LM22680-Q1 2A SIMPLE SWITCHER®, Step-Down Voltage Regulator with Precision Enable | TI.com

LM22680-Q1 (ACTIVE)

2A SIMPLE SWITCHER®, Step-Down Voltage Regulator with Precision Enable

 

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  • LM43602-Q1  -  3.5 to 36V, 2A synchronous step-down voltage regulator - high efficiency, low quiescent current, smaller solution size

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)

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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
Package size: mm2:W x L (PKG)
LM22680-Q1 LM22671 LM22671-Q1 LM22672 LM22672-Q1 LM22673-Q1 LM22674-Q1 LM22675 LM22676 LM22676-Q1 LM22677-Q1 LM22678-Q1 LM22679-Q1 LM22680 LM53602-Q1 LMR14020-Q1 TPS54240-Q1
4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5     4.5     3.5     4     3.5    
42     42     42     42     42     42     42     42     42     42     42     42     42     42     42     40     42    
1.285     1.285     1.285     1.285     1.285     1.285     1.285     1.285     1.285     1.285     1.285     1.285     1.285     1.285     3.2     0.8     0.8    
37     37     37     37     37     37     37     37     37     37     37     37     37     37     9.9     28     39    
2     0.5     0.5     1     1     3     0.5     1     3     3     5     5     5     2     2     2     2.5    
1     1     1     1     1     1     1     1     1     1     1     1     1     1     1     1     1    
200     200     200     200     200     500     500     500     500     500     200     500     500     200     1850     200     100    
1000     1000     1000     1000     1000     500     500