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1、1 Date 6 8 2004SPX3819 500mA Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation 500mA Low Noise LDO Voltage Regulator DESCRIPTION FEATURES Low Noise 40 V Possible High Accuracy 1 Reverse Battery Protection Low Dropout 340mV at Full Load Low Quiescent Current 90 A Zero Off Mode Current
2、Fixed Output 1 2V 1 5V 1 8V 2 5V 3 0V 3 1V 3 3V 5 0V 5 Pin SOT 23 8 Pin nSOIC and 8 pin 2X3 DFN Packages The SPX3819 is a positive voltage regulator with a low dropout voltage and low noise output In addition this device offers a very low ground current of 800 A at 100mA output The SPX3819 has an in
3、itial tolerance of less than 1 max and a logic compatible ON OFF switched input When disabled power consumption drop to nearly zero Other key features include reverse battery protection current limit and thermal shutdown The SPX3819 includes a reference bypass pin for optimal low noise output perfor
4、mance With its very low output temperature coefficient this device also makes a superior low power voltage reference The SPX3819 is an excellent choice for use in battery powered applications such as cordless telephones radio control systems and portable computers It is available in several fixed vo
5、ltages 1 2V 1 5V 1 8V 2 5V 3 0V 3 1V 3 3V 5 0V or with an adjustable output This device is offered in 8 pin nSOIC 8 pin DFN and 5 pin SOT 23 packages APPLICATIONS Battery Powered Systems Cordless Phones Radio Control Systems Portable Palm Top Notebook Computers Portable Consumer Equipment Portable I
6、nstrumentation Bar Code Scanners SMPS Post Regulators TYPICAL APPLICATION CIRCUIT GND EN BYP Opt ENABLE may be tied directly to VIN SPX3819 1 2 3 4 5VINVOUT TOP View SPX3819 SPX3819 8 Pin DFN EN NC NC NCVIN ADJ BYP VOUT GND 5 6 7 8 1 2 3 4 Now Available in Lead Free Packaging 2 Date 6 8 2004SPX3819
7、500mA Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation Power Dissipation Internally Limited Lead Temp Soldering 5 Seconds 260 C Operating Junction Temperature Range 40 C to 125 C Input Supply Voltage 20V to 20V Enable Input Voltage 20V to 20V PARAMETERMINTYPMAXUNITS CONDITIONS Output
8、 Voltage Tolerance 1 1 2 2 Output Voltage Temperature Coef 57ppm C Line Regulation0 040 1 VVIN VOUT 1V to 16V Load Regulation0 050 4 IL 0 1mA to 500mA Dropout Voltage1060mVIL 100 A VIN VO Note 2 80 125175mVIL 50mA 250 180350mVIL 150mA 450 340550mVIL 500mA 700 Quiescent Current IGND 0 053 AVENABLE 0
9、4V 8 VENABLE 0 25V Ground Pin Current IGND 90150 AIL 100 A 190 250650 AIL 50mA 900 1 02 0mAIL 150mA 2 5 6 525 0mAIL 500mA 30 0 Ripple Rejection PSRR 70dB Current Limit ILIMIT 800mAVOUT 0V 950 Output Noise eNO 300 VRMSIL 10mA CL 1 0 F CIN 1 F 10Hz 100kHz 40 VRMSIL 10mA CL 10 F CBYP 1 F CIN 1 F 10Hz 1
10、00kHz Input Voltage Level Logic Low VIL 0 4VOFF Input Voltage Level Logic High VIH 2VON ENABLE Input Current0 012 AVIL 0 4V 320VIH 2 0V Thermal Resistance Note 1 220 C W SOT 23 5 Junction to Ambient 180 C W SO 8 Junction to Ambient ELECTRICAL CHARACTERISTICS TJ 25 C VOUT 1V for 1 2V Option VIN VOUT
11、1 2V IL 100 A CL 1 F and VENABLE 2 4V The denotes the specifications which apply over full operating temperature range 40 C to 85 C unless otherwise specified ABSOLUTE MAXIMUM RATINGS NOTES Note 1 The maximum allowable power dissipation is a function of maximum operating junction temperature TJ max
12、the junction to ambient thermal resistance and the ambient JA and the ambient temperature TA The maximum allowable power dissipation at any ambient temperature is given PD max TJ max TA JA exceeding the maximum allowable power limit will result in excessive die temperature thus the regulator will go
13、 into thermal shutdown The JA of the SPX3819 is 220 C W mounted on a PC board Note 2 Not applicable to output voltage 2V or less Input Voltage 2 5V to 16V Operating Junction Temperature Range 40 C to 125 C Enable Input Voltage 0V to VIN RECOMMENDED OPERATIONG CONDITIONS 3 Date 6 8 2004SPX3819 500mA
14、Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS Ground Current vs Load Current Ground Current vs Input Voltage 7 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 0100200300400500 IL mA IGND mA 3 3V Device VIN 4 3V CL 1 0 F 160 150 140 130 120 110 100 90 80 70 60 468
15、10121416 VIN V IGND A 3 3V Device CL 1 0 F IL 100 A Ground Current vs Load Current in Dropout Output Voltage vs Input Voltage 14 0 12 0 10 0 8 0 6 0 4 0 2 0 0 0 0100200300400500 IL mA IGND mA 3 3V Device VIN 4 3V CL 1 0 F 3 350 3 345 3 340 3 335 3 330 3 325 3 320 3 315 3 310 3 305 3 300 3 295 3 290
16、46810121416 VIN V VOUT V 3 3V Device CL 1 0 F IL 100 A 4 Date 6 8 2004SPX3819 500mA Low Noise LDO Voltage Regulator Copyright 2004 Sipex Corporation Dropout Voltage vs Load Current Output Voltage vs Load Current Ground Current vs Temperature with 100 A Load Ground Current vs Temperature with 50mA Load 350 300 250 200 150 100 50 0 0100200300400500 IL mA Dropout mV 3 3V Device VIN 3 2V CL 1 0 F 3 316 3 314 3 312 3 310 3 308 3 306 3 304 3 302 3 300 0100200300400500 IL mA VOUT V 3 3V Device VIN 4 3V
