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LT3959EFE#PBF

Description
IC REG MULT CONFIG INV 38TSSOP
CategoryPower/power management    The power supply circuit   
File Size327KB,26 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LT3959EFE#PBF Overview

IC REG MULT CONFIG INV 38TSSOP

LT3959EFE#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeTSSOP
package instructionHTSSOP, TSSOP38,.25,20
Contacts38
Manufacturer packaging codeFE
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage40 V
Minimum input voltage1.6 V
Nominal input voltage12 V
JESD-30 codeR-PDSO-G38
JESD-609 codee3
length9.7 mm
Humidity sensitivity level1
Number of functions1
Number of terminals38
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Maximum output current8 A
Package body materialPLASTIC/EPOXY
encapsulated codeHTSSOP
Encapsulate equivalent codeTSSOP38,.25,20
Package shapeRECTANGULAR
Package formSMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Maximum seat height1.2 mm
surface mountYES
Switch configurationBOOST
Maximum switching frequency1000 kHz
technologyBIPOLAR
Temperature levelAUTOMOTIVE
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width4.4 mm
Base Number Matches1
FeaTures
n
n
LT3959
Wide Input Voltage Range
Boost/SEPIC/Inverting Converter
with 6A, 40V Switch
DescripTion
The
LT
®
3959
is a wide input range, current mode, DC/DC
controller which is capable of regulating either positive or
negative output voltages from a single feedback pin. It can
be configured as a boost, SEPIC or inverting converter.
It features an internal low side N-channel MOSFET rated
for 6A at 40V and driven from an internal regulated sup-
ply provided from V
IN
or DRIVE. The fixed frequency,
current-mode architecture results in stable operation over
a wide range of supply and output voltages. The operating
frequency of LT3959 can be set over a 100kHz to 1MHz
range with an external resistor, or can be synchronized
to an external clock using the SYNC pin.
The LT3959 features soft-start and frequency foldback
functions to limit inductor current during start-up and
output short-circuit. A window comparator on the FBX
pin reports via the
PGOOD
pin, providing output voltage
status indication.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents, including 7825665.
n
n
n
n
n
n
n
n
n
Wide V
IN
Range: 1.6V (2.5V Start-Up) to 40V
Positive or Negative Output Voltage Programming
with a Single Feedback Pin
PGOOD
Output Voltage Status Report
Internal 6A/40V Power Switch
Programmable Soft-Start
Programmable Operating Frequency (100kHz to 1MHz)
with One External Resistor
Synchronizable to an External Clock
Low Shutdown Current < 1µA
INTV
CC
Regulator Supplied from V
IN
or DRIVE
Programmable Input Undervoltage Lockout with
Hysteresis
Thermally Enhanced QFN (5mm × 6mm) and TSSOP
Packages
Automotive
Telecom
Industrial
applicaTions
n
n
n
Typical applicaTion
2.5V to 24V Input, 12V Output SEPIC Converter
Excellent for Automotive 12V Post Regulator
L1A
C
IN
22µF
50V
×2
150k
4.7µF
50V
100
V
OUT
12V
500mA AT V
IN
= 2.5V
1.5A AT V
IN
> 8V
95
90
EFFICIENCY (%)
85
80
75
70
DRIVE
SYNC
RT
SS
V
C
27.4k
300kHz
0.1µF
7.5k
22nF
4.7µF
3959 TA01a
Efficiency vs Output Current
V
IN
= 12V
V
IN
2.5V TO
24V
124k
V
IN
EN_UVLO
SW
L1B
121k
C
OUT
47µF
16V
×2
LT3959
PGOOD
GND
TIE TO SGND
IF NOT USED
65
105K
60
0
800
600
200
400
OUTPUT CURRENT (mA)
1000
3959 TA01b
FBX
SGND GNDK INTV
CC
15.8K
3959fa
For more information
www.linear.com/LT3959
1

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Description IC REG MULT CONFIG INV 38TSSOP IC REG MULT CONFIG INV 38TSSOP IC REG MULT CONFIG INV 38TSSOP IC REG MULT CONFIG INV ADJ 36QFN IC REG MULT CONFIG INV ADJ 36QFN IC REG MULT CONFIG INV 38TSSOP IC REG MULT CONFIG INV ADJ 36QFN IC REG MULT CONFIG INV ADJ 36QFN
Brand Name Linear Technology Linear Technology - Linear Technology Linear Technology - Linear Technology Linear Technology
Is it Rohs certified? conform to conform to - conform to conform to - conform to conform to
Maker Linear ( ADI ) Linear ( ADI ) - Linear ( ADI ) Linear ( ADI ) - Linear ( ADI ) Linear ( ADI )
Parts packaging code TSSOP TSSOP - QFN QFN - QFN QFN
package instruction HTSSOP, TSSOP38,.25,20 HTSSOP, TSSOP38,.25,20 - HVQCCN, LCC28/36,.19X.23,20 HVQCCN, LCC28/36,.19X.23,20 - HVQCCN, LCC28/36,.19X.23,20 HVQCCN, LCC28/36,.19X.23,20
Contacts 38 38 - 36 36 - 36 36
Manufacturer packaging code FE FE - UHE UHE - UHE UHE
Reach Compliance Code compliant compliant - compliant compliant - compliant compliant
ECCN code EAR99 EAR99 - EAR99 EAR99 - EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR - SWITCHING REGULATOR SWITCHING REGULATOR - SWITCHING REGULATOR SWITCHING REGULATOR
control mode CURRENT-MODE CURRENT-MODE - CURRENT-MODE CURRENT-MODE - CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION - PULSE WIDTH MODULATION PULSE WIDTH MODULATION - PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 40 V 40 V - 40 V 40 V - 40 V 40 V
Minimum input voltage 1.6 V 1.6 V - 1.6 V 1.6 V - 1.6 V 1.6 V
Nominal input voltage 12 V 12 V - 12 V 12 V - 12 V 12 V
JESD-30 code R-PDSO-G38 R-PDSO-G38 - R-PQCC-N28 R-PQCC-N28 - R-PQCC-N28 R-PQCC-N28
JESD-609 code e3 e3 - e3 e3 - e3 e3
length 9.7 mm 9.7 mm - 6 mm 6 mm - 6 mm 6 mm
Humidity sensitivity level 1 1 - 1 1 - 1 1
Number of functions 1 1 - 1 1 - 1 1
Number of terminals 38 38 - 28 28 - 28 28
Maximum operating temperature 125 °C 125 °C - 125 °C 125 °C - 125 °C 125 °C
Minimum operating temperature -40 °C -40 °C - -40 °C -40 °C - -40 °C -40 °C
Maximum output current 8 A 8 A - 8 A 8 A - 8 A 8 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY - PLASTIC/EPOXY PLASTIC/EPOXY - PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HTSSOP HTSSOP - HVQCCN HVQCCN - HVQCCN HVQCCN
Encapsulate equivalent code TSSOP38,.25,20 TSSOP38,.25,20 - LCC28/36,.19X.23,20 LCC28/36,.19X.23,20 - LCC28/36,.19X.23,20 LCC28/36,.19X.23,20
Package shape RECTANGULAR RECTANGULAR - RECTANGULAR RECTANGULAR - RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH - CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE - CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) NOT SPECIFIED NOT SPECIFIED - NOT SPECIFIED NOT SPECIFIED - NOT SPECIFIED NOT SPECIFIED
Certification status Not Qualified Not Qualified - Not Qualified Not Qualified - Not Qualified Not Qualified
Maximum seat height 1.2 mm 1.2 mm - 0.8 mm 0.8 mm - 0.8 mm 0.8 mm
surface mount YES YES - YES YES - YES YES
Switch configuration BOOST BOOST - BOOST BOOST - BOOST BOOST
Maximum switching frequency 1000 kHz 1000 kHz - 1000 kHz 1000 kHz - 1000 kHz 1000 kHz
technology BIPOLAR BIPOLAR - BIPOLAR BIPOLAR - BIPOLAR BIPOLAR
Temperature level AUTOMOTIVE AUTOMOTIVE - AUTOMOTIVE AUTOMOTIVE - AUTOMOTIVE AUTOMOTIVE
Terminal surface Matte Tin (Sn) Matte Tin (Sn) - Matte Tin (Sn) Matte Tin (Sn) - Matte Tin (Sn) Matte Tin (Sn)
Terminal form GULL WING GULL WING - NO LEAD NO LEAD - NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm - 0.5 mm 0.5 mm - 0.5 mm 0.5 mm
Terminal location DUAL DUAL - QUAD QUAD - QUAD QUAD
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED - NOT SPECIFIED NOT SPECIFIED - NOT SPECIFIED NOT SPECIFIED
width 4.4 mm 4.4 mm - 5 mm 5 mm - 5 mm 5 mm
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