® SPX3819 500mA, Low-Noise LDO Voltage Regulator FEATURES ■ ■ ■ ■ ■ ■ ■ Low Noise: 40µV Possible High Accuracy: 1% Reverse Battery Protection Low Dropout: 340mV at Full Load Low Quiescent Current: 90µA Zero Off-Mode Current Fixed Output: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 5.0V ■ 5 Pin SOT-23, 8 Pin nSOIC and 8 pin 2X3 DFN Packages. EN 1 SPX3819 8 ADJ/BYP 7 GND NC 2 VIN 3 8 Pin DFN 6 NC 4 5 NC VOUT APPLICATIONS ■ ■ ■ ■ ■ ■ ■ ■ Battery Powered Systems Cordless Phones Radio Control Systems Portable/Palm Top/Notebook Computers Portable Consumer Equipment Portable Instrumentation Bar Code Scanners SMPS Post Regulators Now Available in Lead Free Packaging DESCRIPTION The SPX3819 is a positive voltage regulator with a low dropout voltage and low noise output. In addition, this device offers a very low ground current of 800µA at 100mA output. The SPX3819 has an initial tolerance of less than 1% max and a logic compatible ON/OFF switched input. When disabled power consumption drop to nearly zero. Other key features include reverse battery protection, current limit, and thermal shutdown. The SPX3819 includes a reference bypass pin for optimal low noise output performance. With its very low output temperature coefficient, this device also makes a superior low power voltage reference. The SPX3819 is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. It is available in several fixed voltages 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 5.0V or with an adjustable output. This device is offered in 8 pin nSOIC, 8 pin DFN and 5-pin SOT-23 packages. TYPICAL APPLICATION CIRCUIT VIN 1 VOUT 5 + 2 + SPX3819 GND 3 4 EN BYP (Opt.) ENABLE may be tied directly to VIN TOP View Date:6/8/2004 SPX3819 500mA, Low Noise LDO Voltage Regulator 1 © Copyright 2004 Sipex Corporation ABSOLUTE MAXIMUM RATINGS Power Dissipation ...................................................... Internally Limited Lead Temp. (Soldering, 5 Seconds) ........................................... 260°C Operating Junction Temperature Range ................... -40°C to +125°C Input Supply Voltage ........................................................ -20V to +20V Enable Input Voltage ........................................................ -20V to +20V RECOMMENDED OPERATIONG CONDITIONS Input Voltage ................................................................... +2.5V to+16V Operating Junction Temperature Range ................... -40°C to +125°C Enable Input Voltage .............................................................. 0V to VIN ELECTRICAL CHARACTERISTICS TJ=25°C, VOUT + 1V, for 1.2V Option VIN=VOUT + 1.2V IL=100µA, CL=1µF, and VENABLE ≥ 2.4V. The ♦ denotes the specifications which apply over full operating temperature range -40°C to +85°C, unless otherwise specified. PARAMETER Output Voltage Tolerance MIN TYP -1 -2 Output Voltage Temperature Coef. MAX UNITS +1 +2 % 57 ♦ CONDITIONS ♦ ppm/°C Line Regulation 0.04 0.1 %/V Load Regulation 0.05 0.4 % IL = 0.1mA to 500mA Dropout Voltage (VIN-VO)(Note 2) 10 60 80 mV IL = 100µA 125 175 250 mV 350 450 mV 550 700 mV 3 8 µA 150 190 µA 650 900 µA 2.0 2.5 mA 25.0 30.0 mA 180 340 Quiescent Current (IGND) 0.05 Ground Pin Current (IGND) 90 250 1.0 6.5 ♦ ♦ VENABLE ≤ 0.4V VENABLE ≤ 0.25V IL = 100µA ♦ IL = 50mA ♦ IL = 150mA ♦ IL = 500mA ♦ 70 dB mA 950 VOUT = 0V ♦ 300 µVRMS IL=10mA, CL=1.0µF, CIN=1µF, (10Hz-100kHz) 40 µVRMS IL=10mA, CL=10µF, CBYP =1µF, CIN =1µF, (10Hz-100kHz) Input Voltage Level Logic Low (VIL) Thermal Resistance (Note 1) IL = 500mA ♦ 800 ENABLE Input Current IL = 150mA ♦ Current Limit (ILIMIT) Input Voltage Level Logic High (VIH) IL = 50mA ♦ Ripple Rejection (PSRR) Output Noise (eNO) VIN=VOUT + 1V to 16V 0.4 2 0.01 3 2 20 V OFF V ON µA VIL ≤ 0.4V VIH ≥ 2.0V 220 °C/W ♦ SOT-23-5 / Junction to Ambient 180 °C/W ♦ SO-8 / Junction to Ambient NOTES Note 1: The maximum allowable power dissipation is a function of maximum operating junction temperature, TJ(max) the junction to ambient thermal resistance, and the ambient θJA, and the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is given: PD(max) = (TJ(max)-TA)/θJA, exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown. The θJA of the SPX3819 is 220°C/W mounted on a PC board. Note 2: Not applicable to output voltage 2V or less. Date:6/8/2004 SPX3819 500mA, Low Noise LDO Voltage Regulator 2 © Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS 7.0 160 3.3V Device VIN= 4.3V CL = 1.0µF 6.0 150 140 5.0 IGND (µA) IGND (mA) 130 4.0 3.0 2.0 120 110 100 90 3.3V Device CL= 1.0µF IL = 100µA 80 1.0 70 60 4 0.0 0 100 200 300 400 500 6 8 IL (mA) 10 12 14 16 VIN (V) Ground Current vs Input Voltage Ground Current vs Load Current 14.0 3.350 3.3V Device VIN= 4.3V CL = 1.0µF 12.0 3.345 3.340 3.335 10.0 VOUT (V) IGND (mA) 3.330 8.0 6.0 3.325 3.320 3.315 3.310 4.0 3.3V Device CL= 1.0µF IL = 100µA 3.305 3.300 2.0 3.295 3.290 0.0 0 100 200 300 400 4 500 6 10 12 14 16 VIN (V) IL (mA) Output Voltage vs Input Voltage Ground Current vs Load Current in Dropout Date:6/8/2004 8 SPX3819 500mA, Low Noise LDO Voltage Regulator 3 © Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS: Continued 350 3.316 3.3V Device VIN= 3.2V CL = 1.0µF 250 3.314 3.3V Device VIN= 4.3V CL = 1.0µF 3.312 3.310 200 VOUT (V) Dropout (mV) 300 150 3.308 3.306 100 3.304 50 3.302 0 0 100 200 300 400 3.300 500 0 100 200 IL (mA) 300 400 500 IL (mA) Output Voltage vs Load Current Dropout Voltage vs Load Current 130 360 3.3V Device VIN= 4.3µF CL= 1.0µF IL = 100µA 120 3.3V Device VIN = 4.3 CL= 1.0µF IL = 50mA 340 320 300 IGND (µA) IGND (µA) 110 100 280 260 90 240 80 220 200 70 -40 -20 0 20 40 60 80 100 -40 120 -20 20 40 60 80 100 120 Temperature (°C) Temperature (°C) Ground Current vs Temperature with 50mA Load Ground Current vs Temperature with 100µA Load Date:6/8/2004 0 SPX3819 500mA, Low Noise LDO Voltage Regulator 4 © Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS: Continued 14.0 8.0 3.3V Device VIN= 4.3µF CL= 1.0µF IL = 500mA 13.5 13.0 IGND (mA) IGND (mA) 7.5 3.3V Device VIN= 4.3µF CL= 1.0µF IL = 500mA 7.0 12.5 12.0 11.5 6.5 11.0 6.0 10.5 -40 -20 0 20 40 60 80 100 120 -40 -20 0 Temperature (°C) 40 60 80 100 120 Temperature (°C) Ground Current vs Temperature in Dropout Ground Current vs Temperature with 500mA Load 3.400 1.30 3.3V Device CL= 1.0µF IL = 100µA 1.25 3.380 3.3V Device VIN= 4.3µF CL= 1.0µF IL = 500mA 3.360 3.340 1.20 VOUT (V) VEN, On Threshold (V) 20 1.15 3.320 3.300 2.280 1.10 2.260 2.240 1.05 2.220 2.200 1.00 4 6 8 10 12 14 -40 16 -20 20 40 60 80 100 120 Output Voltage vs Temperature ENABLE Voltage, ON threshold, vs Input Voltage Date:6/8/2004 0 Temperature (°C) VIN (V) SPX3819 500mA, Low Noise LDO Voltage Regulator 5 © Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS: Continued 350 Cin = 1uFT, Cout = 1uFT Cin = 1uFT, Cout = 2.2uFT Cin = 1uFT Cout = 10uFT 300 uV RMS 250 200 150 100 50 0 1 10 100 1000 10000 Bypass Cap (pF) 100000 1000000 Line Transient Response for 3.3V Device Output Noise vs Bypass Capacitor Value IL = 10mA, 10Hz - 100kHz Load Transient Response for 3.3V Device Date:6/8/2004 SPX3819 500mA, Low Noise LDO Voltage Regulator 6 © Copyright 2004 Sipex Corporation APPLICATION INFORMATION The SPX3819 requires an output capacitor for device stability. Its value depends upon the application circuit. In general, linear regulator stability decreases with higher output currents. In applications where the SPX3819 is putting out less current, a lower output capacitance may be sufficient. For example, a regulator sourcing only 10mA, requires approximately half the capacitance as the same regulator sourcing 150mA. The SPX3819 start-up speed is inversely proportional to the size of the BYP capacitor. Applications requiring a slow ramp-up of the output voltage should use a larger CBYP. However, if a rapid turn-on is necessary, the BYP capacitor can be omitted. The SPX3819’s internal reference is available through the BYP pin. Bench testing is the best method for determining the proper type and value of the capacitor since the high frequency characteristics of electrolytic capacitors vary widely, depending on type and manufacturer. A high quality 2.2µF aluminum electrolytic capacitor works in most application circuits, but the same stability often can be obtained with a 1µF tantalum electrolytic. Figure 1 represents a SPX3819 standard application circuit. The EN (enable) pin is pulled high (>2.0V) to enable the regulator. To disable the regulator, EN < 0.4V. The SPX3819 in Figure 2 illustrates a typical adjustable output voltage configuration. Two resistors (R1 and R2) set the output voltage. The output voltage is calculated using the formula: With the SPX3819 adjustable version, the minimum value of output capacitance is a function of the output voltage. The value decreases with higher output voltages, since closed loop gain is increased. VOUT = 1.235V x [ 1 + R1/R2] R2 must be > 10 kΩ and for best results, R2 should be between 22 kΩ and 47kΩ. A capacitor placed between Adj and ground will provide improved noise performance. Typical Applications Circuits A 10nF capacitor on BYP pin will significantly reduce output noise but it may be left unconnected if the output noise is not a major concern. VIN 1 VOUT 5 VIN 1 + + SPX3819 + 4 + SPX3819 SOT-23 GND 3 3 EN 4 ADJ EN BYP (Opt.) Hi-ON Lo-OFF ENABLE may be tied directly to VIN TOP View BYP (Opt.) R2 TOP View Figure 2. Typical Adjustable Output Voltage Configuration Figure 1. Standard Application Circuit Date:6/8/2004 R1 2 2 GND VOUT 5 SPX3819 500mA, Low Noise LDO Voltage Regulator 7 © Copyright 2004 Sipex Corporation PACKAGE: PIN DESCRIPTION Pin # nSOIC Pin # DFN Pin # SOT-3 Pin Name 2 3 1 VIN 5-8 7 2 GND Ground 3 5 5 VOUT Regulator Output 1 1 3 EN Enable(input). CMOS compatible control input. Logic high = enable; logic low or open = shutdown 4 8 4 ADJ/BYP Adjust(input). Feedback input. Connect to resistive voltage-divider network - 4, 6 - NC Description Supply Input No Connect PACKAGE: PINOUTS EN 1 SPX3819 8 ADJ/BYP 7 GND NC 2 VIN 3 8 Pin DFN 6 NC 4 5 8 GND EN 1 NC VOUT VIN 2 SPX3819 7 GND VOUT 3 8 Pin nSOIC 6 GND ADJ/BYP 4 VOUT 5 GND ADJ/BYP 5 4 SPX3819 5 Pin SOT-23 Date:6/8/2004 1 2 3 VIN GND EN SPX3819 500mA, Low Noise LDO Voltage Regulator 8 © Copyright 2004 Sipex Corporation PACKAGE: 8 PIN SOIC D e E/2 E1 E SEE VIEW C E1/2 1 b INDEX AREA (D/2 X E1/2) Ø1 A TOP VIEW Gauge Plane L2 Seating Plane Ø1 Ø L L1 VIEW C A2 A SEATING PLANE A1 SIDE VIEW DIMENSIONS Minimum/Maximum (mm) b WITH PLATING 8 Pin NSOIC (JEDEC MS-012, AA - VARIATION) COMMON HEIGHT DIMENSION SYMBOL A A1 A2 b c D E E1 e L L1 L2 Ø Ø1 Date:6/8/2004 MIN NOM MAX 1.75 1.35 0.25 0.10 1.25 1.65 0.31 0.51 0.17 0.25 4.90 BSC 6.00 BSC 3.90 BSC 1.27 BSC 0.40 1.27 1.04 REF 0.25 BSC 0º 8º 5º 15º c BASE METAL CONTACT AREA PACKAGE: 8 PIN NSOIC SPX3819 500mA, Low Noise LDO Voltage Regulator 9 © Copyright 2004 Sipex Corporation PACKAGE: 8 PIN DFN Top View Bottom View D D2 D/2 1 2 E/2 E E2 K L Pin 1 identifier to be located within this shaded area. Terminal #1 Index Area (D/2 * E/2) 2x3 8 Pin DFN JEDEC mo-229C (VCED-2) Variation Side View A b e A1 A3 Dimensions in (mm) Symbol MIN NOM MAX A 0.80 0.90 1.00 A1 0 0.02 0.05 A3 - 0.20 - 0.25 0.30 b 0.18 2.00 BSC D D2 e 1.50 - E E2 - 1.75 0.50 - 3.00 BSC 1.60 - 1.90 0.50 K 0.20 - L 0.30 0.40 2x3 8 Pin DFN Date:6/8/2004 SPX3819 500mA, Low Noise LDO Voltage Regulator 10 © Copyright 2004 Sipex Corporation PACKAGE: 5 PIN SOT-23 D e1 N N/2 +1 H E/2 E1/2 B E E1 B 1 2 SEE VIEW C N/2 e Ø1 b Dimensions in (mm) Gauge Plane 5 PIN SOT-23 JEDEC MO-178 (AA) Variation MIN NOM MAX A - - 1.45 A1 0 - 0.15 A2 0.90 b 0.30 - 0.50 c 0.08 - 0.22 1.15 Seating Plane 4X Ø1 L L1 VIEW C 1.30 A2 A A1 D 2.90 BSC e 0.95 BSC e1 1.90 BSC E 2.80 BSC E1 1.60 BSC L 0.30 0.45 L1 0.60 REF L2 0.25 BSC Ø L2 SIDE VIEW b WITH PLATING 0.60 Ø 0º 4º 8º Ø1 5º 10º 15º c BASE METAL 5 PIN SOT-23 Date:6/8/2004 SPX3819 500mA, Low Noise LDO Voltage Regulator 11 © Copyright 2004 Sipex Corporation ORDERING INFORMATION PART NUMBERS TOP MARK PACKAGE TYPE SPX3819S-1.8........ .................................................3819S18YYWW............................................8 Pin nSOIC SPX3819S-1.8/TR.....................................................3819S18YYWW......................... .. ..............8 Pin nSOIC SPX3819S-2.5 ......... ...............................................3819S25YYWW ......................................... 8 Pin nSOIC SPX3819S-2.5/TR ....................................................3819S25YYWW ......................................... 8 Pin nSOIC SPX3819S-3.0........... ..............................................3819S30YYWW ......................................... 8 Pin nSOIC SPX3819S-3.0/TR.....................................................3819S30YYWW ......................................... 8 Pin nSOIC SPX3819S-3.3............. ............................................3819S33YYWW ......................................... 8 Pin nSOIC SPX3819S-3.3/TR.....................................................3819S33YYWW ......................................... 8 Pin nSOIC SPX3819S-5.0............... ....................................... ..3819S50YYWW ......................................... 8 Pin nSOIC SPX3819S-5.0/TR.................................................. ..3819S50YYWW ......................................... 8 Pin nSOIC SPX3819S....................... ........................................3819SYYWW.................................................8 Pin nSOIC SPX3819S/TR................ ..........................................3819SYYWW.................................................8 Pin nSOIC SPX3819R2-1.2.........................................................3819S12YWW.............................. .. ..............8 Pin DFN SPX3819R2-1.2/TR..... ............................................3819S12YWW.............................. .. ..............8 Pin DFN SPX3819M5...............................................................G1WW ..................................................... 5 Pin SOT-23 SPX3819M5/TR.........................................................G1WW ..................................................... 5 Pin SOT-23 SPX3819M5-1.2........................................................ TBD ........................................................ 5 Pin SOT-23 SPX3819M5-1.2/TR............................................. .... TBD ........................................................ 5 Pin SOT-23 SPX3819M5-1.5...........................................................TBD ....................................................... 5 Pin SOT-23 SPX3819M5-1.5/TR................................................ ....TBD ....................................................... 5 Pin SOT-23 SPX3819M5-1.8..................................................... ..G3WW ..................................................... 5 Pin SOT-23 SPX3819M5-1.8/TR...................................................G3WW ..................................................... 5 Pin SOT-23 SPX3819M5-2.5 ........................................................H3WW ..................................................... 5 Pin SOT-23 SPX3819M5-2.5/TR ..................................................H3WW ..................................................... 5 Pin SOT-23 SPX3819M5-3.0........................................................J3WW .................................................. 5 Pin SOT-23 SPX3819M5-3.0/TR..................................................J3WW .................................................. 5 Pin SOT-23 SPX3819M5-3.1........................................................K3WW ...................................................... 5 Pin SOT-23 SPX3819M5-3.1/TR..................................................K3WW ...................................................... 5 Pin SOT-23 SPX3819M5-3.3.........................................................L3WW ...................................................... 5 Pin SOT-23 SPX3819M5-3.3/TR................. ..................................L3WW ..................................................... 5 Pin SOT-23 SPX3819M5-5.0.........................................................M3WW ..................................................... 5 Pin SOT-23 SPX3819M5-5.0/TR...................................................M3WW ..................................................... 5 Pin SOT-23 Available in lead free packaging. To order add "-L" suffix to part number. Example: SPX3819M5-5.0/TR = standard; SPX3819M5-L-5.0/TR = lead free /TR = Tape and Reel Pack quantity is 2500 for SOT-23 or NSOIC and 3000 for DFN . Sipex Corporation Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 ANALOG EXCELLENCE 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. Date:6/8/2004 SPX3819 500mA, Low Noise LDO Voltage Regulator 12 © Copyright 2004 Sipex Corporation