BD9327EFJ-LBE2

PMIC - Voltage Regulators - DC DC Switching Regulators

BD9327EFJ-LBE2 is a PMIC (Power Management IC) which belongs to the voltage regulators category, specifically DC DC switching regulators. It is a chip which integrates many functionalities. It is mainly used to provide power to system, peripherals and application processor inside electronic devices with wide range of voltages, electronic currents and thermal powers.

Features

• Wide input voltage range: 3V to 18VDC
• Over-current protection
• Over-temperature protection
• Under voltage lockout
• Short-circuit protection
• Low ripple noise and low power consumption
• High accuracy and low dropout voltage

Applications

BD9327EFJ-LBE2 is typically used for application, system and peripheral power supply in digital cameras, camcorders, voice recorders, portable DVD players and other portable devices requiring a wide range of voltages and currents. It is also suitable for power supply design of battery-powered equipment, such as smart phones, portable media players and gaming devices.

Working Principle

BD9327EFJ-LBE2 is a current mode DC-DC switching regulator which is based on buck converter topology. It converts a higher input voltage to a lower output voltage with efficiency which is similar to a buck converter. The switching regulator consists of an internal power switch and an error amplifier as well as an external Schottky diode. The internal error amplifier senses and amplifies the output voltage and compares it with the reference voltage. When current is flowing from the pulse width modulation (PWM) comparator, an N-MOSFET is switched ON and current is supplied to the load. When the switch is switched OFF, current will be transferred to the output capacitor via the external Schottky diode.

The BD9327EFJ-LBE2 includes over-current protection, over-temperature protection, under voltage lockout, and short-circuit protection. The internal error amplifier also provides a high accuracy and low dropout voltage. This chip produces a low ripple noise and consumes a low power. Therefore, it is an ideal chip for wide range of voltage and current levels with high efficiency.