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LTC3406B-2ES5

Description
2.25MHz, 600mA Synchronous Step-Down Regulator in ThinSOT
CategoryPower/power management    The power supply circuit   
File Size214KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LTC3406B-2ES5 Overview

2.25MHz, 600mA Synchronous Step-Down Regulator in ThinSOT

LTC3406B-2ES5 Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSOT
package instructionVSSOP, TSOP5/6,.11,37
Contacts5
Manufacturer packaging codeS5
Reach Compliance Code_compli
ECCN codeEAR99
Is SamacsysN
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage5.5 V
Minimum input voltage2.5 V
Nominal input voltage3.6 V
JESD-30 codeR-PDSO-G5
JESD-609 codee0
length2.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals5
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current1.3 A
Package body materialPLASTIC/EPOXY
encapsulated codeVSSOP
Encapsulate equivalent codeTSOP5/6,.11,37
Package shapeRECTANGULAR
Package formSMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency2700 kHz
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.95 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width1.625 mm
Base Number Matches1
LTC3406B-2
2.25MHz, 600mA
Synchronous Step-Down
Regulator in ThinSOT
TM
FEATURES
DESCRIPTIO
High Efficiency: Up to 96%
600mA Output Current at V
IN
= 3V
2.5V to 5.5V Input Voltage Range
2.25MHz Constant Frequency Operation
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
Low Quiescent Current: 350µA
0.6V Reference Allows Low Output Voltages
Shutdown Mode Draws < 1µA Supply Current
Current Mode Operation for Excellent Line and
Load Transient Response
Overtemperature Protected
Low Profile (1mm) SOT-23 Package
The LTC
®
3406B-2 is a high efficiency monolithic synchro-
nous buck regulator using a constant frequency, current
mode architecture. Supply current with no load is 350µA,
dropping to <1µA in shutdown. The 2.5V to 5.5V input
voltage range makes the LTC3406B-2 ideally suited for
single Li-Ion battery-powered applications. 100% duty
cycle capability provides low dropout operation, extend-
ing battery life in portable systems. PWM pulse skipping
mode operation provides very low output ripple voltage for
noise sensitive applications.
The switching frequency is internally set at 2.25MHz, allow-
ing the use of tiny surface mount inductors and capacitors.
The internal synchronous switch increases efficiency and
eliminates the need for an external Schottky diode. Low
output voltages are easily supported with the 0.6V feedback
reference voltage. The LTC3406B-2 is available in a low pro-
file (1mm) SOT-23 package. Refer to LTC3406 for appli-
cations that require Burst Mode
®
operation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
Protected by U.S. Patents, including 6580258, 5481178.
APPLICATIO S
Cellular Telephones
Personal Information Appliances
Wireless and DSL Modems
Digital Still Cameras
MP3 Players
Portable Instruments
TYPICAL APPLICATIO
High Efficiency Step-Down Converter
100
V
IN
2.7V
TO 5.5V
2.2µH*
V
IN
4.7µF
CER
SW
22pF
1M
10µF
CER
V
OUT
1.8V
600mA
90
80
V
OUT
= 1.8V
T
A
= 25°C
LTC3406B-2
RUN
GND
V
FB
EFFICIENCY (%)
70
60
50
40
30
20
10
0.1
V
IN
= 4.2V
1
100
10
OUTPUT CURRENT (mA)
1000
3406B TA01b
499k
3406B TA01a
U
Efficiency vs Load Current
V
IN
= 3.6V
V
IN
= 2.7V
sn3406b2 3406b2fs
U
U
1

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