Bay Linear Linear Excellence LP2950/LP2951 100mA Low Dropout Voltage Regulator Description Features The Bay Linear LP2950 and LP2951 are low power voltage regulators. They are excellent choice for use in Battery Powered applications such notebooks computers. The LP2950 and LP2951 feature low quiescent current ( 75A Typ.) and low dropout of 40mV at light loads 380mV (typ.) at 100mA. With a tight initial tolerance of 0.5% typ., extremely good load and line regulation of 0.05% typ. And very low output temperature coefficient making the LP2950 and LP2951 useful as a low power reference. The Bay Linear LP2950 is available in fixed voltages of 3.0V, 3.3V, and 5.0V in a TO-92 package. The Bay Linear LP2951 comes in an 8SOIC package and has an adjustable output voltage from 1.24V to 29V programmed with a pair of external resistor. It also features pin-strap capability providing the fixed voltage of 3.0, 3.3V or 5V for convenience. The LP2951 has an error flag output feature used as power-on reset for warning of low output voltage due to falling battery voltages. Also, the logic compatible shutdown input enables the regulator to be switched ON and OFF. Pin Connection * * * * * * * * * * Guaranteed 100mA Output 5.0V, 3.3V and 3.0V Versions Very Low Quiescent Current Low Dropout Voltage Extremely Tight Load and Line Regulation Very Low Temperature Coefficient Needs only 1 F for Stability Error Flag warns of output dropout Logic-Controlled Electronic Shutdown Output programmable from 1.24V to 29V Applications * * * * * * Battery Powered Systems Portable instrumentation Notebooks Computers Potable Consumer Equipment Automotive electronics SMPS Post-Regulator Ordering Information TO-92 (Z) Vin Vout Package TO-92 8SOIC Grd Tolerance 0.5% 1% LP2950AZ-XX LP2950-BZ-XX LP2951AM-XX LP2951BM-XX "XX" Voltage Selection Guide 8SOIC (M) Output 1 8 Input Sense 2 7 Feedback 3 6 -XX V tap 4 5 Error Shutdown Ground Bay Linear, Inc Vout 5.0V 3.3V 3.0V Adjustable XX Code 5 3.3 3 Left Blank 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com LP2950/LP2951 Absolute Maximum Rating Parameter Power Dissipation Lead Temperature ( Soldering 5 seconds ) Storage Temperature Range Operating Junction Temperature Input Supply Voltage Feedback Input Voltage Shutdown Input Voltage Error Comparator Output Internally Limited 260 C -65 C to +150 C -55 C to +150 C -0.3V to +30V -1.5V to +30V -0.3V to +30V -0.3V to +30V Electrical Characteristics (VS = 15V, TA = 25C , unless otherwise specified) Parameter Conditions Output Voltage Output Voltage Output Voltage Temperature Coefficient Line Regulation (Note 3) Load Regulation (Note 5) Dropout Voltage Ground Current Dropout Ground Current Current Limit Thermal Regulation Output Noise, 10Hz to 100KHz MIN TYP MAX UNIT -25 C Tj 85 C Full Operating Temperature 0.985 [ Vo ] Vo 1.015 [ Vo ] V 100A IL 100mA, Tj T jmax (Note 1) 0.976 [Vo ] 0.98 [ Vo ] VO + 1V VIN 30V (Note 4) 100A IL 100mA IL = 100A IL = 100mA IL = 100A IL = 100mA VIN = VO - 0.5V, IL = 100A VOUT = 0 CL = 1F CL = 200F CL = 3.3F (Bypass = 0.01 F pins 7 to 1 for LP2951-XX) 1.02 [ Vo ] Vo 50 1.024 [ Vo ] 150 0.04 0.1 50 380 75 8 110 160 0.05 430 160 100 0.4 0.3 80 450 120 12 170 200 0.2 1.235 1.26 1.285 40 V ppm / C % % mV A mA A mA %/W Vrms 8 pin Versions only (LP2951) Reference Voltage Over temperature Feedback Pin Bias Current Reference Voltage Temperature Coefficient Feedback Pin Bias Current Temperature Coefficient Error Comparator Output Leakage Current Output Low Voltage Upper Threshold Voltage Lower Threshold Voltage Hysteresis Bay Linear, Inc 1.21 1.185 20 50 (Note 7) VOH = 30V VIN 4.5V, IOL = 400A (Note 8) (Note 8) (Note 8) 40 V A ppm/C 0.1 100 A/C 0.01 150 60 75 15 1.0 250 A mV mV mV mV 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 95 www.baylinear.com LP2950/LP2951 Parameter Conditions Shutdown Input Input Logic Voltage MIN Low (Regulator ON) High (Regulator OFF) VS = 5V VS =30V (Note 9) VOUT = 5.0V 3.3V VOUT 5.0V 2.0V VOUT 3.3V Shutdown Pin Input Current Regulator Output Current in Shutdown TYP MAX UNIT 1.3 0.7 V 30 450 50 600 A 3 10 20 30 2 A Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range. Note 2: Unless otherwise specified all limits guaranteed for TJ = 25C, VIN = VO +1V, IL = 100A and CL = 1F. Additional conditions for the 8pin versions are feedback tied to -XX Voltage tap and output tied to output Sense pin ( VOUT = XX V) and VSHUTDOWN 0.8V Note 3: Regulation is measured at constant junction temperature , using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under specification for thermal regulation. Note 4: Line regulation for LP2951-XX is tested at 150C for IL = 1mA. For IL = 100A and TJ = 125C, line regulation is guaranteed by design to 0.2%. See typical performance characteristics for line regulation versus temperature and load current. Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential. At very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be taken into account. Note 6: VREF VOUT (VIN -1V), 2.3V VIN 30V, 100A IL 100mA, TJ TJMAX Note 7: Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range Note 8: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage measured at VO + 1V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = VOUT / VREF = (R1 + R2)/R2. For example, at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95mV X 5V / 1.235V = 384mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed. Note 9: VSHUTDOWN 2V, VIN 30V, VOUT = 0, Feed-back pin tied to -XX Voltage Tap. Block Diagram UNREGULATED DC 7 + INPUT FEEDBACK 5V @ 150mA MAX 1 8 OUTPUT 2 SENSE + _ FROM CMOS OR TTL 3 180k .. 6 ERROR AMPLIFIER 330k .. 5V TAP SHUTDOWN 60k .. + 60 mV + _ + 1.23V 5 + 1 F.. ______ ERROR ERROR DETECTION COMPARATOR TO CMOS OR TTL 4 REFERENCE GROUND LP2950 and LP2951 Block Diagram Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com LP2950/LP2951 APPLICATION HINTS EXTERNAL CAPACITORS The stability of the LP2950/LP2951 requires a 1.0F or greater capacitor between output and ground. Oscillation could occur without this capacitor. Most types of tantalum or aluminum electrolytic works fine here. For operations below -25C solid tantalum is recommended since many aluminum types have electrolytes that freeze at about -30C. The ESR of about 5 or less and resonant frequency above 500kHz are the most important parameters in the value of the capacitor. The capacitor value can be increased without limit. At lower values of output current, less output capacitance is required for stability. For the currents below 10mA the value of the capacitor can be reduced to 0.5F and 0.15F for 1mA. More output capacitance is needed for the 8-pin version at voltages below 5V since it runs the error amplifier at lower gain. At worst case 5F or greater must be used for the condition of 150mA load at 1.23V output. The LP2950, unlike other low dropout regulators will remain stable in regulation with no load in addition to the internal voltage divider. This feature is especially important in applications like CMOS RAM keep-alive. When setting the output voltage of the LP2951 version with external resistors, a minimum load of 1uA is recommended. If there is more than 10 inches of wire between the input and the AC filter capacitor or if a battery is used as the input then a 1A tantalum or aluminum electrolytic capacitor should be placed from the input to the ground. Instability can occur if there is stray capacitance to the LP2951 feedback terminal (pin 7). This could cause more problems when using a higher value of external resistors to set the output voltage. This problem can be fixed by adding a 100pF capacitor between output and feedback and increasing the output capacitor to at least 3.3F. 4.75V OUTPUT VOLTAGE _______ ERROR* This is around 60mV offset divided by the 1.235 reference voltage. This trip level remains 5% below normal regardless of the programmed output voltage of the regulator. Figure 1 shows the timing diagram depicting the ERROR signal and the regulator. output voltage as the LP2951 input is ramped up and down. The ERROR signal becomes low at around 1.3V input, and goes high around 5V input (input voltage at which VOUT = 4.75 ). Since the LP2951's dropout voltage is load dependent, the input voltage trip point (around 5V) will vary with the load current. The output voltage trip point (approx. 4.75V) does not vary with load The error comparator has an open-collector output which requires an external pull-up resistor. Depending on the system requirements the resistor may be returned to 5V output or other supply voltage in determining the value of this resistor, note that the output is rated to sink 400A, this value adds to battery drain in a low battery condition. Suggested values range from 100K to 1M. If the output is unused this resistor is not required. PROGRAMMING THE OUTPUT VOLTAGE OF LP2951 The LP2951 may be pin-strapped for 5V using its internal voltage divider by tying Pin 1 (output) to Pin 2 (sense) and Pin 7 (feedback) to Pin 6 (5V Tap). Also it may be programmed for any output voltage between its 1.235V reference and its 30V maximum rating . As seen in Figure 2, an external pair of resistors is required. Refer to the below equation for the programming of the output voltage. VOUT = VREF x ( 1 + R1/R2 )+ IFBR1 The VREF is 1.235 and IFB is the feedback bias current, nominally -20 nA. The minimum recommended load current of 1A forces an upper limit of 1.2 M on value of R2. If no load presented the IFB produces an error of typically 2% in VOUT which may be eliminated at room temperature by trimming R1. To improve the accuracy choose the value of R2 = 100k this reduces the error by 0.17% and increases the resistor program current by 12A. Since the LP2951 typically draws 60A at no load with Pin 2 open-circuited this is a small price to pay. REDUCING OUTPUT NOISE +5.0V INPUT VOLTAGE +1.3V + + * See Application Info. _______ Figure 1. ERROR Output Timing ERROR DETECTION COMPARATOR OUTPUT The Comparator produces a logic low output whenever the LP2951 output falls out of regulation by more than around 5%. Bay Linear, Inc It may be an advantage to reduce the AC noise present at the output. One way is to reduce the regulator bandwidth by increasing the size of the output capacitor. This is the only way that noise can be reduced on the LP2950 but is relatively inefficient, as increasing the capacitor from 1F to 220 F only decreases the noise from 430V to 160VRMS. for a 100kHz bandwidth at 5V output. Noise could also be reduced fourfold by a bypass capacitor across R1, since it reduces the high frequency gain from 4 to unity. Pick CBYPASS 1 / 2R1 x 200 Hz or choose 0.01F. When doing this, the output capacitor must be increased to 3.3F to maintain stability. These changes reduce the output noise from 430V to 100VRMS. for a 100kHz bandwidth at 5V output. With the bypass capacitor added, noise no longer scales with output voltage so that improvements are more dramatic at higher output voltages. 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com LP2950/LP2951 TYPICAL PERFORMANCE CHARACTERISTICS INPUT CURRENT DROPOUT CHARACTERISTICS QUIESCENT CURRENT 10 250 6 RL =50k 3 RL=50k 2 RL = 50k 175 150 125 100 RL = 8 4 GROUND PIN CURRENT (mA) 200 INPUT CURRENT (A) OUTPUT VOLTAGE (VOLTS) 225 5 75 50 1 0.1 25 0 0 0 1 2 3 4 5 0 6 1 OUTPUT VOLTAGE VS. TEMP OF 3 REPRESENTATIVE UNITS 5.06 2 10 3 0.01 0.1 150 GROUND CURRENT 240 INPUT CURRENT (mA) GROUND CURRENT (A) 4.98 IL = 1mA 200 160 IL = 0 120 80 0.2% 4.96 40 4.94 0 -75 -50 -25 0 25 50 75 100 125 150 0 1 2 3 4 5 6 7 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 8 RL=50 0 1 INPUT VOLTAGE (VOLTS) GROUND CURRENT GROUND CURRENT 2 3 4 5 6 7 8 9 10 INPUT VOLTAGE (VOLTS) TEMPERATURE (C) QUIESCENT CURRENT 240 16 16 150 INPUT CURRENT 320 280 5.0 10 LOAD CURRENT (mA) 5.04 5.02 1 INPUT VOLTAGE (VOLTS) INPUT VOLTAGE (VOLTS) OUTPUT VOLTAGE (V) 1 VIN = 6V IL = 100mA 8 QUIESCENT CURRENT (A) 12 GROUND CURRENT GROUND CURRENT (mA) 14 12 IL =100mA 10 8 6 4 200 0 4 -75 -50 -25 0 0 25 50 75 100 125 150 TEMPERATURE (C) 1 2 3 4 5 6 7 -75 -50 -25 8 170 500 DROP-OUT VOLTAGE (mV) 400 400 300 ~ ~ 100 IL = 100A 300 200 TJ = 25C 100 SHORT CIRCUIT CURRENT (mA) IL = 100mA 500 25 50 75 100 125 150 SHORT CIRCUIT CURRENT DROP-OUT VOLTAGE DROP-OUT VOLTAGE 0 TEMPERATURE (C) INPUT VOLTAGE 600 DROP-OUT VOLTAGE (mV) VIN =6V IL =100mA 180 2 50 220 160 150 140 130 120 110 110 0 94550 1mA Tel: (925)10mA 989-7144, Fax: (925) 940-9556 Bay Linear, Inc 2478 Armstrong Street, Livermore, 0CA100A -75 -50 100mA -75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C) OUTPUT CURRENT -25 0 www.baylinear.com 25 50 75 100 125 150 TEMPERATURE (C) LP2950/LP2951 TYPICAL PERFORMANCE CHARACTERISTICS (continued) LP2951 COMPARATOR SINK CURRENT ERROR COMPARATOR OUTPUT 100 mV 4 HYSTERESIS 2 0 1.5 TA = 25C 1.0 TA = -55C 0.5 PULLUP RESISTOR TO SEPARATE 5V SUPPLY -2 1 0 2 3 0.0 4 0 CL = 1F IL = 1mA VOUT = 5V -50 mV ~ ~ 8V 4V 0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 5 200 OUTPUT LOW VOLTAGE (V) 600 400 800 TIME(s) RIPPLE REJECTION OUTPUT IMPEDANCE 10 RIPPLE REJECTION 90 90 80 80 IO = 1mA 2 IO = 100mA 1 0.5 VOUT = 5V CL = 1F 0.2 0.1 0.05 70 IL = 0 60 50 40 IL = 100A CL = 1F VIN = 6V VOUT = 5V 30 0.02 RIPPLE REJECTION (dB) IO = 100A 5 RIPPLE REJECTION (dB) 0.01 10 100 1K 10K 100K 1M 70 60 50 40 IL = 10mA 20 101 102 FREQUENCY (Hz) 103 104 105 101 106 102 20 FEEDBACK CURRENT (A) BIAS CURRENT (nA) 0.1 106 50 10 1 105 LP2951 FEEDBACK PIN CURRENT LP2951 FEEDBACK BIAS CURRENT LP2951 MINIMUM OPERATING VOLTAGE 104 103 FREQUENCY (Hz) FREQUENCY (Hz) 10 CL= 1F VIN = 6V VOUT = 5V IL = 10mA 30 20 0 -10 -20 PIN 7 DRIVEN BY EXTERNAL SOURCE (REGULATOR RUN OPEN LOOP) 0 -50 TA =1 25C -100 -150 TA = 25C -200 TA = 55C 0.01 -75 -50 -25 0 25 50 75 100 125 150 25 50 75 100 125 150 200 60 150 40 LOAD OUTPUT VOLTAGE CURRENT CHANGE (mV) 80 100 50 0 -50 CL = 1F VOUT = 5V 100 mA 2 3 TIME (ms) Bay Linear, Inc 4 5 0 0.5 1.0 ENABLE TRANSIENT 20 0 -20 CL = 1F VOUT = 5V -40 -60 ~ ~ 100 A 1 -0.5 7 100 A -1.5 -1.0 FEEDBACK VOLTAGE (V) A 100 0 -2.0 LOAD TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE 250 ~ ~ 0 TEMPEATURE (C) TEMPERATURE -100 -250 -30 -75 -50 -25 SHUTDOWN OUTPUT PINOUT VOLTAGE (V) VOLTAGE (V) OUTPUT IMPEDANCE (OHMS) 50 mV 6V INPUT VOLTAGE (V) MINIMUM OPERATING VOLTAGE (V) INPUT OUTPUT VOLTAGE VOLTAGE CHANGE TA = 125C 2.0 6 SINK CURRENT (mA) COMPARATOR OUTPUT (V) VOUT = 5V LOAD OUTPUT VOLTAGE CURRENT CHANGE (mV) LINE TRANSIENT RESPONSE 2.5 8 6 5 4 3 2 IL = 10mA VIN = 8V CL = 10F VOUT = 5V 1 0 2 0 -2 0 4 8 12 16 20 -100 0 100 200 300 400 500 600 700 TIME (ms) 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 TIME www.baylinear.com LP2950/LP2951 TYPICAL PERFORMANCE CHARACTERISTICS (continued) LP2950 MAXIUM RATED OUTPUT PIN 2 TO PIN 4 RESISTANCE (k 0.25" LEADS SOLDERED TO PC BOARD 100 80 TJMAX = 125 C 60 40 TA=25 C TA = 85 C 20 300 200 100 60 40 20 15 25 -75 -50 -25 30 INPUT VOLTAGE (V) SHUTDOWN THRESHOLD VOLTAGE 25 0 50 1.6 4 POWER OUTPUT VOLTAGE DISSIPATION (W) CHANGE (mV) 5 1.4 1.2 1.0 0.8 20 25 30 OUTPUT NOISE IL = 100mA 3.0 0 -2 ~ ~ 1 1.25W CL = 1F 2.5 CL = 220F 2.0 1.5 CL = 3.3F 1.0 0.5 0 0.0 0 10 TEMPERATURE (C) 20 30 40 102 50 TIME (s) 103 104 105 FREQUENCY (Hz) LINE REGULATION RIPPLE REJECTION 80 30 IL = 50A 25 20 70 IL = 100A 15 RIPPLE REJECTION (dB) OUTPUT VOLTAGE CHANGE (mV) 15 3.5 2 75 100 125 150 10 INPUT VOLTAGE (V) -1 0.6 25 50 5 0 75 100 125 150 THERMAL RESPONSE 1.8 -75 -50 -25 0 TA = 85C TEMPERATURE (C) VOLTAGE NOISE SPECTRAL DENSITY (V/Hz) 10 TA = 50C 0 0 5 TJMAX = 125 C VOUT = 5V TA = 25C 80 20 0 0 8-PIN MOLDED DIP SOLDERED TO PC BOARD 100 OUTPUT CURRENT (mA) TO-92 PACKAGE OUTPUT CURRENT (mA) 120 ) 120 SHUTDOWN THRESHOLD VOLTAGE (V) LP2950 MAXIUM RATED OUTPUT CURRENT LP2951 DIVIDER RESISTANCE 400 TJ = 150 C 10 5 IL = 1mA 0 ~ ~ 10 5 TJ = 125 C IL = 100A 60 IL = 100mA 50 40 CL = 1F 30 VIN = 6V VOUT = 5V 20 0 -5 10 -10 5 10 15 20 INPUT VOLTAGE (V) Bay Linear, Inc 25 30 101 102 103 104 105 106 FREQUENCY (Hz) 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com LP2950/LP2951 TYPICAL APPLICATIONS (continued) + 6V SEALED 120K .. LEADACID BATTERY SOURCE FB 1.5K .. 8 1N457 +VIN LM385 FOR 5.5 V VOUT BAY LP2951 400K .. 1 MEMORY V+ SENSE 2 3 + 1uF SD 100K .. MAIN V- GND 4 20K .. NI-CAD BACKUP BATTERY Low Battery Disconnect 8 39k .. 2 SENSE +VIN 5 ______ ERROR 1 - +VOUT = 5V VOUT RESET + BAY LP2951 3 SD C4 + 1uF 7 FB 39k .. 1% GND 4 TAP 6 100k .. 100k .. C1 + 6V LEADACID BATTERY 1k .. <5.8V** 1% 100k .. C2 + <6.0V** 1% 1k .. 100k .. C3 + <6.2V** 10k .. R3 1% 20k .. * OPTIONAL LATCH OFF WHEN DROPOUT OCCURS. ADJUST R3 FOR C2 SWITCHING WHEN VIN IS 6.0V ** OUTPUTS GO LOW WHEN VIN DROPS BELOW DESGNATED THRESHHOLDS Regulatorwith State-of-Charge indicator Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com LP2950/LP2951 TYPICAL APPLICATIONS (continued) +VIN 8 3 AUX SHUTDOW INPUT 10K .. +VIN _______ 5 ERROR SD OFF 5 DEGREE SHUTDOWN FLAG BAY ON LP2951 4 + 1 FB GND TEMP SENSOR VOUT 7 LM35 EXTERNAL CIRCUIT PROTECTED FROM OVER TEMPERATURE (V+ GOES OFF WHEN TEMP > 125) OR RELAY 8.2K .. - System Over Temperature Protection Circuit +5V 4 4.7mA 20mA 8 OUTPUT UNREGULATED INPUT +VIN 1 VOUT 1N4001 0.1uF 5 IN BAY LINEAR LP2951 1 BAY LINEAR 7 FB 2 GND 360K 27K .. .. 1N457 Open Circuit Detector for 4mA to 20mA Current Loop 5V 2 VTAP FB 7 SENSE GND 4 MIN VOLTAGE = 4V Bay Linear, Inc 2N5432 LP2951 3 4 330K .. VOUT OUTPUT + 4.7uF LOAD 50mA TO 300 mA 300 mA Regulator with 0.75 Dropout 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com LP2950/LP2951 SCHEMATIC DIAGRAM Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com LP2950/LP2951 Package Drawing SO-8 (M) 4.0 (0.158) 3.8 (0.150) 5.2 (0.205) 4.6 (0.181) 6.2 (0.244) 5.8 (0.228) Pin 1 1.27 (0.50) BSC 1.75 (0.069) 1.35 (0.053) 0.78 (0.031) 0.61 (0.024) 5.0 (0.197) 4.8 (0.188) 45 0.37 (0.015) BSC 0.77 (0.030) 0.64 (0.025) 7 (4 PLCS) 3-6 0.56 (0.022) 0.49 (0.019) 0.45 (0.018) 0.35 (0.014) Bay Linear, Inc 0.20 (0.008) 0.10 (0.004) 0.22 (0.009) 0.19 (0.007) 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 7 (4 PLCS) www.baylinear.com LP2950/LP2951 PACKAGE DRAWING TO-92(Z) 0.090 (2.286) Radius typ. 2 1 3 0.145 (3.683) 0.135 (3.429) 0.055 (1.397) 0.045 (1.143) 10 typ. BOTTOM VIEW 0.185 (4.699) 0.045 (1.143) 0.085 (2.159) Diameter 5 typ. 0.185 (4.699) 0.175 (4.445) 0.090 (2.286) typ. 5 typ. Seating Plane 0.025 (0.635) Max Uncontrolled Lead Diameter 0.500 (12.70) Min. 0.016 (0.406) 0.014 (0.356) 0.0155 (0.3937) 0.0145 (0.3683) 0.055 (1.397) 0.045 (1.143) 0.105 (2.667) 0.095 (2.413) Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations, computer simulations and/ or initial prototype evaluation. Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges. The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit design or permit any industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any industrial property right resulting from the use of the contents shown in the data book. Typical parameters can and do vary in different applications. Customer's technical experts must validate all operating parameters including " Typical" for each customer application. LIFE SUPPORT AND NUCLEAR POLICY Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without the specific written consent of Bay Linear President. Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com