The LM22679 switching regulator provides all of the functions necessary to implement an efficient high-voltage step-down (buck) regulator using a minimum of external components. This easy-to-use regulator incorporates a 42-V N-channel MOSFET switch that can provide up to 5 A of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5-V output and adjustable output voltage options are available. A switching frequency of 500 kHz allows for small external components and good transient response. An adjustable soft-start feature is provided through the selection of a single external capacitor. In addition, the switch-current limit can be programmed with a single external resistor, allowing solution optimization. The LM22679 device also has built-in thermal shutdown and current limiting to protect against accidental overloads.
●SIMPLE SWITCHER® family. The SIMPLE SWITCHER concept provides for an easy to use complete design using a minimum number of external components and the TI WEBENCH design tool. TIs WEBENCH tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in.
● Wide Input Voltage Range: 4.5 V to 42 V
● Internally Compensated Voltage Mode Control
● Stable With Low ESR Ceramic Capacitors
● 100-mΩ N-Channel MOSFET
● Output Voltage Options:
● -ADJ (Outputs as Low as 1.285 V)
● -5.0 (Output Fixed to 5 V)
● ±1.5% Feedback Reference Accuracy
● Switching Frequency of 500 kHz
● –40°C to 125°C Operating Junction
●Temperature Range
● Adjustable Soft-Start
● Adjustable Current Limit
● Integrated Boot-Strap Diode
● Fully WEBENCH® Enabled
● LM22679-Q1 is AEC-Q100 Qualified and
●Manufactured on an Automotive-Grade Flow
● PFM (Exposed Pad) Package
