LM22674-Q1 (ACTIVE)

500 mA SIMPLE SWITCHER®, Step-Down Voltage Regulator with Precision Enable

 

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  • LM43600-Q1  -  3.5 to 36V, 500mA synchronous step-down voltage regulator - high efficiency, low quiescent current, smaller solution size

Description

The LM22674 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 500 mA 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 LM22674 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22674 device 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.

Features

  • Wide Input Voltage Range: 4.5 V to 42 V
  • Internally Compensated Voltage Mode Control
  • Stable with Low ESR Ceramic Capacitors
  • 200 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
  • Precision Enable Pin
  • Integrated Boot-Strap Diode
  • Integrated Soft-Start
  • Fully WEBENCH® Enabled
  • LM22674-Q1 is an Automotive Grade Product
    that is AEC-Q100 Grade 1 Qualified
    (–40°C to +125°C Operating Junction
    Temperature)
  • SO PowerPAD (Exposed Pad)

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Parametrics Compare all products in Buck Converter (Integrated Switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
LM22674-Q1 LM22671-Q1 LM22672-Q1 LM22673-Q1 LM22676-Q1 LM22677-Q1 LM22678-Q1 LM22679-Q1 LM22680-Q1
4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5    4.5   
42    42    42    42    42    42    42    42    42   
1.285    1.285    1.285    1.285    1.285    1.285    1.285    1.285    1.285   
37    37    37    37    37    37    37    37    37   
0.5    0.5    1    3    3    5    5    5    2   
1    1    1    1    1    1    1    1    1   
500    200    200    500    500    200    500    500    200   
500    1000    1000    500    500    1000    500    500    1000   
3.4    3.4    3.4    3.4    3.4    3.4    3.4    3.4    3.4   
Enable    Enable    Enable    Enable    Enable    Enable
Frequency Synchronization   
Enable    Adjustable Current Limit    Enable
Frequency Synchronization   
Voltage Mode    Voltage Mode    Voltage Mode    Voltage Mode    Voltage Mode    Voltage Mode    Voltage Mode    Voltage Mode    Voltage Mode   
90    90    90    90    90    90    90    90    90   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125   
Automotive    Automotive    Automotive    Automotive    Automotive    Automotive    Automotive    Automotive    Automotive   
SO PowerPAD    SO PowerPAD    SO PowerPAD    SO PowerPAD
TO-263   
SO PowerPAD
TO-263   
TO-263    TO-263    TO-263    SO PowerPAD   

Other qualified versions of LM22674-Q1

Version Part Number Definition
Catalog LM22674 TI's standard catalog product
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WEBENCH® Designer LM22674-Q1

  Min   Max Range
Vin  V 4.5 to 42.0V
Vout  V 1.28 to 37.0V
Iout  A ≤ 0.5A
Ambient Temp  °C -40 to 125°C


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