ADP2109 Analog Devices, ADP2109 Datasheet
ADP2109
Related parts for ADP2109
ADP2109 Summary of contents
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... NiMH cells, PCMCIA, USB, and other standard power sources. The maximum load current of 600 mA is achievable across the input voltage range. The ADP2109 is available in fixed output voltages of 1.8 V, 1.5 V, 1.2 V, and 1.0 V. All versions include an internal power switch and synchronous rectifier for minimal external part count and high efficiency ...
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... ADP2109 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Typical Applications Circuit ............................................................ 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Input and Output Capacitor, Recommended Specifications .. 3 Absolute Maximum Ratings ............................................................ 4 Thermal Resistance ...................................................................... 4 ESD Caution .................................................................................. 4 Pin Configuration and Function Descriptions ............................. 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ...................................................................... 10 Control Scheme .......................................................................... 10 PWM Mode ................................................................................. 10 Power Save Mode ........................................................................ 10 REVISION HISTORY 4/10— ...
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... A J PFET NFET PFET switch peak current limit V = 1.0 V OUT 3 200 mA LOAD Symbol Conditions −40°C to +125°C MIN −40°C to +125°C A Rev Page ADP2109 Min Typ Max Unit 2.3 5.5 V 2.3 V 2.05 2.15 2.25 V − −2.5 +2 μ ...
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... Absolute maximum ratings apply individually only, not in combination. Unless otherwise specified, all other voltages are referenced to GND. The ADP2109 can be damaged when the junction temperature limits are exceeded. Monitoring ambient temperature does not Rating guarantee that the junction temperature (T − ...
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... Switch Node Output the drain of the PFET switch and NFET synchronous rectifier Enable Input. Drive EN high to turn on the ADP2109. Drive EN low to turn it off and reduce the input current to 0.1 μ Feedback Input of the Error Amplifier. Connect FB to the output of the switching regulator. ...
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... ADP2109 TYPICAL PERFORMANCE CHARACTERISTICS 25° unless otherwise noted +85° +25°C 18 –40° 2.5 3.0 3.5 4.0 INPUT VOLTAGE (V) Figure 3. Quiescent Supply Current vs. Input Voltage 3500 3400 3300 3200 –40°C 3100 3000 +25°C 2900 +85°C 2800 2700 ...
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... CH1 50mV 0.5 0.6 CH3 1V Figure 13. Line Transient 20mV 1 CH3 1V Figure 14. Line Transient, V Rev Page ADP2109 5.5V IN 0.01 0.1 OUTPUT CURRENT (A) Figure 12. Efficiency 1.0 V OUT OUT M 40µs A CH3 3.26V CH4 ...
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... ADP2109 OUT 1 CH1 50mV M 40µs CH3 1V CH4 2V T 10.80% Figure 15. Line Transient OUT 1 I OUT 2 CH1 50mV CH2 200mA Ω M 40µs CH4 2V T 19.80% Figure 16. Load Transient 1.8 V, 300 mA to 600 mA OUT OUT I OUT ...
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... CH1 120 = 5. 1.0V OUT 100 380mV 0 = 5.5 V Figure 25. Discharge Profile with Different Values of Output Capacitors IN 2.64mA Rev Page ADP2109 OUT 20mV CH2 200mA M 200ns A CH4 CH4 2V T 20% Figure 24. Typical PWM Waveform, 200 mA 50µF 20µF 10µ ...
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... The high switching frequency and tiny 5-ball WLCSP package allow for a small step-down dc-to-dc converter solution. The ADP2109 operates with an input voltage of 2 5.5 V and regulates an output voltage down to 1.0 V. CONTROL SCHEME The ADP2109 operates with a fixed frequency, current mode ...
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... The time required for the output voltage to ramp is called the soft start time. Start-up time in the ADP2109 is the measure of when the output is in regulation after the EN pin is driven high. Start-up time consists of the power-up time and soft start time. ...
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... C is 9.2481 μF at 1.8 V from the graph in Figure 28. OUT Substituting these values in the equation yields C EFF To guarantee the performance of the ADP2109 imperative that the effects of dc bias, temperature, and tolerances on the behavior of the capacitors be evaluated for each application (mA) DCR (mΩ ...
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... CIN LOAD ( MAX ) minimize supply noise, place the input capacitor as close as possible to the VIN pin of the ADP2109 IC. As with the output capacitor, a low ESR capacitor is recommended. The list of recommended capacitors is shown in Table 8. Table 8. Suggested 4.7 μF Capacitors Vendor Type Model Murata ...
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... ADP2109 EVALUATION BOARD GND IN ADP2109 L1 1µH TB1 VIN GND 4.7µF TB2 TB5 U1 Figure 29. Evaluation Board Schematic Figure 30. Top Layer, Recommended Layout Figure 31. Bottom Layer, Recommended Layout Rev Page TB3 V 2 OUT V OUT ...
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... TOP VIEW (BALL SIDE DOWN) ORDERING GUIDE Temperature 1 Model Range ADP2109ACBZ-1.0-R7 –40°C to +125°C ADP2109ACBZ-1.2-R7 –40°C to +125°C ADP2109ACBZ- 1.5-R7 –40°C to +125°C ADP2109ACBZ-1.8-R7 –40°C to +125°C ADP2109CB-1.8EVALZ RoHS Compliant Part. 0.657 0.602 0.546 0.022 REF ...
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... ADP2109 NOTES ©2009–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07964-0-4/10(A) Rev Page ...