LM3687TL-1813 NSC [National Semiconductor], LM3687TL-1813 Datasheet - Page 3

• Manufacturer Part Number: LM3687TL-1813
• Description: Step-Down DC-DC Converter with Integrated Low Dropout Regulator and Startup Mode
• Manufacturer: NSC [National Semiconductor]

Connection Diagrams
Note:The actual physical placement of the package marking will vary from part to part. The package marking "X" designates the
date code. "T" is a NSC internal code for die traceability. Both will vary considerably. "BC" identifies the device (part number, option,
etc.)
Pin Descriptions
Voltage Options
* For availability of these or other output voltage combinations please contact your local NSC sales office
Pin Number Pin Name
A1
A2
A3
B1
B2
B3
C1
C2
C3
DC-DC Converter Output:
V
1.80V
1.80V *
1.80V *
OUT_DCDC
Connection Diagram 9-Bump Thin Micro SMD Package
PGND
SGND
V
SW
EN_DCDC
V
V
FB_DCDC
EN_LIN
OUT_LIN
IN_LIN
BATT
Large Bump, 0.5mm Pitch,
See NS Package TLA09
Top View
Description
Power Ground pin
Signal Ground pin
Voltage Output of the linear regulator
Switching Node Connection to the internal PFET switch and NFET synchronous rectifier
Enable Input for the DC-DC converter. The DC-DC converter is in shutdown mode if voltage at this
pin is < 0.4V and enabled if > 1.0V. Do not leave this pin floating. Please see section 'Enable
Combinations'.
Power Supply Input for the linear regulator
Power Supply for the DC-DC output stage and internal circuitry. Connect to the input filter capacitor
(see typical application).
Feedback Analog Input for the DC-DC converter. Connect directly to the output filter capacitor.
Enable Input for the linear regulator. The linear regulator is in shutdown mode if voltage at this pin
is < 0.4V and enabled if > 1.0V. Do not leave this pin floating. Please see section 'Enable
Combinations'.
20210102
3
Linear Regulator Output:
V
1.50V
1.20V *
1.30V *
OUT_LIN
Package Mark
20210104
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