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LTC3711EGN#PBF

Description
IC REG CTRLR BUCK 24SSOP
CategoryPower/power management    The power supply circuit   
File Size294KB,24 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC3711EGN#PBF Overview

IC REG CTRLR BUCK 24SSOP

LTC3711EGN#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeSSOP
package instructionSSOP,
Contacts24
Manufacturer packaging codeGN
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage36 V
Minimum input voltage4 V
Nominal input voltage15 V
JESD-30 codeR-PDSO-G24
JESD-609 codee3
length8.65 mm
Humidity sensitivity level1
Number of functions1
Number of terminals24
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current2 A
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
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 frequency590 kHz
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3.9116 mm
LTC3711
5-Bit Adjustable,
Wide Operating Range,
No R
SENSE
TM
Step-Down Controller
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
5-Bit Programmable Output Voltage: 0.925V to 2V
No Sense Resistor Required
True Current Mode Control
2% to 90% Duty Cycle at 200kHz
t
ON(MIN)
< 100ns
Supports Active Voltage Positioning
Extremely Fast Transient Response
Stable with Ceramic C
OUT
Dual N-Channel MOSFET Synchronous Drive
Power Good Output Voltage Monitor
Wide V
IN
Range: 4V to 36V
±1%
0.8V Reference
Adjustable Current Limit
Adjustable Switching Frequency
Programmable Soft-Start
Output Overvoltage Protection
Optional Short-Circuit Shutdown Timer
Micropower Shutdown: I
Q
< 30µA
Available in 24-Lead Narrow SSOP Package
The LTC
®
3711 is a synchronous step-down switching
regulator controller for CPU power. An output voltage
between 0.925V and 2.000V is selected by a 5-bit code
(Intel mobile VID specification). The controller uses a
valley current control architecture to deliver very low duty
cycles without requiring a sense resistor. Operating fre-
quency is selected by an external resistor and is compen-
sated for variations in V
IN
and V
OUT
.
Discontinuous mode operation provides high efficiency
operation at light loads. A forced continuous control pin
reduces noise and RF interference and can assist second-
ary winding regulation by disabling discontinuous mode
operation when the main output is lightly loaded.
Fault protection is provided by internal foldback current
limiting, an output overvoltage comparator and optional
short-circuit shutdown timer. Soft-start capability for sup-
ply sequencing is accomplished using an external timing
capacitor. The regulator current limit level is user pro-
grammable. Wide supply range allows operation from 4V
to 36V at the input.
, LTC and LT are registered trademarks of Linear Technology Corporation.
No R
SENSE
is a trademark of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
APPLICATIO S
s
s
Power Supplies for Mobile Pentium
®
Processors
Notebook and Palmtop Computers, PDAs
TYPICAL APPLICATIO
R
ON
330k
PGOOD
C
SS
0.1µF
RUN/SS
C
C
500pF
R
C
20k
I
TH
SGND
I
ON
V
IN
TG
SW
BOOST
INTV
CC
VID4
VID3
5-BIT VID
VID2
VID1
VID0
V
OSENSE
PGND
BG
C
B
0.33µF
M1
IRF7811A
L1
1µH
EFFICIENCY (%)
C
IN
22µF
50V
×3
V
IN
5V TO 24V
LTC3711
D
B
CMDSH-3
M2
IRF7811A
×2
D1
UPS840
+
C
OUT
270µF
2V
×4
V
OUT
1.5V
15A
+
C
VCC
4.7µF
C
IN
: UNITED CHEMICON
THCR70EIH226ZT
C
OUT
: CORNELL DUBILIER
ESRE271M02B
L1: SUMIDA CEP125-IROMC
3711 F01a
Figure 1. High Efficiency Step-Down Converter
U
Efficiency vs Load Current
100
V
OUT
= 1.5V
EXTV
CC
= 5V
90
V
IN
= 15V
80
V
IN
= 5V
70
60
0.01
1
0.1
LOAD CURRENT (A)
10
3711 F01b
U
U
3711f
1

LTC3711EGN#PBF Related Products

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Description IC REG CTRLR BUCK 24SSOP IC reg ctrlr buck pwm CM 24-ssop IC REG CTRLR BUCK 24SSOP
Brand Name Linear Technology Linear Technology Linear Technology
Is it Rohs certified? conform to incompatible conform to
Maker Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
Parts packaging code SSOP SSOP SSOP
package instruction SSOP, SSOP, SSOP,
Contacts 24 24 24
Manufacturer packaging code GN GN GN
Reach Compliance Code compliant _compli compliant
ECCN code EAR99 EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 36 V 36 V 36 V
Minimum input voltage 4 V 4 V 4 V
Nominal input voltage 15 V 15 V 15 V
JESD-30 code R-PDSO-G24 R-PDSO-G24 R-PDSO-G24
JESD-609 code e3 e0 e3
length 8.65 mm 8.65 mm 8.65 mm
Humidity sensitivity level 1 1 1
Number of functions 1 1 1
Number of terminals 24 24 24
Maximum operating temperature 70 °C 70 °C 70 °C
Maximum output current 2 A 2 A 2 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SSOP SSOP SSOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 260 235 260
Certification status Not Qualified Not Qualified Not Qualified
Maximum seat height 1.75 mm 1.75 mm 1.75 mm
surface mount YES YES YES
Switch configuration PUSH-PULL PUSH-PULL PUSH-PULL
Maximum switching frequency 590 kHz 590 kHz 590 kHz
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL
Terminal surface Matte Tin (Sn) Tin/Lead (Sn/Pb) Matte Tin (Sn)
Terminal form GULL WING GULL WING GULL WING
Terminal pitch 0.635 mm 0.635 mm 0.635 mm
Terminal location DUAL DUAL DUAL
Maximum time at peak reflow temperature 30 20 30
width 3.9116 mm 3.9116 mm 3.9116 mm
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