ADP221 Analog Devices, ADP221 Datasheet
ADP221
Related parts for ADP221
ADP221 Summary of contents
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... OUT EN1 EN2 GND without the need for a noise bypass capacitor. The ADP221 also includes an active pull-down to quickly discharge output loads. The ADP220/ADP221 are available in a miniature 6-ball WLCSP package and is stable with tiny 1 μF ± 30% ceramic output capacitors, resulting in the smallest possible board area for a wide variety of portable power needs ...
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... ADP220/ADP221 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 Data ................................................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 REVISION HISTORY 11/10—Rev Rev. E Changes to Ordering Guide .......................................................... 17 5/10— ...
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... V, both initially off, enable one START-UP OUT V = 0.8 V, both initially off, enable one OUT V = 3.3 V, one initially on, enable second OUT V = 0.8 V, one initially on, enable second OUT 2 ∞ μF, ADP221 only SHUTDOWN OUT LOAD OUT I LIMIT TS T rising SD-HYS V 2.5 V ≤ V ≤ ...
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... ADP220/ADP221 Parameter POWER SUPPLY REJECTION RATIO 1 Based on an end-point calculation using 1 mA and 200 mA loads. 2 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 2 Start-up time is defined as the time between the rising edge of ENx Current-limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value ...
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... THERMAL DATA Absolute maximum ratings apply individually only, not in combination. The ADP220/ADP221 can be damaged when the junction temperature limits are exceeded. Monitoring ambient temper- ature does not guarantee that the junction temperature (T is within the specified temperature limits. In applications with high power dissipation and poor thermal resistance, the maximum ambient temperature may have to be derated ...
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... ADP220/ADP221 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Description A1 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 VIN. B1 GND Ground Pin. C1 EN2 Enable Input for Regulator 2. Drive EN2 high to turn on Regulator 2; drive it low to turn off Regulator 2. ...
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... I = 10µA LOAD I = 100µA LOAD I = 1mA LOAD I = 10mA LOAD I = 100mA LOAD I = 200mA LOAD 4.7 4.9 5.1 5.3 5.5 Rev Page ADP220/ADP221 = 25°C, unless otherwise noted. 140 120 100 –40 – JUNCTION TEMPERATURE (°C) 120 V = 2.8V OUT V = 3.3V IN 100 T = 25° ...
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... ADP220/ADP221 160 140 120 100 –40 –5 25 JUNCTION TEMPERATURE (°C) Figure 10. Ground Current vs. Junction Temperature, Both Outputs Loaded 140 V = 2.8V OUT V = 3.3V 120 25°C A 100 0.01 0.1 1 LOAD CURRRENT (mA) Figure 11. Ground Current vs. Load Current, Both Outputs Loaded 140 120 ...
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... Figure 20. Power Supply Rejection Ratio vs. Frequency, at Various Output 10 1 0.1 0. 10M Figure 21. Output Noise Spectrum, V Rev Page ADP220/ADP221 = 50mV 200mA = 2.5V 100mA = 0.8V 10mA = 1µF 1mA 100µA 100 1k 10k 100k 1M FREQUENCY (Hz) 3.3V/200mA 0.8V/200mA 1.8V/200mA 3.3V/100µ ...
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... Figure 26. Line Transient Response 200 mA LOAD1 LOAD2 CH1 = V , CH2 = V , CH3 = V IN OUT1 OUT2 CH1 5.00V CH2 2.00V M40.0μs A CH1 9.80% B CH3 2.00V W Figure 27. Shutdown Response, ADP221 = 100mA 4.46V = 1mA 4.46V 2.10V ...
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... The ADP220/ADP221 are available in multiple output voltage options ranging from 0 3.3 V. The ADP220/ADP221 use the EN1/EN2 pins to enable and disable the VOUT1/VOUT2 pins under normal operating conditions. When EN1/EN2 are high, VOUT1/VOUT2 turn on; when EN1/EN2 are low, VOUT1/ VOUT2 turn off ...
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... Input and Output Capacitor Properties Any good quality ceramic capacitor can be used with the ADP220/ ADP221, 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 ADP220/ADP221 utilize 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 ADP220/ADP221 current limit, 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 38. Junction Temperature vs. Total Power Dissipation 140 120 100 2 500mm 2 50mm 2 0mm T JMAX 0.7 0.8 0.9 1.0 = 50°C Figure 39. Junction Temperature vs. Total Power Dissipation and A 2 500mm 2 50mm 2 0mm T JMAX 0.7 0.8 0.9 1.0 = 65°C A Rev Page ADP220/ADP221 0.1 0.2 0.3 0.4 0.5 0.6 0.7 TOTAL POWER DISSIPATION ( 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 TOTAL POWER DISSIPATION (W) Board Temperature 2 500mm 2 50mm 2 0mm ...
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... PRINTED CIRCUIT BOARD (PCB) LAYOUT CONSIDERATIONS Heat dissipation from the package can be improved by increasing the amount of copper attached to the pins of the ADP220/ADP221. However, as shown in Table 6, a point of diminishing returns eventually is reached, beyond which an increase in the copper size does not yield significant heat dissipation benefits ...
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... Wafer Level Chip Scale Package [WLCSP] 3.0/3.3 6-Ball Wafer Level Chip Scale Package [WLCSP] 2.8/2.8 6-Ball Wafer Level Chip Scale Package [WLCSP] 2.8/2.8 2.8 V/2.8 V Evaluation Board 2.8/2.8 2.8 V/2.8 V with Output Discharge Evaluation Board sales or distribution representative. Rev Page ADP220/ADP221 1.00 BSC B 0.50 BSC C 0.50 BSC BOTTOM VIEW ...
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... ADP220/ADP221 NOTES Rev Page ...
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... NOTES Rev Page ADP220/ADP221 ...
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... ADP220/ADP221 NOTES ©2008–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07572-0-11/10(E) Rev Page ...