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LTC3441EDE#TRPBF

Description
Conv DC-DC 2.4V to 5.5V Synchronous Non-Inverting/Inverting/Step Up/Step Down Single-Out 2.4V to 5.25V 1.2A 12-Pin DFN EP T/R
File Size244KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC3441EDE#TRPBF Overview

Conv DC-DC 2.4V to 5.5V Synchronous Non-Inverting/Inverting/Step Up/Step Down Single-Out 2.4V to 5.25V 1.2A 12-Pin DFN EP T/R

LTC3441EDE#TRPBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeSynchronous Non-Inverting|Inverting|Step Up|Step Down
Output TypeAdjustable
Switching Frequency (kHz)1150
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)2.4 to 5.25
Maximum Output Current (A)1.2
Minimum Input Voltage (V)2.4
Maximum Input Voltage (V)5.5
Operating Supply Voltage (V)2.4 to 5.5
Typical Quiescent Current (uA)520
Efficiency (%)95
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
PackagingTape and Reel
Pin Count12
Standard Package NameDFN
Supplier PackageDFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length4
Package Width3
PCB changed12
Lead ShapeNo Lead
FeaTures
n
n
n
n
n
LTC3441
High Current Micropower
Synchronous Buck-Boost
DC/DC Converter
DescripTion
The
LTC
®
3441
is a high efficiency, fixed frequency, buck-
boost DC/DC converter that operates efficiently from input
voltages above, below or equal to the output voltage. The
topology incorporated in the IC provides a continuous
transfer function through all operating modes, making
the product ideal for single lithium ion or multicell ap-
plications where the output voltage is within the battery
voltage range.
The device includes two 0.10Ω N-channel MOSFET
switches and two 0.11Ω P-channel switches. External
Schottky diodes are optional, and can be used for a mod-
erate efficiency improvement. The operating frequency
is internally set to 1MHz and can be synchronized up to
1.7MHz. Quiescent current is only 25µA in Burst Mode
operation, maximizing battery life in portable applica-
tions. Burst Mode operation is user controlled and can
be enabled by driving the MODE/SYNC pin high. If the
MODE/SYNC pin is driven low or with a clock, then fixed
frequency switching is enabled.
Other features include a 1µA shutdown, soft-start control,
thermal shutdown and current limit. The LTC3441 is
available in a thermally enhanced 12-lead (4mm
×
3mm)
DFN package.
n
n
n
n
n
n
n
n
Regulated Output with Input Above, Below or Equal
to the Output
Single Inductor, No Schottky Diodes
High Efficiency: Up to 95%
25µA Quiescent Current in Burst Mode
®
Operation
Up to 1.2A Continuous Output Current from a Single
Lithium-Ion
True Output Disconnect in Shutdown
2.4V to 5.5V Input Range
2.4V to 5.25V Output Range
1MHz Fixed Frequency Operation
Synchronizable Oscillator
Selectable Burst Mode or Fixed Frequency Operation
<1µA Quiescent Current in Shutdown
Small, Thermally Enhanced 12-Lead (4mm × 3mm)
DFN package
applicaTions
n
n
n
n
Handheld Computers
Handheld Instruments
MP3 Players
Digital Cameras
L,
LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Typical applicaTion
Li-Ion to 3.3V at 1A Buck-Boost Converter
L1
4.7µH
4
9
2.5V TO 4.2V
10
1
Li-Ion
*
C
IN
10µF
7
3
5
8
12
11
2
6
15k
1.5nF
100
V
OUT
3.3V
1A
EFFICIENCY (%)
340k
C
OUT
22µF
200k
95
90
85
80
75
70
65
60
55
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
C
IN
: TAIYO YUDEN JMK212BJ106MG
C
OUT
: TAIYO YUDEN JMK325BJ226MM
L1: TOKO A916CY-4R7M
3441 TA01
Efficiency vs V
IN
V
OUT
= 3.3V
I
OUT
= 200mA
SW1
PV
IN
V
IN
LTC3441
SW2
V
OUT
FB
V
C
PGND
I
OUT
= 1A
SHDN/SS
PGND
MODE/SYNC
GND
50
2.5
3
3.5
4
V
IN
(V)
4.5
5
5.5
3441 TA02
3441fc
For more information
www.linear.com/LTC3441
1

LTC3441EDE#TRPBF Related Products

LTC3441EDE#TRPBF LTC3441EDE#PBF
Description Conv DC-DC 2.4V to 5.5V Synchronous Non-Inverting/Inverting/Step Up/Step Down Single-Out 2.4V to 5.25V 1.2A 12-Pin DFN EP T/R Conv DC-DC 2.4V to 5.5V Synchronous Non-Inverting/Inverting/Step Up/Step Down Single-Out 2.4V to 5.25V 1.2A 12-Pin DFN EP Tube
EU restricts the use of certain hazardous substances Compliant Compliant
ECCN (US) EAR99 EAR99
Part Status Active Active
HTS 8542.39.00.01 8542.39.00.01
Type Synchronous Non-Inverting|Inverting|Step Up|Step Down Synchronous Non-Inverting|Inverting|Step Up|Step Down
Output Type Adjustable Adjustable
Switching Frequency (kHz) 1150 1150
Switching Regulator Yes Yes
Number of Outputs 1 1
Output Voltage (V) 2.4 to 5.25 2.4 to 5.25
Maximum Output Current (A) 1.2 1.2
Minimum Input Voltage (V) 2.4 2.4
Maximum Input Voltage (V) 5.5 5.5
Operating Supply Voltage (V) 2.4 to 5.5 2.4 to 5.5
Typical Quiescent Current (uA) 520 520
Efficiency (%) 95 95
Minimum Operating Temperature (°C) -40 -40
Maximum Operating Temperature (°C) 85 85
Supplier Temperature Grade Extended Extended
Packaging Tape and Reel Tube
Pin Count 12 12
Standard Package Name DFN DFN
Supplier Package DFN EP DFN EP
Mounting Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max)
Package Length 4 4
Package Width 3 3
PCB changed 12 12
Lead Shape No Lead No Lead
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