High-Accuracy Ultralow IQ/ 1.5 A/ anyCAP Low Dropout Regulator

a High-Accuracy Ultralow IQ, 1.5 A, anyCAP® Low Dropout Regulator ADP3339 FUNCTIONAL BLOCK DIAGRAM IN THERMAL PROTECTION Q1 R1 CC gm R2 OUT FEATURES High Accuracy Over Line and Load: 0.9% @ 25 C, 1.5% Over Temperature Ultralow Dropout Voltage: 230 mV (Typ) @ 1.5 A Requires Only CO = 1.0 F for Stability anyCAP = Stable with Any Type of Capacitor (Including MLCC) Current and Thermal Limiting Low Noise 2.8 V to 6 V Supply Range –40 C to +85 C Ambient Temperature Range SOT-223 Package APPLICATIONS Notebook, Palmtop Computers SCSI Terminators Battery-Powered Systems PCMCIA Regulator Bar Code Scanners Camcorders, Cameras DRIVER ADP3339 BANDGAP REF GND GENERAL DESCRIPTION The ADP3339 is a member of the ADP33xx family of precision low dropout anyCAP voltage regulators. The ADP3339 operates with an input voltage range of 2.8 V to 6 V and delivers a load current up to 1.5 A. The ADP3339 stands out from the conventional LDOs with a novel architecture and an enhanced process that enables it to offer performance advantages and higher output current than its competition. Its patented design requires only a 1.0 µF output capacitor for stability. This device is insensitive to output capacitor Equivalent Series Resistance (ESR), and is stable with any good quality capacitor, including ceramic (MLCC) types for space-restricted applications. The ADP3339 achieves exceptional accuracy of ± 0.9% at room temperature and ± 1.5% over temperature, line and load variations. The dropout voltage of the ADP3339 is only 230 mV (typical) at 1.5 A. This device also includes a safety current limit and thermal overload protection. The ADP3339 has ultralow quiescent current 130 µA (typical) in light load situations. ADP3339 VIN 1 F IN GND OUT 1 F VOUT Figure 1. Typical Application Circuit anyCAP is a registered trademark of Analog Devices Inc. REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2001 ADP3339–SPECIFICATIONS1, 2 (V Parameter OUTPUT Voltage Accuracy3 Symbol VOUT Conditions IN = 6.0 V, CIN = COUT = 1 F, TJ = –40 C to +125 C unless otherwise noted) Min –0.9 Typ Max +0.9 Unit % Line Regulation3 Load Regulation Dropout Voltage VDROP Peak Load Current Output Noise GROUND CURRENT In Regulation ILDPK VNOISE VIN = VOUTNOM + 0.5 V to 6 V IL = 0.1 mA to 1.5 A TJ = 25°C VIN = VOUTNOM + 0.5 V to 6 V IL = 0.1 mA to 1.5 A TJ = –40°C to +125°C VIN = VOUTNOM + 0.5 V to 6 V IL = 100 mA to 1.5 A TJ = 150°C VIN = VOUTNOM + 0.5 V to 6 V TJ = 25°C IL = 0.1 mA to 1.5 A TJ = 25°C VOUT = 98% of VOUTNOM IL = 1.5 A IL = 1 A IL = 500 mA IL = 100 mA VIN = VOUTNOM + 1 V f = 10 Hz–100 kHz, CL = 10 µF IL = 1.5 A IL = 1.5 A IL = 1 A IL = 500 mA IL = 100 mA IL = 0.1 mA VIN = VOUTNOM – 100 mV IL = 0.1 mA –1.5 +1.5 % –1.9 +1.9 % 0.04 0.04 mV/V mV/mA 230 180 150 100 2.0 95 480 380 300 mV mV mV mV A µV rms IGND In Dropout IGND 13 9 5 1 130 100 40 25 15 3 200 300 mA mA mA mA µA µA NOTES 1 All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. 2 Application stable with no load. 3 VIN = 2.8 V for models with V OUTNOM ≤ 2.3 V. Specifications subject to change without notice. –2– REV. 0 ADP3339 ABSOLUTE MAXIMUM RATINGS* PIN FUNCTION DESCRIPTIONS Input Supply Voltage . . . . . . . . . . . . . . . . . . . –0.3 V to +8.5 V Power Dissipation . . . . . . . . . . . . . . . . . . . . Internally Limited Operating Ambient Temperature Range . . . . –40°C to +85°C Operating Junction Temperature Range . . . –40°C to +150°C θJA Four-Layer Board . . . . . . . . . . . . . . . . . . . . . . . . 62.3°C/W θJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26.8°C/W Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C Lead Temperature Range (Soldering 10 sec) . . . . . . . . . 300°C Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . 215°C Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C *This is a stress rating only; operation beyond these limits can cause the device to be permanently damaged. Unless otherwise specified, all voltages are referenced to GND. Pin No. 1 2 3 Mnemonic GND OUT IN Function Ground Pin. Output of the Regulator. Bypass to ground with a 1 µF or larger capacitor. Regulator Input. Bypass to ground with a 1 µF or larger capacitor. PIN CONFIGURATION OUT TOP VIEW 2 OUT (Not to Scale) 1 GND ADP3339 3 IN NOTE PIN 2 AND TAB ARE INTERNALLY CONNECTED ORDERING GUIDE Model ADP3339AKC-1.8 ADP3339AKC-2.5 ADP3339AKC-2.85 ADP3339AKC-3.3 ADP3339AKC-5 Output Voltage* 1.8 V 2.5 V 2.85 V 3.3 V 5V Package Option KC (SOT-223) KC (SOT-223) KC (SOT-223) KC (SOT-223) KC (SOT-223) Package Description Plastic Surface Mount Plastic Surface Mount Plastic Surface Mount Plastic Surface Mount Plastic Surface Mount *Contact the factory for other voltage options. CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADP3339 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. WARNING! ESD SENSITIVE DEVICE REV. 0 –3– ADP3339–Typical Performance Characteristics (T = 25 C unless otherwise noted.) A 3.301 3.300 VOUT = 3.3V ILOAD = 0A 3.301 VIN = 6V 3.300 3.299 3.298 3.297 3.296 3.295 3.294 GROUND CURRENT – A 180 160 140 120 100 80 60 40 20 0 0.5 1.0 LOAD CURRENT – A 1.5 0 0 2 4 6 8 SUPPLY VOLTAGE – V 10 12 VOUT = 3.3V ILOAD = 0A OUTPUT VOLTAGE – V 3.299 3.298 ILOAD = 500mA 3.297 3.296 3.295 3.294 3.293 3 ILOAD = 1.5A ILOAD = 1A 4 5 6 SUPPLY VOLTAGE – V 7 TPC 1. Output Voltage vs. Supply Voltage OUTPUT VOLTAGE – V TPC 2. Output Voltage vs. Load Current TPC 3. Ground Current vs. Supply Voltage 14 12 VIN = 6V VOUT = 3.0V OUTPUT VOLTAGE – % 1.0 0.8 VIN = 6V VOUT = 3.3V GROUND CURRENT – mA 25 VOUT = 3.3V 20 ILOAD = 1.5A 15 ILOAD = 1A ILOAD = 0.5A 10 GROUND CURRENT – mA 10 8 6 4 2 0 0.6 ILOAD = 1A 0.4 ILOAD = 10mA ILOAD = 500mA 0.2 0 ILOAD = 1.5A 0 0.5 1.0 LOAD CURRENT – A 1.5 –0.2 –40 –20 0 20 40 60 80 100 120 140 5 ILOAD = 1mA 0 –40 110 10 60 JUNCTION TEMPERATURE – C 160 JUNCTION TEMPERATURE – C TPC 4. Ground Current vs. Load Current TPC 5. Output Voltage Variation % vs. Junction Temperature TPC 6. Ground Current vs. Junction Temperature 250 VOUT = 3.3V INPUT/OUTPUT VOLTAGE – V VOUT = 3.3V ILOAD = 1.5A 200 DROPOUT – mV 3.31V 3.30V 150 3 2 1 0 3.29V VOUT = 3.3V ILOAD = 1.5A COUT = 1 F 100 5V 4V 1 2 3 4 5 6 7 8 9 10 50 0 40 80 0 0.2 0.4 0.6 0.8 1.0 1.2 LOAD CURRENT – mA 1.4 TIME – s 120 140 TIME – s 180 220 TPC 7. Dropout Voltage vs. Load Current TPC 8. Power-Up/Power-Down TPC 9. Line Transient Response –4– REV. 0 ADP3339 3.31V 3.30V 3.29V VOUT = 3.3V ILOAD = 1.5A COUT = 10 F 3.5V 3.3V 3.1V 1.5A 1.0A 5V 4V 40 80 120 140 TIME – s 180 220 0.5A 0 0 200 400 600 TIME – s 800 1000 VIN = 6V COUT = 10 F ILOAD = 1.5A 3.5V 3.3V 3.1V 1.5A 1.0A 0.5A 0 0 200 400 600 TIME – s 800 1000 VIN = 6V COUT = 1 F ILOAD = 1.5A TPC 10. Line Transient Response TPC 11. Load Transient Response TPC 12. Load Transient Response 0 –10 RIPPLE REJECTION – dB 3.3V 0 VIN = 6V VOUT = 3.3V 600 500 –20 –30 –40 –50 –60 –70 –80 –90 CL = 1 F ILOAD = 0A RMS NOISE – V CL = 1 F ILOAD = 1.5A CL = 10 F ILOAD = 1.5A 400 3A 2A 1A 0 200 400 600 TIME – s 800 300 200 ILOAD = 1.5A CL = 10 F ILOAD = 0A 100 ILOAD = 0A 0 0 10 20 CL – 30 F 40 50 –100 10 100 1k 10k 100k 1M START 10.000Hz STOP 100,000.000Hz FREQUENCY – Hz TPC 13. Short-Circuit Current TPC 14. Power Supply Ripple Rejection TPC 15. RMS Noise vs. CL (10 Hz–100 kHz) 100 VOLTAGE NOISE SPECTRAL DENSITY 10 V/ Hz 1 CL = 1 F 0.1 CL = 10 F – 0.01 0.001 10 100 1k 10k 100k FREQUENCY – Hz 1M TPC 16. Output Noise Density REV. 0 –5– ADP3339 THEORY OF OPERATION The new anyCAP LDO ADP3339 uses a single control loop for regulation and reference functions. The output voltage is sensed by a resistive voltage divider consisting of R1 and R2 which is varied to provide the available output voltage option. Feedback is taken from this network by way of a series diode (D1) and a second resistor divider (R3 and R4) to the input of an amplifier. INPUT Q1 COMPENSATION CAPACITOR PTAT VOS R4 OUTPUT superior line noise rejection and very high regulator gain, which leads to excellent line and load regulation. An impressive ± 1.5 accuracy is guaranteed over line, load, and temperature. Additional features of the circuit include current limit and thermal shutdown. VIN C1 1 F IN OUT GND C2 1 F VOUT ATTENUATION (VBANDGAP/VOUT) R3 D1 R1 ADP3339 (a) CLOAD RLOAD R2 NONINVERTING WIDEBAND DRIVER gm PTAT CURRENT Figure 3. Typical Application Circuit APPLICATION INFORMATION CAPACITOR SELECTION Output Capacitor ADP3339 GND Figure 2. Functional Block Diagram A very high-gain error amplifier is used to control this loop. The amplifier is constructed in such a way that equilibrium produces a large, temperature-proportional input, “offset voltage” that is repeatable and very well controlled. The temperatureproportional offset voltage is combined with the complementary diode voltage to form a