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LTC3541EDD-3#TRPBF

Description
IC REG DL BCK/LINEAR SYNC 10-DFN
CategoryPower/power management    The power supply circuit   
File Size535KB,22 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric Compare View All

LTC3541EDD-3#TRPBF Overview

IC REG DL BCK/LINEAR SYNC 10-DFN

LTC3541EDD-3#TRPBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
Parts packaging codeDFN
package instructionHVSON, SOLCC10,.12,20
Contacts10
Manufacturer packaging codeDD
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Maximum input voltage5.5 V
Minimum input voltage2.7 V
Nominal input voltage3.6 V
JESD-30 codeS-PDSO-N10
JESD-609 codee3
length3 mm
Humidity sensitivity level1
Number of functions1
Number of terminals10
Maximum operating temperature85 °C
Minimum operating temperature
Maximum output current1.25 A
Package body materialPLASTIC/EPOXY
encapsulated codeHVSON
Encapsulate equivalent codeSOLCC10,.12,20
Package shapeSQUARE
Package formSMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height0.8 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency2700 kHz
technologyCMOS
Temperature levelCOMMERCIAL EXTENDED
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3 mm
Base Number Matches1
LTC3541-3
High Efficiency
Buck + VLDO Regulator
FEATURES
n
DESCRIPTION
The
LTC
®
3541-3
combines a synchronous buck DC/DC
converter with a very low dropout linear regulator (VLDO™
regulator) and internal feedback resistor networks to
provide two output voltages from a single input voltage
with minimum external components. When configured
for dual output operation, the LTC3541-3’s auto start-up
feature will bring the 1.575V VLDO/linear regulator output
into regulation in a controlled manner prior to enabling the
1.8V buck output without the need for external pin control.
The 300mA VLDO/linear regulator output will source only
30mA until the buck output achieves regulation. The input
voltage range is ideally suited for applications powered
from a Li-Ion battery and 5V or 3.3V rails.
The synchronous buck converter provides a high efficiency
output, typically 90%. It can provide up to 500mA of output
current while switching at 2.25MHz, allowing the use of
small surface mount inductors and capacitors. A mode
select pin allows Burst Mode operation to be enabled for
higher efficiency at light load currents, or disabled for lower
noise, constant frequency operation.
The VLDO regulator provides a low noise, low voltage
output capable of providing up to 300mA of output current
using only a 2.2µF ceramic capacitor. The input supply
voltage of the VLDO regulator (LV
IN
) may come from the
buck regulator or a separate supply.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and VLDO is a
trademark of Linear Technology Corporation. All other trademarks are the property of their respective
owners. Protected by U.S. Patents, including 5481178, 6611131, 6304066, 6498466, 6580258.
n
n
n
n
n
n
n
n
n
n
n
n
n
High Efficiency 500mA Buck Plus 300mA VLDO
Regulator
n
Auto Start-Up Powers VLDO/Linear Regulator
Output Prior to Buck Output
Independent 500mA High Efficiency Buck
(V
IN
: 2.7V to 5.5V)
300mA VLDO Regulator with 30mA Standalone Mode
No External Schottky Diodes Required
Fixed Buck Output Voltage: 1.8V
VLDO Input Voltage Range (LV
IN
: 1.675V to 5.5V)
Fixed VLDO Output Voltage: 1.575V
Selectable Fixed Frequency, Pulse-Skip Operation
or Burst Mode
®
Operation
Short-Circuit Protected
Current Mode Operation for Excellent Line and Load
Transient Response
Shutdown Current: <3µA
Constant Frequency Operation: 2.25MHz
Low Dropout Buck Operation: 100% Duty Cycle
Small, Thermally Enhanced, 10-Lead (3mm × 3mm)
DFN Package
APPLICATIONS
n
n
n
n
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Digital Cameras
Cellular Phones
PC Cards
Wireless and DSL Modems
Other Portable Power Systems
TYPICAL APPLICATION
LTC3541-3 Typical Application
V
IN
3V TO 5.5V
10µF
2.2µH
ENBUCK
SW
V
IN
Buck (Burst) Efficiency vs Load Current
100
90
80
V
IN
= 3V
EFFICIENCY
0.1
POWER LOSS (W)
1
V
OUT1
1.8V
200mA
ENVLDO
MODE
EFFICIENCY (%)
70
60
50
40
30
20
10
0
1
10
100
LOAD CURRENT (mA)
POWER
LOSS
0.01
LTC3541-3
V
OUT2
1.575V
300mA
V
OUT
LV
IN
10µF
PGND
LV
OUT
GND
2.2µF
0.001
0.0001
1000
35413 TA01b
35413 TA01a
35413fd
For more information
www.linear.com/LTC3541-3
1

LTC3541EDD-3#TRPBF Related Products

LTC3541EDD-3#TRPBF LTC3541EDD-3#PBF
Description IC REG DL BCK/LINEAR SYNC 10-DFN IC REG DL BCK/LINEAR SYNC 10-DFN
Brand Name Linear Technology Linear Technology
Is it Rohs certified? conform to conform to
Parts packaging code DFN DFN
package instruction HVSON, SOLCC10,.12,20 HVSON, SOLCC10,.12,20
Contacts 10 10
Manufacturer packaging code DD DD
Reach Compliance Code compliant compliant
ECCN code EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR
control mode CURRENT-MODE CURRENT-MODE
Maximum input voltage 5.5 V 5.5 V
Minimum input voltage 2.7 V 2.7 V
Nominal input voltage 3.6 V 3.6 V
JESD-30 code S-PDSO-N10 S-PDSO-N10
JESD-609 code e3 e3
length 3 mm 3 mm
Humidity sensitivity level 1 1
Number of functions 1 1
Number of terminals 10 10
Maximum operating temperature 85 °C 85 °C
Maximum output current 1.25 A 1.25 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HVSON HVSON
Encapsulate equivalent code SOLCC10,.12,20 SOLCC10,.12,20
Package shape SQUARE SQUARE
Package form SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) 260 260
Certification status Not Qualified Not Qualified
Maximum seat height 0.8 mm 0.8 mm
surface mount YES YES
Switch configuration BUCK BUCK
Maximum switching frequency 2700 kHz 2700 kHz
technology CMOS CMOS
Temperature level COMMERCIAL EXTENDED COMMERCIAL EXTENDED
Terminal surface Matte Tin (Sn) Matte Tin (Sn)
Terminal form NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm
Terminal location DUAL DUAL
Maximum time at peak reflow temperature 30 30
width 3 mm 3 mm
Base Number Matches 1 1
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