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LM2694 Fiches technique(PDF) 1 Page - National Semiconductor (TI) |
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LM2694 Fiches technique(HTML) 1 Page - National Semiconductor (TI) |
1 / 19 page LM2694 30V, 600 mA Step Down Switching Regulator General Description The LM2694 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 0.6A to the load. This buck regulator contains an N-Channel Buck Switch, and is available in the3x3 thermally enhanced LLP-10 package and a TSSOP-14 package. The feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operat- ing frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional fea- tures include: VCC under-voltage lockout, thermal shut- down, gate drive under-voltage lockout, and maximum duty cycle limiter. Features n Integrated N-Channel buck switch n Integrated start-up regulator n Input Voltage Range: 8V to 30V n No loop compensation required n Ultra-Fast transient response n Operating frequency remains constant with load current and input voltage variations n Maximum Duty Cycle Limited During Start-Up n Adjustable output voltage n Valley Current Limit At 0.6A n Maximum switching frequency: 1 MHz n Precision internal reference n Low bias current n Highly efficient operation n Thermal shutdown Typical Applications n High Efficiency Point-Of-Load (POL) Regulator n Non-Isolated Telecommunication Buck Regulator n Secondary High Voltage Post Regulator Package n LLP-10 (3 mm x 3 mm) w/Exposed Pad n TSSOP-14 Basic Step Down Regulator 20187001 May 2006 © 2006 National Semiconductor Corporation DS201870 www.national.com |
Numéro de pièce similaire - LM2694 |
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Description similaire - LM2694 |
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