LM3674MFX-1.2 National Semiconductor, LM3674MFX-1.2 Datasheet - Page 2

• Manufacturer Part Number: LM3674MFX-1.2
• Description: IC,SMPS CONTROLLER,VOLTAGE-MODE,TSOP,5PIN,PLASTIC
• Manufacturer: National Semiconductor

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Typical Application
Connection Diagram and Package Mark Information
Note: The actual physical placement of the package marking will vary from part to part.
Pin Descriptions
Pin #
1
2
3
4
5
Name
GND
SW
V
EN
FB
IN
(Continued)
Description
Power supply input. Connect to the input filter capacitor ( Figure 1).
Ground pin.
Enable input. The device is in shutdown mode when voltage to this pin is
enable when
Feedback analog input. Connect to the output filter capacitor for fixed voltage
versions. For adjustable version external resistor dividers are required ( Figure 2).
The internal resistor dividers are disabled for the adjustable version.
Switching node connection to the internal PFET switch and NFET synchronous
rectifier.
FIGURE 2. Typical Application Circuit
NS Package Number MF05A
FIGURE 3. Top View
SOT23-5 Package
>
1.0V. Do not leave this pin floating.
2
20167202
20167230
<
0.4V and