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LTC3706IGN#PBF

Description
IC SECONDARY SIDE CTRLR 24SSOP
CategoryPower/power management    The power supply circuit   
File Size279KB,22 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric Compare View All

LTC3706IGN#PBF Overview

IC SECONDARY SIDE CTRLR 24SSOP

LTC3706IGN#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeSSOP
package instructionSSOP, SSOP24,.24
Contacts24
Manufacturer packaging codeGN
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage30 V
Minimum input voltage5 V
Nominal input voltage15 V
JESD-30 codeR-PDSO-G24
JESD-609 codee3
length8.649 mm
Humidity sensitivity level1
Number of functions1
Number of terminals24
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Nominal output voltage7 V
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Encapsulate equivalent codeSSOP24,.24
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1.75 mm
surface mountYES
Switch configurationSINGLE
Maximum switching frequency353 kHz
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3.899 mm
FEATURES
n
n
LTC3706
Secondary-Side Synchronous
Forward Controller with
PolyPhase Capability
DESCRIPTION
The LTC
®
3706 is a PolyPhase capable secondary-side
controller for synchronous forward converters. When used
in conjunction with the LTC3705 gate driver and primary-
side controller, the part creates a complete isolated power
supply that combines the power of PolyPhase operation
with the speed of secondary-side control.
The LTC3706 has been designed to simplify the design
of highly efficient, secondary-side forward converters.
Working in concert with the LTC3705, the LTC3706 forms
a robust, self-starting converter that eliminates the need
for the separate bias regulator that is commonly used in
secondary-side control applications. In addition, a pro-
prietary scheme is used to multiplex gate drive signals
and DC bias power across the isolation barrier through a
single, tiny pulse transformer.
The LTC3706 provides remote sensing, accurate power
good and overvoltage monitoring circuits to support preci-
sion, high current applications. A linear regulator controller
with thermal protection is also provided to simplify the
generation of secondary-side bias voltage.
The LTC3706 is available in a 24-lead SSOP package.
n
n
n
n
n
n
n
n
n
n
Secondary-Side Control for Fast Transient Response
Self-Starting Architecture Eliminates Need for
Separate Bias Regulator
Proprietary Gate Drive Encoding Scheme Reduces
System Complexity
PolyPhase
®
Operation Reduces C
IN
Requirements
Current Mode Control Ensures Current Sharing
PLL Fixed Frequency: 100kHz to 500kHz
±1%
Output Voltage Accuracy
True Remote Sense Differential Amplifier
Power Good Output Voltage Monitor
High Voltage Linear Regulator Controller
Wide Supply Range: 5V to 30V
Available in a Narrow 24-Lead SSOP Package
APPLICATIONS
n
n
n
n
Isolated 48V Telecommunication Systems
Internet Servers and Routers
Distributed Power Step-Down Converters
Automotive and Heavy Equipment
L,
LT, LTC, LTM, PolyPhase, Burst Mode, Linear Technology and the Linear logo are registered
trademarks and No R
SENSE
and ThinSOT are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 6144194, other patents pending.
TYPICAL APPLICATION
36V-72V to 3.3V/20A Isolated Forward Converter
V
IN+
Si7852DP
1µF
100V
×3
T1
MURS120
Si7852DP
Si7336ADP
×2
1.2
L1
1.2µH
V
OUT+
Si7336ADP
MURS120
2m
2W
CMPSH1-4
10µF
25V
330µF
6.3V
×3
V
IN–
FQT7N10
100k
BAS21 0.22µF
30m
1W
CZT3019
L1: COILCRAFT SER2010-122
T1: PULSE PA0807
T2: PULSE PA0297
TS BG IS
FB/IN
+
T2
1µF
2.2µF
16V
I
S–
PT
+
PT
162k
33nF
RUN/SS GND PGND PHASE SLP MODE REGSD
20k
I
S+
FG
SW SG
V
IN
NDRV
V
CC
FS/SYNC
LTC3706
FB
ITH
680pF
22.6k
1%
3706 TA01
V
OUT–
102k
1%
365k
1%
NDRV
UVLO
2.2µF
25V
33nF
V
CC
SS/FLT
BOOST TG
LTC3705
FS/IN
15k
1%
GND PGND VSLMT
3706fd
1

LTC3706IGN#PBF Related Products

LTC3706IGN#PBF LTC3706IGN#TRPBF LTC3706EGN#PBF LTC3706EGN#TRPBF
Description IC SECONDARY SIDE CTRLR 24SSOP IC SECONDARY SIDE CTRLR 24SSOP IC SECONDARY SIDE CTRLR 24SSOP IC SECONDARY SIDE CTRLR 24SSOP
Brand Name Linear Technology Linear Technology Linear Technology Linear Technology
Is it Rohs certified? conform to conform to conform to conform to
Maker Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
Parts packaging code SSOP SSOP SSOP SSOP
package instruction SSOP, SSOP24,.24 SSOP, SSOP24,.24 SSOP, SSOP24,.24 SSOP, SSOP24,.24
Contacts 24 24 24 24
Manufacturer packaging code GN GN GN GN
Reach Compliance Code compliant compliant compliant compliant
ECCN code EAR99 EAR99 EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 30 V 30 V 30 V 30 V
Minimum input voltage 5 V 5 V 5 V 5 V
Nominal input voltage 15 V 15 V 15 V 15 V
JESD-30 code R-PDSO-G24 R-PDSO-G24 R-PDSO-G24 R-PDSO-G24
JESD-609 code e3 e3 e3 e3
length 8.649 mm 8.649 mm 8.649 mm 8.649 mm
Humidity sensitivity level 1 1 1 1
Number of functions 1 1 1 1
Number of terminals 24 24 24 24
Maximum operating temperature 85 °C 85 °C 85 °C 85 °C
Nominal output voltage 7 V 7 V 7 V 7 V
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SSOP SSOP SSOP SSOP
Encapsulate equivalent code SSOP24,.24 SSOP24,.24 SSOP24,.24 SSOP24,.24
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 260 260 260 260
Certification status Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 1.75 mm 1.75 mm 1.75 mm 1.75 mm
surface mount YES YES YES YES
Switch configuration SINGLE SINGLE SINGLE SINGLE
Maximum switching frequency 353 kHz 353 kHz 353 kHz 353 kHz
technology CMOS CMOS CMOS CMOS
Temperature level INDUSTRIAL INDUSTRIAL OTHER OTHER
Terminal surface Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form GULL WING GULL WING GULL WING GULL WING
Terminal pitch 0.635 mm 0.635 mm 0.635 mm 0.635 mm
Terminal location DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 30 30 30 30
width 3.899 mm 3.899 mm 3.899 mm 3.899 mm
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