Details, datasheet, quote on part number: FAN1589D
Description2.7A, 1.2V Low Dropout Linear Regulator For VRM8.5
CompanyFairchild Semiconductor
DatasheetDownload FAN1589D datasheet
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Features, Applications


Fast transient response Low dropout voltage to 2.7A Load regulation: 0.05% typical Trimmed current limit On-chip thermal limiting Standard TO-263, TO-263 center cut and TO-252 (DPAK) packages


The is a low dropout three-terminal regulator with 2.7A output current capability. This device has been optimized for VTT bus termination, where transient response and minimum input voltage are critical. The FAN1589 offers fixed 1.2V with 2.7A current capability for a GTL+ bus VTT termination. Current limit is trimmed to ensure specified output current and 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 FAN1589 is available in the industry-standard TO-263, TO-263 center cut and TO-252 (DPAK) power packages.

A GTL+ bus supply for VRM 8.5 Low voltage logic supply Post regulator for switching supply

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

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

= 25C unless otherwise specified. The denotes specifications which apply over the specified operating temperature range. Parameter Output Voltage Line Regulation1, 2 Load Regulation1, 2 Dropout Voltage Current Limit Minimum Load Current Quiescent Current Ripple Rejection Thermal Regulation Temperature Stability Long-Term Stability RMS Output Noise of VOUT) Thermal Resistance, Junction to Case Thermal Shutdown 125C, 1000 hrs. TO-263, TO-252 Conditions 3.3V VIN 7V 10mA IOUT 2.7A (VOUT + 1.5V) VIN 7V, IOUT = 10mA (VIN VOUT) 3V 10mA IOUT 2.7A VREF = 1%, IOUT = 2.7A (VIN VOUT) 2V 1.5V (VIN VOUT) 5.75V VIN = 120Hz, COUT = 22F Tantalum, (VIN VOUT) = 3V, IOUT 25C, 30ms pulse Min. 1.176 Typ. Max Units mA dB %/W % C/W C

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 currrent. Guaranteed maximum output power will not be available over the full input/ output voltage range.


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