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LM27224A Scheda tecnica(PDF) 1 Page - Texas Instruments |
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LM27224A Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 11 page + C4 + C3 VIN (up to 28V) VOUT GND 8 LG 7 VCC 6 SYNC 5 IN 4 BOOT 3 HG 2 SW 1 U1 C2 .33PF C1 1PF Q1 Q2 +5V (to controller) (to controller) D1 L1 1.5 NRND LM2724A www.ti.com SNVS242C – JUNE 2003 – REVISED MARCH 2013 LM2724A High Speed 3A Synchronous MOSFET Driver Check for Samples: LM2724A 1 FEATURES DESCRIPTION The LM2724A is a dual N-channel MOSFET driver 2 • Shoot-Through Protection which can drive both the top and bottom MOSFETs in • Input Under-Voltage-Lock-Out a push-pull structure simultaneously. The LM2724A • 3A Peak Driving Current takes a logic input and splits it into two complimentary signals with a typical 20ns dead time in between. The • 195µA Quiescent Current built-in cross-conduction protection circuitry prevents • 28V Input Voltage in Buck Configuration the top and bottom MOSFETs from turning on • SOIC-8 and WSON Packages simultaneously. With a bias voltage of 5V, the peak sourcing and sinking current for each driver of the APPLICATIONS LM2724A is about 3A. Input UVLO (Under-Voltage- Lock-Out) ensures that all the driver outputs stay low • High Current DC/DC Power Supplies until the supply rail exceeds the power-on threshold • High Input Voltage Switching Regulators during system power on, or after the supply rail drops below power-on threshold by a specified hysteresis • Fast Transient Microprocessors during system power down. The cross-conduction • Notebook Computers protection circuitry detects both driver outputs and will not turn on a driver until the other driver output is low. The top gate voltage needed by the top MOSFET is obtained through an external boot-strap structure. When not switching, the LM2724A only draws up to 195µA from the 5V rail. The synchronization operation of the bottom MOSFET can be disabled by pulling the SYNC pin to ground. TYPICAL APPLICATION 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2003–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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