MAX1812EUB+T

PMIC - Power Management - Specialized

MAX1812EUB+T is a high-performance, 200kHz, microprocessor-controlled, pulse-width modulation (PWM) DC-DC converter for handheld and battery-powered applications. It combines a flexible feature set and low external component count into a 5 x 5 mm, 20-pin TQFN package. The MAX1812 has an output voltage that can be programmed from 0.8 V to 5.5 V in 0.1 V steps using an external resistor. The MAX1812 reduces external component count and cost, extends battery life, and maximizes system flexibility in handheld and battery-powered applications.

Application Field

The MAX1812EUB+T is designed to provide a power solution for handheld and battery operated systems. It is used to efficiently regulate the output voltage over a wide range of inputs while the load current is maintained at a desired level. It provides a configurable frequency and duty cycle optimized to reduce input and output ripple. It has several protection features including thermal shutdown, current limiting, input/output overvoltage protection, and cycle-by-cycle current limiting. This allows the system designer to configure the MAX1812 for operation in a wide range of applications.

Working Principle

The MAX1812EUB+T power IC works on the principle of pulse-width modulation (PWM). This modulation technique is useful for purposes of providing regulated output voltage. PWM signals are square waves of high frequency and are composed of two patterns of timing. The "On-time" is when the pulse is high and the "Off-time" is the low period. The duty cycle of the signals, the ratio between on and off times, is then used to regulate the output voltage.

The MAX1812EUB+T utilizes an external resistor to program the output voltage. In order to achieve power efficiency, the power supply features a 200kHz switching frequency. With such a high frequency, the input and output noise is also kept at a minimum. The external components count is also kept at a bare minimum, allowing for a compact, small form factor.

The MAX1812EUB+T also features built-in protection features. Thermal shut down, current limiter, and over-voltage protection are all included, allowing the IC to be implemented in a wide range of applications.

Conclusion

The MAX1812EUB+T is a high-performance IC designed to provide a power solution for handheld and battery operated systems. With its flexible feature set and low external component count, it is ideal for many applications. Its main advantage lies in its ability to efficiently regulate the output voltage over a wide range of inputs while minimizing input and output ripple. It also has several protection features to ensure a robust operation.