MAX1631 Datasheet PDF

●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