LM3671LC-1.3 National Semiconductor, LM3671LC-1.3 Datasheet - Page 3

• Manufacturer Part Number: LM3671LC-1.3
• Description: IC CONV DC-DC STEP DOWN 6-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Step-Down (Buck)r

Specifications of LM3671LC-1.3

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.3V
• Current - Output: 600mA
• Frequency - Switching: 2MHz
• Voltage - Input: 2.7 ~ 5.5 V
• Operating Temperature: -30°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-LLP
• Power - Output: 606mW
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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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