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Número de pieza | LM2596 | |
Descripción | 3A Step-Down Voltage Regulator | |
Fabricantes | HN | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de LM2596 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
No Preview Available ! LM2596
LM2596
3A Step-Down Voltage Regulator
GENARAL DESCRIPTION
The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-d own
(buck) s witching regul ator, ca pable of drivin g a 3A loa d with exc ellent li ne an d loa d regul ation. T hese devices ar e
available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version.
Requiring a minimum num ber of external compone nts, t hese regulat ors are simple to use and include inter nal
frequency compensation†, and a fixed-frequency oscillator.
The LM2596 series operates at a s witching frequency of 150 kHz thus allo wing smaller sized filter components than
what would be needed with lower frequency switching regulators. Available in a standar d 5-lead TO-220 package with
several different lead bend options, and a 5-lead TO-263 surface mount package.
A standard ser ies of inductor s are available from several different manufact urers optimized for use with the LM2596
series. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a guaranteed ± 4% t olerance on output voltage under specified input voltage and output load
conditions, and ± 15% on the osci llator fre quency. E xternal sh utdown is incl uded, feat uring t ypically 80 µ A stand by
current. Self protection featur es include a t wo stage frequency reducing current limit for the output s witch and an over
temperature shutdown for complete protection under fault conditions.
FEATURES
3.3V, 5V, 12V, and adjustable output versions
Adjustable v ersion output voltage range, 1.2V to
37V ±4% max over line and load conditions
Available in TO-220 and TO-263 packages
Guaranteed 3A output load current
Input voltage range up to 40V
Requires only 4 external components
Excellent line and load regulation specifications
150 kHz fixed frequency internal oscillator
TT L shutdown capability
Low power standby mode, IQ typically 80 µA
High efficiency
Uses readily available standard inductors
Thermal shutdown and current limit protection
APPLICATIONS
Simple high-efficiency step-down (buck) regulator
On-card switching regulators
Positive to negative converter
ORDERING INFORMATION
Output Voltage
3.3 5.0
12
LM2596S-3.3
LM2596S-5.0
LM2596S-12
LM2596T-3.3
LM2596T-5.0
LM2596T-12
PIN CONNECTION
Bent and Staggered Leads, Through Hole
Package
5-Lead TO-220 (T)
ADJ
LM2596S-ADJ
LM2596T-ADJ
Package
Type
TO-263
TO-220
Surface Mount Package
5-Lead TO-263 (S)
Order Number LM2596T-3.3, LM2596T-5.0,
LM2596T-12 or LM2596T-ADJ
1
Order Number LM2596S-3.3, LM2596S-5.0,
LM2596S-12 or LM2596S-ADJ
http://www.Datasheet4U.com
1 page TYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 1)
Normalized
Output Voltage
Line Regulation
LM2596
Efficiency
Switch Saturation
Voltage
Switch Current Limit
Dropout Voltage
Operating
Quiescent Current
Shutdown
Quiescent Current
Minimum Operating
Supply Voltage
ON /OFF Threshold
Voltage
ON /OFF Pin
Current (Sinking)
Switching Frequency
5
5 Page |
Páginas | Total 7 Páginas | |
PDF Descargar | [ Datasheet LM2596.PDF ] |
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