LM2595 SIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator | TI.com

LM2595 (ACTIVE)

SIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator

 

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  • LM43601  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   Synchronous 36V, 1A Regulator - Higher efficiency, Low Quiescent Current, Smaller Solution Size

Description

The LM2595 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed-frequency oscillator.

The LM2595 series operates at a switching frequency of 150 kHz, thus allowing smaller-sized filter components than what would be needed with lower-frequency switching regulators. Available in a standard 5-pin TO-220 package with several different lead bend options, and a 5-pin TO-263 surface-mount package. Typically, for output voltages less than
12 V, and ambient temperatures less than 50°C, no heat sink is required.

A standard series of inductors are available from several different manufacturers optimized for use with the LM2595 series. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 85-µA stand-by current. Self protection features include a two stage frequency reducing current limit for the output switch and an overtemperature shutdown for complete protection under fault conditions.

Features

  • 3.3-V, 5-V, 12-V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range, 1.2 V
    to 37 V ±4% Maximum Over Line and Load
    Conditions
  • Available in TO-220 and TO-263 Surface-Mount
    Packages
  • Ensured 1-A Output Load Current
  • Input Voltage Range Up to 40 V
  • Requires Only 4 External Components
  • Excellent Line and Load Regulation Specifications
  • 150-kHz Fixed-Frequency Internal Oscillator
  • TTL Shutdown Capability
  • Low Power Standby Mode, IQ, Typically 85 µA
  • High Efficiency
  • Uses Readily Available Standard Inductors
  • Thermal Shutdown and Current-Limit Protection

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
LM2595 LM2591HV LM2651 LM2734
4.5     4.5     4     3    
40     60     14     20    
3.3     3.3     3.3     0.8    
37     57     13     18    
1     1     1.5     1    
1     1     1     1    
110     110     255     400    
173     173     345     1900    
5     1     1.6     2.1    
Enable     Enable     UVLO Adjustable     Enable
Light Load Efficiency
Pre-Bias Start-Up    
Voltage Mode     Voltage Mode     Voltage Mode     Current Mode    
100     100     95     96    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog     Catalog    
DDPAK/TO-263 | 5
TO-220 | 5    
DDPAK/TO-263 | 5
TO-220 | 5    
TSSOP | 16     SOT-23-THIN | 6    
Converter     Converter     Converter     Converter    

Design tool

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

WEBENCH® Designer LM2595

  Min   Max Range
Vin  V 4.5 to 40.0V
Vout  V 1.23 to 40V
Iout  A ≤ 1A
Ambient Temp  °C -40 to 125°C


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