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 IIN VOUT OUT IN 5V IL SPX1121 LOAD + + 0.1µF 2.2µF GND IG IIN = IL + 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 VIN GND 3 INPUT OUTPUT V GND OUT Bottom View Front View Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator 1 © Copyright 2002 Sipex Corporation ABSOLUTE MAXIMUM RATINGS Operating Junction Temperature Range......-40°C to +125°C Input Supply Voltage...........................................-0.3V to +30V ESD Rating................................................................2kV min Power Dissipation........................................Internally Limited Lead Temperature (soldering, 5 seconds) ................260°C Storage Temperature Range........................-65°C to +150°C ELECTRICAL CHARACTERISTICS VIN=6V, IL=100µA, CL=1µF (NOTE 2), TA = 25°C, unless otherwise specified. Boldface applies over the full operating temperature ranges. 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) Ground Current Current Limit Thermal Regulation Output Noise, 10Hz to 100kHz CONDITIONS MIN. TYP. MAX TJ=25°C 1mA ≤IL ≤150 mA 3.267 3.217 3.300 3.300 3.333 3.382 V TJ = 25°C 1 mA ≤IL ≤150 mA 4.950 4.880 5.000 5.000 5.050 5.120 V 20 100 ppm/°C 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 0.03 0.04 20 110 270 300 100 110 350 0.20 0.60 % % mV IL = 50mA IL = 100 mA IL = 150 mA VOUT = 0 1 3 5 230 0.05 430 160 (NOTE 1) CL = 1µF CL = 200 µF 550 170 UNIT µA mA 6 10 500 0.20 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 2 © Copyright 2002 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS 6 10 250 225 R L =50kΩ 3 R L =50kΩ 2 R L = 50kΩ 175 150 125 100 RL = 8 4 GROUND PIN CURRENT (mA) 200 INPUT CURRENT (µA) OUTPUT VOLTAGE (VOLTS) 5 75 50 1 1 0.1 25 0 0 1 2 3 4 5 0 6 1 2 320 240 INPUT CURRENT (mA) GROUND CURRENT (µA) 280 I L = 1mA 200 160 IL= 0 120 80 40 1 2 3 6 7 8 4 5 0.01 0.1 9 10 6 7 R L =50 Ω VOUT = 5V 5 V IN = 6V I L = 100mA 4 3 1 2 3 4 5 6 7 8 -75 -50 -25 9 10 0 25 50 75 100 125 150 TEMPERATURE (ºC) INPUT VOLTAGE (VOLTS) Ground Current vs. Input Voltage 100 6 0 INPUT VOLTAGE (VOLTS) 10 Ground Current vs. Load Current 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 8 1 LOAD CURRENT (mA) Input Current Dropout Characteristics 0 5 INPUT VOLTAGE (VOLTS) INPUT VOLTAGE (VOLTS) 0 4 3 GROUND CURRENT (mA) 0 Ground Current Input Current 190 8 6 QUIESCENT CURRENT (µA) GROUND CURRENT (mA) 7 I L =100mA 5 4 3 2 1 170 V IN =6V I L =100uA 150 130 0 0 1 2 3 4 5 6 7 -75 -50 -25 8 Ground Current Rev. 10/11/02 0 25 50 75 100 125 150 TEMPERATURE (ºC) INPUT VOLTAGE Quiescent Current SPX1121 150mA Low DropoutVoltage Regulator 3 © Copyright 2002 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS 500 500 240 I L = 150mA 230 300 200 ~ ~ 40 20 I L = 100µA 0 300 200 TJ = 25ºC 100 0 -75 -50 -25 0 25 50 100µA 75 100 125 150 TEMPERATURE (ºC) 10mA 210 200 190 180 170 -75 -50 -25 100mA 0 25 50 75 100 125 150 TEMPERATURE (ºC) Drop-Out Voltage Short Circuit Current 10 100 mV 90 0 C L = 1µF I L = 1mA V OUT = 5V -50 mV ~ ~ 8V 6V 5 80 I O = 1mA 2 RIPPLE REJECTION (dB) OUTPUT IMPEDANCE (OHMS) IO = 100µA 50 mV I O = 100mA 1 0.5 V OUT = 5V C L = 1µF 0.2 0.1 0.05 0.02 0 200 400 600 10 800 IL = 0 60 50 40 100 1K 10K 100K 1M 10 1 10 2 FREQUENCY (Hz) TIME(µs) 90 10 3 10 4 10 5 10 6 FREQUENCY (Hz) Output Impedance Line Transient Response I L = 100µA C L = 1µF V IN = 6V V OUT = 5V 20 0.01 4V 70 30 Ripple Rejection 80 2.3 I L = 50mA 80 I L = 1mA RIPPLE REJECTION (dB) 70 70 C L = 1µF V IN = 6V V OUT = 5V 60 50 40 60 MINIMUM OPERATING VOLTAGE (V) INPUT OUTPUT VOLTAGE VOLTAGE CHANGE 1mA 220 OUTPUT CURRENT Drop-Out Voltage RIPPLE REJECTION (dB) SHORT CIRCUIT CURRENT (mA) 400 DROP-OUT VOLTAGE (mV) DROP-OUT VOLTAGE (mV) 400 I L = 100mA 50 40 C L = 1µF V IN = 6V V OUT = 5V 30 20 30 10 I L = 10mA 20 10 1 10 2 10 3 10 4 10 5 10 6 10 1 10 2 Ripple Rejection Rev. 10/11/02 10 3 10 4 10 5 FREQUENCY (Hz) FREQUENCY (Hz) Ripple Rejection 10 6 2.1 1.9 1.7 -75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE Minimum Operating Voltage SPX1121 150mA Low DropoutVoltage Regulator 4 © Copyright 2002 Sipex Corporation 80 60 150 40 100 20 50 0 -50 C L = 1µF V OUT = 5V -100 ~ ~ 100 mA 120 TO-92 PACKAGE 0.25" LEADS SOLDERED TO PC BOARD 100 OUTPUT CURRENT (mA) 250 200 LOAD OUTPUT VOLTAGE CURRENT CHANGE (mV) LOAD OUTPUT VOLTAGE CURRENT CHANGE (mV) TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) 0 -20 C L = 10µF V OUT = 5V -40 -60 ~ ~ 80 Vout=5V T JMAX = 125 ºC 60 40 T A =25 ºC T A = 85 ºC 20 100 µA 100 100 µA µA 0 1 2 3 4 0 5 0 4 TIME (ms) 8 12 16 5 0 20 Load Transient Response 10 15 20 25 INPUT VOLTAGE (V) TIME (ms) Maxium Rated Output Load Transient Response 30 OUTPUT VOLTAGE CHANGE (mV) OUTPUT VOLTAGE CHANGE (mV) 5 4 2 0 POWER DISSIPATION (W) -2 ~~ 1 1.25W 25 20 I L = 100µA 15 T J = 150 ºC 10 5 I L = 1mA 0 ~~ 10 5 0 T J = 125 ºC -5 0 -10 -1 0 10 20 30 40 5 50 10 15 20 25 30 INPUT VOLTAGE (V) TIME (µs) Thermal Response Rev. 10/11/02 I L = 100µA Line Regulation SPX1121 150mA Low DropoutVoltage Regulator 5 © Copyright 2002 Sipex Corporation 30 APPLICATIONS HINTS REDUCING OUTPUT NOISE EXTERNAL CAPACITORS 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. 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. Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator 6 © Copyright 2002 Sipex Corporation PACKAGE: 3 Lead SOT-223 0.124 0.116 0.146 0.130 0.295 0.264 0.041 0.033 0.0905 NOM 0.181 NOM 0.067 0.028 0.0040 0.0008 0.264 0.248 10°C Max 0.014 0.010 16°C 10°C 0.033 0.025 Rev. 10/11/02 16°C 10°C SPX1121 150mA Low DropoutVoltage Regulator 7 © Copyright 2002 Sipex Corporation PACKAGE: TO-92 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 0.085 (2.159) Diameter 0.185 (4.699) 0.045 (1.143) 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) Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator 8 © Copyright 2002 Sipex Corporation 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 ................... PACKAGE 3 lead TO-92 3 lead TO-92 3 lead SOT-223 3 lead SOT-223 Please consult the factory for pricing and availability on a Tape-On-Reel option. 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: [email protected] 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 9 © Copyright 2002 Sipex Corporation