150mA Low Dropout Voltage Regulator

® SPX2950/SPX2951 150mA Low Dropout Voltage Regulator FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ 5.0V and 3.3V at 150mA Output Accurate: 0.5% for SPX2950A/SPX2951A Very Low Quiescent Current Low Dropout Voltage: 300mV at 150mA Extremely Tight Load and Line Regulation Very Low Temperature Coefficient Current & Thermal Limiting Need Only 1µF for Stability Offered in TO-92 (SPX2950) and SOIC (SPX2951) ■ Direct Replacement for LP2950/LP2951 SPX2951 versions only ■ Error Flag Warns of Output Dropout ■ Logic-Controlled Electronic Shutdown ■ Output Programmable From 1.24 to 30V APPLICATIONS ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Battery Powered Systems Cordless Telephones Radio Control Systems Portable/Palm Top/Notebook Computers Portable Consumer Equipment Portable Instrumentation Avionics SMPS Post-Regulator Voltage Reference Automotive Electronics DESCRIPTION The SPX2950 and SPX2951 are low power voltage regulators. These devices are an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. The SPX2950 and SPX2951 feature low quiescent current and low dropout voltage (typ. 20mV at 100µA and 300mV at 150mA). This includes a tight initial tolerance of (0.5% for SPX2950A/SPX2951A), extremely good load and line regulation (0.05% typ.), and very low output temperature coefficient (20ppm/ °C typ.), making the SPX2950/SPX2951 useful as a low-power voltage reference. The error flag output feature is used as a power-on reset for warning of a low output voltage, due to a falling voltage. The logic compatible shutdown feature enables the regulator to be switched ON and OFF. The SPX2950 is offered in a 3-pin TO-92 package compatible with other 5.0V, 3.3V regulators. The SPX2951 is availiable in an 8-lead SOIC package. UNREGULATED DC 5V 7 FEEDBACK + 8 INPUT 1 OUTPUT 2 SENSE + _ FROM CMOS OR TTL 180kΩ 6 ERROR AMPLIFIER 5V TAP 3 SHUTDOWN 60 mV 330kΩ + 60kΩ + 5 ______ ERROR + _ ERROR DETECTION COMPARATOR 1µF . . TO CMOS OR TTL + 1.23V 4 REFERENCE GROUND Block Diagram of SPX2951, 8 Lead 5V Version Rev. 3/6/03 SPX2950/SPX2951 150mA Low Dropout Voltage Regulator ©Copyright 2003 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS Power Dissipation ........................................................ Internally Limited Lead Temp. (Soldering, 5 Seconds) ............................................. 260°C Storage Temperature Range ........................................ -65°C to +150°C Operating Junction Temperature Range ....................... -40°C to +125°C Input Supply Voltage ........................................................ -0.3V to +30V Feedback Input Voltage ................................................ -1.5V to +30V Shutdown Input Voltage ................................................ -0.3V to +30V Error Comparator Output .............................................. -0.3V to +30V ESD Rating ............................................................................ 2kV Min ELECTRICAL CHARACTERISTICS Electrical characteristics at VIN = VO+1V, IL=100µA, CL=1µF (note 2) TA=25°C, unless otherwise specified. Boldface applies over the full operating temperature range. PARAMETER CONDITIONS MIN TYP SPX2950AC SPX2951AC 3.3V Version Output Voltage TJ=25°C -25°C≤TJ≤85°C Full Operating Temperature 100µA≤ IL ≤150mA TJ≤TJMAX TJ=25°C -25°C≤TJ≤85°C Full Operating Temperature 100µA≤IL≤150mA TJ≤TJMAX (Note1) VO+1V ≤ VIN ≤ 30V (Note 4) IL=100µA IL=100mA IL=150mA IL=100µA IL=100mA IL=150mA VOUT=0 CL=1µF CL=200µF CL=3.3µF, Bypass=0.01µF from pin 7 to pin1 (SPX2951) 1.220 Over Temperature (Note 6) 1.190 40 20 0.1 3.284 3.267 3.260 3.254 3.3 3.3 3.3 3.3 3.317 3.333 3.340 3.346 3.267 3.251 3.324 3.221 3.3 3.3 3.3 3.3 3.333 3.350 3.366 3.379 V MAX MIN TYP SPX2950C SPX2951C MAX UNITS Output Voltage 5.0V Version Output Voltage V 4.975 4.950 4.940 4.925 5.0 5.0 5.0 5.0 5.025 5.050 5.060 5.075 4.950 4.925 4.900 4.880 5.0 5.0 5.0 5.0 5.050 5.075 5.100 5.120 V Output Voltage All Voltage Options Output Voltage Temperature Coefficient Line Regulation (Note 3) Dropout Voltage (Note5) V 20 0.03 0.04 20 270 300 150 3 5 230 0.05 430 160 100 SPX2951AC 1.235 100 0.1 0.1 80 450 500 170 6 8 0.2 50 0.04 0.1 20 270 300 150 3 5 230 0.05 430 160 100 SPX2951C 1.210 1.185 40 50 0.1 1.235 150 0.2 0.2 80 450 500 170 6 8 0.2 ppm/°C % % mV mV mV µA mA mA mA %/W µVrms µVrms µVrms Load Regulation (Note 3) 100µA≤IL≤150mA Ground Current Current Limit Thermal Regulation Output Noise, 10Hz to 100kHz 8-Pin Version only Reference Voltage Reference Voltage Feedback Pin Bias Current Reference Voltage Temperature Coefficient Feedback Pin Bias Current Temperature Coefficient 1.250 1.270 60 1.260 1.285 60 V V nA ppm/°C nA/°C Rev. 3/6/03 SPX2950/SPX2951 150mA Low Dropout Voltage Regulator ©Copyright 2003 Sipex Corporation 2 ELECTRICAL CHARACTERISTICS: Continued Electrical characteristics at VIN = VO+1V, IL=100µA, CL=1µF (note 2) TA=25°C, unless otherwise specified. Boldface applies over the full operating temperature range. PARAMETER Error Comparator Output Leakage Current Output Low Voltage V0H=30V VIN=VO-0.5V I0L=400µA 40 0.01 150 60 75 15 1.3 2.0 30 400 3 50 800 10 0.7 2.0 30 400 3 50 800 10 95 1 250 40 0.01 150 60 75 15 1.3 0.7 95 1 250 µA mV mV mV mV V V µA µA µA CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Upper Threshold Voltage (Note 7) Lower Threshold Voltage (Note 7) Hysteresis Shutdown Input Input Logic Voltage Low (Regulator ON) High (Regulator OFF) (Note 7) Shutdown Pin Input Current VS=2.4V VS=30V Regulator Output Current (Note 8) in Shutdown 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 are guaranteed for TJ = 25°C, VIN = VO +1V, IL = 100µA 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 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 the specification for thermal regulation. Note 4: Line regulation for the SPX2951 is tested at IL = 1mA. 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),2.3≤VIN≤30V, 100µA≤IL≤150mA, TJ≤TJMAX. Note 7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage measured at 6V 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/1.235 = 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 8: VSHUTDOWN ≥ 2V, VIN ≤ 30V, VOUT = 0, Feedback pin tied to 5V/ 3.3V tap. Rev. 3/6/03 SPX2950/SPX2951 150mA Low Dropout Voltage Regulator ©Copyright 2003 Sipex Corporation 3 TYPICAL PREFORMANCE CHARACTERISTICS 6 5 OUTPUT VOLTAGE (VOLTS) INPUT CURRENT (µA) 250 225 R L = 50kΩ GROUND PIN CURRENT (mA) 10 200 175 150 125 100 75 50 25 0 0 1 2 3 4 5 6 0 1 2 3 4 5 6 7 8 9 10 INPUT VOLTAGE (VOLTS) RL = 8 4 R L =50kΩ 1 3 R L =50kΩ 2 1 0 INPUT VOLTAGE (VOLTS) 0.1 0.01 0.1 1 10 100 LOAD CURRENT (mA) Dropout Characteristics Input Current Quiescent Current 320 280 GROUND CURRENT (µA) INPUT CURRENT (mA) 240 200 160 IL= 0 I L = 1mA 120 80 40 0 0 1 2 3 4 5 6 7 8 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 0 1 2 3 4 5 6 6 GROUND CURRENT (mA) R L =50 Ω VOUT = 5V 5 V IN = 6V I L = 100mA 4 3 7 8 9 10 -75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (ºC) INPUT VOLTAGE (VOLTS) INPUT VOLTAGE (VOLTS) Ground Current 8 7 Input Current 190 Ground Current QUIESCENT CURRENT (µA) GROUND CURRENT (mA) 6 I L =100mA 170 V IN =6V I L =100uA 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 150 130 -75 -50 -25 0 25 50 75 100 125 150 INPUT VOLTAGE TEMPERATURE (ºC) Ground Current Quiescent Current Rev. 3/6/03 SPX2950/SPX2951 150mA Low Dropout Voltage Regulator ©Copyright 2003 Sipex Corporation 4 TYPICAL PREFORMANCE CHARACTERISTICS: (Continued) 500 I L = 150mA SHORT CIRCUIT CURRENT (mA) 500 240 230 400 DROP-OUT VOLTAGE (mV) DROP-OUT VOLTAGE (mV) 400 220 210 200 190 180 170 -75 -50 -25 300 200 ~ ~ 300 200 TJ = 25ºC 40 20 0 -75 -50 -25 0 25 50 75 100 125 150 I L = 100µA 100 0 100µA 1mA 10mA 100mA 0 25 50 75 100 125 150 TEMPERATURE (ºC) OUTPUT CURRENT TEMPERATURE (ºC) Drop-Out Voltage 8 V OUT = 5V Drop-Out Voltage 2.5 T A = 125ºC Short Circuit Current 100 mV 50 mV INPUT OUTPUT VOLTAGE VOLTAGE CHANGE 6 COMPARATOR OUTPUT (V) SINK CURRENT (mA) 2.0 4 HYSTERESIS 0 -50 mV ~ ~ 8V 6V 4V 0 200 400 TIME(µs) C L = 1µF I L = 1mA V OUT = 5V 1.5 T A = 25ºC 2 0 -2 0 1 PULLUP RESISTOR TO SEPARATE 5V SUPPLY 1.0 T A = -55ºC 0.5 0.0 2 3 4 5 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 IO = 100µA SPX2951 Comparator Sink Current 90 80 RIPPLE REJECTION (dB) Line Transient Response 90 80 RIPPLE REJECTION (dB) OUTPUT IMPEDANCE (OHMS) 5 2 1 0.5 0.2 0.1 0.05 0.02 0.01 10 100 1K 10K 100K 1M FREQUENCY (Hz) V OUT = 5V C L = 1µF I O = 1mA I O = 100mA 70 IL = 0 70 60 50 40 30 20