SupIRBuck HIGHLY INTEGRATED Description IR3821A SupIRBu
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IR3821AMPbF
SupIRBuck
HIGHLY INTEGRATED
Description
IR3821A SupIRBuckis easy-to-use, fully integrated highly efficient DC/DC regulator. onboard switching controller MOSFETs make IR3821A space-efficient solution, providing accurate power delivery output voltage applications. IR3821A operates from 4.5V input supply generates output voltage adjustable from 0.6V 0.75*Vin loads versatile regulator offering programmability startup time, power good threshold current limit, IR3821A's fixed 300kHz switching frequency allows small external components. IR3821A also features important protection functions, such Pre-Bias startup, hiccup current limit thermal shutdown provide required system level security event fault conditions.
WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
Wide Input Voltage Range 2.5V Wide Output Voltage Range 0.6V Continuous Load Capability 300kHz High Frequency Operation Programmable Over-Current Protection Programmable PGood Output Hiccup Current Limit Precision Reference Voltage (0.6V) Programmable Soft-Start Pre-Bias Start-up Thermal Protection Thermally Enhanced Package Small Size 5mmx6mm Pb-Free (RoHS Compliant)
Applications
Distributed Point-of-Loads Server Workstations Embedded Systems Storage Systems Applications Graphics Cards Game Consoles Computing Peripheral Voltage Regulators
Fig. Typical application diagram 11/28/07
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