LM3677TL-1.8EV National Semiconductor, LM3677TL-1.8EV Datasheet - Page 3

• Manufacturer Part Number: LM3677TL-1.8EV
• Description: BOARD EVALUATION LM3677TL-1.8
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3677TL-1.8EV

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.8V
• Current - Output: 600mA
• Voltage - Input: 2.7 ~ 5.5V
• Regulator Topology: Buck
• Frequency - Switching: 3MHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM3677
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

Connection Diagrams and Package
Mark Information
Pin Descriptions
A1
A3
C1
C3
B2
Pin#
2,5
1
6
3
4
Name
V
GND
EN
FB
SW
IN
FIGURE 3. 5-bump micro SMD Package
Description
Power supply input. Connect to the input filter capacitor.
Ground pin.
Enable pin. The device is in shutdown mode when voltage to this pin is < 0.4V and
enabled when > 1.0V. Do not leave this pin floating.
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. Connect to an inductor with a saturation current rating that exceeds the 750
mA max. Switch Peak Current Limit Specification.
FIGURE 4. 6–pin LLP Package
3
30012003
30012012
www.national.com