LM2743MTCX/NOPB ,2.2-16V, Voltage Mode Synchronous Buck Controller with Tracking 14-TSSOP -40 to 125 SNVS276H–APRIL 2004–REVISED OCTOBER 20155 Pin Configuration and FunctionsPW Package14-Pin TSSOPTop ..
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LM2743MTCX/NOPB
2.2-16V, Voltage Mode Synchronous Buck Controller with Tracking 14-TSSOP -40 to 125
PGND
VCC
PWGD
FREQ
SS/TRACK
SGND
PGND
VCC = 3.3V VIN = 3.3V
VOUT = 1.2V@4ARCS CBOOT CIN1,2
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LM2743SNVS276H –APRIL 2004–REVISED OCTOBER 2015
LM2743 Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller Features 3 DescriptionThe LM2743isa high-speed synchronous buck Power Stage Input Voltage from1Vto 16V regulator controller with an accurate feedback voltage• Control Stage Input Voltage from3Vto6V accuracy of ±2%.It can provide simple down• Output Voltage Adjustable downto 0.6V conversionto output voltagesas lowas 0.6V. Though
the control sectionsof theIC are rated for3to 6V,• Power Good Flag and Shutdown the driver sections are designed to accept input• Output Over-Voltage and Under-Voltage Detection supply railsas highas 16V. The useof adaptive non-• ±2% Feedback Voltage Accuracy Over overlapping MOSFET gate drivers helps avoidTemperature potential shoot-through problems while maintaining
high efficiency. TheICis designed for the more cost-• Low-Side Adjustable Current Sensing
effective optionof 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 providingaSoft-Start Pins simple, adjustable current limit. Switching Frequency from 50 kHzto1 MHz The fixed-frequency voltage-mode PWM control• TSSOP-14 Package architectureis adjustable from 50 kHzto1 MHz with
one external resistor. This wide rangeof 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 pinof theIC 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
purposeof sequencing with respectto an external
rail.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application Diagram
