100mA LOW DROPOUT VOLTAGE REGULATORS LM2950/1 FEATURES TO- 92 PKG ● High accuracy output voltage SOP- 8 PKG ● Guaranteed 100 mA output ● Very low quiescent current ● Extremely tight load and line regulation ● Very low temperature coefficient 1 2 ● Current and thermal limiting 3 ● Low dropout voltage ● Need only 1uF for stability ● Error flag warns of output dropout Pin 1 : Output ● Logi-control electronic shutdown Pin 2 : Ground ● Output programmable from 1.24 to 29V Pin 3 : Input Pin : 1. Output 2. Sense 3. Shutdown 4. Ground 5. Error 6. Tap 7. Feedback 8. Input ● Moisture Sensitivity Level 3 Applications ORDERING INFORMATION DEVICE PKG ● High-efficiency linear regulator, voltage reference ● Battery powered systems ● Portable consumer equipment ● Portable / Parm, Desktop / Notebook computers ● Portable Instrumentation, cordless telephones ● Automotive Electronics, Radio control systems ● SMPS Post-Regulator, Avionics LM2950-XX TO-92 LM2951D-XX SOP-8 (XX= 1.5, 1.8, 2.8, 2.85, 3.0, 3.3, 5.0V, Adjustable) DESCRIPTION The LM2950/1 is a low power voltage regulator. This device excellent choice for use in battery powered application such as cordless telephone, radio control systems, and portable computers. The LM2950/1 features very low quiescent current (75㎂ Typ.) and very low drop output voltage (Typ. 400㎷ at light load and 380㎷ at 100㎃). This includes 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 LM2950/1 useful as a low-power voltage reference. The error flag output feature is used as power-on reset for warn of a low output voltage, due to following batteries on input. Other feature is the logic-compatible shutdown input which enable the regulator to be switched on and off. The LM2950/1 is available in 8-pin plastic packages. The regulator output voltage may be pin-strapped for a -XX volt or programmed from 1.24 volt to 29 volts with external pair of resistors. The LM2950/1 is offered in 3-pin to-92 package compatible with other fixed regulator. HTC Feb 2009 - Rev. 1.2 −1− 100mA LOW DROPOUT VOLTAGE REGULATORS LM2950/1 BLOCK DIAGRAM AND TYPICAL APPLICATIONS (LM2950) UNREGULATED DC + INPUT VOUT OUTPUT + - + 100㎃ MAX + ERROR AMPLIFIER 1㎌ 1.23V REFERENCE 60KΩ GROUND BLOCK DIAGRAM AND TYPICAL APPLICATIONS (LM2951) ABSOLUTE MAXIMUM RATINGS INTERNALLY LIMITED POWER DISSIPATION 260℃ Lead Temperature (Soldering, 5 seconds) Storage Temperature Range -65℃ to +150℃ Operating Junction Temperature Range -55℃ to +150℃ Input Supply Voltage -0.3 to +30V Feedback Input Voltage -1.5 to +30V Shutdown Input Voltage -0.3 to +30V Error Comparator Output -0.3 to +30V HTC Feb 2009 - Rev. 1.2 −2− 100mA LOW DROPOUT VOLTAGE REGULATORS LM2950/1 ELECTRICAL CHARACTERISTICS (at Ta=25℃, VIN=15V, unles otherwise specified) PARAMETER CONDITIONS (Note 2) MIN -25℃ ≤TJ ≤85℃ 0.985｜V0｜ Full Operating Temperature 0.980｜V0｜ Output Voltage 100㎂≤IL≤100㎃,TJ≤TJMAX 0.976｜V0｜ Output Voltage Temperature Coefficient (Note 1) Line Regulation (Note 3) Load Regulation (Note 3) Output Voltage Dropout Voltage (Note 4) TYP V0 V0 MAX UNITS 1.015｜V0｜ 1.020｜V0｜ V 1.024｜V0｜ 50 150 ppm/℃ V0+1V≤VIN≤30V 0.04 0.4 % 100㎂≤IL≤100㎃ 0.1 0.3 % IL=100㎂ 50 80 IL=100㎃ 380 450 ㎷ ELECTRICAL CHARACTERISTICS (at Ta=25℃, VIN=15V, unles otherwise specified) PARAMETER Ground Current CONDITIONS (Note 2) MIN TYP MAX UNITS IL=100㎂ 75 120 ㎂ IL=100㎃ 8 12 ㎃ Dropout Ground Current VIN=V0-0.5V, IL=100㎂ 110 170 ㎂ Current Limit VOUT=0 160 250 ㎃ 0.05 0.2 %/W Thermal Regulation Output Noise, 10Hz to 100kHz CL=1㎌ 430 CL=200㎌ 160 CL=3.3㎌ 100 μVr㎳ (Bypass=0.01㎌ pins 7 to 1 Error Comparator Output Leakage Current VOH=30V 0.01 1.0 Output Low Voltage VIN=4.5V, IOL=400㎂ 150 250 Upper Threshold Voltage (Note 6) Lower Threshold Voltage (Note 6) 75 Hysteresis (Note 6) 15 Low (Regulator ON) 1.3 40 ㎂ 60 15 ㎷ Shutdown Input Input Logic Voltage High (Regulator OFF) Shutdown Pin Input Current 0.7 V 2 VS=2.4V 30 50 VS=30V 450 600 3 10 (Note 7) Regulator Output Current Shutdown VOUT=5.0V 3.3V≤VOUT＜5.0V 20 2.0V≤VOUT＜3.3V 30 ㎂ HTC Feb 2009 - Rev. 1.2 −3− 100mA LOW DROPOUT VOLTAGE REGULATORS LM2950/1 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 = 25℃, VIN = V0+1V, IL = 100㎂ and CL = 1㎌. Additional condition for the 8-pin versions are feedback tied to -XX V tap and output tied to output Sense (V OUT=XX V) and VSHOUTDOWN≤0.8V Note 3 : Regulations 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 the specification for thermal regulation. Note 4 : Dropout voltage is defined as the input to output differential at which the output voltage drops 100㎷ below its nominal value measured at 1V differential. At very low values of programmed output voltage, the minimum input supply voltage(2.3V over temperature) must be taken into account. Note 5 : VREF≤VOUT≤(VIN-1V), 2.3V≤VIN≤30V, 100㎂≤IL≤100㎃, TJ≤TJMAX Note 6 : Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage measured at VOUT+1V input. To express these thresholds in terms of output voltage changed, 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 95㎷ x 5V / 1.235V = 384 ㎷. Thresholds remain constant as a percent VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed. Note 7 : VSHUTDOWN≥2V, VIN≤30V, VOUT=0, Feed-back pin tied to -XX V Tap. HTC Feb 2009 - Rev. 1.2 −4−