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LTC1702CGN#PBF

Description
IC REG CTRLR BUCK 24SSOP
CategoryPower/power management    The power supply circuit   
File Size392KB,36 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric Compare View All

LTC1702CGN#PBF Overview

IC REG CTRLR BUCK 24SSOP

LTC1702CGN#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
Is SamacsysN
Analog Integrated Circuits - Other TypesDUAL SWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage7 V
Minimum input voltage3 V
Nominal input voltage5 V
JESD-30 codeR-PDSO-G24
JESD-609 codee3
length8.649 mm
Humidity sensitivity level1
Number of functions1
Number of terminals24
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current5 A
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 configurationPUSH-PULL
Maximum switching frequency750 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
LTC1702
Dual 550kHz Synchronous
2-Phase Switching Regulator Controller
FEATURES
DESCRIPTIO
Two Independent Controllers in One Package
Two Sides Run Out-of-Phase to Minimize C
IN
All N-Channel External MOSFET Architecture
No External Current Sense Resistors
Excellent Output Regulation: 1% Total Output
Accuracy
550kHz Switching Frequency Minimizes External
Component Size
1A to 25A Output Current per Channel
High Efficiency over Wide Load Current Range
Quiescent Current Drops Below 100µA in Shutdown
Small 24-Pin Narrow SSOP Package
APPLICATIO S
Microprocessor Core and I/O Supplies
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. All other trademarks are the
property of their respective owners. Protected by U.S. Patents including 5481178,
5847554, 6304066, 6307356, 6580258.
The LTC
®
1702 is a dual switching regulator controller opti-
mized for high efficiency with low input voltages. It includes
two complete, on-chip, independent switching regulator
controllers each designed to drive a pair of external N-channel
MOSFET devices in a voltage mode feedback, synchronous
buck configuration. The LTC1702 uses a constant-frequency,
true PWM design switching at 550kHz, minimizing external
component size and cost and maximizing load transient
performance. The synchronous buck architecture automati-
cally shifts to discontinuous and then to Burst Mode
TM
operation as the output load decreases, ensuring maximum
efficiency over a wide range of load currents.
The LTC1702 features an onboard reference trimmed to
0.5% and can provide better than 1% regulation at the
converter outputs. Open-drain logic outputs indicate whether
either output has risen to within 5% of the final output voltage
and an optional latching FAULT mode protects the load if the
output rises 15% above the intended voltage. Each channel
can be enabled independently; with both channels disabled,
the LTC1702 shuts down and supply current drops below
100µA.
TYPICAL APPLICATIO
C
OUT1
, C
OUT2
: PANASONIC EEFUE0G181R
C
IN
: KEMET TS10X337M010AS
D1, D2: MOTOROLA MBR0520LT1
D3, D4: MOTOROLA MBRS320T3
L1, L2: SUMIDA CEP125-1R0
Q1 TO Q8: FAIRCHILD FDS6670A
1µF
Dual Output High Power 3.3V/2.5V Logic Supply
V
IN
= 5V
±10%
D1
27k
10µF
Q5
21
20
19
18
17
16
15
14
13
27pF
1µF
68k
3300pF
10k
1702 TA01
D2
1µF
1
1µF
2
3
Q1
Q2
4
5
PV
CC
BOOST1
BG1
TG1
SW1
I
MAX1
PGOOD1
FCB
RUN/SS
COMP1
SGND
FB1
LTC1702
I
MAX2
BOOST2
BG2
TG2
SW2
PGND
PGOOD2
FAULT
RUN/SS2
COMP2
FB2
V
CC
10Ω
24
23
22
10µF
+
V
OUT1
2.5V
AT 15A
1µF
L1
1µH
27k
+
C
OUT1
180µF
×4
D3
1.2k
10k
1%
Q3
Q4
6
7
8
820pF
9
1µF
10
4.75k
1%
V
IN
10k
PWRGD1
47k
680pF
27pF
11
12
U
C
IN
330µF
×3
1µF
Q6
L2
1µH
V
OUT2
3.3V/15A
Q7
Q8
D4
1.6k
15.8k
1%
U
U
+
680pF
C
OUT2
180µF
×4
1µF
4.99k
1%
V
IN
PWRGD2
FAULT
1702fa
1

LTC1702CGN#PBF Related Products

LTC1702CGN#PBF LTC1702CGN#TR LTC1702IGN#TR LTC1702IGN#PBF LTC1702CGN#TRPBF LTC1702IGN#TRPBF
Description IC REG CTRLR BUCK 24SSOP IC reg ctrlr buck pwm VM 24-ssop IC reg ctrlr buck pwm VM 24-ssop IC REG CTRLR BUCK 24SSOP IC REG CTRLR BUCK 24SSOP IC REG CTRLR BUCK 24SSOP
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, SSOP24,.24 SSOP, SSOP24,.24 SSOP, SSOP24,.24 SSOP, SSOP24,.24 SSOP, SSOP24,.24 SSOP, SSOP24,.24
Contacts 24 24 24 24 24 24
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 DUAL SWITCHING CONTROLLER DUAL SWITCHING CONTROLLER DUAL SWITCHING CONTROLLER DUAL SWITCHING CONTROLLER DUAL SWITCHING CONTROLLER DUAL 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 7 V 7 V 7 V 7 V 7 V 7 V
Minimum input voltage 3 V 3 V 3 V 3 V 3 V 3 V
Nominal input voltage 5 V 5 V 5 V 5 V 5 V 5 V
JESD-30 code R-PDSO-G24 R-PDSO-G24 R-PDSO-G24 R-PDSO-G24 R-PDSO-G24 R-PDSO-G24
JESD-609 code e3 e0 e0 e3 e3 e3
length 8.649 mm 8.649 mm 8.649 mm 8.649 mm 8.649 mm 8.649 mm
Humidity sensitivity level 1 1 1 1 1 1
Number of functions 1 1 1 1 1 1
Number of terminals 24 24 24 24 24 24
Maximum operating temperature 70 °C 70 °C 85 °C 85 °C 70 °C 85 °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
Encapsulate equivalent code SSOP24,.24 SSOP24,.24 SSOP24,.24 SSOP24,.24 SSOP24,.24 SSOP24,.24
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 1.75 mm 1.75 mm 1.75 mm 1.75 mm 1.75 mm 1.75 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 750 kHz 750 kHz 750 kHz 750 kHz 750 kHz 750 kHz
technology BICMOS BICMOS BICMOS BICMOS BICMOS BICMOS
Temperature level COMMERCIAL COMMERCIAL INDUSTRIAL INDUSTRIAL COMMERCIAL INDUSTRIAL
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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