MAX8568A/MAX8568B Complete Backup-Management ICs for Lithium and NiMH Batteries
The MAX8568A/MAX8568B also manage backup switch over from a primary power source. An accurate on-chip voltage detector monitors the main supply and backs up two system supplies (typically I/O and memory)when main power falls. On-chip drivers switch external MOSFETs to disconnect the main supply from the system loads so the backup source is not drained.
Low-voltage backup cells can be stepped up by an on-chip synchronous-rectified, low-quiescent-current boost converter. Additionally, a low-quiescent-current LDO generates a second backup voltage. The MAX8568A LDO is preset to 2.5V while the MAX8568B LDO is preset to 1.8V.
Both devices are supplied in 16-pin 3mm x 3mm thin QFN packages rated for -40°C to +85°C operation.
●Features:
■Automatically Manage All Backup Switch over Functions
■Charge Both NiMH and Rechargeable Lithium Backup Batteries
■On-Chip Battery Boost Converter for 1-Cell NiMH
■Two Backup Output Voltages
■Programmable Charge Current
■Programmable Charge Voltage Limit
■Low 17μA Operating Current in Backup Mode
■Eliminate Many Discrete Components
■Tiny 3mm x 3mm Thin QFN Package
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Complete Backup-Management ICs 、 backup-battery-management ICs |
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[ PDAs ][ PDA Phones ][ Smart Phones ][ DSCs ][ DVCs ][ Palmtops Handhelds ][ Wireless Handhelds ][ Internet Appliances ][ Web-Books ] |
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Datasheet |
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Please see the document for details |
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QFN |
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English Chinese Chinese and English Japanese |
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5/05 |
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Rev 1 |
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19-3450 |
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745 KB |
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