LM22675 SIMPLE SWITCHER® 4.5V to 42V, 1A Step-Down DC/DC Switching Regulator with Precision Enable | TI.com

LM22675 (ACTIVE)

SIMPLE SWITCHER® 4.5V to 42V, 1A Step-Down DC/DC Switching Regulator with Precision Enable

SIMPLE SWITCHER® 4.5V to 42V, 1A Step-Down DC/DC Switching Regulator with Precision Enable - LM22675
Datasheet
LM22675/-Q1 42 V, 1 A SIMPLE SWITCHER Step-Down Voltage Regulator with Features datasheet (Rev. L)
 

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Description

The LM22675 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 1 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 LM22675 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22675 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
  • Step-Down and Inverting Buck-Boost Applications
  • LM22675Q is an Automotive Grade Product
    that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C
    Operating Junction Temperature)
  • SO PowerPAD-8 (Exposed Pad) Package

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Parametrics Compare all products in Buck converters (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
Type
LM22675 LM22671 LM22672 LM22674 LM22675-Q1 LM22676 LM22677 LM22678 LM22679 LM22680 LM22680-Q1
4.5     4.5     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     42     42    
1.285     1.285     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     37     37    
1     0.5     1     0.5     1     3     5     5     5     2     2    
1     1     1     1     1     1     1     1     1     1     1    
500     200     200     500     500     500     200     500     500     200     200    
500     1000     1000     500     500     500     1000     500     500     1000     1000    
3.4     3.4     3.4     3.4     3.4     3.4     3.4     3.4     3.4     3.4     3.4    
Enable     Enable     Enable     Enable     Enable     Enable     Enable     Enable     Adjustable Current Limit     Enable
Frequency Synchronization    		 Enable
Frequency Synchronization    
Voltage Mode     Voltage Mode     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