Wide input voltage range: 4 V to 28 V Maximum output current: 50 mA Low light load current 28 µA at 0 µA load 35 µA at 100 µA load Low shutdown current: 0.7 µA Low dropout voltage: 275 mV @ 50 mA load Initial accuracy: ±0.5% Accuracy over line, load, and temperature: ±2% Stable with small 1 µF ceramic output capacitor Fixed 3.3 V and 5.0 V output voltage options Adjustable output voltage option: 1.225 V to 5.0 V Current limit and thermal overload protection Logic controlled enable Space-saving MSOP package ENHANCED PRODUCT FEATURES Enhanced processing (EP) for −55°C to +125°C operation TYPICAL APPLICATION CIRCUITS ADP1720-EP FIXED VIN = 28V 1µF 1 GND GND 8 2 IN GND 7 3 OUT GND 6 4 EN GND 5 VOUT = 5V 09723-001 FEATURES 1µF Figure 1. ADP1720-EP with Fixed Output Voltage, 5.0 V ADP1720-EP R2 R1 VIN = 12V 1µF VOUT = 1.225V(1 + R1/R2) 1µF ADJUSTABLE 1 ADJ GND 8 2 IN GND 7 3 OUT GND 6 4 EN GND 5 09723-002 Data Sheet 50 mA, High Voltage, Micropower Linear Regulator ADP1720-EP Figure 2. ADP1720-EP with Adjustable Output Voltage, 1.225 V to 5.0 V APPLICATIONS DC-to-dc post regulation PCMCIA regulation Keep-alive power in portable equipment Industrial applications Aeronautic and military operating temperature environment GENERAL DESCRIPTION The ADP1720-EP is a high voltage, micropower, low dropout linear regulator. Operating over a very wide input voltage range of 4 V to 28 V, the ADP1720-EP can provide up to 50 mA of output current. With just 28 µA of quiescent supply current and a micropower shutdown mode, this device is ideal for applications that require low quiescent current. The ADP1720-EP is optimized for stable operation with small 1 µF ceramic output capacitors, allowing for good transient performance while occupying minimal board space. The ADP1720-EP is available in fixed output voltages of 3.3 V and 5.0 V. An adjustable version is also available, which allows the output to be set anywhere between 1.225 V and 5.0 V. An enable function that allows external circuits to turn on and turn off the ADP1720 output is available. For automatic startup, the enable (EN) pin can be connected directly to the input rail. Available in a small MSOP package, the ADP1720-EP provides a compact solution with low thermal resistance. The ADP1720-EP operates from –55°C to +125°C and uses current limit protection and thermal overload protection circuits to prevent damage to the device in adverse conditions. Additional application and technical information can be found in the ADP1720 data sheet. Rev. A 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 or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2011–2012 Analog Devices, Inc. All rights reserved. ADP1720-EP Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Thermal Resistance .......................................................................5 Enhanced Product Features ............................................................ 1 ESD Caution...................................................................................5 Applications ....................................................................................... 1 Pin Configurations and Function Descriptions ............................6 Typical Application Circuits............................................................ 1 Typical Performance Characteristics ..............................................7 General Description ......................................................................... 1 Applications Information .............................................................. 10 Revision History ............................................................................... 2 Thermal Considerations............................................................ 10 Specifications..................................................................................... 3 Outline Dimensions ....................................................................... 12 Absolute Maximum Ratings ............................................................ 5 Ordering Guide .......................................................................... 12 REVISION HISTORY 6/12—Rev. 0 to Rev. A Changes to Ordering Guide .......................................................... 12 2/11—Revision 0: Initial Version Rev. A | Page 2 of 12 Data Sheet ADP1720-EP SPECIFICATIONS VIN = 12 V, IOUT = 100 µA, CIN = COUT = 1 µF, TA = 25°C, unless otherwise noted. Table 1. Parameter INPUT VOLTAGE RANGE OPERATING SUPPLY CURRENT SHUTDOWN CURRENT Symbol VIN IGND IGND-SD OUTPUT Fixed Output Voltage Accuracy VOUT Adjustable Output 1 Voltage Accuracy VOUT Noise (10 Hz to 100 kHz) OUTNOISE REGULATION Line Regulation Load Regulation 2 DROPOUT VOLTAGE ∆VOUT/∆VIN ∆VOUT/∆IOUT 3 START-UP TIME 4 CURRENT LIMIT THRESHOLD 5 THERMAL CHARACTERISTICS Thermal Shutdown Threshold Thermal Shutdown Hysteresis EN CHARACTERISTICS EN Input Logic High Logic Low Leakage Current ADJ INPUT BIAS CURRENT (ADP1720-EP ADJUSTABLE) VDROPOUT Conditions TJ = –55°C to +125°C IOUT = 0 µA IOUT = 0 µA, VIN = VOUT + 0.5 V or 4 V (whichever is greater), TJ = –55°C to +125°C IOUT = 100 µA IOUT = 100 µA, VIN = VOUT + 0.5 V or 4 V (whichever is greater), TJ = –55°C to +125°C IOUT = 1 mA IOUT = 1 mA, VIN = VOUT + 0.5 V or 4 V (whichever is greater), TJ = –55°C to +125°C IOUT = 10 mA IOUT = 10 mA, VIN = VOUT + 0.5 V or 4 V (whichever is greater), TJ = –55°C to +125°C 100 µA < IOUT < 50 mA, VIN = VOUT + 0.5 V or 4 V (whichever is greater), TJ = –55°C to +125°C EN = GND EN = GND, TJ = –55°C to +125°C Min 4 IOUT = 100 µA 100 µA < IOUT < 50 mA 100 µA < IOUT < 50 mA, TJ = –55°C to +125°C IOUT = 100 µA 100 µA < IOUT < 50 mA 100 µA < IOUT < 50 mA, TJ = –55°C to +125°C VOUT = 1.6 V, COUT = 1 µF VOUT = 1.6 V, COUT = 10 µF VOUT = 5 V, COUT = 1 µF VOUT = 5 V, COUT = 10 µF –0.5 –1 –2 1.2188 1.2127 1.2005 VIN = (VOUT + 0.5 V) to 28 V, TJ = –55°C to +125°C 1 mA < IOUT < 50 mA 1 mA < IOUT < 50 mA, TJ = –55°C to +125°C IOUT = 10 mA IOUT = 10 mA, TJ = –55°C to +125°C IOUT = 50 mA IOUT = 50 mA, TJ = –55°C to +125°C –0.02 tSTART-UP ILIMIT TSSD Rev. A | Page 3 of 12 120 µA µA 340 µA µA 900 µA µA 2115 µA 1.7 µA µA 74 300 1185 0.7 1.2250 +0.5 +1 +2 1.2311 1.2372 1.2495 % % % V V V µV rms µV rms µV rms µV rms +0.02 %/V %/mA %/mA mV mV mV mV µs mA 146 124 340 266 0.001 0.005 55 105 275 480 TJ rising ADJI-BIAS 80 Unit V µA µA 35 55 4 V ≤ VIN ≤ 28 V 4 V ≤ VIN ≤ 28 V EN = GND EN = IN Max 28 28 TSSD-HYS VIH VIL VI-LEAKAGE Typ 200 90 140 150 °C 15 °C 1.8 0.1 0.5 30 0.4 1 1 100 V V µA µA nA ADP1720-EP Parameter POWER SUPPLY REJECTION RATIO Data Sheet Symbol PSRR Conditions f = 120 Hz, VIN = 8 V, VOUT = 1.6 V f = 1 kHz, VIN = 8 V, VOUT = 1.6 V f = 10 kHz, VIN = 8 V, VOUT = 1.6 V f = 120 Hz, VIN = 8 V, VOUT = 5 V f = 1 kHz, VIN = 8 V, VOUT = 5 V f = 10 kHz, VIN = 8 V, VOUT = 5 V 1 Min Typ –90 –80 –60 –83 –70 –50 Max Unit dB dB dB dB dB dB Accuracy when OUT is connected directly to ADJ. When OUT voltage is set by external feedback resistors, absolute accuracy in adjust mode depends on the tolerances of resistors used. Based on an end-point calculation using 1 mA and 50 mA loads. See Figure 6 for typical load regulation performance for loads less than 1 mA. 3 Dropout voltage is defined as the input-to-output voltage differential when the input voltage is set to the nominal output voltage. This applies only for output voltages above 4 V. 4 Start-up time is defined as the time between the rising edge of EN to OUT being at 95% of its nominal value. 5 Current limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value. For example, the current limit for a 5.0 V output voltage is defined as the current that causes the output voltage to drop to 90% of 5.0 V, or 4.5 V. 2 Rev. A | Page 4 of 12 Data Sheet ADP1720-EP ABSOLUTE MAXIMUM RATINGS Table 2. Parameter IN to GND OUT to GND EN to GND ADJ to GND Storage Temperature Range Operating Junction Temperature Range Soldering Conditions THERMAL RESISTANCE Rating –0.3 V to +30 V –0.3 V to IN or +6 V (whichever is less) –0.3 V to +30 V –0.3 V to +6 V –65°C to +150°C –55°C to +125°C θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Table 3. Thermal Resistance Package Type 8-Lead MSOP ESD CAUTION JEDEC J-STD-020 Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Rev. A | Page 5 of 12 θJA 246 θJC 66 Unit °C/W ADP1720-EP Data Sheet PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS ADP1720-EP ADP1720-EP IN 2 OUT 3 TOP VIEW (Not to Scale) EN 4 8 GND ADJ 1 7 GND IN 2 6 GND OUT 3 5 GND 09723-003 GND 1 EN 4 Figure 3. 8-Lead MSOP Pin Configuration—Fixed Output Voltage TOP VIEW (Not to Scale) 8 GND 7 GND 6 GND 5 GND 09723-004 ADJUSTABLE FIXED Figure 4. 8-Lead MSOP Pin Configuration—Adjustable Output Voltage Table 4. Pin Function Descriptions Fixed 1 N/A 2 3 4 5 6 7 8 Pin No. Adjustable N/A 1 2 3 4 5 6 7 8 Mnemonic GND ADJ IN OUT EN GND GND GND GND Description This pin is internally connected to ground. Adjust. A resistor divider from OUT to ADJ sets the output voltage. Regulator Input Supply. Bypass IN to GND with a 1 µF or greater capacitor. Regulated Output Voltage. Bypass OUT to GND with a 1 µF or greater capacitor. Enable Input. Drive EN high to turn on the regulator; drive it low to turn off the regulator. For automatic startup, connect EN to IN. Ground. Ground. Ground. Ground. Rev. A | Page 6 of 12 Data Sheet ADP1720-EP TYPICAL PERFORMANCE CHARACTERISTICS 1200 5.02 1000 5.01 800 IGND (µA) 5.03 5.00 4.98 4.97 –60 –30 = 10µA = 100µA = 1mA = 10mA = 25mA = 50mA ILOAD = 1mA ILOAD = 100µA ILOAD = 10µA 400 200 0 30 60 90 JUNCTION TEMPERATURE (°C) 0 –60 120 09723-008 ILOAD ILOAD ILOAD ILOAD ILOAD ILOAD 4.99 ILOAD = 50mA ILOAD = 25mA ILOAD = 10mA 600 09723-005 VOUT (V) VIN = 12 V, VOUT = 5 V, IOUT = 100 µA, CIN = COUT = 1 µF, TA = 25°C, unless otherwise noted. –30 0 30 60 90 JUNCTION TEMPERATURE (°C) 120 Figure 8. Ground Current vs. Junction Temperature Figure 5. Output Voltage vs. Junction Temperature 4.9925 1200 4.9920 1000 4.9915 800 IGND (µA) VOUT (V) 4.9910 4.9905 600 4.9900 400 4.9895 09723-006 4.9885 0.01 0.1 1 10 0 0.01 100 0.1 1 ILOAD (mA) Figure 6. Output Voltage vs. Load Current Figure 9. Ground Current vs. Load Current 5.010 1400 ILOAD ILOAD ILOAD ILOAD ILOAD ILOAD 5.008 5.006 5.004 = 10µA = 100µA = 1mA = 10mA = 25mA = 50mA ILOAD = 50mA ILOAD = 25mA ILOAD = 10mA 1200 ILOAD = 1mA ILOAD = 100µA ILOAD = 10µA 1000 IGND (µA) 5.002 5.000 4.998 4.996 800 600 400 4.994 4.990 0 5 10 15 20 25 VIN (V) 30 Figure 7. Output Voltage vs. Input Voltage 0 0 5 10 15 20 25 VIN (V) Figure 10. Ground Current vs. Input Voltage Rev. A | Page 7 of 12 30 09723-010 200 4.992 09723-007 VOUT (V) 100 10 ILOAD (mA) 09723-009 200 4.9890 ADP1720-EP Data Sheet 3.5 300 3.0 250 ILOAD = 50mA 200 IGND (mA) 150 2.0 ILOAD = 25mA 1.5 100 1.0 ILOAD = 10mA ILOAD = 1mA 50 0 1 10 09723-013 09723-011 0.5 0 4.9 100 5.0 5.1 ILOAD (mA) Figure 11. Dropout Voltage vs. Load Current 5.4 0 ILOAD = 1mA VIN = 8V VOUT = 1.6V COUT = 1µF VRIPPLE = 50mV –10 –20 4.95 ILOAD = 50mA –30 4.90 PSRR (dB) 1mA ILOAD = 25mA 4.85 4.80 ILOAD = 10mA –40 10mA –50 100µA –60 4.75 –70 4.70 –80 09723-012 VOUT (V) 5.3 Figure 13. Ground Current vs. Input Voltage (in Dropout) 5.05 5.00 5.2 VIN (V) 4.65 4.60 4.9 5.0 5.1 5.2 5.3 –90 –100 10 5.4 VIN (V) 100 1k 10k 100k 1M FREQUENCY (Hz) Figure 12. Output Voltage vs. Input Voltage (in Dropout) Figure 14. Power Supply Rejection Ratio vs. Frequency (1.6 V Adjustable Output) Rev. A | Page 8 of 12 10M 09723-014 VDROPOUT (mV) 2.5 Data Sheet ADP1720-EP 0 VIN = 8V VOUT = 5V COUT = 1µF VRIPPLE = 50mV –10 –20 VIN STEP FROM 6V TO 7V –30 VOUT = 5V CIN = 1µF COUT = 1µF ILOAD = 50mA 10mA –50 –60 2V/DIV 1mA 1 10mV/DIV PSRR (dB) –40 2 100µA –70 –100 10 100 1k 10k 100k 1M 09723-015 –90 VOUT 10M FREQUENCY (Hz) TIME (100µs/DIV) Figure 15. Power Supply Rejection Ratio vs. Frequency (5.0 V Fixed Output) Figure 17. Line Transient Response 5V/DIV VIN = 12V VOUT = 1.6V CIN = 1µF COUT = 1µF LOAD STEP FROM 2.5mA TO 47.5mA EN 1 VOUT 1 VIN = 12V VOUT = 5V CIN = 1µF COUT = 1µF ILOAD = 50mA 2 TIME (40µs/DIV) Figure 16. Load Transient Response Figure 18. Start-Up Time Rev. A | Page 9 of 12 09723-018 TIME (20µs/DIV) 2V/DIV VOUT 09723-016 10mV/DIV 09723-017 –80 ADP1720-EP Data Sheet APPLICATIONS INFORMATION THERMAL CONSIDERATIONS 140 MAX TJ (DO NOT OPERATE ABOVE THIS POINT) 120 JUNCTION TEMPERATURE (°C) 100 80 60 40 20 0 4 8 12 16 20 24 28 VIN – VOUT (V) θJA (°C/W) 246 216 186 178 169 Figure 19. 500 mm2 of PCB Copper, TA = 25°C 140 MAX TJ (DO NOT OPERATE ABOVE THIS POINT) TJ = TA + (PD × θJA) (3) where: TA is the ambient temperature. PD is the power dissipation in the die, given by JUNCTION TEMPERATURE (°C) 120 The junction temperature of the ADP1720-EP can be calculated from the following equation: 100 80 60 40 1mA 5mA 30mA 40mA 10mA 20mA 09723-023 20 PD = [(VIN – VOUT) × ILOAD] + (VIN × IGND) 50mA (LOAD CURRENT) 0 (4) 0 4 8 12 16 20 24 28 VIN – VOUT (V) where: ILOAD is the load current. IGND is the ground current. VIN and VOUT are input and output voltages, respectively. Figure 20. 300 mm2 of PCB Copper, TA = 25°C 140 MAX TJ (DO NOT OPERATE ABOVE THIS POINT) As shown in Equation 5, for a given ambient temperature, input-to-output voltage differential, and continuous load current, there exists a minimum copper size requirement for the PCB to ensure that the junction temperature does not rise above 125°C. Figure 19 to Figure 24 show junction temperature calculations for different ambient temperatures, load currents, VIN to VOUT differentials, and areas of PCB copper for the ADP1720-EP. Rev. A | Page 10 of 12 100 80 60 40 20 1mA 5mA 30mA 40mA 10mA 20mA 09723-024 (5) JUNCTION TEMPERATURE (°C) 120 Power dissipation due to ground current is quite small and can be ignored. Therefore, the junction temperature equation simplifies to the following: TJ = TA + {[(VIN – VOUT) × ILOAD] × θJA} 50mA (LOAD CURRENT) 0 Table 5. Typical θJA Values for ADP1720-EP Copper Size (mm2) 25 50 100 300 500 30mA 40mA 10mA 20mA 1mA 5mA 09723-022 To guarantee reliable operation, the junction temperature of the ADP1720-EP must not exceed 125°C. To ensure that the junction temperature stays below this maximum value, the user needs to be aware of the parameters that contribute to junction temperature changes. These parameters include ambient temperature, power dissipation in the power device, and thermal resistances between the junction and ambient air (θJA). The θJA number is dependent on the package assembly compounds used and the amount of copper to which the GND pins of the package are soldered on the PCB. Table 5 shows typical θJA values of the 8-lead MSOP package for various PCB copper sizes. 50mA (LOAD CURRENT) 0 0 4 8 12 16 20 24 VIN – VOUT (V) Figure 21. 100 mm2 of PCB Copper, TA = 25°C 28 Data Sheet ADP1720-EP 140 140 MAX TJ (DO NOT OPERATE ABOVE THIS POINT) MAX TJ (DO NOT OPERATE ABOVE THIS POINT) 120 JUNCTION TEMPERATURE (°C) 100 80 60 40 50mA (LOAD CURRENT) 0 0 4 8 12 16 20 24 80 60 40 20 1mA 5mA 28 0 4 8 12 16 20 24 28 VIN – VOUT (V) Figure 22. 25 mm2 of PCB Copper, TA = 25°C Figure 25. 100 mm2 of PCB Copper, TA = 50°C 140 140 MAX TJ (DO NOT OPERATE ABOVE THIS POINT) MAX TJ (DO NOT OPERATE ABOVE THIS POINT) 120 120 JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) 50mA (LOAD CURRENT) 0 VIN – VOUT (V) 100 80 60 40 1mA 5mA 30mA 40mA 10mA 20mA 50mA (LOAD CURRENT) 0 0 4 8 12 16 20 24 28 100 80 60 40 09723-027 20 50mA (LOAD CURRENT) 0 8 12 16 50mA (LOAD CURRENT) 4 8 12 16 20 24 Figure 26. 25 mm2 of PCB Copper, TA = 50°C MAX TJ (DO NOT OPERATE ABOVE THIS POINT) 4 30mA 40mA 10mA 20mA VIN – VOUT (V) 120 0 40 0 140 30mA 40mA 60 1mA 5mA Figure 23. 500 mm2 of PCB Copper, TA = 50°C 10mA 20mA 80 0 VIN – VOUT (V) 1mA 5mA 100 20 09723-026 20 JUNCTION TEMPERATURE (°C) 30mA 40mA 10mA 20mA 09723-128 30mA 40mA 10mA 20mA 1mA 5mA 09723-025 20 100 20 24 28 VIN – VOUT (V) Figure 24. 300 mm2 of PCB Copper, TA = 50°C Rev. A | Page 11 of 12 09723-029 JUNCTION TEMPERATURE (°C) 120 28 ADP1720-EP Data Sheet OUTLINE DIMENSIONS 3.20 3.00 2.80 8 3.20 3.00 2.80 1 5.15 4.90 4.65 5 4 PIN 1 IDENTIFIER 0.65 BSC 0.95 0.85 0.75 15° MAX 1.10 MAX 0.40 0.25 0.23 0.09 6° 0° 0.80 0.55 0.40 COMPLIANT TO JEDEC STANDARDS MO-187-AA 10-07-2009-B 0.15 0.05 COPLANARITY 0.10 Figure 27. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters ORDERING GUIDE Model 1 ADP1720TRMZ5-EP ADP1720TRMZ5-EP-R7 ADP1720TRMZ3.3-EP ADP1720TRMZ3.3-EPR7 ADP1720TRMZ-EP ADP1720TRMZ-EP-R7 1 Temperature Range –55°C to +125°C –55°C to +125°C –55°C to +125°C –55°C to +125°C –55°C to +125°C –55°C to +125°C Output Voltage (V) 5 5 3.3 3.3 1.225 to 5 1.225 to 5 Package Description 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP Z = RoHS Compliant Part. ©2011–2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09723-0-6/12(A) Rev. A | Page 12 of 12 Package Option RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 Branding LKU LKU LKT LKT LG2 LG2