MAX1901 Overview
Description
The MAX1901/MAX1902/MAX1904 are buck-topology, step-down, switch-mode, power-supply controllers that generate logic-supply voltages in battery-powered systems. These high-performance, dual/triple-output devices include on-board power-up sequencing, power-good signaling with delay, digital soft-start, secondary winding control, low dropout circuitry, internal frequency-compensation networks, and automatic bootstrapping.
Key Features
- a logic-controlled and synchronizable, fixed-frequency, pulse-width modulation (PWM) operating mode
- This reduces noise and RF interference in sensitive mobile communications and pen-entry applications
- Asserting the SKIP pin enables fixed-frequency mode, for lowest noise under all load conditions
- The MAX1901/MAX1902/MAX1904 include two PWM regulators, adjustable from 2.5V to 5.5V with fixed 5.0V and 3.3V modes
- All these devices include secondary feedback regulation, and the MAX1902 contains a 12V/120mA linear regulator
- The MAX1901/MAX1902 contain internal output overvoltage and undervoltage protection features
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