LM2641MTC-ADJ Datasheet, PDF (3/31 Pages) Texas Instruments – LM2641 Dual Adjustable Step-Down Switching Power Supply Controller

LM2641
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Pin #
21
Name
CSL1
22
LIN
23
IN
24
LDRV2
25
CBOOT2
26
SW2
27
HDRV2
28
CSL2
SNVS040B – JANUARY 2000 – REVISED APRIL 2013
Pin Descriptions⁽¹⁾ (continued)
Function
The sense point for the negative side of the voltage across the current sense resistor (R4) placed in
series with output #1.
This pin provides a low-current (50 mA max) 5V output. This output is always on, and can not be turned
off by either the SD or ON/OFF pins.
This is the connection for the main input power.
The drive for the gate of the low-side switching FET (synchronous rectifier) used for output #2.
The bootstrap capacitor (C9) for output #2 is returned to this point.
This is the switching output drive point of the two power FETs which produce output #2.
The drive for the gate of the high-side switching FET used for output #2.
The sense point for the negative side of the voltage across the current sense resistor (R13) placed in
series with output #2.
Typical Application Circuits
Figure 2. Application With 5V/3A and 3.3V/4A Outputs
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