ADP3338 High Accuracy, Ultralow IQ, 1 A, anyCAP …

1 high accuracy , Ultralow IQ, 1 A, anyCAP Low Dropout Regulator ADP3338 . FEATURES FUNCTIONAL BLOCK DIAGRAM. high accuracy over line and load: @ 25 C, Q1. over temperature IN OUT. Ultralow dropout voltage: 190 mV (typ) @ 1 A ADP3338 R1. THERMAL. PROTECTION. Requires only CO = F for stability CC. anyCAP is stable with any type of capacitor (including MLCC). DRIVER gm Current and thermal limiting R2. Low noise BANDGAP. V to 8 V supply range REF. 02050-001. 40 C to +85 C ambient temperature range SOT-223 package GND. Figure 1. APPLICATIONS. Notebook, palmtop computers ADP3338 . SCSI terminators VIN IN OUT VOUT. Battery-powered systems 1 F. GND. 1 F. 02050-002. Bar code scanners Camcorders, cameras Home entertainment systems Figure 2. Typical Application Circuit Networking systems DSP/ASIC supplies GENERAL DESCRIPTION. The ADP3338 is a member of the ADP33xx family of precision, with any good quality capacitor, including ceramic (MLCC).

2 Low dropout (LDO), anyCAP voltage regulators. The ADP3338 types for space-restricted applications. The ADP3338 achieves operates with an input voltage range of V to 8 V and delivers exceptional accuracy of at room temperature and a load current up to 1 A. The ADP3338 stands out from over temperature, line, and load variations. The dropout voltage conventional LDOs with a novel architecture and an enhanced of the ADP3338 is only 190 mV (typical) at 1 A. The device also process that offers performance advantages and higher output includes a safety current limit and thermal overload protection. current than its competition. Its patented design requires only a The ADP3338 has Ultralow quiescent current: 110 A (typical). 1 F output capacitor for stability. This device is insensitive to in light load situations. output capacitor equivalent series resistance (ESR), and is stable Rev.

3 B. 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. Specifications subject to change without notice. No license is granted by implication One Technology Way, Box 9106, Norwood, MA 02062-9106, or otherwise under any patent or patent rights of analog devices . Trademarks and Tel: registered trademarks are the property of their respective owners. Fax: 2005 analog devices , Inc. All rights reserved. ADP3338 . TABLE OF CONTENTS. 3 Capacitor Selection .. 10. Absolute Maximum 4 Output Current Limit .. 10. ESD 4 Thermal Overload Protection .. 10. Pin Configuration and Function 5 Calculating Power Dissipation .. 10. Typical Performance Characteristics.

4 6 Printed Circuit Board Layout Considerations .. 10. Theory of Operation .. 9 Outline Dimensions .. 12. Application 10 Ordering Guide .. 13. REVISION HISTORY. 6/05 Data Sheet Changed from Rev. A to Rev. B. Added Pin Function Descriptions Table .. 5. Changes to Ordering Guide .. 13. 6/04 Data Sheet Changed from Rev. 0 to Rev. A. Updated Changes to Figures 5, 11, 12, 13, 14, 15 .. 6. Updated Outline Dimensions .. 12. Changes to Ordering Guide .. 12. 6/01 Rev. 0: Initial Version Rev. B | Page 2 of 16. ADP3338 . SPECIFICATIONS. VIN = V, CIN = COUT = 1 F, TJ = 40 C to +125 C, unless otherwise noted. Table 1. Parameter1, 2, 3 Symbol Conditions Min Typ Max Unit OUTPUT. Voltage accuracy VOUT VIN = VOUTNOM + V to 8 V, IL = mA to 1 A, TJ = 25 C + %. VIN = VOUTNOM + V to 8 V, IL = mA to 1 A, TJ = 40 C to +125 C + %. VIN = VOUTNOM + V to 8 V, IL = 50 mA to 1 A, TJ = 150 C + %.

5 Line Regulation VIN = VOUTNOM + V to 8 V, TJ = 25 C mV/V. Load Regulation IL = mA to 1 A, TJ = 25 C mV/mA. Dropout Voltage VDROP VOUT = 98% of VOUTNOM. IL = 1 A 190 400 mV. IL = 500 mA 125 200 mV. IL = 100 mA 70 150 mV. Peak Load Current ILDPK VIN = VOUTNOM + 1 V A. Output Noise VNOISE f = 10 Hz to 100 kHz, CL = 10 F, IL = 1 A 95 V rms GROUND CURRENT. In Regulation IGND IL = 1 A 9 30 mA. IL = 500 mA 15 mA. IL = 100 mA 3 mA. IL = mA 110 190 A. In Dropout IGND VIN = VOUTNOM 100 mV, IL = mA 190 600 A. 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 = V for models with VOUTNOM V. Rev. B | Page 3 of 16. ADP3338 . ABSOLUTE MAXIMUM RATINGS. Unless otherwise specified, all voltages are referenced to GND. Stresses above those listed under Absolute Maximum Ratings Table 2.

6 May cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any Parameter Rating other conditions above those indicated in the operational Input Supply Voltage V to + V. section of this specification is not implied. Exposure to absolute Power Dissipation Internally limited maximum rating conditions for extended periods may affect Operating Ambient Temperature Range 40 C to +85 C. device reliability. Operating Junction Temperature Range 40 C to +150 C. JA C/W Only one absolute maximum rating may be applied at any one JC C/W time. Storage Temperature Range 65 C to +150 C. Lead Temperature (Soldering 10 sec) 300 C. Vapor Phase (60 sec) 215 C. Infrared (15 sec) 220 C. ESD 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.

7 Although this product 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. Rev. B | Page 4 of 16. ADP3338 . PIN CONFIGURATION AND FUNCTION DESCRIPTIONS. 3 IN. ADP3338 . OUT 2 TOP VIEW 2 OUT. (Not to Scale). 02050-003. 1 GND. NOTE: PIN 2 AND TAB ARE INTERNALLY CONNECTED. Figure 3. Pin Configuration Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1 GND Ground Pin. 2 OUT Regulator Output. Bypass to ground with a 1 F or larger capacitor. 3 IN Regulator Input. Bypass to ground with a 1 F or larger capacitor. Rev. B | Page 5 of 16. ADP3338 . TYPICAL PERFORMANCE CHARACTERISTICS. TA = 25 C, unless otherwise noted. 12. VOUT = VOUT = VIN = 6V.

8 10. IL = 0A. GROUND CURRENT (mA). OUTPUT VOLTAGE (V). 8. IL = 6. IL = 1A. 4. 2. 0. 02050-007. 02050-004. 0 INPUT VOLTAGE (V) OUTPUT LOAD (A). Figure 4. Line Regulation Output Voltage vs. Input Voltage Figure 7. Ground Current vs. Load Current VIN = 6V VOUT = VIN = 6V. IL = 1A. IL = OUTPUT VOLTAGE (%). OUTPUT VOLTAGE (V). IL = IL = IL = 0A. 0. 02050-008. 02050-005. 40 20 0 20 40 60 80 100 120. 0 JUNCTION TEMPERATURE ( C). LOAD CURRENT (A). Figure 5. Output Voltage vs. Load Current Figure 8. Output Voltage Variation % vs. Junction Temperature 300 18. VOUT = ILOAD = 1A. ILOAD = 0A 16. 250. 14. ILOAD = 700mA. GROUND CURRENT (mA). GROUND CURRENT ( A). 200 12. ILOAD = 500mA. 10. ILOAD = 300mA. 150. 8. 100 6. 4. 50. 2. 02050-009. 0 0. 02050-006. 0 2 4 6 8 40 20 0 20 40 60 80 100 120 140 160. JUNCTION TEMPERATURE ( C). INPUT VOLTAGE (V).

9 Figure 6. Ground Current vs. Supply Voltage Figure 9. Ground Current vs. Junction Temperature Rev. B | Page 6 of 16. ADP3338 . 250. VOUT = VOUT = COUT = 10 F. ILOAD = 1A. 200. DROPOUT (mV). 150. VOLTS. 100. 50. 02050-013. 02050-010. 0 40 80 120 160 200 240. 0 TIME ( s). LOAD CURRENT (A). Figure 10. Dropout Voltage vs. Load Current Figure 13. Line Transient Response VOUT = VIN = 6V. ILOAD = 1A COUT = 1 F. 3 VOLTS. INPUT/OUTPUT VOLTAGE (V). 2 1 1. A. 0 0. 02050-011. 02050-014. 0 1 2 3 4 5 6 7 8 9 10 0 200 400 600 800 1000. TIME (sec) TIME ( s). Figure 11. Power-Up/Power-Down Figure 14. Load Transient Response VOUT = VIN = 6V. COUT = 10 F. COUT = 1 F ILOAD = 1A. VOLTS. VOLTS. 1. A. 0. 02050-012. 02050-015. 40 80 120 160 200 240 0 200 400 600 800 1000. TIME ( s) TIME ( s). Figure 12. Line Transient Response Figure 15. Load Transient Response Rev.

10 B | Page 7 of 16. ADP3338 . 300. VOLTS. 250. 0. 400m 200. RMS NOISE ( V). SHORT FULL SHORT. 150. VIN = 6V. A. IL = 1A. 100. 0 50. IL = 0A. 02050-016. 0. 02050-018. 0 10 20 30 40 50. TIME (s). CL ( F). Figure 16. Short-Circuit Current Figure 18. RMS Noise vs. CL. 0 100. VOLTAGE NOISE SPECTRAL DENSITY ( V/ Hz). VOUT = 10. 20 CL = 1 F 10. IL = 1A. RIPPLE REJECTION (dB). 30 CL = 10 F. IL = 1A. 40 1. CL = 1 F. 50. 60 CL = 10 F. 70. 80 CL = 10 F. CL = 1 F IL = 0. 90. IL = 0. 02050-019. 100. 02050-017. 10 100 1k 10k 100k 1M 10 100 1k 10k 100k 1M. FREQUENCY (Hz) FREQUENCY (Hz). Figure 17. Power Supply Ripple Rejection Figure 19. Output Noise Density (10 Hz to 100 kHz). Rev. B | Page 8 of 16. ADP3338 . THEORY OF OPERATION. The ADP3338 anyCAP LDO uses a single control loop for include the load capacitor in a pole-splitting arrangement to regulation and reference functions.