SPX1121M3-3.3

® SPX1121 150mA Low Dropout Voltage Regulator FEATURES ■ 5.0V and 3.3V output versions ■ 1% Output Accuracy ■ Very Low Quiescent Current ■ Low Dropout: 300mV @ 150mA ■ Very Tight Load & Line Regulation ■ Very Low Temperature Coefficient ■ Current and Thermal Limiting ■ Requires only 1µF for Stability ■ Equivalent Replacement for LT1121 ■ Industry Standard SOT-223 and TO-92 3 lead packages VOUT IIN IN OUT 5V IL SPX1121 + 0.1µF GND + 2.2µF LOAD IIN = IL + IG IG Figure 1. Fixed +5V Regulator Circuit DESCRIPTION The SPX1121 is a low power voltage regulator. It is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. The SPX1121 features very low quiescent current and low dropout voltage (typ. 20mV at 100µA and 300mV at 150mA). A tight initial tolerance (1%), extremely good load and line regulation (0.05% typ.), and very low output temperature coefficient (20 ppm/°C typ.), make the SPX1121 useful as a low power voltage reference. PACKAGES SOT-223 Package (M3) TO-92 (N) 1 2 3 SPX1121 1 2 3 OUTPUT INPUT GND VIN GND V OUT Front View Bottom View Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator © Copyright 2002 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS Power Dissipation........................................Internally Limited Lead Temperature (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 ESD Rating................................................................2kV min ELECTRICAL CHARACTERISTICS applies over the full operating temperature ranges. VIN=6V, IL=100µA, CL=1µF (NOTE 2), TA = 25°C, unless otherwise specified. Boldface PARAMETER 3.3 V Versions Output Voltage 5 V Versions Output Voltage All Voltage Options Output Voltage Temperature Coefficient Line Regulation (NOTE 3) Load Regulation (NOTE 3) Dropout Voltage (NOTE 5) CONDITIONS TJ=25°C 1mA ≤IL ≤150 mA TJ = 25°C 1 mA ≤IL ≤150 mA (NOTE 1) 6V≤VIN≤30V (NOTE 4) 100 µA≤IL≤150 mA IL = 100µA IL = 1mA IL = 100 mA IL = 150 mA IL = 100µA IL = 1mA IL = 10mA IL = 50mA IL = 100 mA IL = 150 mA VOUT = 0 CL = 1µF CL = 200 µF MIN. 3.267 3.217 4.950 4.880 TYP. 3.300 3.300 5.000 5.000 20 0.03 0.04 20 110 270 300 100 110 350 1 3 5 230 0.05 430 160 MAX 3.333 3.382 5.050 5.120 100 0.20 0.60 UNIT V V ppm/°C % % mV Ground Current 550 170 µA mA 6 10 500 0.20 Current Limit Thermal Regulation Output Noise, 10Hz to 100kHz mA %/W µV rms µV rms 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°C, VIN = 6V, IL = 100µA and CL = 1µF. 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 SPX1121 is tested at IL = 1mA. For TJ = 125°C, line regulation is guaranteed by design. 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. Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator © Copyright 2002 Sipex Corporation 2 TYPICAL PERFORMANCE 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 Ground Current vs. Load 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 vs. Input Voltage 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. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator © Copyright 2002 Sipex Corporation 3 TYPICAL PERFORMANCE CHARACTERISTICS 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 100 mV 50 mV INPUT OUTPUT VOLTAGE VOLTAGE CHANGE Drop-Out Voltage 10 IO = 100µA Short Circuit Current 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 V OUT = 5V C L = 1µF I O = 1mA I O = 100mA 70 IL = 0 0 -50 mV ~ ~ 8V 6V 4V 0 200 400 TIME(µs) C L = 1µF I L = 1mA V OUT = 5V 60 50 40 30 20 10 1 10 2 10 3 10 4 10 5 10 6 C L = 1µF V IN = 6V V OUT = 5V I L = 100µA 600 800 FREQUENCY (Hz) FREQUENCY (Hz) Line Transient Response 90 80 RIPPLE REJECTION (dB) Output Impedance 80 I L = 50mA Ripple Rejection 2.3 RIPPLE REJECTION (dB) 70 60 50 40 30 20 10 1 I L = 1mA 60 50 40 30 20 I L = 100mA MINIMUM OPERATING VOLTAGE (V) C L = 1µF V IN = 6V V OUT = 5V 70 2.1 C L = 1µF V IN = 6V V OUT = 5V 1.9 I L = 10mA 10 10 2 10 3 10 4 10 5 10 6 10 1 10 2 10 3 10 4 10 5 10 6 1.7 -75 -50 -25 0 25 50 75 100 125 150 FREQUENCY (Hz) FREQUENCY (Hz) TEMPERATURE Ripple Rejection Ripple Rejection Minimum Operating Voltage Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator © Copyright 2002 Sipex Corporation 4 TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) 250 200 150 LOAD OUTPUT VOLTAGE CURRENT CHANGE (mV) LOAD OUTPUT VOLTAGE CURRENT CHANGE (mV) 80 60 40 OUTPUT CURRENT (mA) 120 100 80 60 40 20 0 0 4 8 12 16 20 0 5 10 15 20 25 30 TIME (ms) INPUT VOLTAGE (V) T A = 85 ºC TO-92 PACKAGE 0.25" LEADS SOLDERED TO PC BOARD Vout=5V T JMAX = 125 ºC 100 50 0 -50 -100 ~ ~ C L = 1µ F V OUT = 5V 20 0 -20 -40 -60 ~ ~ C L = 10µF V OUT = 5V T A =25 ºC 100 µA mA 100 100 100 0 1 2 TIME (ms) µA µA 3 4 5 Load Transient Response Load Transient Response Maxium Rated Output 30 5 OUTPUT VOLTAGE CHANGE (mV) OUTPUT VOLTAGE CHANGE (mV) 4 2 0 -2 25 20 15 10 5 0 ~ ~ 10 5 0 -5 -10 5 10 15 20 T J = 125 ºC T J = 150 ºC I L = 100µA I L = 1mA POWER DISSIPATION (W) ~ ~ 1 1.25W I L = 100µA 0 -1 0 10 20 30 40 50 TIME (µs) 25 30 INPUT VOLTAGE (V) Thermal Response Line Regulation Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator © Copyright 2002 Sipex Corporation 5 APPLICATIONS HINTS EXTERNAL CAPACITORS The stability of the SPX1121 requires a 1µF 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 25°C solid tantalum is recommended since the many aluminum types have electrolytes that freeze at about -30°C. The ESR of about 5Ω or less and resonant frequency above 500kHz are the most important parameters in the value of the capacitor. The capacitors value may be increased without limit. The SPX1121 unlike other low dropout regulators will remain stable and in regulation with no load in addition to the internal voltage divider. This feature is especially important in applications like CMOS RAM keep-alive. 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 0.1µF tantalum or aluminum electrolytic capacitor should be placed from the input to the ground. REDUCING OUTPUT NOISE 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. Increasing the capacitor from 1µF to 220 µF decreases the noise from 430µV to 160µVRMS for a 100kHz bandwidth at 5V output. Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator © Copyright 2002 Sipex Corporation 6 PACKAGE: 3 Lead SOT-223 0.124 0.116 0.146 0.130 0.295 0.264 0.0905 NOM 0.181 NOM 0.041 0.033 0.067 0.028 0.264 0.248 16°C 10°C 0.014 0.010 0.0040 0.0008 10°C Max 0.033 0.025 16°C 10°C Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator © Copyright 2002 Sipex Corporation 7 PACKAGE: 0.090 (2.286) Radius typ. 2 1 3 TO-92 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) 0.055 (1.397) 0.045 (1.143) 0.105 (2.667) 0.095 (2.413) Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator © Copyright 2002 Sipex Corporation 0.0155 (0.3937) 0.0145 (0.3683) 8 ORDERING INFORMATION PART NUMBER ACCURACY OUTPUT VOLTAGE SPX1121N-3.3 ..................... 1% .................... 3.3V ................... SPX1121N-5.0 ..................... 1% .................... 5.0V ................... SPX1121M3-3.3 ................... 1% .................... 3.3V ................... SPX1121M3-5.0 ................... 1% .................... 5.0V ................... Please consult the factory for pricing and availability on a Tape-On-Reel option. PACKAGE 3 lead TO-92 3 lead TO-92 3 lead SOT-223 3 lead SOT-223 Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com 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. Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator © Copyright 2002 Sipex Corporation 9