Datasheet4U Logo Datasheet4U.com

MAX1844 Datasheet High-speed Step-down Controller

Manufacturer: Maxim Integrated (now Analog Devices)

Overview: MAX1844 19-1993; Rev 3; 9/02 EVAALVUAAILTAIOBNLEKIT High-Speed Step-Down Controller with Accurate Current Limit for Notebook puters.

General Description

The MAX1844 pulse-width modulation (PWM) controller provides high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage CPU core or chipset/RAM supplies in notebook puters.

Maxim’s proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency.

Efficiency is enhanced by an ability to drive very large synchronous-rectifier MOSFETs.

Key Features

  • o Ultra-High Efficiency o Accurate Current-Limit Option o Quick-PWM with 100ns Load-Step Response o 1% VOUT Accuracy Over Line and Load o 1.8V/2.5V Fixed or 1V to 5.5V Adjustable Output Range o 2V to 28V Battery Input Range o 200/300/450/600kHz Switching Frequency o Adjustable Overvoltage Protection o Adjustable Undervoltage Protection o 1.7ms Digital Soft-Start o Drives Large Synchronous-Rectifier FETs o 2V ±1% Reference Output o Power-Good Window Comparator Ordering Information PART MAX1844E.

More Datasheets from Maxim Integrated (now Analog Devices)

Part Number Description
MAX1820 WCDMA Cellular Phone 600mA Buck Regulators
MAX1821 WCDMA Cellular Phone 600mA Buck Regulators
MAX1823 Dual USB Switch
MAX1823A Dual USB Switch
MAX1823B Dual USB Switch
MAX1823H Dual USB Switch
MAX185 (MAX183 - MAX185) High-Speed 12-Bit A/D Converters
MAX1897 Quick-PWM Slave Controllers
MAX1026 10-Bit 300ksps ADCs
MAX1027 (MAX1027 - MAX1031) 10-Bit 300ksps ADCs

MAX1844 Distributor