MAX851ISA+

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The MAX851ISA+ is a DC-DC switching regulator designed by Maxim Integrated Products Inc. It is a highly versatile, externally compensated, adjustable frequency PWM switching regulator, featuring a wide input voltage range, integrated frequency compensation, high switching frequency of up to 500 kHz, and low on-resistance MOSFET switch architecture. With its wide range of features, the MAX851ISA+ is ideal for a variety of applications, including telecom, industrial, computer/peripheral, automotive, and consumer systems.

The core of the MAX851ISA+ DC-DC switching regulator is an open-loop control architecture. This architecture uses pulse-width modulation and a feedback loop to regulate an output voltage. As the output voltage deviates from the set point due to load changes, the regulator’s control loop adjusts the width of the pulses to maintain the desired output voltage. Input voltage ripple and transient responses are improved due to the MOSFET switch’s fast turn-on and turn-off time.

As well as limiting the output voltage at its external VCC input, the MAX851ISA+ also provides two internal current limit thresholds. The MAX851ISA+’s current limit thresholds protect the device and system components from over current and short circuit situations, and also operate as a fault detection system, allowing an external device to sense a fault signal when either current threshold is exceeded. The MAX851ISA+ also provides an adjustable Under-Voltage Lockout (UVLO) feature to protect the device from low voltage operation, which allows the device to be powered-up or powered-down without any glitches or jumps in the output.

The operating temperature range for the MAX851ISA+ is -40°C to 85°C. Its wide input voltage range is between 4.5V and 36V, and its output voltage range can be from 0.5V to 16V. It has an adjustable switching frequency of 250 kHz to 500 kHz, and its peak current limit threshold is 500 mA. The device is also capable of providing up to 500 mA of output current.

The MAX851ISA+ is a highly efficient DC-DC switching regulator, powered by an adjustable frequency pulse width modulation scheme with current limit feature, enabling the device to operate across a wide input voltage range without sacrificing performance or size. It is designed to be used in a variety of applications, including telecom, industrial, computer/peripheral, automotive, and consumer systems. The MAX851ISA+ is an ideal choice for designers looking to build reliable, efficient, and cost effective DC-DC switching regulator solutions.

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