device if the junction temperature exceeds 150°C.
• Low Quiescent Current: BD3533EKN-E2 has a low quiescent current of 27 μA in buck mode and 60 μA in boost mode.

Applications

• Mobile phones
• Tablet PCs
• Notebook PCs
• Game consoles
• Battery-Powered Devices
• Charging Applications
• Power Supply Applications

Working Principle

BD3533EKN-E2 device is designed to convert input voltage within the operating range to a stabilized output voltage as specified. This voltage conversion is done using a Buck-Boost operation which could be switched between Buck and Boost (step-up/step-down) mode using an external signal. The device uses a voltage loop feedback network to constantly monitor the output voltage against the reference voltage. If the output voltage deviates from its set level, the feedback signal triggers appropriate action from the control circuitry within the device. This in turn adjusts the duty cycle of the control switch to maintain the desired output voltage.

The device also features an internal circuit to reduce the power losses caused by output voltage discharge due to output capacitance. It also has an input undervoltage protection circuit which prevents the input voltage from dropping below the specified lower limit.

BD3533EKN-E2 also features an internal current limit protection circuit which prevents the output voltage from exceeding its maximum load current rating. It also includes a thermal shutdown protection circuit which switches off the device if its internal temperature exceeds a certain threshold.

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