MAX8952BEWE+T

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MAX8952BEWE+T Application Field and Working Principle

The MAX8952BEWE+T is a low-noise buck regulator optimized for powering RF transceiver and VCO loads. Its low output noise and power-efficient architecture make it ideal for use in a wide variety of devices, including RF front-end modules and mobile phones. This highly integrated DC-DC converter contains the main switch, bootstrap circuit, and bias control circuitry, allowing a single-inductor solution to provide fixed-frequency, pulse-width modulated (PWM) operation over a wide range of input and output voltages. As a member of the MAX8952 family of DC-DC converters, it can also be used to support both 3.3 and 5V applications.

Features

• Output voltages from 0.70V and 4.5V
• High-accuracy voltage regulation
• Wide-range pulse-width modulation (PWM) for efficiency optimization
• Fixed-frequency operation up to 2.0MHz
• High-frequency VCO input up to 2.8GHz
• Low RDS(ON) dual P-channel switches
• Low-noise performance and power-efficient architecture
• High-accuracy linear regulator loop control
• High power-supply ripple rejection (PSRR)
• Integrated bootstrap circuit

Application Fields

• RF front-end modules
• Cellular base stations
• Low-noise DC-DC converters
• MOEMS transceiver applications
• GPS receivers
• 4G/5G applications
• Wireless LAN cards
• Bluetooth modules
• Wireless audio/video applications
• Mobile handsets
• Tablets
• Portable medical devices

Working Principle

The MAX8952BEWE+T is a low-noise buck switching regulator with an integrated P-channel MOSFET and complementary N-channel MOSFET switch. It can provide a wide range of output voltages from 0.7V to 4.5V with a maximum output current of 500mA. It has a high-accuracy voltage regulation loop with a maximum 0.5% system error over-temperature and line variations. The wide range of pulse-width modulation (PWM) allows the converter to be optimized for efficiency while maintaining high-accuracy regulation. The wide operating frequency range of the PWM control circuit is up to 2MHz, allowing fast transient response to load changes. An integrated shutdown control circuit monitors the voltage of the output capacitor and turns off the device when the voltage falls below a predetermined lower limit. In addition, the MAX8952BEWE+T features a low-profile 8-lead, 5mm x 5mm TQFN package with a low-profile 0.53mm body.

The MAX8952BEWE+T is ideal for powering high-accuracy, low-noise applications, such as RF modules and VCOs. Its low output noise, wide range of input and output voltages, and power-efficient architecture make it well-suited for mobile applications. It is also a great solution for powering high-accuracy linear regulators. The device\'s integrated bootstrap circuit and bias control circuitry combine to simplify the design process, allowing for single-inductor solutions. Additionally, the device can support both 3.3V and 5V applications.

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