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LM2726M Scheda tecnica(PDF) 1 Page - Texas Instruments |
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LM2726M Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 16 page GND 8 LG 7 VCC 6 EN 5 PWM_IN 4 CBOOT 3 HG 2 SW 1 LM2725/ LM2726 + + 0.1U Vin (up to 35V) Vout 1U PWM SIGNAL L1 Q1 Q2 D1 C1 C2 10 + 5 Cin Cout U1 Note: for ultra low-frequency operation (such as skip mode at light load), D1 should be a fast recovery type diode instead of a Schottky. LM2725, LM2726 www.ti.com SNVS144D – NOVEMBER 2000 – REVISED MARCH 2013 LM2725/LM2726 High Speed Synchronous MOSFET Drivers Check for Samples: LM2725, LM2726 1 FEATURES DESCRIPTION The LM2725/LM2726 is a family of dual MOSFET 2 • High Peak Output Current drivers that drive both the top MOSFET and bottom • Adaptive Shoot-Through Protection MOSFET in a push-pull structure simultaneously. It • 36V SW Pin Absolute Maximum Voltage takes a logic level PWM input and splits it into two complimentary signals with a typical 20ns dead time • Input Under-Voltage-Lock-Out in between. The built-in shoot-through protection • Typical 20ns Internal Delay circuitry prevents the top and bottom FETs from • Plastic 8-pin SOIC Package turning on simultaneously. With a bias voltage of 5V, the peak sourcing and sinking current for each driver APPLICATIONS of the LM2725 is about 1.2A and that of the LM2726 is about 3A. In an SOIC-8 package, each driver is • High Current DC/DC Power Supplies able to handle 50mA average current. When EN • High Input Voltage Switching Regulators signal is asserted the input UVLO (Under Voltage Lock Out) ensures that all the driver outputs stay low • Microprocessors until the supply rail exceeds the power-on threshold during system power on, or after the supply rail drops below power-on threshold by a specified hysteresis during system power down. The cross-conduction protection circuitry detects both the driver outputs and will not turn on a driver until the other driver output is low. The top gate bias voltage needed by the top MOSFET can be obtained through an external bootstrap structure. Minimum input pulse width is as low as 55ns. 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 © 2000–2013, 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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