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LM2743MTC Datasheet(PDF) 4 Page - Texas Instruments

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No. de pieza LM2743MTC
Descripción Electrónicos  LM2743 Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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LM2743MTC Datasheet(HTML) 4 Page - Texas Instruments

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LM2743
SNVS276G – APRIL 2004 – REVISED MARCH 2013
www.ti.com
Electrical Characteristics
(1) (continued)
VCC = 3.3V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA= TJ= 25°C. Limits appearing in
boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are specified by design,
test, or statistical analysis.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
GATE DRIVE
IQ-BOOT
BOOT Pin Quiescent Current
VBOOT = 12V, VSD = 0
18
90
µA
RHG_UP
High-Side MOSFET Driver Pull-Up
VBOOT = 5V @ 350mA Sourcing
3
ON resistance
RHG_DN
High-Side MOSFET Driver Pull-
HG = 5V @ 350mA Sourcing
2
Down ON resistance
RLG_UP
Low-Side MOSFET Driver Pull-Up
VBOOT = 5V @ 350mA Sourcing
3
ON resistance
RLG_DN
Low-Side MOSFET Driver Pull-
LG = 5V @ 350mA Sourcing
2
Down ON resistance
OSCILLATOR
RFADJ = 702.1 kΩ
50
RFADJ = 98.74 kΩ
300
fSW
PWM Frequency
kHz
RFADJ = 45.74 kΩ
475
600
725
RFADJ = 24.91 kΩ
1000
D
Max High-Side Duty Cycle
fSW = 300kHz
80
%
fSW = 600kHz
76
fSW = 1MHz
73
LOGIC INPUTS AND OUTPUTS
V STBY-IH
Standby High Trip Point
VFB = 0.575V, VBOOT = 3.3V, VSD
1.1
V
Rising
V STBY-IL
Standby Low Trip Point
VFB = 0.575V, VBOOT = 3.3V, VSD
0.232
V
Falling
V SD-IH
SD Pin Logic High Trip Point
VSD Rising
1.3
V
V SD-IL
SD Pin Logic Low Trip Point
VSD Falling
0.8
V
VPWGD-TH-LO
PWGD Pin Trip Points
FB Falling
0.408
0.434
0.457
V
VPWGD-TH-HI
PWGD Pin Trip Points
FB Rising
0.677
0.710
0.742
V
VPWGD-HYS
PWGD Hysteresis
FB Falling
60
mV
FB Rising
90
4
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