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LM2696MXA Scheda tecnica(PDF) 1 Page - National Semiconductor (TI) |
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LM2696MXA Scheda tecnica(HTML) 1 Page - National Semiconductor (TI) |
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1 / 19 page  LM2696 3A, Constant On Time Buck Regulator General Description The LM2696 is a pulse width modulation (PWM) buck regu- lator capable of delivering up to 3A into a load. The control loop utilizes a constant on-time control scheme with input voltage feed forward. This provides a topology that has excellent transient response without the need for compen- sation. The input voltage feed forward ensures that a con- stant switching frequency is maintained across the entire V IN range. The LM2696 is capable of switching frequencies in the range of 100 kHz to 500 kHz. Combined with an integrated 130 m Ω high side NMOS switch the LM2696 can utilize small sized external components and provide high efficiency. An internal soft-start and power-good flag are also provided to allow for simple sequencing between multiple regulators. The LM2696 is available with an adjustable output in an exposed pad TSSOP-16 package. Features n Input voltage range of 4.5V–24V n Constant On-Time n No compensation needed n Maximum Load Current of 3A n Switching frequency of 100 kHz–500 kHz n Constant frequency across input range n TTL compatible shutdown thresholds n Low standby current of 12 µA n 130 m Ω internal MOSFET switch Applications n High efficiency step-down switching regulators n LCD Monitors n Set-Top Boxes Typical Application Circuit 20153401 October 2005 © 2005 National Semiconductor Corporation DS201534 www.national.com |
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