AT73C237_14 Datasheet, PDF (31/33 Pages) ATMEL Corporation – Applications: GPS Modules, WLAN Devices, Wireless Modules

AT73C237
Table of Contents
Features ..................................................................................................... 1
1 Description ............................................................................................... 1
2 Block Diagram .......................................................................................... 2
3 Pin Description ......................................................................................... 3
4 Application Block Diagram ..................................................................... 4
5 Electrical Characteristics ........................................................................ 5
5.1 Absolute Maximum Ratings ...............................................................................5
5.2 Recommended Operating Conditions ...............................................................5
5.3 Quiescent Current In Different Operating Modes ..............................................6
6 Startup Procedure .................................................................................... 7
6.1 At VDD4 Rising ..................................................................................................7
6.2 At VDD3 Falling .................................................................................................7
7 Timing Diagram ........................................................................................ 9
8 Electrical Specification .......................................................................... 10
8.1 LDO1 ...............................................................................................................10
8.2 LDO2 ...............................................................................................................12
8.3 LDO3 ...............................................................................................................14
8.4 LDO4 ...............................................................................................................16
8.5 High Performance Bandgap (HPBG) ...............................................................17
8.6 Low Power Bandgap (LPBG) ..........................................................................17
8.7 Voltage Monitor ...............................................................................................17
8.8 XRESIN ...........................................................................................................18
8.9 XRESO ............................................................................................................18
8.10 TWCK ..............................................................................................................18
8.11 TWD ................................................................................................................18
9 Functional Description .......................................................................... 19
9.1 LDO1 ...............................................................................................................19
9.2 LDO2 ...............................................................................................................20
9.3 LDO3 ...............................................................................................................21
9.4 LDO4 ...............................................................................................................22
9.5 High Performance Bandgap (HPBG) ...............................................................22
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6362A–PMAAC–01-Jul-08