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LT3473EDD#TR

Description
LT3473 - Micropower 1A Boost Converter with Schottky and Output Disconnect; Package: DFN; Pins: 8; Temperature Range: -40°C to 85°C
CategoryPower/power management    The power supply circuit   
File Size262KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LT3473EDD#TR Overview

LT3473 - Micropower 1A Boost Converter with Schottky and Output Disconnect; Package: DFN; Pins: 8; Temperature Range: -40°C to 85°C

LT3473EDD#TR Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeDFN
package instruction3 X 3 MM, PLASTIC, MO-229-WEED, DFN-8
Contacts8
Manufacturer packaging codeDD
Reach Compliance Codenot_compliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
Maximum input voltage16 V
Minimum input voltage2.2 V
Nominal input voltage3 V
JESD-30 codeS-PDSO-N8
JESD-609 codee0
length3 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current1.2 A
Package body materialPLASTIC/EPOXY
encapsulated codeHVSSON
Package shapeSQUARE
Package formSMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)255
Certification statusNot Qualified
Maximum seat height0.8 mm
surface mountYES
Switch configurationBOOST
Maximum switching frequency1400 kHz
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
width3 mm
LT3473/LT3473A
Micropower 1A Boost
Converter with Schottky
and Output Disconnect
FEATURES
DESCRIPTIO
Tiny Solution Size
Low Quiescent Current:
150µA in Active Mode (V
IN
= 3.6V, V
OUT
= 15V,
No Load)
1µA in Shutdown Mode
Internal 1A, 36V Switch
Integrated Schottky Diode
Integrated PNP Output Disconnect
Internal Reference Override Pin
PGOOD Pin
25V at 80mA from 3.6V Input
Auxiliary NPNs for Intermediate
Bias Voltages (LT3473A)
Automatic Burst Mode
®
Operation at Light Load
Constant Switching Frequency: 1.2MHz
Thermal Shutdown
Input Range: 2.2V to 16V
Low Profile (3mm
×
3mm) DFN Package (LT3473)
Low Profile (4mm
×
3mm) DFN Package (LT3473A)
The LT
®
3473/LT3473A are micropower step-up DC/DC
converters with integrated Schottky diode and output
disconnect circuitry in low profile DFN packages. The
small package size, high level of integration and the use of
tiny SMT components yield a solution size of less than
50mm
2
. The internal 1A switch allows the device to deliver
25V at up to 80mA from a Li-Ion cell, while automatic Burst
Mode operation maintains efficiency at light load. An
auxiliary reference input (CTRL) allows the user to over-
ride the internal 1.25V feedback reference with any lower
value, allowing full control of the output voltage during
operation. A PGOOD pin sinks current when the output
voltage reaches 90% of final value.
The LT3473A includes two NPN transistors for generating
intermediate bias voltages from the output and is offered
in a 12-lead (4mm
×
3mm) DFN package. The LT3473
does not include these NPNs and is offered in an 8-lead
(3mm
×
3mm) package.
The rugged 36V switch and output disconnect circuitry
allow outputs up to 34V to be easily generated in a simple
boost topology.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIO S
OLED Bias
CCD Bias
TYPICAL APPLICATIO
PGOOD
CTRL
V
IN
3V TO 4.2V
6.8µH
SW
V
IN
SHDN
4.7µF
GND
LT3473
Conversion Efficiency and Power Loss vs Output Current
80
V
OUT
25V
2.2µF 80mA
V
IN
= 3.6V
V
OUT
= 15V
OUT
75
EFFICIENCY (%)
70
CAP
2M
FB
100k
3473 TA01a
65
0.47µF
60
55
0.1
U
500
400
POWER LOSS (mW)
U
U
300
200
100
10
1
OUTPUT CURRENT (mA)
0
100
3473 TA01b
3473f
1

LT3473EDD#TR Related Products

LT3473EDD#TR LT3473AEDE#TR
Description LT3473 - Micropower 1A Boost Converter with Schottky and Output Disconnect; Package: DFN; Pins: 8; Temperature Range: -40°C to 85°C LT3473 - Micropower 1A Boost Converter with Schottky and Output Disconnect; Package: DFN; Pins: 12; Temperature Range: -40°C to 85°C
Brand Name Linear Technology Linear Technology
Is it Rohs certified? incompatible incompatible
Maker Linear ( ADI ) Linear ( ADI )
Parts packaging code DFN DFN
package instruction 3 X 3 MM, PLASTIC, MO-229-WEED, DFN-8 HVSSON,
Contacts 8 12
Manufacturer packaging code DD DE/UE
Reach Compliance Code not_compliant compliant
ECCN code EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR
Maximum input voltage 16 V 16 V
Minimum input voltage 2.2 V 2.2 V
Nominal input voltage 3 V 3 V
JESD-30 code S-PDSO-N8 R-PDSO-N12
JESD-609 code e0 e0
length 3 mm 4 mm
Humidity sensitivity level 1 1
Number of functions 1 1
Number of terminals 8 12
Maximum operating temperature 70 °C 70 °C
Maximum output current 1.2 A 1.2 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HVSSON HVSSON
Package shape SQUARE RECTANGULAR
Package form SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 255 255
Certification status Not Qualified Not Qualified
Maximum seat height 0.8 mm 0.8 mm
surface mount YES YES
Switch configuration BOOST BOOST
Maximum switching frequency 1400 kHz 1400 kHz
Temperature level COMMERCIAL COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm
Terminal location DUAL DUAL
Maximum time at peak reflow temperature 40 40
width 3 mm 3 mm
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