LM22680 SIMPLE SWITCHER® 4.5V to 42V, 2A Step-Down DC/DC Switching Regulator with Precision Enable | TI.com

LM22680 (ACTIVE)

SIMPLE SWITCHER® 4.5V to 42V, 2A Step-Down DC/DC Switching Regulator with Precision Enable

 

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Description

The LM22680 switching regulator provides all of the functions necessary to implement an efficient high-oltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42-V N-channel MOSFET switch that can provide up to 2 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. The default switching frequency is set at 500 kHz, thus allowing for small external components and good transient response. In addition, the frequency can be adjusted over a range of 200 kHz to 1 MHz with a single external resistor. The internal oscillator can be synchronized to a system clock or to the oscillator of another regulator. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typical). An adjustable soft-start feature is provided through the selection of a single external capacitor. The LM22680 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22680 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 Option:
    -ADJ (Outputs as Low as 1.285 V)
  • ±1.5% Feedback Reference Accuracy
  • 500-kHz Default Switching Frequency
  • Adjustable Switching Frequency and
    Synchronization
  • –40°C to 125°C Operating Junction Temperature
    Range
  • Precision Enable Pin
  • Integrated Boot-Strap Diode
  • Adjustable Soft-Start
  • Fully WEBENCH® Enabled
  • LM22680-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)

View more

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
Package size: mm2:W x L (PKG)
LM22680 LM22671 LM22672 LM22675 LM22676 LM22680-Q1
4.5     4.5     4.5     4.5     4.5     4.5    
42     42     42     42     42     42    
1.285     1.285     1.285     1.285     1.285     1.285    
37     37     37     37     37     37    
2     0.5     1     1     3     2    
1     1     1     1     1     1    
200     200     200     500     500     200    
1000     1000     1000     500     500     1000    
3.4     3.4     3.4     3.4     3.4     3.4    
Enable
Frequency Synchronization
Over Current Protection    
Enable
Frequency Synchronization
Over Current Protection    
Enable
Frequency Synchronization
Over Current Protection    
Enable
Over Current Protection    
Enable
Over Current Protection    
Enable
Frequency Synchronization
Over Current Protection    
Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode     Voltage Mode    
90     90     90     90     90     90    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog     Catalog     Catalog     Automotive    
SO PowerPAD | 8     SO PowerPAD | 8     SO PowerPAD | 8     SO PowerPAD | 8     SO PowerPAD | 8
TO-263 | 7    
SO PowerPAD | 8    
Converter     Converter     Converter     Converter     Converter     Converter    
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
7TO-263: 142 mm2: 14.01 x 10.16 (TO-263 | 7)    
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    

Design tool

New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LM22680

  Min   Max Range
Vin  V 4.5 to 42.0V
Vout  V 1.285 to 37V
Iout  A ≤ 2A
Ambient Temp  °C -40 to 125°C