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1 Features 3 Description
1 The LM22674 switching regulator provides all of the • Wide Input Voltage Range: 4.5 V to 42 V
functions necessary to implement an efficient high
• Internally Compensated Voltage Mode Control voltage step-down (buck) regulator using a minimum
• Stable with Low ESR Ceramic Capacitors of external components. This easy to use regulator
• 200 mΩ N-Channel MOSFET incorporates a 42 V N-channel MOSFET switch
capable of providing up to 500 mA of load current.
• Output Voltage Options: Excellent line and load regulation along with high -ADJ (Outputs as Low as 1.285 V) efficiency (> 90%) are featured. Voltage mode control -5.0 (Output Fixed to 5 V) offers short minimum on-time, allowing the widest
• ±1.5% Feedback Reference Accuracy ratio between input and output voltages. Internal loop
• Switching Frequency of 500 kHz compensation means that the user is free from the
tedious task of calculating the loop compensation
• –40°C to 125°C Operating Junction Temperature components. Fixed 5 V output and adjustable output Range voltage options are available. A switching frequency
• Precision Enable Pin of 500 kHz allows for small external components and
good transient response. A precision enable input • Integrated Boot-Strap Diode
allows simplification of regulator control and system • Integrated Soft-Start
power sequencing. In shutdown mode the regulator
• Fully WEBENCH® Enabled draws only 25 μA (typ). Built in soft-start (500 μs, typ)
• LM22674-Q1 is an Automotive Grade Product saves external components. The LM22674 also has
that is AEC-Q100 Grade 1 Qualified (–40°C to built in thermal shutdown, and current limiting to
+125 protect against accidental overloads. °C Operating Junction Temperature)
• SO PowerPAD (Exposed Pad) The LM22674 device is a member of Texas
Instruments' SIMPLE SWITCHER®
family. The
SIMPLE SWITCHER®
2 Applications concept provides for an easy
to use complete design using a minimum number of
• Industrial Control external components and the TI WEBENCH® design
• Telecom and Datacom Systems tool. TI's WEBENCH®
tool includes features such as
external component calculation, electrical simulation, • Embedded Systems
thermal simulation, and Build-It boards for easy
• Conversions from Standard 24 V, 12 V and 5 V
design-in. Input Rails
1.285 V
PSOP-EP-8
500 mA
1 Output