【数据手册】SPX2941 电源芯片数据手册 V1.01

【数据手册】SPX2941 电源芯片数据手册 V1.01

FEATURES ■ Adjustable Output Down To 1.25V ■ Low Quiescent Current ■ Guaranteed 1.5A Peak Output Current ■ Low Dropout Voltage of 280mV @ 1A ■ Extremely Tight Load and Line Regulation ■ Extremely Fast Transient Response ■ Reverse-battery Protection ■ Internal Thermal and Current Limit Protection ■ Zero Current Shutdown ■ Standard TO-220 and TO-263 packages Figure 1. Adjustable Output Linear Regulator The SPX2941 is a 1A, accurate voltage regulator with a low drop out voltage of 280mV(typ.) at 1A. These regulators are specifically designed for low voltage applications that require a low dropout voltage and a fast transient response. They are fully fault protected against over-current, reverse battery, and positive and negative voltage transients. The SPX2941 is offered in 5-pin TO-220 & TO-263 packages. For a 3A version, refer to the SPX29300 data sheet. SPX2941 V V OUT IN GND ADJ 4 2 3 5 1 R1 R2 6.8+F 10+F + EN + TYPICAL APPLICATIONS CIRCUIT Now Available in Lead Free Packaging APPLICATIONS ■ Powering VGA & Sound Card ■ LCD Monitors ■ USB Power Supply ■ Power PC Supplies ■ SMPS Post-Regulator ■ High Efficiency Linear Power Supplies ■ Battery Charger ■ Portable Instrumentation ■ Constant Current Regulators ■ Adjustable Power Supplies 1 2 3 4 5 SPX2941 5 Pin TO-263 VIN GND VOUT ADJUST ENABLE Adjustable Output, Fast Response Date: Sept 28-06 Rev E SPX2941 1A Low Dropout Linear Regulator © 2006 Sipex Corporation ABSOLUTE MAXIMUM RATINGS Lead Temperature (soldering, 5 seconds) ................260°C Storage Temperature Range........................-65°C to +150°C PARAMETER CONDITIONS MIN. TYP. MAX UNIT Reference Voltage Adjustable version only 1.228 1.240 1.252 V 1.215 1.265 Adjust Pin Bias Current 40 80 V 120 Reference Voltage (NOTE4) 20 ppm/ °C Temperature Coefficient Adjust Pin Bias Current 0.1 nA/°C Temperature Coefficient Line Regulation I OUT=10mA, (VOUT+1V))VIN)16V 0.2 1.0 % Load Regulation VIN=VOUT+1V, 10mA)I OUT)I FULL 0.3 1.5 % Dropout Voltage (Note1) IOUT=100mA 70 200 mV (except 1.8V version) IOUT=1A 280 550 Ground Current (Note3) IOUT=750mA, VIN=VOUT+1V 12 25 mA I OUT=1A 18 Ground Pin Current at VIN=0.1V less than specified VOUT, 1.2 mA Dropout I OUT=10mA Current Limit VOUT=0V (Note2) 1.5 2.2 A Output Noise Voltage 10Hz to 100kHz, IOUT =100mA, CL=10+F 400 +VRMS CL=33+F 260 Input Logic Voltage LOW (OFF) VIN<10V 0.8 V HIGH (ON) 2.4 ENABLE Input Pin Current VEN=16V 100 600 +A 750 VEN=0.8V 1 +A 2 Regulator Output Current (NOTE5) 10 +A in Shutdown 500 Thermal Resistance TO-220 Junction to Case, at Tab 3 °C/W Junction to Ambient 29.3 TO-263 Junction to Case, at Tab 3 °C/W Junction to Ambient 31.2 VIN=VOUT+ 1V, I OUT=10mA, CIN=6.8+F, COUT=10+F, TA= 25 °C, unless otherwis specified. The boldface applies over the junction temperature range. Adjustable versions are set at +5.0V. Operating Junction