ADP322 Analog Devices, ADP322 Datasheet
ADP322
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ADP322 Summary of contents
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... The ADP322/ADP323 PSRR is greater than 60 dB for frequencies as high as 100 kHz while operating with a low headroom voltage. The ADP322/ADP323 offer much lower noise performance than competing LDOs without the need for a noise bypass capacitor ...
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... ADP322/ADP323 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Typical Application Circuits............................................................ 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Input and Output Capacitor, Recommended Specifications.. 4 Absolute Maximum Ratings............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution.................................................................................. 5 Pin Configurations and Function Descriptions ........................... 6 Typical Performance Characteristics ............................................. 8 REVISION HISTORY 9/11—Rev.0 to Rev. A Added Figure 2, Renumbered Sequentially .................................. 1 Changes to Theory of Operation Section ...
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... LDO OUT OUT V = 0.8 V OUT V = 3.3 V, one V initially on, enable second or OUT OUT third LDO V = 0.8 V OUT T rising SD J SD-HYS Rev Page ADP322/ADP323 , BIAS OUT1 OUT2 OUT3 Min Typ 2.5 1.8 85 120 250 66 0.1 = −40°C to +125°C 0.01 −1 − ...
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... ADP322/ADP323 Parameter Symbol EN INPUT EN Input Logic High Input Logic Low Input Leakage Current V I-LEAKAGE UNDERVOLTAGE LOCKOUT UVLO Input Bias Voltage (VBIAS) UVLO Rising Input Bias Voltage (VBIAS) UVLO Falling Hysteresis UVLO OUTPUT NOISE OUT POWER SUPPLY REJECTION RATIO PSRR 1 Accuracy when VOUTx is connected directly to FBx ...
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... THERMAL DATA Absolute maximum ratings apply individually only, not in combination. The ADP322/ADP323 triple LDO can be damaged when the junction temperature limits are exceeded. Monitoring ambient temperature does not guarantee that the junction temperature ( within the specified temperature limits. In applications ...
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... ADP322/ADP323 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS Table 5. ADP322 Pin Function Descriptions Pin No. Mnemonic Description 1 EN1 Enable Input for Regulator 1. Drive EN1 high to turn on Regulator 1; drive it low to turn off Regulator 1. For automatic startup, connect EN1 to VBIAS. 2 VBIAS Input Voltage Bias Supply. Bypass VBIAS to GND with a 1 μF or greater capacitor. ...
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... Exposed pad for enhanced thermal performance. Connect to copper ground plane. EN1 1 12 GND VBIAS ADP323 VIN1/VIN2 3 10 VIN3 FB1 4 9 FB3 TOP VIEW (Not to Scale) NOTES CONNECT. 2. CONNECT EXPOSED PAD TO GROUND PLANE. Figure 4. ADP323 Pin Configuration Rev Page ADP322/ADP323 ...
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... ADP322/ADP323 TYPICAL PERFORMANCE CHARACTERISTICS 3 IN1 IN2 IN3 BIAS OUT1 enable voltage 25°C, unless otherwise noted. A 3.33 LOAD = 1mA LOAD = 5mA LOAD = 10mA 3.32 LOAD = 50mA LOAD = 100mA LOAD = 200mA 3.31 3.30 3.29 3.28 3.27 –40 – (°C) J Figure 5. Output Voltage vs. Junction Temperature 3 ...
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... V (V) IN Figure 13. Output Voltage vs. Input Voltage 85 125 Figure 14. Ground Current vs. Junction Temperature, Single Output Loaded 100 1000 4.20 4.60 5.00 5.40 Figure 16. Ground Current vs. Input Voltage, Single Output Loaded Rev Page ADP322/ADP323 140 120 100 –40 – (°C) J 120 100 80 60 ...
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... ADP322/ADP323 350 300 250 200 150 100 50 0 –40 – (°C) J Figure 17. Ground Current vs. Junction Temperature, All Outputs Loaded Equally 300 250 200 150 100 TOTAL LOAD CURRENT (mA) Figure 18. Ground Current vs. Load Current, All Outputs Loaded Equally 300 ...
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... IN Figure 25. Output Voltage vs. Input Voltage (in Dropout 3.3 V OUT1 75 100 125 Figure 26. Ground Current vs. Input Voltage (in Dropout), V 100 1000 3.40 3.45 3.50 Rev Page ADP322/ADP323 350 300 250 200 150 100 LOAD = 1mA LOAD = 5mA LOAD = 10mA 50 LOAD = 50mA LOAD = 100mA LOAD = 200mA 0 3.10 3 ...
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... ADP322/ADP323 160 140 120 100 80 60 LOAD = 1mA 40 LOAD = 5mA LOAD = 10mA LOAD = 50mA 20 LOAD = 100mA LOAD = 200mA 0 1.70 1.80 1.90 V (V) IN Figure 29. Ground Current vs. Input Voltage (in Dropout 200mA 100mA –10 10mA 1mA –20 –30 –40 –50 –60 –70 –80 –90 –100 ...
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... CH2 = V LOAD1 10 100 1000 = 5 V Figure 38. Load Transient Response CH1 44mA = 1 mA, LOAD3 , CH4 = V OUT2 OUT3 A CH1 124mA = 1 μF, OUT1 Rev Page ADP322/ADP323 I LOAD2 1 V OUT2 2 CH1 200mA Ω 50mV B M40µs A CH1 B CH2 10. 200 mA, C LOAD2 ...
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... ADP322/ADP323 OUT1 2 V OUT2 3 V OUT3 4 CH1 1V CH2 10mV B M2µ 10mV B 10mV B CH3 CH4 T 12 Figure 41. Line Transient Response LOAD1 LOAD2 CH1 = V , CH2 = V , CH3 = V IN OUT1 OUT2 A CH1 4.58V =1 mA, LOAD3 ...
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... VOUT3 VIN3 GND OVERCURRENT Figure 43. ADP322 Internal Block Diagram The ADP323 differs from the ADP322 except in that the output voltage dividers are internally disconnected and the feedback inputs of the error amplifiers are brought out for each output. VIN1/VIN2 OVERCURRENT INTERNAL BIAS ...
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... If an output capacitance greater than 1 μF is required, the input capacitor should be increased to match it. Input and Output Capacitor Properties Any good quality ceramic capacitor can be used with the ADP322/ ADP323, as long as the capacitor meets the minimum capacit- ance and maximum ESR requirements. Ceramic capacitors are manufactured with a variety of dielectrics, each with a different behavior over temperature and applied voltage ...
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... The ADP322/ADP323 use an internal soft start to limit the inrush current when the output is enabled. The start-up time for the 2.8 V option is approximately 220 μs from the time the ENx active threshold is crossed to when the output reaches 90% of its final value. The start-up time is somewhat dependent on the output voltage setting and increases slightly as the output voltage increases ...
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... Consider the case where a hard short from VOUTx to GND occurs. At first, the ADP322/ADP323 limits current so that only 300 mA is conducted into the short. If self-heating of the junction is great enough to cause its temperature to rise above 155°C, thermal shutdown activates, turning off the output and reducing the output current to zero ...
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... Figure 53. Junction Temperature vs. Total Power Dissipation 1000mm 2 500mm 2 100mm 2 50mm JEDEC T MAX J 0.8 1.0 1.2 = 50°C Figure 54. Junction Temperature vs. Total Power Dissipation and A Rev Page ADP322/ADP323 140 120 100 0.2 0.4 0.6 0.8 TOTAL POWER DISSIPATION (W) 140 120 100 ...
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... CONSIDERATIONS Heat dissipation from the package can be improved by increasing the amount of copper attached to the pins of the ADP322/ADP323. However, as can be seen from Table 7, a point of diminishing returns is eventually reached, beyond which an increase in the copper size does not yield significant heat dissipation benefits. ...
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... ADP322ACPZ-145-R7 −40°C to +125°C ADP322ACPZ-155-R7 −40°C to +125°C ADP322ACPZ-165-R7 −40°C to +125°C ADP322ACPZ-175-R7 −40°C to +125°C ADP322ACPZ-189-R7 −40°C to +125°C ADP323ACPZ-R7 −40°C to +125°C ADP322CP-EVALZ ADP323CP-EVALZ ADP322CPZ-REDYKIT RoHS Compliant Part. ...
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... ADP322/ADP323 NOTES Rev Page Data Sheet ...
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... Data Sheet NOTES Rev Page ADP322/ADP323 ...
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... ADP322/ADP323 NOTES ©2010–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09288-0-9/11(A) Rev Page Data Sheet ...