 English |
|
|
|
|
|
|
|
| LM3670MF-18 Datasheet, PDF (2/25 Pages) Texas Instruments – LM3670 Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits | |||
| |||
| ◁ |
LM3670
SNVS250E â NOVEMBER 2004 â REVISED FEBRUARY 2013
www.ti.com
DESCRIPTION (CONTINUED)
The LM3670 is available in a SOT-23-5 package. A high switching frequency - 1 MHz (typ) - allows use of tiny
surface-mount components. Only three external surface-mount components, an inductor and two ceramic
capacitors, are required.
Typical Application (continued)
VIN
2.5V to 5.5V
CIN: 4.7 µF
VIN
1
L1: 4.7 µH or 10 µH[A]
SW
5
LM3670
GND
2
C1
R1
EN
3
FB
4
VOUT
COUT: 10 µF
C2
R2
A. See Table 3
Connection Diagram
Figure 2. Adjustable Output Voltage
SW
FB
5
4
Pin #
1
2
3
4
5
VIN
GND
EN
1
2
3
Figure 3. SOT-23-5 Package (Top View)
Name
VIN
GND
EN
FB
SW
PIN DESCRIPTIONS
Description
Power supply input. Connect to the input filter capacitor (Figure 1).
Ground pin.
Enable input.
Feedback analog input. Connect to the output filter capacitor (Figure 1).
Switching node connection to the internal PFET switch and NFET synchronous rectifier. Connect to an
inductor with a saturation current rating that exceeds the 750 mA max. Switch Peak Current Limit
specification.
2
Submit Documentation Feedback
Product Folder Links: LM3670
Copyright © 2004â2013, Texas Instruments Incorporated
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese