LM22676 SIMPLE SWITCHER® 4.5V to 42V, 3A Step-Down Regulator with Precision Enable | TI.com

LM22676 (ACTIVE)

SIMPLE SWITCHER® 4.5V to 42V, 3A Step-Down Regulator with Precision Enable

SIMPLE SWITCHER® 4.5V to 42V, 3A Step-Down Regulator with Precision Enable - LM22676
 

Recommended alternative parts

  • LM43603  -  3.5 to 36V, 3A Synchronous Step-Down Voltage Regulator - Higher efficiency, Low Quiescent Current, Smaller Solution Size
  • LMR14030  -  4 to 40V, 3.5A 2.2MHz Step-Down Voltage Regulator - Low Quiescent Current, Smaller Solution Size

Description

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.

Features

  • 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)

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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
LM22676 LM22671 LM22672 LM22674 LM22675 LM22675-Q1 LM22680 LM22680-Q1
4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5    
42     42     42     42     42     42     42     42    
1.285     1.285     1.285     1.285     1.285     1.285     1.285     1.285    
37     37     37     37     37     37     37     37    
3     0.5     1     0.5     1     1     2     2    
1     1     1     1     1     1     1     1    
500     200     200     500     500     500     200     200    
500     1000     1000     500     500     500     1000     1000    
3.4     3.4     3.4     3.4     3.4     3.4     3.4     3.4    
Enable     Enable     Enable     Enable     Enable     Enable     Enable
Frequency Synchronization    
Enable
Frequency Synchronization    
Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode    
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    
Catalog     Catalog     Catalog     Catalog     Catalog     Automotive     Catalog     Automotive    
SO PowerPAD
TO-263    
SO PowerPAD     SO PowerPAD     SO PowerPAD     SO PowerPAD     SO PowerPAD     SO PowerPAD     SO PowerPAD    

Other qualified versions of LM22676

Version Part Number Definition
Automotive LM22676-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
Coming Soon!
WEBENCH® Power Designer is now even easier to use. Learn more.

WEBENCH® Designer LM22676

  Min   Max Range
Vin  V 4.5 to 42.0V
Vout  V 1.28 to 37V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 125°C


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