LM22678 Datasheet | Texas Instruments

LM22678, LM22678-Q1 SNVS585M - SEPTEMBER 2008 - REVISED OCTOBER 2020 LM22678/-Q1 42-V, 5-A SIMPLE SWITCHER® Step-Down Voltage Regulator With Easy-to-Use Package 1 Features - New product available: LM61460 3-V to 36-V, 6-A low EMI synchronous converter - Wide input voltage range: 4.5 V to 42 V - Internally pensated 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 k Hz - - 40°C to 125°C Operating junction temperature range - Precision enable pin - Integrated bootstrap diode - Integrated soft start - Fully WEBENCH® enabled - LM22678-Q1 is an automotive-grade product that is AEC-Q100 grade 1 qualified (- 40°C to +125°C operating junction temperature) - PFM (exposed pad) package 2 Applications - Industrial distributed power applications - Test and measurement - Appliances - General-purpose wide VIN applications 3 Description The LM22678 switching regulator provides all of the functions necessary to implement an efficient highvoltage step-down (buck) regulator using a minimum of external ponents. 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 pensation means that the user is free from the tedious task of calculating the loop pensation ponents. Fixed 5-V output and adjustable output voltage options are available. A switching frequency of 500 k Hz allows for small external ponents 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 (typical). Built-in...