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LTC3812IFE-5#PBF

Description
IC REG CTRLR BUCK 16TSSOP
CategoryPower/power management    The power supply circuit   
File Size425KB,34 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC3812IFE-5#PBF Overview

IC REG CTRLR BUCK 16TSSOP

LTC3812IFE-5#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
parentfamilyid1383630
MakerLinear ( ADI )
Objectid1847369922
Parts packaging codeTSSOP
package instructionHTSSOP, TSSOP16,.25
Contacts16
Manufacturer packaging codeFE
Reach Compliance Codecompliant
ECCN codeEAR99
compound_id1433870
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage14 V
Minimum input voltage4.35 V
Nominal input voltage5 V
JESD-30 codeR-PDSO-G16
JESD-609 codee3
length5 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Maximum output current1 A
Package body materialPLASTIC/EPOXY
encapsulated codeHTSSOP
Encapsulate equivalent codeTSSOP16,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1.1 mm
surface mountYES
Switch configurationPUSH-PULL
technologyCMOS
Temperature levelAUTOMOTIVE
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width4.5 mm
FEATURES
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
LTC3812-5
60V Current Mode
Synchronous Switching
Regulator Controller
DESCRIPTION
The LTC3812-5 is a synchronous step-down switching
regulator controller that can directly step down voltages
from up to 60V input, making it ideal for telecom and
automotive applications. The LTC3812-5 uses a constant
on-time valley current control architecture to deliver very
low duty cycles with accurate cycle-by-cycle current limit
without requiring a sense resistor.
A precise internal reference provides 0.5% DC accuracy.
A high bandwidth (25MHz) error amplifier provides very
fast line and load transient response. Large 1Ω gate driv-
ers allow the LTC3812-5 to drive large power MOSFETs
for higher current applications. The operating frequency
is selected by an external resistor and is compensated for
variations in V
IN
. A shutdown pin allows the LTC3812-5 to
be turned off reducing the supply current to <230μA.
Integrated bias control generates gate drive power from
the input supply during start-up and when an output short-
circuit occurs, with the addition of a small external SOT23
MOSFET. When in regulation, power is derived from the
output for higher efficiency.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 5481178, 5847554, 6304066, 6476589, 6580258,
6677210, 6774611.
High Voltage Operation: Up to 60V
Large 1Ω Gate Drivers
No Current Sense Resistor Required
Dual N-Channel MOSFET Synchronous Drive
Extremely Fast Transient Response
±0.5% 0.8V Voltage Reference
Programmable Soft-Start
Generates 5.5V Driver Supply
Selectable Pulse-Skipping Mode Operation
Power Good Output Voltage Monitor
Adjustable On-Time/Frequency: t
ON(MIN)
< 100ns
Adjustable Cycle-by-Cycle Current Limit
Undervoltage Lockout On Driver Supply
Output Overvoltage Protection
Thermally Enhanced 16-Pin TSSOP Package
APPLICATIONS
n
n
n
48V Telecom and Base Station Power Supplies
Networking Equipment, Servers
Automotive and Industrial Control Systems
TYPICAL APPLICATION
High Efficiency High Voltage Step-Down Converter
R
ON
110k
I
ON
100k
PGOOD
PGOOD
V
RNG
FCB
RUN/SS
1000pF
47pF
200k
V
FB
5pF
1.89k
SGND
PGND
I
TH
BOOST
TG
SW
EXTV
CC
INTV
CC
BG
1μF
M2
Si7850DP
D1
MBR1100
10k
M1
Si7850DP
L1
4.7μH
LTC3812-5
0.1μF
NDRV
100k
M3
ZXMN-
10A07F
Efficiency vs Load Current
100
V
IN
= 12V
95
EFFICIENCY (%)
V
IN
= 42V
V
IN
= 24V
+
V
IN
6V TO 60V
C
IN
22μF
90
V
OUT
5V
5A
85
80
+
0
C
OUT
270μF
1
2
3
4
LOAD CURRENT (A)
5
6
38125 TA01b
38125 TA01
38125fc
1

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Description IC REG CTRLR BUCK 16TSSOP IC REG CTRLR BUCK 16TSSOP IC REG CTRLR BUCK 16TSSOP IC REG CTRLR BUCK 16TSSOP
Brand Name Linear Technology Linear Technology Linear Technology Linear Technology
Is it Rohs certified? conform to conform to conform to conform to
Parts packaging code TSSOP TSSOP TSSOP TSSOP
package instruction HTSSOP, TSSOP16,.25 HTSSOP, TSSOP16,.25 HTSSOP, TSSOP16,.25 HTSSOP, TSSOP16,.25
Contacts 16 16 16 16
Manufacturer packaging code FE FE FE FE
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 14 V 14 V 14 V 14 V
Minimum input voltage 4.35 V 4.35 V 4.35 V 4.35 V
Nominal input voltage 5 V 5 V 5 V 5 V
JESD-30 code R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16
JESD-609 code e3 e3 e3 e3
length 5 mm 5 mm 5 mm 5 mm
Humidity sensitivity level 1 1 1 1
Number of functions 1 1 1 1
Number of terminals 16 16 16 16
Maximum operating temperature 125 °C 85 °C 85 °C 125 °C
Maximum output current 1 A 1 A 1 A 1 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HTSSOP HTSSOP HTSSOP HTSSOP
Encapsulate equivalent code TSSOP16,.25 TSSOP16,.25 TSSOP16,.25 TSSOP16,.25
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 260 260 260 260
Certification status Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 1.1 mm 1.1 mm 1.1 mm 1.1 mm
surface mount YES YES YES YES
Switch configuration PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL
technology CMOS CMOS CMOS CMOS
Temperature level AUTOMOTIVE OTHER OTHER AUTOMOTIVE
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 0.65 mm 0.65 mm 0.65 mm 0.65 mm
Terminal location DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 30 30 30 30
width 4.5 mm 4.5 mm 4.5 mm 4.5 mm
Maker Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) -
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