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LM3754 Datasheet(PDF) 12 Page - Texas Instruments

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Part # LM3754
Description  Scalable 2-Phase Synchronous Buck Controller with Integrated FET Drivers and Linear Regulator Controller
PDF  47 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM3754 Datasheet(HTML) 12 Page - Texas Instruments

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background image
LG1
VDD
SW2
DEADTIME
CONTROL
OV Fault
OC Fault
Prebias
PWM
COMPARATOR
CURRENT LIMIT
COMPARATOR
A = 1
CURRENT SENSE
AMPLIFIER
HG2
BOOT2
DRIVER
CONTROL
PGND
LG2
CSM
CS2
ILIM
- +
VCC
VDD
VIN FEED-FORWARD
BANDGAP
REFERENCE
1.39V
ISS = 10 PA
Closed for
Master Controller
VREF = 0.6V
Closed for
Master Controller
MASTER
VCC - 1.2V
IAVE1 = 2 mA/V
OVP
780 mV
480 mV
UVP
A = 3.125
PWM 1
+
+
+
-
COMP
STARTUP AND
FAULT LOGIC
IFAULT
= 300 PA
4.14V
OVER
TEMP
4.02V
VDD
VCC
POWER_OK
EN
VIN
SS
FB
COMP
IAVE
REGULATORS,
SUPPLY UVLO
NBASE
PH
PGOOD
OSCILLATOR, PLL,
PWM RAMP
PWM 1
PWM 2
A To D
SYNCOUT
FREQ
SYNC
PWM 2
+
+
+
-
COMP
VDD
SW1
DEADTIME
CONTROL
OV Fault
OC Fault
Prebias
PWM
COMPARATOR
CURRENT LIMIT
COMPARATOR
A = 1
CURRENT SENSE
AMPLIFIER
HG1
BOOT1
DRIVER
CONTROL
PGND
CS1
ILIM
15 mV
VCS1 - VCSM + 15 mV
32
1
2
3
27
6
7
8
9
5
30
28
25
18
19
23
15
26
VCC
13
10
11
12
24
31
14
16
4
VCC
VCC
VCC
VCC
VCC
VCC
1.3V
2.8V
1.3V
2.8V
CSM
- +
15 mV
29
IILIM = 100 PA
VCC
IAVE2 = 2 mA/V
KFF = 0.232 V/V
VDD
R
R
+
-
R
R
DIFFERENTIAL
AMPLIFIER
SNSP
SNSM
VDIF
SGND
17
20
21
22
Closed for
Master
Controller
VCS2 - VCSM + 15 mV
A = 50
A = 50
FAULT
LM3754
SNVS789B – JANUARY 2012 – REVISED APRIL 2013
www.ti.com
Block Diagram
12
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Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: LM3754



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