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LTC3561EDD#TRPBF

Description
IC REG BUCK ADJ 1A SYNC 8DFN
CategoryPower/power management    The power supply circuit   
File Size214KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC3561EDD#TRPBF Overview

IC REG BUCK ADJ 1A SYNC 8DFN

LTC3561EDD#TRPBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeDFN
package instructionHSON, SOLCC8,.11,20
Contacts8
Manufacturer packaging codeDD
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Maximum input voltage5.5 V
Minimum input voltage2.625 V
Nominal input voltage3.3 V
JESD-30 codeS-PDSO-N8
JESD-609 codee3
length3 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature
Maximum output current1.7 A
Package body materialPLASTIC/EPOXY
encapsulated codeHSON
Encapsulate equivalent codeSOLCC8,.11,20
Package shapeSQUARE
Package formSMALL OUTLINE, HEAT SINK/SLUG
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height0.8 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency4000 kHz
technologyCMOS
Temperature levelOTHER
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3 mm
LTC3561
1A, 4MHz, Synchronous
Step-Down DC/DC Converter
FEATURES
DESCRIPTIO
Uses Tiny Capacitors and Inductor
High Frequency Operation: Up to 4MHz
High Switch Current: 1.4A
Low R
DS(ON)
Internal Switches: 0.110Ω
High Efficiency: Up to 95%
V
IN
: 2.63V to 5.5V
Stable with Ceramic Capacitors
Current Mode Operation for Excellent Line
and Load Transient Response
Short-Circuit Protected
Low Dropout Operation: 100% Duty Cycle
Low Shutdown Current: I
Q
1µA
Low Quiescent Current: 240µA
Output Voltages from 0.8V to 5V
Low Noise Pulse-Skipping Operation
Small 8-Pin DFN Package
The LTC
®
3561 is a constant-frequency, synchronous,
step-down DC/DC converter. Intended for medium power
applications, it operates from a 2.63V to 5.5V input voltage
range and has a user configurable operating frequency up
to 4MHz, allowing the use of tiny, low cost capacitors and
inductors 2mm or less in height. The output voltage is
adjustable from 0.8V to 5V. Internal synchronous 0.11Ω
power switches with 1.4A peak current ratings provide
high efficiency. The LTC3561’s current mode architecture
and external compensation allow the transient response
to be optimized over a wide range of loads and output
capacitors.
To further maximize battery life, the P-channel MOSFET is
turned on continuously in dropout (100% duty cycle). The
no-load quiescent current is only 240µA. In shutdown, the
device draws <1µA.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 5481178, 6127815, 6304066, 6498466, 6580258, 6611131.
APPLICATIO S
Wireless LAN Power
Notebook Computers
Digital Cameras
Cellular Phones
Board Mounted Power Supplies
TYPICAL APPLICATIO
Step-Down 2.5V/1A Regulator
V
IN
2.63V TO 5.5V
22µF
PV
IN
EFFICIENCY (%)
Efficiency and Power Loss vs Load Current
100
95
90
85
80
75
70
65
10
V
IN
= 3.3V
V
OUT
= 2.5V
f
O
= 1MHz
100
LOAD CURRENT (mA)
POWER LOSS
EFFICIENCY
POWER LOSS (mW)
SV
IN
I
TH
13k
1000pF
324k
LTC3561
SW
2.2µH
887k
V
OUT
2.5V/1A
22µF
SHDN/R
T
SGND
PGND
V
FB
412k
60
55
NOTE: IN DROPOUT, THE OUTPUT TRACKS
THE INPUT VOLTAGE.
3561 F01
50
10
U
1000
100
1
1000
3561 TA01
U
U
3561f
1

LTC3561EDD#TRPBF Related Products

LTC3561EDD#TRPBF LTC3561EDD#PBF
Description IC REG BUCK ADJ 1A SYNC 8DFN IC REG BUCK ADJ 1A SYNC 8DFN
Brand Name Linear Technology Linear Technology
Is it Rohs certified? conform to conform to
Maker Linear ( ADI ) Linear ( ADI )
Parts packaging code DFN DFN
package instruction HSON, SOLCC8,.11,20 HSON, SOLCC8,.11,20
Contacts 8 8
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 2.625 V 2.625 V
Nominal input voltage 3.3 V 3.3 V
JESD-30 code S-PDSO-N8 S-PDSO-N8
JESD-609 code e3 e3
length 3 mm 3 mm
Humidity sensitivity level 1 1
Number of functions 1 1
Number of terminals 8 8
Maximum operating temperature 85 °C 85 °C
Maximum output current 1.7 A 1.7 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HSON HSON
Encapsulate equivalent code SOLCC8,.11,20 SOLCC8,.11,20
Package shape SQUARE SQUARE
Package form SMALL OUTLINE, HEAT SINK/SLUG SMALL OUTLINE, HEAT SINK/SLUG
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 4000 kHz 4000 kHz
technology CMOS CMOS
Temperature level OTHER OTHER
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
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