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LM3753 Datasheet(PDF) 4 Page - Texas Instruments

Part # LM3753
Description  LM3753 Scalable 2-Phase Synchronous Buck Controller with Integrated FET Drivers and Linear Regulator Controller
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM3753 Datasheet(HTML) 4 Page - Texas Instruments

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LM3753
SNVS614B – DECEMBER 2009 – REVISED MARCH 2013
www.ti.com
PIN DESCRIPTIONS (continued)
Pin Number
Pin Name
Description
26
EN
Enable Input. Used for VIN UVLO function, connect EN to the midpoint of a voltage divider from VIN to
SGND. The EN pins of all controllers must be wired together. For an on/off EN function, wire the EN
pins of all controllers together and control with an open drain output.
27
CS2
Positive current-sense input of Phase 2. Connect to the DCR network or the current-sense resistor of
Phase 2. The negative current-sense input is the CSM pin.
28
ILIM
Current Limit Set. Connect a resistor between ILIM and CSM. The resistance between ILIM and CSM
programs the current limit.
29
CSM
Negative current-sense input of the internal current-sense amplifiers. Connect to VOUT.
30
CS1
Positive current-sense input of Phase 1. Connect to the DCR network or the current-sense resistor of
Phase 1. The negative current-sense input is the CSM pin.
31
PH
Phase Select Input. Connect this pin to the middle of a resistor divider between VCC and SGND to
program the number of phases in the system.
32
BOOT2
Bootstrap pin of Phase 2 for the high-side gate drive power supply.
DAP
Die Attach Pad. Must be connected to PGND and SGND but cannot be used as the primary ground
connection; do not place any traces or vias other than GND in the outer layer under the DAP; see AN-
1187 application note (literature number SNOA401).
4
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