lt1581ct7-pbf Linear Technology Corporation, lt1581ct7-pbf Datasheet
lt1581ct7-pbf
Related parts for lt1581ct7-pbf
lt1581ct7-pbf Summary of contents
Page 1
... A small capacitor on the ADJUST pin further improves transient response. This device is ideal for generating processor supplies motherboards where both 5V and 3.3V supplies are available. , LTC and LT are registered trademarks of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation. 0.8 2.5V/10A ...
Page 2
... Pulse Thermal Resistance, Junction-to-Case Control Circuitry/Power Transistor 2 U RATINGS PACKAGE/ORDER TAB IS OUTPUT *PIN2 = NC FOR LT1581CT7, GND FOR LT1581CT7-2.5 Consult factory for Industrial and Military grade parts. The denotes specifications which apply over the full operating = 25 C. (Note 5V 3.3V 0mA ...
Page 3
ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER CONDITIONS Dropout Voltage (Note 3) Minimum V : LT1581-2.5 V CONTROL POWER (V – CONTROL OUT POWER V POWER V POWER V POWER Minimum V : LT1581 ...
Page 4
LT1581/LT1581-2 TYPICAL PERFORMANCE CHARACTERISTICS Control Pin Current vs Output Current 200 INDICATES GUARANTEED TEST POINTS 180 160 140 120 DATA SHEET LIMIT 100 80 TYPICAL 60 DEVICE ...
Page 5
W BLOCK DIAGRA ADJ U U APPLICATIONS INFORMATION The LT1581 is a low dropout regulator designed to power the new generation of microprocessors. Low dropout regulators have become more common in desktop com- puter systems as microprocessor manufacturers have moved ...
Page 6
LT1581/LT1581-2 APPLICATIONS INFORMATION processors cycle load current from several hundred mil- liamperes to several amperes in tens of nanoseconds. Output voltage tolerances are tighter and include transient response as part of the specification. The LT1581 is designed to ...
Page 7
U U APPLICATIONS INFORMATION 5V CONTROL 3.3V POWER SENSE LT1581 OUTPUT ADJ R1 R2 Figure 1. Conventional Load Sensing 5V CONTROL 3.3V SENSE POWER LT1581 OUTPUT ADJ R1 R2 Figure 2. Remote Load Sensing ( I )(R ) OUT P ...
Page 8
LT1581/LT1581-2 APPLICATIONS INFORMATION network must handle until the regulator throttles to the load current level. Capacitors are not ideal elements and contain parasitic resistance and inductance. These para- sitic elements dominate the change in output voltage at the ...
Page 9
U U APPLICATIONS INFORMATION 1000 F to 5000 F, and with the V neously shorted to ground can damage occur. A crowbar circuit at the power input can generate those levels of current and a diode from output to power ...
Page 10
LT1581/LT1581-2 APPLICATIONS INFORMATION where I is equal to between I CONTROL I /58 (max). OUT function of output current. A curve of CONTROL can be found in the Typical Performance CONTROL OUT ...
Page 11
... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 2.5V/10A Regulator ...
Page 12
... SELECT PIN 1581 TA04 COMMENTS > 90% Efficiency High Current Microprocessor Supply > 90% Efficiency in 12V to 3.3V Applications Fast Transient Response, No Bulk Capacitors Needed For 3.3V to 2.XXV Applications For High Performance Microprocessors For High Performance Microprocessors 158125fa LT/TP 0399 2K REV A • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1996 ...