LTM4639

LTM4639 FEATURES Low VIN 20A DC/DC µModule Step-Down Regulator DESCRIPTION n Complete 20A Switch Mode Power Supply n 2.375V to 7V Input Voltage Range (VIN < 4.5V, Need CPWR Bias) n 0.6V to 5.5V Output Voltage Range n ±1.5% Maximum Total DC Output Voltage Error (–40°C to 125°C) n Differential Remote Sense Amplifier for Precision Regulation (VOUT ≤ 3.3V) n Current Mode Control/Fast Transient Response n Parallel Multiphase Current Sharing (Up to 80A) n Frequency Synchronization n Selectable Pulse-Skipping or Burst Mode® Operation n Soft-Start/Voltage Tracking n Up to 88% Efficiency (3.3VIN, 1.5VOUT) n Overcurrent Foldback Protection n Output Overvoltage Protection n Internal Temperature Monitor n Overtemperature Protection n 15mm × 15mm × 4.92mm BGA Package APPLICATIONS n Telecom Servers and Networking Equipment n Industrial Equipment n Medical Systems n High Ambient Temperature Systems n 3.3V Input Systems The LTM®4639 is a complete 20A output high efficiency switch mode step-down DC/DC µModule (micromodule) regulator. Included in the package are the switching controller, power FETs, inductor and compensation components. Operating over an input voltage range from 2.375V to 7V, the LTM4639 supports an output voltage range of 0.6V to 5.5V, set by a single external resistor. Only a few input and output capacitors are needed. Current mode operation allows precision current sharing of up to four LTM4639 regulators to obtain up to 80A output. High switching fre...