Datasheet

V
IN
1
GND
2
EN
3
FB
4
SW
5
1
2
5
43
V
IN
SW
FB
EN
GND
L
1
: 2.2 PH
V
OUT
C
OUT
: 10 PF
C
IN
: 4.7 PF
LM3674-
ADJ
V
IN
2.7V to 5.5V
C
1
C
2
R
1
R
2
LM3674
SNVS405F –DECEMBER 2005–REVISED MAY 2013 www.ti.com
Figure 2. Typical Application Circuit for Adjustable Voltage Option
PIN DIAGRAM
Figure 3. Top View
5-Pin SOT-23 Package
See Package Number DBV0005A
Note: The actual physical placement of the package marking will vary from part to part.
PIN DESCRIPTIONS
Pin Number Name Description
1 V
IN
Power supply input. Connect to the input filter capacitor ( Figure 1).
2 GND Ground pin.
Enable input. The device is in shutdown mode when voltage to this pin is <0.4V and enable when
3 EN
>1.0V. Do not leave this pin floating.
Feedback analog input. Connect to the output filter capacitor for fixed voltage versions. For adjustable
4 FB version external resistor dividers are required ( Figure 2). The internal resistor dividers are disabled for
the adjustable version.
5 SW Switching node connection to the internal PFET switch and NFET synchronous rectifier.
2 Submit Documentation Feedback Copyright © 2005–2013, Texas Instruments Incorporated
Product Folder Links: LM3674