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Giải thích chi tiết về linh kiện  LM2743 Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
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LM2743MTC bảng dữ liệu(HTML) 1 Page - Texas Instruments

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HG
BOOT
ISEN
LG
PGND
FB
VCC
SD
PWGD
FREQ
SS/TRACK
SGND
EAO
PGND
VCC = 3.3V
VIN = 3.3V
VOUT = 1.2V@4A
RFB2
CC2
RC1
RCS
CSS
RFADJ
RCC
CCC
D1
CBOOT
Q1
CIN1,2
L1
+
CC1
RFB1
CO1,2
LM2743
RC2
CC3
RPULL-UP
+
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LM2743
SNVS276H – APRIL 2004 – REVISED OCTOBER 2015
LM2743 Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
1 Features
3 Description
The LM2743 is a high-speed synchronous buck
1
Power Stage Input Voltage from 1 V to 16 V
regulator controller with an accurate feedback voltage
Control Stage Input Voltage from 3 V to 6 V
accuracy of ±2%. It can provide simple down
Output Voltage Adjustable down to 0.6 V
conversion to output voltages as low as 0.6V. Though
the control sections of the IC are rated for 3 to 6V,
Power Good Flag and Shutdown
the driver sections are designed to accept input
Output Over-Voltage and Under-Voltage Detection
supply rails as high as 16V. The use of adaptive non-
±2% Feedback Voltage Accuracy Over
overlapping
MOSFET
gate
drivers
helps
avoid
Temperature
potential shoot-through problems while maintaining
high efficiency. The IC is designed for the more cost-
Low-Side Adjustable Current Sensing
effective option of driving only N-channel MOSFETs
Adjustable Soft-Start
in both the high-side and low-side positions. It senses
Tracking and Sequencing with Shutdown and
the low-side switch voltage drop for providing a
Soft-Start Pins
simple, adjustable current limit.
Switching Frequency from 50 kHz to 1 MHz
The
fixed-frequency
voltage-mode
PWM
control
TSSOP-14 Package
architecture is adjustable from 50 kHz to 1 MHz with
one external resistor. This wide range of switching
2 Applications
frequency gives the power supply designer the
flexibility
to
make
better
tradeoffs
between
3.3V Buck Regulation
component size, cost and efficiency.
Cable Modem, DSL and ADSL
Features
include
soft-start,
input
under-voltage
Laser Jet and Ink Jet Printers
lockout (UVLO) and Power Good (based on both
Low Voltage Power Modules
under-voltage
and
over-voltage
detection).
In
addition, the shutdown pin of the IC can be used for
DSP, ASIC, Core, and I/O
providing startup delay, and the soft-start pin can be
used for implementing precise tracking, for the
purpose of sequencing with respect to an external
rail.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM2743
TSSOP (14)
4.40 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Diagram
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.


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