Details, datasheet, quote on part number: FAN1582P25X
PartFAN1582P25X
Category
Description3A Adjustable Low Dropout Voltage Regulator (LDO)
CompanyFairchild Semiconductor
DatasheetDownload FAN1582P25X datasheet
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Features, Applications

Features

Ultra Low dropout voltage, 0.4V typical at 3A Remote sense operation Fast transient response Load regulation: 0.05% typical 0.5% initial accuracy On-chip thermal limiting 5-Pin SPAK, TO-252 DPAK, and TO-263 packages

Description

The FAN1582, FAN1582-1.5, and FAN1582-2.5 are ultra-low dropout regulators with 3A output current capability. These devices have been optimized for low voltage applications including VTT bus termination, where transient response and minimum input voltage are critical. The FAN1582 is ideal for low voltage microprocessor applications requiring a regulated output from to 5.7V with a power input supply to 6.5V. The FAN1582-1.5 offers fixed 1.5V with 3A current capabilities for GTL+ bus VTT termination. The FAN1582-2.5 offers fixed 2.5V with 3A current capability for logic IC operation and processors while minimizing the overall power dissipation. Current limit ensures controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create excessive junction temperatures. The FAN1582 series regulators are available in the 5-Pin SPAK, TO-252 DPAK, and TO-263 power packages.

Applications

Pentium® Processors PowerPCTM, AMD K5 and K6 processors Pentium support of GTL+ bus supply Low voltage logic supply Embedded Processor supplies Split plane regulator New 2.5V and 1.8V Logic Families

Typical Applications

VIN 3.3V 10µF VIN 3.3V 10µF VCNTL 5V + VIN VSENSE VCNTL + 22µF VIN 5.75V 10µF VCNTL 12V + VIN VSENSE + VIN VSENSE FAN1582­2.5 VOUT VCNTL GND

Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.

FAN1582M-1.5, -2.5 FRONT VIEW FAN1582M FRONT VIEW FAN1582P FRONT VIEW FAN1582P-1.5, -2.5 FRONT VIEW FAN1582D FRONT VIEW FAN1582D-1.5, -2.5 FRONT VIEW


*With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, JA can vary from 30 °C/W to more than 40 °C/W. Other mounting techniques can provide a thermal resistance lower than 30 °C/W.

Pin Function Descrition Remote Voltage Sense. Connect this pin to the load to permit true remote sensing and avoid trace drops. Adjust or Ground. On the FAN1582, this pin forms the feedback to determine the output voltage. On the FAN1582-1.5 and -2.5, connect this pin to ground. Output Voltage. This pin and the tab are output. Control Voltage. This pin draws small-signal power to control the FAN1582 circuitry. Connect to a voltage higher than VIN, as shown in the applications circuits. Input Voltage.

Thermal Shutdown Current Limit 3 Output 1 Sense 2 Adj

Parameter VIN VCNTL Operating Junction Temperature Range Lead Temperature (Soldering, 10 sec.) Storage Temperature Range -65 0 Min. Max. Unit V °C

TJ=25°C, VOUT = VS, VADJ = 0V unless otherwise specified. The denotes specifications which apply over the specified operating temperature range. Parameter Reference Voltage3 Reference Voltage3 Conditions VIN = 2.0V, VCNTL = 2.75V, IOUT 10mA 2.05V VIN 5.5V, 2.7V VCNTL 12V, 10mA IOUT 3A 3V VIN 7V (function of Vout), 10mA IOUT 3A 3V VIN 7V, 10mA IOUT 3A 5.1V VIN 7V, 10mA IOUT 3A 1.75V VIN 5.5V, 2.5V VCNTL 12V, IOUT = 10mA VIN = 2.1V, VCNTL 2.75V, 10mA IOUT 3A VIN = 2.05V, VREF = 1%, IOUT = 3A VCNTL = 2.75V, VREF = 1%, IOUT = 3A VCNTL = 2.75V, VREF = 1%, IOUT = 3A VIN = 2.05V, VCNTL = 2.75V VIN = 2.05V, VCNTL = 2.75V, IOUT = 10mA VIN = 2.05V, VCNTL = 2.75V VIN = 3.3V, VCNTL = 5V VIN = 3.75V, VCNTL = 120Hz, COUT = 22µF Tantalum, IOUT 1.5A TO-263/TO-252 SPAK 25°C, 30ms pulse Min. 1.243 1.237 Typ. 1.250 Max. 1.257 1.263 Units V

Adjustable Output Voltage Output Voltage4 Output Voltage5 Line Regulation1,2 Load Regulation1,2 Dropout Voltage Minimum (VCNTL­VOUT) Dropout Voltage Minimum (VIN­VOUT) Dropout Voltage Minimum VIN Current Limit Control Pin Current Adjust Pin Current3 Minimum Load Current Ripple Rejection Thermal Resistance, Junction to Case Thermal Regulation Thermal Shutdown

Notes: 1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 2. Line and load regulation are guaranteed up to the maximum power dissipation (18W). Power dissipation is determined by input/output differential and the output current. Guaranteed maximum output power will not be available over the full input/ output voltage range. 3. FAN1582 only. 4. FAN1582-1.5 only. 5. FAN1582-2.5 only.


 

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