Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

LTC1149 Datasheet(PDF) 1 Page - Linear Technology

Part # LTC1149
Description  High Efficiency Synchronous Step-Down Switching Regulators
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1149 Datasheet(HTML) 1 Page - Linear Technology

  LTC1149_15 Datasheet HTML 1Page - Linear Technology LTC1149_15 Datasheet HTML 2Page - Linear Technology LTC1149_15 Datasheet HTML 3Page - Linear Technology LTC1149_15 Datasheet HTML 4Page - Linear Technology LTC1149_15 Datasheet HTML 5Page - Linear Technology LTC1149_15 Datasheet HTML 6Page - Linear Technology LTC1149_15 Datasheet HTML 7Page - Linear Technology LTC1149_15 Datasheet HTML 8Page - Linear Technology LTC1149_15 Datasheet HTML 9Page - Linear Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 1 / 20 page
background image
1
LTC1149
LTC1149-3.3/LTC1149-5
S
FEATURE
DESCRIPTIO
s
Operation to 48V Input Voltage
s
Ultrahigh Efficiency: Up to 95%
s
Current Mode Operation for Excellent Line and
Load Transient Response
s
High Efficiency Maintained over Wide Current Range
s
Logic-Controlled Micropower Shutdown
s
Short-Circuit Protection
s
Very Low Dropout Operation: 100% Duty Cycle
s
Synchronous FET Switching for High Efficiency
s
Adaptive Nonoverlap Gate Drives
s
Available in 16-Pin Narrow SO Package
The LTC
®1149 series is a family of synchronous step-
down switching regulator controllers featuring automatic
Burst Mode
TM operation to maintain high efficiencies at
low output currents. These devices drive external comple-
mentary power MOSFETs at switching frequencies up
to 250kHz using a constant off-time current-mode archi-
tecture.
Special onboard regulation and level-shift circuitry allow
operation at input voltages from dropout to 48V (60V
absolute max). The constant off-time architecture main-
tains constant ripple current in the inductor, easing the
design of wide input range converters. Current mode
operation provides excellent line and load transient
response. The operating current level is user-program-
mable via an external current sense resistor.
The LTC1149 series incorporates automatic power saving
Burst Mode operation when load currents drop below the
level required for continuous operation. Standby power is
reduced to only about 8mW at VIN = 12V. In shutdown,
both MOSFETs are turned off.
High Efficiency Synchronous
Step-Down Switching Regulators
Figure 1. High Efficiency Step-Down Regulator
APPLICATI
TYPICAL
0.068
µF
VIN
CAP
PDRIVE
LTC1149-5
SHDN1
ITH
CT
SGND
PGATE
VCC
VCC
SHDN2
SENSE
SENSE+
P, RGNDS
NGATE
1000pF
N-CHANNEL
IRFR024
0.047
µF
1N4148
1N4148
VIN
P-CHANNEL
IRFR9024
D1
1N5819
L*
62
µH
RSENSE**
0.05
VOUT
5V/2A
COUT
220
µF
CIN
100
µF
100V
3.3
µF
0V = NORMAL
>2V = SHUTDOWN
3300
µF
CT
470pF
1k
1149 F01
*COILTRONICS CTX62-2-MP
**KRL SL-1-C1-0R050J
+
+
+
LOAD CURRENT (A)
0.02
60
70
80
100
0.2
2
1149 TA01
90
VIN = 12V
VIN = 24V
FIGURE 1 CIRCUIT
LTC1149-5 Efficiency
s
Notebook and Palmtop Computers
s
Portable Instruments
s
Battery-Operated Digital Devices
s
Industrial Power Distribution
s
Avionics Systems
s
Telecom Power Supplies
S
APPLICATI
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.


Similar Part No. - LTC1149_15

ManufacturerPart #DatasheetDescription
logo
Linear Technology
LTC1149-3.3 LINER-LTC1149-3.3 Datasheet
389Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1149-3.3 LINER-LTC1149-3.3_15 Datasheet
333Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1149-5 LINER-LTC1149-5 Datasheet
389Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1149-5 LINER-LTC1149-5_15 Datasheet
333Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1149CN LINER-LTC1149CN Datasheet
389Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
More results

Similar Description - LTC1149_15

ManufacturerPart #DatasheetDescription
logo
Linear Technology
LTC1148 LINER-LTC1148 Datasheet
384Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1148-5 LINER-LTC1148-5_15 Datasheet
247Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1159 LINER-LTC1159_15 Datasheet
290Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1148 LINER-LTC1148_04 Datasheet
237Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1148 LINER-LTC1148_15 Datasheet
247Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1149-3.3 LINER-LTC1149-3.3_15 Datasheet
333Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1159 LINER-LTC1159 Datasheet
400Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
logo
Analog Devices
ADP1148 AD-ADP1148 Datasheet
191Kb / 16P
   High Efficiency Synchronous Step-Down Switching Regulators
REV. A
logo
Linear Technology
LTC1149-5 LINER-LTC1149-5_15 Datasheet
333Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1149 LINER-LTC1149 Datasheet
389Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : 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  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com