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LM2743MTC bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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LM2743MTC bảng dữ liệu(HTML) 1 Page - Texas Instruments |
1 / 41 page 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 + Product Folder Sample & Buy Technical Documents Tools & Software Support & Community 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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