LM3671MF-1.8EV National Semiconductor, LM3671MF-1.8EV Datasheet - Page 4

• Manufacturer Part Number: LM3671MF-1.8EV
• Description: BOARD EVALUATION LM3671MF-1.8
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3671MF-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: 2MHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM3671
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

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Pin#
1
2
3
4
5
6
Pin#
A1
A3
C1
C3
B2
TABLE 3. Pin Descriptions (6–pin LLP)
TABLE 4. Pin Descriptions (5-bump micro SMD)
Name
EN
PGND
VIN
SW
SGND
FB
Name
VIN
GND
EN
FB
SW
Description
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.
Ground pin
Power supply input. Connect to the input filter capacitor.
Switching node connection to the internal PFET switch and NFET synchronous rectifier.
Signal ground (feedback ground).
Feedback analog input. Connect directly 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.
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 5. 5-bump micro SMD Package
4
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