LP2951

Solved by LP2950/LP2951 TM 100mA Low Dropout Voltage Regulators •        •     •       •       •     •     •    µ   •   Lead Free, RoHS Compliant Packages:      •         •   •  •   •   •   •  • •  •  •   •       •    •       Now Available in Lead Free Packaging                                                                                                                                                           UNREGULATED DC + 7 FEEDBACK 8 INPUT  OUTPUT 5V @ 00mA MAX 2 SENSE FROM CMOS OR TTL  SHUTDOWN 0 mV + _ 80kΩ ERROR AMPLIFIER  5V TAP 0kΩ + 5 0kΩ + + .2V + _ ERROR DETECTION COMPARATOR ______ ERROR µF . TO CMOS OR TTL .  REFERENCE GROUND Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation                                                                                ≤ ≤     µ ≤ ≤   ≤     ≤ ≤     µ ≤ ≤   ≤                                                                                                          ≤ ≤    µ ≤ ≤     µ        µ         µ    µ    µ                                                         µ    µ  µ  µ                                    Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation 2 LP2950/51 PARAMETER CONDITIONS (Note 2) 8-Pin Versions only (Continued) 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 Shutdown Input Input logic Voltage Shut down Pin Input Current Regulator Output Current in Shutdown Thermal Resistance θJA Low (Regulator ON) High (Regulator OFF) VS= 2.4V VS= 30V (Note 8) 8 Pin SOIC 3 Pin TO-92 2.0 1.3 30 675 3 128. 4 131.9 LP2951AC Min. Typ. Max. 20 0.1 Min. LP2951C Typ. Max. UNITS 50 0.1 ppm/°C nA/°C VOH = 30V VIN= 4.5V IOL= 400 μA (Note 7) (Note 7) (Note 7) 40 0.01 150 60 75 15 1 250 40 95 0.01 150 60 75 15 1 250 μA mV mV 95 mV mV 0.7 50 800 10 2.0 1.3 30 675 3 0.7 50 800 10 V V μA μA μA °C/W °C/W 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 T J = 25°C, VIN= 6V, I L= 100 μA and CL = 1μF. Additional conditions for the 8-pin versions are feedback tied to 5V tap and output tied to output sense (VOUT= 5V) and V SHUTDOWN ≤0.8V. Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes i n output voltage due to heating effects are covered under the specification for thermal regulation. Note 4: Line regulation for the LP2951 is tested at IL= 1mA. For I L= 100 μA and TJ = 125°C, 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 100 mV 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: V REF ≤V OUT ≤(V IN- 1V), 2.3 ≤VIN≤30V, 100μA≤IL≤100mA, T J ≤T JMAX. Note 7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nomi nal reference voltage measured at 6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = V OUT/VREF= (R 1+ R 2)/R2. For example, at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95 mV x 5V/1.235 = 384 mV. Thresholds remain constant as a percent of V OUTas V OUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed. Note 8: VSHUTDOWN ≥2V, V IN ≤30V, V OUT=0, Feedback pin tied to 5V Tap. Note 9: All typical values are not guaranteed. The value could vary from lot to lot. Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation       6 5 OUTPUT VOLTAGE (VOLTS) INPUT CURRENT (µA) 250 225 175 150 125 100 75 50 25 0 0 1 2 3 4 5 6 0 1 2 3 4 5 67 8 9 10 INPUT VOLTAGE (VOLTS) INPUT VOLTAGE (VOLTS) RL = 8 GROUND PIN CURRENT (mA) 10 200 4 R L= R L = 50k Ω 1 3 R L =50kΩ 2 1 0 8 0.1 0.01 0.1 1 10 100 LOAD CURRENT (mA) Dropout Characteristics Input Current Quiescent Current 16 320 280 GROUND CURRENT (µA) INPUT CURRENT (mA) GROUND CURRENT (mA) 240 200 160 120 80 40 0 0 1 2 3 4 5 6 7 8 I L = 1mA IL= 0 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 0 1 2 3 4 5 6 R L =50 Ω VOUT = 5V 12 V IN = 6V I L = 100mA 8 4 7 8 9 10 -75 -50 -25 0 25 50 75 100 125 150 INPUT VOLTAGE (VOLTS) TEMPERATURE (ºC) INPUT VOLTAGE (VOLTS) Ground Current 16 14 Input Current 190 Ground Current QUIESCENT CURRENT (µA) GROUND CURRENT (mA) 12 I L =100mA 170 V IN =6V I L =100uA 10 8 6 4 2 0 0 1 2 3 4 5 6 7 8 INPUT VOLTAGE 150 130 -75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (ºC) Ground Current Quiescent Current Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation       600 I L = 100mA SHORT CIRCUIT CURRENT (mA) 500 400 DROP-OUT VOLTAGE (mV) 170 160 150 140 130 120 110 110 -75 -50 -25 500 DROP-OUT VOLTAGE (mV) 400 300 100 50 0 -75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (ºC) 300 ~ ~ 200 TJ = 25ºC I L = 100 µA 100 0 100µA 1mA 10mA 100mA 0 25 50 75 100 125 150 OUTPUT CURRENT TEMPERATURE (ºC) Drop-Out Voltage 8 V OUT = 5V Drop-Out Voltage 2.5 2.0 SINK CURRENT (mA) Short Circuit Current 100 mV T A = 125ºC INPUT OUTPUT VOLTAGE VOLTAGE CHANGE 6 COMPARATOR OUTPUT (V) 50 mV 0 -50 mV ~ ~ 8V 6V 4V 0 200 400 TIME(µs) C L = 1 µF I L = 1mA V OUT = 5V 4 HYSTERESIS 1.5 1.0 0.5 T A = 25ºC 2 0 -2 0 1 PULLUP RESISTOR TO SEPARATE 5V SUPPLY T A = -55ºC 2 3 4 5 0.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 OUTPUT LOW VOLTAGE (V) INPUT VOLTAGE (V) 600 800 Error Comparator Output 10 OUTPUT IMPEDANCE (OHMS) LP2951 Comparator Sink Current 90 80 RIPPLE REJECTION (dB) Line Transient Response 90 80 C L = 1µF V IN = 6V V OUT = 5V 5 2 1 0.5 0.2 0.1 0.05 0.02 0.01 10 IO = 100 µA I O = 1mA I O = 100mA IL= 0 60 50 40 30 20 C L = 1 µF V IN = 6V V OUT = 5V I L = 100 µA RIPPLE REJECTION (dB) 70 70 60 50 40 30 20 I L = 1mA V OUT = 5V C L = 1 µF I L = 10mA 100 1K 10K 100K 1M 10 1 10 2 10 3 10 4 10 5 10 6 10 1 10 2 10 3 10 4 10 5 10 6 FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) Output Impedance Ripple Rejection Ripple Rejection Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation 5      2.3 20 10 BIAS CURRENT (nA) 50 0 FEEDBACK CURRENT (µA) PIN 7 DRIVEN BY EXTERNAL SOURCE (REGULATOR RUN OPEN LOOP) MINIMUM OPERATING VOLTAGE (V) 2.1 0 -10 -20 -30 -50 -100 -150 -200 -250 TA=1 25ºC T A = 25ºC T A = 55ºC 1.9 1.7 -75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE -75 -50 -25 0 25 50 75 100 125 150 TEMPEATURE (ºC) -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 FEEDBACK VOLTAGE (V) LP2951 Minimum Operating Voltage LP2951 Feedback Bias Current LP2951 Feedback Pin Current 250 200 150 LOAD OUTPUT VOLTAGE CURRENT CHANGE (mV) 80 60 SHUTDOWN OUTPUT PINOUT VOLTAGE (V) VOLTAGE (V) 7 6 5 4 3 2 1 0 2 0 -2 0 4 TIME (ms) C L= 1 µF 40 LOAD OUTPUT VOLTAGE CURRENT CHANGE (mV) 100 50 0 -50 -100 100 µA mA ~ ~ C L = 1 µF V OUT = 5V 20 0 -20 -40 -60 ~ ~ C L = 10 µF V OUT = 5V C L= 10 µF I L = 10mA V IN = 8V V OUT = 5V 100 100 0 1 2 TIME (ms) 100 3 4 5 µA µA 8 12 16 20 -100 0 100 200 300 400 500 600 700 TIME (us) Load Transient Response 120 100 OUTPUT CURRENT (mA) Load Transient Response 400 Enable Transient 120 100 OUTPUT CURRENT (mA) PIN 2 TO PIN 4 RESISTANCE (kΩ) TO-92 PACKAGE 0.25" LEADS SOLDERED TO PC BOARD Vout=5V T JMAX = 125 ºC 8-PIN MOLDED DIP SOLDERED TO PC BOARD T JMAX = 125º C V OUT = 5V 300 80 60 40 20 0 0 5 10 15 T A = 85 ºC 80 60 40 20 T A = 50ºC T A = 85ºC 200 T A = 25ºC T A =25 ºC 100 0 20 25 30 INPUT VOLTAGE (V) 0 TEMPERATURE (ºC) -75 -50 -25 0 25 50 75 100 125 150 0 5 INPUT VOLTAGE (V) 10 15 20 25 30 LP2950 Maxium Rated Output Mar8-07 Rev E LP2951 Divider Resistance LP2950-5 Low Dropout Linear Regulator LP2950 Maxium Rated Output Current © 2007 Sipex Corporation                   µ        µ         µ                               µ    µ                 µ                               µ     µ                                          µ                     µ                        Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation 7             µ                            °                °     Ω                                                        µ   µ                              µ                                                                 µ                               µ                                                                       µ                                                                                                                                                µ                  Ω                                                                                             ×                        µ      Ω                                                     µ      µ                                                                        µ   µ      µ  µ                                      ≅   π ×    µ           µ           µ  µ                                                                             Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation 8    +V IN 100K ERROR OUTPUT 5 ______ 8 +V IN V OUT 1 ERROR 1.24 to 2 9V LP2951 SHUTDOWN INPUT 3 SD GND 4 R1 FB 7 + .01µF 3.3µF 1.23V V REF R2     +V IN 470kΩ 5 ______ 8 +V IN 470kΩ ERROR +V IN V OUT 1 V OUT ERROR OUTPUT 5 ______ 8 +V IN V OUT 1 LP2951 3 ERROR *V OUT = V IN SD GND 4 R1 FB 7 + 1µF SHUTDOWN INPUT 3 LP2951 SD GND 4 RESET FB 7 R2 *MINIMUM INPUT-OUTPUT VOLTAGE RANGES FROM 40mV to 400mV. DEPENDING ON LOAD CURRENT. CURRENT LIMIT IS TYPICALLY 150mA         Mar8-07 Rev E         © 2007 Sipex Corporation LP2950-5 Low Dropout Linear Regulator 9     + 6V SEALED LEADACID BATTERY SOURCE 120kΩ FB 1.5kΩ 1N457 8 +V IN V OUT 1 MAIN V+ SPX385 LP2951 FOR 5.5 V 400kΩ 3 100kΩ SD GND 4 SENSE MEMORY V+ 2 + 1µF 20kΩ NI-CAD BACKUP BATTERY      Ω                         Ω       Ω     Ω       Ω      Ω    Ω     Ω    Ω                               Ω         Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation 0     +V IN 8 AUX SHUTDOW INPUT ON OFF  +V IN SD 0K Ω. _______ 5 ERROR 5 DEGREE SHUTDOWN FLAG . LP295 V OUT GND +  FB 7  TEMP SENSOR AS5 - EXTERNAL CIRCUIT PROTECTED FROM OVER TEMPERATURE (V+ GOES OFF WHEN TEMP > 25) OR RELAY 8.2K Ω       +5V  20mA 8 +V IN V OUT N00 0.µF GND  N57 MIN VOLTAGE = V  .7mA OUTPUT UNREGULATED INPUT 8 IN V OUT  0KΩ 27KΩ 2N52 (2) LP295 FB LP295 7 2  V TAP FB 7 SENSE GND  2 5V OUTPUT + .7µF 0K Ω LOAD 50mA TO 00 mA            Mar8-07 Rev E       © 2007 Sipex Corporation LP2950-5 Low Dropout Linear Regulator  PAckAge: 3 Pin TO-92 Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation 2 PAckAge: 8 Pin nSOic Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation  ORDeRing inFORMATiOn Part number LP2950ACN-L-- LP2950ACN-L--/TR LP2950ACN-L-5-0 LP2950ACN-L-5-0/TR LP2950CN-L-- LP2950CN-L--/TR LP2950CN-L-5-0 LP2950CN-L-5-0/TR LP295ACS-L-- LP295ACS-L--/TR LP295ACS-L-5-0 LP295ACS-L-5-0/TR LP295CS-L-- LP295CS-L--/TR LP295CS-L-5-0 LP295CS-L-5-0/TR Solved by Accuracy 0.50% 0.50% 0.50% 0.50% % % % % 0.50% 0.50% 0.50% 0.50% % % % % Output Package Shipping Status Voltage .V .V 5.0V 5.0V .V .V 5.0V 5.0V .V .V 5.0V/ADJ 5.0V/ADJ .V .V 5.0V/ADJ 5.0V/ADJ Lead Free  Pin TO-92 Bulk Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Lead Free Tape & Reel  Pin TO-92 Lead Free  Pin TO-92 Bulk Lead Free Tape & Reel  Pin TO-92 Lead Free  Pin TO-92 Bulk Lead Free Tape & Reel  Pin TO-92 Lead Free  Pin TO-92 Bulk Lead Free Tape & Reel  Pin TO-92 Lead Free 8 Pin SOIC Bulk Lead Free Tape & Reel 8 Pin SOIC Lead Free 8 Pin SOIC Bulk Lead Free Tape & Reel 8 Pin SOIC Lead Free 8 Pin SOIC Bulk Lead Free Tape & Reel 8 Pin SOIC Lead Free 8 Pin SOIC Bulk Lead Free Tape & Reel 8 Pin SOIC Sipex corporation TM Headquarters and Sales Office 2 South Hillview Drive Milpitas, CA 9505 TEL: (08) 9-7500 FAX: (08) 95-700 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation  ORDeRing inFORMATiOn (continued) Part number LP2950ACN-- LP2950ACN-5-0 LP2950CN-- LP2950CN--/TR LP2950CN-5-0 LP2950CN-5-0/TR LP295ACS-- LP295ACS-5-0 LP295CS-- LP295CS--/TR LP295CS-5-0 LP295CS-5-0/TR LP2950ACN--/TR LP2950ACN-5-0/TR LP295ACS--/TR LP295ACS-5-0/TR Accuracy 0.50% 0.50% % % % % 0.50% 0.50% % % % % 0.50% 0.50% 0.50% 0.50% Output Package Shipping Status Voltage .V 5.0V .V .V 5.0V 5.0V .V .V .V  Pin TO-92  Pin TO-92  Pin TO-92  Pin TO-92 8 Pin SOIC 8 Pin SOIC Bulk Bulk Bulk Bulk Bulk Bulk Bulk Bulk EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL EOL OBS OBS OBS OBS  Pin TO-92 Tape & Reel  Pin TO-92 Tape & Reel 5.0V/ADJ 8 Pin SOIC 8 Pin SOIC Tape & Reel 5.0V/ADJ 8 Pin SOIC .V 5.0V .V 5.0V/ADJ 8 Pin SOIC Tape & Reel  Pin TO-92 Tape & Reel  Pin TO-92 Tape & Reel 8 Pin SOIC Tape & Reel 5.0V/ADJ 8 Pin SOIC Tape & Reel Solved by Sipex corporation TM Headquarters and Sales Office 2 South Hillview Drive Milpitas, CA 9505 TEL: (08) 9-7500 FAX: (08) 95-700 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Mar8-07 Rev E LP2950-5 Low Dropout Linear Regulator © 2007 Sipex Corporation 5