LM22676MRX-ADJ/NOPB

ACTIVE

Features for the LM22676

• Wide Input Voltage Range: 4.5 V to 42 V

• Internally Compensated Voltage Mode Control

• Stable with Low ESR Ceramic Capacitors

• 120 mΩ N-Channel MOSFET PFM Package

• 100 mΩ N-Channel MOSFET PSOP-8 Package

• 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

• Precision Enable Pin

• Integrated Boot-Strap Diode

• Integrated Soft-Start

• Fully WEBENCH® Enabled

• LM22676Q is an Automotive Grade Product 
  that is AEC-Q100 Grade 1 Qualified 
  (–40°C to +125°C Operating Junction 
  Temperature)

• SO PowerPAD (Exposed Pad

• PFM (Exposed Pad)

Description for the LM22676

The LM22676 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 capable of providing up to 3 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. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typ). Built in soft-start (500 µs, typ) saves external components. The LM22676 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22676 is a member of Texas Instruments’ 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. TI's WEBENCH® tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in.