LX8554-33CDD

LX8554-33CDD Datasheet

LX8554-xx

Part	Datasheet
LX8554-33CDD	LX8554-33CDD (pdf)

Related Parts	Information
LX8554-00CDD	LX8554-00CDD
LX8554-00CP	LX8554-00CP
LX8554-33CP	LX8554-33CP

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L I N D O C # 8554 LX8554-xx 5A EXTREMELY LOW DROPOUT POSITIVE REGULATORS PR O D U C T I O N DATASHEET The LX8554 series ICs are very low dropout three-terminal positive regulators with 5A rated output current. This product family is ideally suited for Processor and Power PCTM applications requiring fast transient response. The LX8554 is guaranteed to have a dropout voltage under 1V at 5A load, making it ideal to provide well-regulated outputs of 2.5V to 3.6V with input supply as low as 4.75V. Fixed versions are also available and are specified in the Available Options table below. Current limit is trimmed above 5.1A to ensure adequate output current and con- trolled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures. The LX8554 series products are available in both through-hole and surfacemount versions of industry standard 3-pin TO-220 / TO-263 power packages. The LX8554 family of products are ideal for use in multiple processor applications where output voltage is jumper selected. The LX8554 ICs offer precision output as well as low supply operation see application below . For higher current applications see the LX8584 series of products. PRODUCT HIGHLIGHT TYPICAL APPLICATION OF THE LX8554 IN A FLEXIBLE MOTHERBOARD WITH OUTPUT VOLTAGE SELECTABLE VIA JUMPERS "JP1" AND "JP2" 1500µF, 6.3V Sanyo MVGX Series LX8554 VREF 121W 200W 1% See Table Below 3x 1500µF 6.3V Sanyo MVGX Series 13W 1% VOUT = VREF R2 R1 + IADJ R2 14.7W 1% KEY FEATURES s THREE-TERMINAL ADJUSTABLE OR FIXED OUTPUT s GUARANTEED 1V HEADROOM AT 5A s OUTPUT CURRENT OF 5A p FAST TRANSIENT RESPONSE p 1% VOLTAGE REFERENCE INITIAL ACCURACY p OUTPUT SHORT-CIRCUIT PROTECTION p BUILT-IN THERMAL SHUTDOWN s EVALUATION BOARD AVAILABLE: REQUEST LXE9001 EVALUATION KIT A P L I C AT I O N S s PENTIUM PROCESSOR SUPPLIES s POWER PC SUPPLIES s MICROPROCESSOR SUPPLIES s LOW VOLTAGE LOGIC SUPPLIES s BATTERY POWERED CIRCUIT s POST REGULATOR FOR SWITCHING SUPPLY AVAILABLE O PTIONS PER PAR T # Part # Output Voltage LX8554-00 Adjustable LX8554-33 3.3V Other voltage options may be available Please contact factory for details. Open Short Open Short OUTPUT VOLTAGE 3.6V 3.45V 3.3V

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L I N D O C # 8554

LX8554-xx
5A EXTREMELY LOW DROPOUT POSITIVE REGULATORS PR O D U C T I O N DATASHEET

The LX8554 series ICs are very low dropout three-terminal positive regulators with 5A rated output current. This product family is ideally suited for Processor and Power PCTM applications requiring fast transient response. The LX8554 is guaranteed to have a dropout voltage under 1V at 5A load, making it ideal to provide well-regulated outputs of 2.5V to 3.6V with input supply as low as 4.75V. Fixed versions are also available and are specified in the Available Options table below.

Current limit is trimmed above 5.1A to ensure adequate output current and con-
trolled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures.

The LX8554 series products are available in both through-hole and surfacemount versions of industry standard 3-pin TO-220 / TO-263 power packages.

The LX8554 family of products are ideal for use in multiple processor applications where output voltage is jumper selected. The LX8554 ICs offer precision output as well as low supply operation see application below . For higher current applications see the LX8584 series of products.

PRODUCT HIGHLIGHT

TYPICAL APPLICATION OF THE LX8554 IN A FLEXIBLE MOTHERBOARD WITH OUTPUT VOLTAGE SELECTABLE VIA JUMPERS "JP1" AND "JP2"
1500µF, 6.3V Sanyo MVGX Series

LX8554

VREF
121W
200W 1%

See Table Below
3x 1500µF 6.3V Sanyo MVGX Series
13W 1%

VOUT = VREF

R2 R1
+ IADJ R2
14.7W 1%

KEY FEATURES
s THREE-TERMINAL ADJUSTABLE OR FIXED OUTPUT
s GUARANTEED 1V HEADROOM AT 5A s OUTPUT CURRENT OF 5A p FAST TRANSIENT RESPONSE p 1% VOLTAGE REFERENCE INITIAL

ACCURACY p OUTPUT SHORT-CIRCUIT PROTECTION p BUILT-IN THERMAL SHUTDOWN s EVALUATION BOARD AVAILABLE:

REQUEST LXE9001 EVALUATION KIT

A P L I C AT I O N S
s PENTIUM PROCESSOR SUPPLIES s POWER PC SUPPLIES s MICROPROCESSOR SUPPLIES s LOW VOLTAGE LOGIC SUPPLIES s BATTERY POWERED CIRCUIT s POST REGULATOR FOR SWITCHING SUPPLY

AVAILABLE O PTIONS PER PAR T #

Part #

Output Voltage

LX8554-00

Adjustable

LX8554-33
3.3V

Other voltage options may be available Please contact factory for details.

Open Short

Open Short

OUTPUT VOLTAGE
3.6V 3.45V 3.3V

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived LX8554-33CDD Datasheet file may be downloaded here without warranties.

Datasheet ID: LX8554-33CDD 648164