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ADP2139ACBZ-2.5-R7 Datasheet(PDF) 5 Page - Analog Devices |
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ADP2139ACBZ-2.5-R7 Datasheet(HTML) 5 Page - Analog Devices |
5 / 20 page Data Sheet ADP2138/ADP2139 Rev. C | Page 5 of 20 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS VIN EN SW GND VOUT 1 2 3 4 5 6 MODE TOP VIEW (BALL SIDE DOWN) Not to Scale Figure 2. Pin Configuration (Top View) Table 5. Pin Function Descriptions Pin No. Mnemonic Description 1 VIN Power Source Input. VIN is the source of the PFET high-side switch. Bypass VIN to GND with a 4.7 μF or greater capacitor as close to the ADP2138/ADP2139 as possible. 2 SW Switch Node Output. SW is the drain of the P-channel MOSFET switch and N-channel synchronous rectifier. Connect the output LC filter between SW and the output voltage. 3 GND Ground. Connect the input and output capacitors to GND. 4 EN Buck Activation. To turn on the buck, set EN to high. To turn off the buck, set EN to low. 5 MODE Mode Input. Drive the MODE pin high for the operating mode to force continuous PWM switching. Drive the MODE pin low to allow automatic PWM/PSM operating mode. 6 VOUT Output Voltage Sensing Input. |
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