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Part number: L4978D
Package: SO16
Number of pins: 16
Description: 2AMP STEP DOWN SWITCHING REGULATOR
Diagram:Click here
Pin Symbol Description
1NCNot Connected
2GNDGround
3SS_INHA logic signal (Active low) disables the device(Sleep mode operation). A capacitor connected between this pin and ground determines the soft start time. When this pin is grounded disables the device.
4OSCAn external resistor connected between the unregulated input voltage and this pin and a capacitor connected from this pin to ground fix the switching frequency.
5OUTStepdown regulator output.
6OUTStepdown regulator output.
7NCNot Connected
8NCNot Connected
9NCNot Connected
10NCNot Connected
11VCCUnregulated DC input voltage
12BOOTA capacitor connected between this pin and output allows to drive the internal DMOS transistor.
13COMPE/A output to be used for frequency compensation.
14FBConnecting output directly to this pin results in output voltage of 3.3v. An external voltage divider is require for higher output voltages.
15NCNot Connected
16NCNot Connected
 
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