DataSheetWiki


LM2578A fiches techniques PDF

National Semiconductor - Switching Regulator

Numéro de référence LM2578A
Description Switching Regulator
Fabricant National Semiconductor 
Logo National Semiconductor 





1 Page

No Preview Available !





LM2578A fiche technique
April 1998
LM1578A/LM2578A/LM3578A
Switching Regulator
General Description
The LM1578A is a switching regulator which can easily be
set up for such DC-to-DC voltage conversion circuits as the
buck, boost, and inverting configurations. The LM1578A fea-
tures a unique comparator input stage which not only has
separate pins for both the inverting and non-inverting inputs,
but also provides an internal 1.0V reference to each input,
thereby simplifying circuit design and p.c. board layout. The
output can switch up to 750 mA and has output pins for its
collector and emitter to promote design flexibility. An external
current limit terminal may be referenced to either the ground
or the Vin terminal, depending upon the application. In addi-
tion, the LM1578A has an on board oscillator, which sets the
switching frequency with a single external capacitor from <1
Hz to 100 kHz (typical).
The LM1578A is an improved version of the LM1578, offer-
ing higher maximum ratings for the total supply voltage and
output transistor emitter and collector voltages.
Features
n Inverting and non-inverting feedback inputs
n 1.0V reference at inputs
n Operates from supply voltages of 2V to 40V
n Output current up to 750 mA, saturation less than 0.9V
n Current limit and thermal shut down
n Duty cycle up to 90%
Applications
n Switching regulators in buck, boost, inverting, and
single-ended transformer configurations
n Motor speed control
n Lamp flasher
Functional Diagram
© 1998 National Semiconductor Corporation DS008711
DS008711-1
www.national.com

PagesPages 18
Télécharger [ LM2578A ]


Fiche technique recommandé

No Description détaillée Fabricant
LM2578A Switching Regulator National Semiconductor
National Semiconductor
LM2578A LM2578A/LM3578A Switching Regulator (Rev. E) Texas Instruments
Texas Instruments

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche