LM1589R

2.7A, 1.2V L.D.O. VOLTAGE REGULATOR FEATURES ● Low Dropout Voltage 1.3V at 2.7A Output Current ● Fast Transient Response ● 0.2% Line Regulation ● Load Regulation : 0.15% typical ● Internal Thermal and Current Limiting ● Surface Mount Package TO-220 & TO-263 (D2 Package) ● On-chip thermal Limiting ● Moisture Sensitivity Level 3 TO-220 PKG LM1589 APPLICATIONS ● Battery Charger ● Low voltage logic supplies ● Constant Current Regulators ● Portable Instrumentation ● High Efficiency Linear Power Supplies ● High Efficiency "Green" Computer Systems ● SMPS Post-Regulator ● Power PC Supplies ● Powering VGA & Sound Card TO-263 PKG 1. Adj/Gnd 2. Output 3. Input ORDERING INFORMATION Device Name LM1589T-X.X LM1589R-X.X Package TO-220 TO263 (D2) DESCRIPTION The LM1589 is a low dropout three-terminal regulator with 2.7A output current capability. This device has been optimized for V TT bus termination, where transient response and mini-mum input voltage are critical. The LM1589 offers fixed 1.2V with 2.7A current capability for a GTL+ bus V TT termination. Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting pro-vides protection against any combination of overload and ambient temperature that would create excessive junction temperatures. The LM1589 is available in the industry-standard TO-220, TO-263 power packages. TEST & TYPICAL APPLICATION CIRCUIT VIN = 2.7 ~ 7 2008 - Ver 1.0 −1− HTC 2.7A, 1.2V L.D.O. VOLTAGE REGULATOR LM1589 ABSOULTE MAXIMUM RATINS CHARACTERISTIC Supply Voltage Operating Junction Temperature Range Storage Temperature Range Thermal Resistance Junction to Case TO-263 Thermal Resistance Junction to Ambient TO-263 Lead Temperature (Soldering) 10 sec. Maximum Output Current SYMBOL Vin Topr Tstg Tjc Tja Tsol Imax VALUE 7 -10~125 -65~150 3 60 300 2.7 UNIT V ℃ ℃ C/W C/W ℃ A ELECTRICAL CHARACTERISTICS Typicals and limits appearing in normal type apply for Tj= +25°C. The * denotes specifications which apply over the specified operating temperature range. 4 mA Notes: 1.See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation aremeasured 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 byinput/output differential and the output currrent. Guaranteed maximum output power will not be available over the full input/output voltage range. −2− HTC 2.7A, 1.2V L.D.O. VOLTAGE REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS LM1589 −3− HTC 2.7A, 1.2V L.D.O. VOLTAGE REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS LM1589 −4− HTC