LM2696 Datasheet | National Semiconductor

Description The LM2696 is a pulse width modulation (PWM) buck regulator 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 pensation. The input voltage feed forward ensures that a constant switching frequency is maintained across the entire VIN range. The LM2696 is capable of switching frequencies in the range .. of 100 k Hz to 500 k Hz. bined with an integrated 130 mΩ high side NMOS switch the LM2696 can utilize small sized external ponents 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 n n n n n n n n Input voltage range of 4.5V- 24V Constant On-Time No pensation needed Maximum Load Current of 3A Switching frequency of 100 k Hz- 500 k Hz Constant frequency across input range TTL patible shutdown thresholds Low standby current of 12 µA 130 mΩ internal MOSFET switch Applications n High efficiency step-down switching regulators n LCD Monitors n Set-Top Boxes Typical Application Circuit © 2005 National Semiconductor Corporation DS201534 .national. Connection Diagram Top View 20153402 e TSSOP-16 Package .. Pin Descriptions Pin # 1, 2, 3 4 5 6 7 8 9 10 11 12 13 14, 15, 16 Name SW CBOOT AVIN EXTVCC FB N/C GND SS PGOOD RON SD PVIN Exposed Pad Function Switching node Bootstrap capacitor input Analog voltage input Output of internal regulator for decoupling Feedback signal from output No connect Ground Soft-start pin Power-good flag, open drain output Sets the switch on-time dependent on current Shutdown pin Power voltage input Must be connected to ground Ordering Information Order Number LM2696MXA LM2696MXAX Package Type e TSSOP-16 e TSSOP-16 NSC Package Drawing MXA16A MXA16A 92 units/rail...