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| Preliminary PJ1537 Dual 1A Low Dorpout Fixed Voltage Regulators T he PJ1537 provides 2 output voltage : 3.3V and either 2.5V or 1.8V fixed with 1.0A each output current TO-263-5L capability. These devices have been optimized for low voltage where transient response and miniumum input voltage critical. Current limit features protect the outputs against short circuit currents. On-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create excessive junction temperatures. The PJ1537 series regulators are available in 5-lead TO-263 power packages. Pin 1. VIN 2. NC 3. GND 4. V1 5. V2 FEATURES Hard Disk Drives, CD-ROMs, DVDs High efficiency linear regulators Post regulators for switching supplies ADSL and Cable Modems 5V to 3.3V and 2.5V linear regulators Motherboard with multiple supplies ORDERING INFORMATION Device PJ1537CM Operating Temperature 0 TO 75 Package TO-263 APPLICATIONS Battery protection Load switch Power management BLOCK DIAGRAM 1-3 2003/02.rev.A Preliminary PJ1537 Dual 1A Low Dorpout Fixed Voltage Regulators MAXIMUM RATINGS Parameter Input Voltage Operating Junction Temperature Range Storage Temperature Range Lead Temperature(Soldering, 10sec) Symbol VIN TJ Tstr Value 10 0 to 150 -65 to 150 300 Unit V ELECTRICAL CHARACTERISTICS(VIN7V, TJ=25(unless otherwise specified)) The Denotes specifications which apply over the specified operating temperature range of 0 to 125 junction temperature. Characteristics Output Voltages 1 Symbol Vout1 Vout2 RegLine Vdrop Ilmt Iload(min) IQ GRR2 GRR Junction Temperature Conditions 10mAIOUT1A 4.75VVIN7V 10mAIOUT1A 4.75VVIN7V From VIN4.75V 4.75VVIN7V,IOUT=10mA 4.75VVIN7V,IOUT=1mA VOUT= 1,IOUT=1A VIN=5V 4.75VVIN7V VIN=7V F=120Hz, COUT=22f Tantalum, VIN=5V, IOUT=1A TA=125, 1000hrs TA=125, 10Hzf10kHz TO-263 Min. -2 Typ. Max. +2 Unit V Output Voltages 2 Time to Output Voltages Valid Line Regulation 1,2(both Outputs) Dropout Voltage(3.3 output) Current Limit(Both outputs) Minimum Load Current(Both outputs) Quiescent Current Ripple Rejection 3(both outputs) Long-Term Stability Ripple Rejection Thermal Resistance, Junction to case Thermal Shutdown Thermal Shutdown Hysteresis Notes: 3.2 1.0 1.0 60 60 - 5 0.005 0.05 1.1 1.5 6 0.03 2.5 2 155 10 0.5 0.5 1.3 15 1.0 - V msec V A mA mA dB dB /W 1. See thermal regulation sperifications for changes in output voltage due to heation effects. Load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 2. 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. 2-3 2003/02.rev.A Preliminary PJ1537 Dual 1A Low Dorpout Fixed Voltage Regulators TO-263-5L DIMENSION DIM MILLIMETERS MIN MAX 10.26 15.87 0.77 1.827 4.57 1.27 2.79 0.32 8.28 1.80 MIN 0.402 0.575 0.030 0.062 0.179 0.049 0.090 0.011 0.324 0.060 INCHES MAX 0.404 0.625 0.030 0.072 0.180 0.05 0.110 0.013 0.326 0.071 A J I B E F A B C D E 10.22 14.60 0.75 1.573 4.56 1.24 2.28 0.28 8.24 1.54 G C D H F G H I J 3-3 2003/02.rev.A |
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