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LTC1704EGN#PBF

Description
IC REG DL BUCK/LINEAR 16SSOP
CategoryPower/power management    The power supply circuit   
File Size340KB,28 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC1704EGN#PBF Overview

IC REG DL BUCK/LINEAR 16SSOP

LTC1704EGN#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeSSOP
package instructionSSOP, SSOP16,.25
Contacts16
Manufacturer packaging codeGN
Reach Compliance Codecompliant
ECCN codeEAR99
Is SamacsysN
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage5.5 V
Minimum input voltage3.15 V
Nominal input voltage5 V
JESD-30 codeR-PDSO-G16
JESD-609 codee3
length4.8895 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current5 A
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Encapsulate equivalent codeSSOP16,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1.727 mm
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency650 kHz
technologyBICMOS
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3.899 mm
Base Number Matches1
LTC1704/LTC1704B
550kHz Synchronous
Switching Regulator Controller
Plus Linear Regulator Controller
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
Dual Regulated Outputs: One Switching Regulator
and One Linear Regulator
Excellent DC Accuracy:
±1.5%
for Switcher
and
±2%
for Linear Regulator
External N-Channel MOSFET Architecture
No External Current Sense Resistor Required
Burst Mode
®
Operation at Light Load (LTC1704)
Continuous Switching at Light Load (LTC1704B)
Linear Regulator with Programmable Current Limit
Linear Regulator with Programmable Start-Up Delay
Low Shutdown Current: <150µA
High Efficiency Over Wide Load Current Range
PGOOD Flag Monitors Both Outputs
Small 16-Pin Narrow SSOP Package
APPLICATIO S
s
s
s
The LTC
®
1704/LTC1704B include a high power synchro-
nous switching regulator controller plus a linear regulator
controller. The switching regulator controller is designed
to drive a pair of N-channel MOSFETs in a voltage mode,
synchronous buck configuration to provide the main sup-
ply. The constant frequency, true PWM architecture
switches at 550kHz, minimizing external component size,
cost and optimizing load transient performance. The
LTC1704 features automatic transition to power saving
Burst Mode operation at light loads. The LTC1704B does
not shift into Burst Mode operation at light loads, eliminat-
ing low frequency output ripple at the expense of light load
efficiency. The linear regulator controller is designed to
drive an external NPN power transistor to provide up to 2A
of current to an auxiliary load.
The LTC1704/LTC1704B deliver better than
±1.5%
DC
accuracy at the switcher outputs and
±2%
at the linear
regulator outputs. High performance feedback loops allow
the circuit to keep total output regulation within
±5%
under all transient conditions. An open-drain PGOOD
output indicates when both outputs are within
±10%
of
their regulated values.
Multiple Logic Supply Generator
Distributed Power Applications
High Efficiency Power Conversion
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
V
IN
5V
C
IN
330µF
10V
×3
5V to 1.8V/15A and 1.5V/2A Application
10Ω
+
1µF
MBR0520LT1
+
10µF
11
V
CC
PGOOD
REGILM
RUN/SS
LTC1704
+
5k
470k
10µF
100
L1
0.68µH
V
OUTSW
1.8V
15A
C
OUTSW
180µF
4V
×6
QTA
QTB
+
QBB
QBA
14
13.7k 3
BG
4
0.1µF
1000pF
EFFICIENCY (%)
16 15
C
CP
1µF BOOST PV
CC
1
TG
2
SW
12
10
I
MAX
PGND
FB
COMP
GND
REGDR
8
V
OUTSW
7
ON SEMI
D44H11
698Ω
806Ω
1704 TA01
10k
1800pF
1.8k
13
6
8.06k
1800pF
11k
330pF
5
REGFB
9
+
100µF
TANT
V
OUTREG
1.5V
2A
C
IN
: KEMET T510X337K010AS
C
OUTSW
: PANASONIC EEFUE0G181R
L: SUMIDA CEP125-4712-T007
QTA, QTB, QBA, QBB: FAIRCHILD FDS6670A
U
Switcher Efficiency
90
80
70
V
IN
= 5V
V
OUTSW
= 1.8V
T
A
= 25°C
QT = QB = 2xFDS6670A
0
3
9
6
I
LOAD
(A)
12
15
1704 G04
U
U
60
50
1704bfa
1

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LTC1704EGN#PBF LTC1704EGN#TR LTC1704BEGN#TR LTC1704BEGN#PBF LTC1704EGN#TRPBF LTC1704BEGN#TRPBF
Description IC REG DL BUCK/LINEAR 16SSOP IC reg DL buck/linear 16ssop IC reg DL buck/linear 16-ssop IC REG DL BUCK/LINEAR 16-SSOP IC REG DL BUCK/LINEAR 16SSOP IC REG DL BUCK/LINEAR 16-SSOP
Brand Name Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology
Is it Rohs certified? conform to incompatible incompatible conform to conform to conform to
Maker Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
Parts packaging code SSOP SSOP SSOP SSOP SSOP SSOP
package instruction SSOP, SSOP16,.25 SSOP, SSOP, SSOP, SSOP16,.25 SSOP, SSOP,
Contacts 16 16 16 16 16 16
Manufacturer packaging code GN GN GN GN GN GN
Reach Compliance Code compliant compli _compli compliant compliant compliant
ECCN code EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Is Samacsys N N N N N N
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V
Minimum input voltage 3.15 V 3.15 V 3.15 V 3.15 V 3.15 V 3.15 V
Nominal input voltage 5 V 5 V 5 V 5 V 5 V 5 V
JESD-30 code R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16
JESD-609 code e3 e0 e0 e3 e3 e3
length 4.8895 mm 4.8895 mm 4.8895 mm 4.8895 mm 4.8895 mm 4.8895 mm
Humidity sensitivity level 1 1 1 1 1 1
Number of functions 1 1 1 1 1 1
Number of terminals 16 16 16 16 16 16
Maximum operating temperature 70 °C 70 °C 70 °C 70 °C 70 °C 70 °C
Maximum output current 5 A 5 A 5 A 5 A 5 A 5 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SSOP SSOP SSOP SSOP SSOP SSOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 260 235 235 260 260 260
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 1.727 mm 1.727 mm 1.727 mm 1.727 mm 1.727 mm 1.727 mm
surface mount YES YES YES YES YES YES
Switch configuration PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL
Maximum switching frequency 650 kHz 650 kHz 650 kHz 650 kHz 650 kHz 650 kHz
technology BICMOS BICMOS BICMOS BICMOS BICMOS BICMOS
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
Terminal surface Matte Tin (Sn) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING
Terminal pitch 0.635 mm 0.635 mm 0.635 mm 0.635 mm 0.635 mm 0.635 mm
Terminal location DUAL DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 30 20 20 30 30 30
width 3.899 mm 3.899 mm 3.899 mm 3.899 mm 3.899 mm 3.899 mm
Base Number Matches 1 1 1 1 1 1
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