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LM3754 Datasheet(PDF) 9 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) 9 Page - Texas Instruments

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LM3754
www.ti.com
SNVS789B – JANUARY 2012 – REVISED APRIL 2013
Electrical Characteristics (continued)
Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of −5°C to
+125°C. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values represent
the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated VVIN =
12V, VVDD = 5V, VVCC = internal LDO, VEN = 2V, RFRQ = 78.7 kΩ, VPH = 0V, VCS1 = VCS2 = VCSM = VSS = VSNSP = 1.8V, VILIM −
VCSM = 100 mV, VSNSM = VSYNC = 0V, VSYNCOUT floating.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
tLG-GT
LG Asynchronous-to-
2
ms
Synchronous Gradual Transition
Time
tD-EN-SW
EN-to-Switching Delay
Delay from EN = High to FAULT = High; no
2
ms
pre-bias
Gate Drivers
IPK-HG-SOURCE
HG1 and HG2 Peak Source
Less than 100 ns
1.9
A
Current
RHG-SOURCE
HG1 and HG2 Source
VBOOT − VSW = 5V
2.5
Ω
Resistance
IPK-HG-SINK
HG1 and HG2 Peak Sink Current Less than 100 ns
4
A
RHG-SINK
HG1 and HG2 Sink Resistance
VBOOT − VSW = 5V
1
Ω
IPK-LG-SOURCE
LG1 and LG2 Peak Source
Less than 100 ns
2.3
A
Current
RLG-SOURCE
LG1 and LG2 Source Resistance
2
Ω
IPK-LG-SINK
LG1 and LG2 Peak Sink Current
Less than 100 ns
4
A
RLG-SINK
LG1 and LG2 Sink Resistance
1
Ω
RHG-PULLDOWN HG-SW Pull-Down Resistor
16
k
Ω
RLG-PULLDOWN LG-PGND Pull-Down Resistor
16
k
Ω
tD-HG-LG
HG Falling to LG Rising Cross-
SW node not switching
30
ns
Conduction Protection Delay
(Dead-Time)
tD-LG-HG
LG Falling to HG Rising Delay
28
ns
tDS-HG-LG
HG Falling to LG Rising Cross-
SW node switching
10
ns
Conduction Protection Delay
(Dead-Time)
Copyright © 2012–2013, Texas Instruments Incorporated
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