ADP121 Analog Devices, ADP121 Datasheet
ADP121
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ADP121 Summary of contents
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... ON EN OFF Figure 2. ADP121 WLCSP with Fixed Output Voltage, 1.8 V The ADP121 is available in output voltages ranging from 1 3.3 V. The parts are optimized for stable operation with small 1 µF ceramic output capacitors. The ADP121 delivers good transient performance with minimal board area. Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions ...
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... ADP121 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Typical Application Circuits ............................................................ 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Recommended Specifications: Input and Output Capacitors 4 Absolute Maximum Ratings ............................................................ 5 Thermal Data ................................................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution .................................................................................. 5 Pin Configurations and Function Descriptions ........................... 6 REVISION HISTORY 8/11—Rev Rev. E Changes to Figure 22 ........................................................................ 9 Changes to Ordering Guide .......................................................... 19 1/10— ...
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... RISE UVLO FALL UVLO HYS OUT 100 kHz NOISE 100 kHz 100 kHz Rev Page ADP121 = 1 µ 25°C, unless otherwise noted. A Min Typ Max 2.3 5 0.1 1.5 −1 +1 − ...
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... ADP121 Parameter POWER SUPPLY REJECTION RATIO 1 Based on an end-point calculation using 1 mA and 100 mA loads. See Figure 6 for typical load regulation performance for loads less than 1 mA. 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 ...
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... THERMAL DATA Absolute maximum ratings apply individually only, not in combination. The ADP121 can be damaged when the junction temperature limits are exceeded. Monitoring the ambient temperature does not guarantee that the junction temperature ( within the specified temperature limits ...
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... ADP121 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS VIN 1 TOP VIEW GND 2 (Not to Scale CONNECT Figure 3. 5-Lead TSOT Pin Configuration Table 5. Pin Function Descriptions Pin No. TSOT WLCSP Mnemonic Description 1 A1 VIN Regulator Input Supply. Bypass VIN to GND with a 1 µF or larger capacitor. ...
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... I LOAD 10 I LOAD I LOAD I 5 LOAD I LOAD I LOAD 0 2.3 2.7 3.1 3.5 3.9 4.3 4.7 V (V) IN Figure 10. Ground Current vs. Input Voltage ADP121 = 10µA = 100µA = 1mA = 10mA = 100mA = 150mA 125°C 100 1000 V = 1.8V OUT T = 25° 10µA = 100µA = 1mA = 10mA = 100mA = 150mA 5.1 5.5 ...
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... ADP121 0. 2. 2. 4.20 0. 5.50 IN 0.20 0.15 0.10 0.05 0 –50 – TEMPERATURE (°C) Figure 11. Shutdown Current vs. Temperature at Various Input Voltages 180 T = 25°C A 160 140 120 100 2.5V OUT (mA) LOAD Figure 12. Dropout Voltage vs. Load Current, TSOT 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.20 3.25 3.30 3.35 3.40 V (V) IN Figure 13. Output Voltage vs. Input Voltage (In Dropout), TSOT ...
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... FREQUENCY (Hz) Voltages and Load Currents 100 1k 10k FREQUENCY (Hz mA LOAD 0.001 0.01 0 (mA) LOAD ADP121 1M 10M 1.2V 1.8V 3.3V 100k = 1 µF OUT 3.3V 2.5V 1.8V 1.5V 1.2V 100 1000 = μF IN OUT ...
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... ADP121 1mA TO 150mA LOAD STEP, 2.5A/µs V OUT (40µs/DIV) Figure 23. Load Transient Response, C 1mA TO 150mA LOAD STEP, 2.5A/µs V OUT (40µs/DIV) Figure 24. Load Transient Response LOAD 1.8V OUT = μF IN OUT I LOAD 1.8V OUT = C = 4.7 μF IN OUT Rev Page ...
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... R1 The ADP121 is available in output voltages ranging from 1 3.3 V. The ADP121 uses the EN pin to enable and disable the VOUT pin under normal operating conditions. When EN is high, VOUT turns on; when EN is low, VOUT turns off. For automatic startup, EN can be tied to VIN ...
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... The ESR of the output capacitor affects stability of the LDO control loop. A minimum of 0.70 μF capacitance with an ESR of 1 Ω or less is recommended to ensure stability of the ADP121. The transient response to changes in the load current is also affected by output capacitance. Using a larger value of output capacitance improves the transient response of the ADP121 to large changes in the load current. Figure 28 and Figure 29 show the transient responses for output capacitance values of 1 μ ...
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... ADP121 and the output behave in a predictable manner during power-up. ENABLE FEATURE The ADP121 uses the EN pin to enable and disable the VOUT pin under normal operating conditions. Figure 31 shows a rising voltage on EN crossing the active threshold, and then VOUT turns on. When a falling voltage on EN crosses the inactive threshold, VOUT turns off ...
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... Consider the case where a hard short from VOUT to GND occurs. At first, the ADP121 current limits, so that only 225 mA is con- ducted into the short. If self-heating of the junction is great enough to cause its temperature to rise above 150°C, thermal shutdown activates turning off the output and reducing the output current to zero ...
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... LOAD 1.0 1.5 2.0 2.5 3.0 3.5 V – V (V) IN OUT Figure 38. TSOT, 100 PCB Copper 50°C A MAX JUNCTION TEMPERATURE I = 1mA I = 75mA LOAD LOAD I = 10mA I = 100mA LOAD LOAD I = 25mA I = 150mA LOAD LOAD I = 50mA LOAD 1.0 1.5 2.0 2.5 3.0 3.5 V – V (V) IN OUT 2 Figure 39. TSOT PCB Copper 50°C A ADP121 4.0 4.5 4.0 4.5 4.0 4.5 ...
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... ADP121 140 MAX JUNCTION TEMPERATURE 120 I = 1mA LOAD I = 10mA LOAD I = 25mA 100 LOAD I = 50mA LOAD I = 75mA LOAD I = 100mA 80 LOAD I = 150mA LOAD 0.5 1.0 1.5 2.0 2.5 3.0 V – V (V) IN OUT 2 Figure 40. WLCSP, 500 mm of PCB Copper, T 140 MAX JUNCTION TEMPERATURE 120 I = 1mA LOAD I = 10mA LOAD ...
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... PCB Copper, Board Temperature = 85°C PCB LAYOUT CONSIDERATIONS Heat dissipation from the package can be improved by increasing the amount of copper attached to the pins of the ADP121. How- ever, as can be seen from Table 6 and 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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... ADP121 OUTLINE DIMENSIONS 1.60 BSC * 0.90 MAX 0.70 MIN 0.10 MAX BALL A1 IDENTIFIER (BALL SIDE DOWN) 2.90 BSC 5 4 2.80 BSC 0.95 BSC 1.90 BSC * 1.00 MAX 0.20 0.08 0.50 SEATING PLANE 0.30 * COMPLIANT TO JEDEC STANDARDS MO-193-AB WITH THE EXCEPTION OF PACKAGE HEIGHT AND THICKNESS. Figure 51. 5-Lead Thin Small Outline Transistor Package [TSOT] (UJ-5) Dimensions show in millimeters ...
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... WLCSP 3.3 4-Ball WLCSP 1.2 ADP121 1.2 V Output Evaluation Board 1.5 ADP121 1.5 V Output Evaluation Board 1.8 ADP121-1 1.8 V Output Evaluation Board 2.0 ADP121-1 2.0 V Output Evaluation Board 2.5 ADP121-1 2.5 V Output Evaluation Board 2.8 ADP121-1 2.8 V Output Evaluation Board 3.0 ADP121-1 3.0 V Output Evaluation Board 3.3 ADP121-1 3.3 V Output Evaluation Board Evaluation Board Kit Rev Page ...
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... ADP121 NOTES ©2008-2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06901-0-8/11(E) Rev Page Data Sheet ...