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See Technical Specifications

MAX1540 +BOM

DualStep-DownControllerswithSaturationProtection,DynamicOutput,andLinearRegulator

Manufacturer:

MAXIM
Mfr.Part #:

MAX1540
Datasheet:

MAX1540 Datasheet (PDF)
Package/Case:

QFN
Product Type:

Switching Regulator or Controllers
EDA/CAD Models:

Request Free CAD Models for MAX1540

MAX1540 General Description

General DescriptionThe MAX1540/MAX1541 dual pulse-width modulation (PWM) controllers provide the high efficiency, excellent transient response, and high DC-output accuracy necessary for stepping down high-voltage batteries to generate low-voltage chipset and RAM power supplies in notebook computers.Features♦ Inductor-Saturation Protection♦ Accurate Differential Current-Sense Inputs♦ Dual Ultra-High-Efficiency Quick-PWMs with 100ns Load-Step Response♦ MAX1540 1.8V/1.2V Fixed or 0.7V to 5.5V Adjustable Output (OUT1) 2.5V/1.5V Fixed or 0.7V to 5.5V Adjustable Output (OUT2) Fixed 5V, 100mA Linear Regulator♦ MAX1541 External Reference Input (REFIN1) Dynamically Selectable Output Voltage—0.7V to 5.5V (OUT1) 2.5V/1.8V Fixed or 0.7V to 5.5V Adjustable Output (OUT2) Optional Power-Good and Fault Blanking During Transitions Fixed 5V or Adjustable 100mA Linear Regulator♦ 1% VOUT Accuracy over Line and Load♦ 2V to 28V Battery Input Range♦ 170kHz to 620kHz Selectable Switching Frequency♦ Overvoltage/Undervoltage-Protection Option♦ 1.7ms Digital Soft-Start♦ Drives Large Synchronous-Rectifier FETs♦ 2V ±0.7% Reference Output♦ Separate Power-Good Window ComparatorsApplications Notebook Computers Core/IO Supplies as Low as 0.7V 0.7V to 5.5V Supply Rails CPU/Chipset/GPU with Dynamic Voltage Core Supplies (MAX1541) DDR Memory Termination (MAX1541) Active Termination Buses (MAX1541)