General Description
●The MAX1630–MAX1635 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 net works, and automatic bootstrapping.
●Features
●♦96% Efficiency
●♦+4.2V to +30V Input Range
●♦2.5V to 5.5V Dual Adjustable Outputs
●♦Selectable 3.3V and 5V Fixed or Adjustable Outputs (Dual Mode™)
●♦12V Linear Regulator
●♦Adjustable Secondary Feedback
●(MAX1631/MAX1634)
●♦5V/50mA Linear Regulator Output
●♦Precision 2.5V Reference Output
●♦Programmable Power-Up Sequencing
●♦Power-Good (RESET) Output
●♦Output Overvoltage Protection
●(MAX1630/MAX1631/MAX1632)
●♦Output Undervoltage Shutdown
●(MAX1630/MAX1631/MAX1632)
●♦200kHz/300kHz Low-Noise, Fixed-Frequency Operation
●♦Low-Dropout, 99% Duty-Factor Operation
●♦2.5mW Typical Quiescent Power (+12V input, both SMPSs on)
●♦4μA Typical Shutdown Current
●♦28-Pin SSOP Package
●Applications
●Notebook and Subnotebook Computers
●PDAs and Mobile Communicators
●Desktop CPU Local DC-DC Converters
