Moteur de recherche de fiches techniques de composants électroniques
Selected language     French  ▼
Nom de la pièce
         Description


LM2612BL Datasheet(Fiches technique) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Numéro de pièce LM2612BL
Description  400mA Sub-miniature, Programmable, Step-Down DC-DC Converter for Ultra Low-Voltage Circuits
Télécharger  19 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo 

 
 1 page
background image
LM2612BL
400mA Sub-miniature, Programmable, Step-Down DC-DC
Converter for Ultra Low-Voltage Circuits
General Description
The LM2612 step-down DC-DC converter is optimized for
powering ultra-low voltage circuits from a single Lithium-Ion
cell. It provides up to 400mA (300mA for B grade), over an
input voltage range of 2.8V to 5.5V. Pin programmable out-
put voltages of 1.05V, 1.3V, 1.5V or 1.8V allow adjustment
for MPU voltage options without board redesign or external
feedback resistors.
The device has three pin-selectable modes for maximizing
battery life in mobile phones and similar portable applica-
tions. Low-noise PWM mode offers 600kHz fixed-frequency
operation to reduce interference in RF and data acquisition
applications during full-power operation. In PWM mode, in-
ternal synchronous rectification provides high efficiency
(91% typ. at 1.8V
OUT). A SYNC input allows synchronizing
the switching frequency in a range of 500kHz to 1MHz to
avoid noise from intermodulation with system frequencies.
Low-current hysteretic PFM mode reduces quiescent current
to 160 µA (typ.) during system standby. Shutdown mode
turns the device off and reduces battery consumption to
0.02µA (typ.). Additional features include soft start and cur-
rent overload protection.
The LM2612 is available in a 10 pin micro SMD packge. This
package uses National’s wafer level chip-scale micro SMD
technology and offers the smallest possible size. Only three
small external surface-mount components, an inductor and
two ceramic capacitors are required.
Key Specifications
n
Operates from a single LiION cell (2.8V to 5.5V)
n
Internal synchronous rectification for high PWM mode
efficiency
n
Pin programmable output voltage (1.05V, 1.3V, 1.5V and
1.8V)
n
400mA maximum load capability (300mA for B grade)
n ±
2% PWM mode DC output voltage precision
n
5mV typ PWM mode output voltage ripple
n
160 µA typ PFM mode quiescent current
n
0.02µA typ shutdown mode current
n
600kHz PWM mode switching frequency
n
SYNC input for PWM mode frequency synchronization
from 500kHz to 1MHz
Features
n
Sub-miniature 10-pin micro SMD package
n
Only three tiny surface-mount external components
required
n
Uses small ceramic capacitors
n
Internal soft start
n
Current overload protection
n
No external compensation required
n
Thermal shutdown protection
Applications
n
Mobile Phones
n
Hand-Held Radios
n
Battery Powered Devices
Typical Application Circuit
20041802
December 2002
© 2002 National Semiconductor Corporation
DS200418
www.national.com




Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19 


Datasheet Download



Numéro de composants électroniques

Numéro de pièceDescription des composantsHtml ViewFabricant
LM2612400mA Sub-miniature Programmable Step-Down DC-DC Converter for Ultra Low-Voltage Circuits 1 2 3 4 5 MoreNational Semiconductor (TI)
LM3670Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits 1 2 3 4 5 MoreNational Semiconductor (TI)
LM2614400mA Sub-Miniature Adjustable DC-DC Converter Optimized for RF Power Amplifiers 1 2 3 4 5 MoreNational Semiconductor (TI)
LM2618400mA Sub-miniature High Efficiency Synchronous PWM & PFM Programmable DC-DC Converter 1 2 3 4 5 MoreNational Semiconductor (TI)
LM2608400mA Sub-miniature High Efficiency Programmable DC-DC Converter with Linear Mode 1 2 3 4 5 MoreNational Semiconductor (TI)
LM2706Miniature Variable Step-Down DC-DC Converter with Bypass for RF Power Amplifiers 1 2 3 4 5 MoreNational Semiconductor (TI)
LM3203Step-Down DC-DC Converter with Bypass Mode for CDMA / WCDMA RF Power Amplifiers 1 2 3 4 5 MoreNational Semiconductor (TI)
LM3207650mA Miniature Adjustable Step-Down DC-DC Converter for RF Power Amplifiers with Integrated Vref LDO 1 2 3 4 5 MoreNational Semiconductor (TI)
RC5050Programmable DC-DC Converter for Lo Voltage 1 2 3 4 5 MoreList of Unclassifed Manufacturers
LM3202650mA Miniature Adjustable Step-Down DC-DC Converter for RF Power Amplifiers 1 2 3 4 5 MoreNational Semiconductor (TI)

Lien URL

AllDATASHEET vous a-t-il été utile ?   [ DONATE ]  

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Favoris   |   Echange de liens   |   Fabricants
All Rights Reserved © Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl