LM3671TL-1.8EV National Semiconductor, LM3671TL-1.8EV Datasheet - Page 3

• Manufacturer Part Number: LM3671TL-1.8EV
• Description: BOARD EVALUATION LM3671TL-1.8
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3671TL-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: -

Pin Descriptions (SOT23-5)
Pin Descriptions (5-Bump Micro SMD)
Pin Descriptions (6-Pin LLP)
Pin #
Pin #
Pin #
A1
A3
C1
C3
B2
1
2
3
4
5
1
2
3
4
5
6
FIGURE 5. 6-Pin LLP Package Number LCA06B (2mm x 2mm x 0.6mm)
Name
Name
Name
Pgnd
Sgnd
GND
GND
SW
SW
SW
V
EN
V
EN
EN
V
FB
FB
FB
IN
IN
IN
Description
Power supply input. Connect to the input filter capacitor (Figure 1).
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 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.
Switching node connection to the internal PFET switch and NFET synchronous rectifier.
Description
Power supply input. Connect to the input filter capacitor (Figure 1).
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 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.
Switching node connection to the internal PFET switch and NFET synchronous rectifier.
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.
Singnal 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.
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