LM22674 SIMPLE SWITCHER® 4.5V to 42V, 0.5A Step-Down DC/DC Switching Regulator with Precision Enable | TI.com

LM22674 (ACTIVE)

SIMPLE SWITCHER® 4.5V to 42V, 0.5A Step-Down DC/DC Switching Regulator with Precision Enable

 

Recommended alternative parts

  • LM43600  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   Synchronous 36V, 500mA Regulator - Higher 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)

WEBENCH ® Designer LM22674

  Min   Max Range
Vin -  V 4.5 to 42V
Product Option
Vout  V 5 to 5V
Iout  A ≤ .5A
Ambient Temp   °C -40 to 125 °C

Parametrics

Compare all products in Buck converters (integrated switch) Email Download to Excel
Part number Order 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 Package size: mm2:W x L (PKG)
LM22674 Order now 4.5     42     1.285     37     0.5     1     500     500     3.4     Enable
Over Current Protection    
Voltage Mode     90     -40 to 125     Catalog     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
LM22675 Order now 4.5     42     1.285     37     1     1     500     500     3.4     Enable
Over Current Protection    
Voltage Mode     90     -40 to 125     Catalog     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
LM22675-Q1 Order now 4.5     42     1.285     37     1     1     500     500     3.4     Enable
Over Current Protection    
Voltage Mode     90     -40 to 125     Automotive     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
LM22676 Order now 4.5     42     1.285     37     3     1     500     500     3.4     Enable
Over Current Protection    
Voltage Mode     90     -40 to 125     Catalog     SO PowerPAD | 8
TO-263 | 7    
Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
7TO-263: 142 mm2: 14.01 x 10.16 (TO-263 | 7)