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LTC3810IG#PBF

Description
Outputable current: - Switching operating frequency: - Output type: Transistor Driver Number of output voltage channels: 1 Function type: Step-Down Output configuration: Positive
CategoryPower/power management    The power supply circuit   
File Size508KB,38 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC3810IG#PBF Overview

Outputable current: - Switching operating frequency: - Output type: Transistor Driver Number of output voltage channels: 1 Function type: Step-Down Output configuration: Positive

LTC3810IG#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeSSOP
package instructionSSOP, SSOP28,.3
Contacts28
Manufacturer packaging codeG
Reach Compliance Codecompliant
ECCN codeEAR99
Samacsys DescriptionSwitching Voltage Regulators 100V C Mode Sync Sw Reg Cntr
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage14 V
Minimum input voltage6.35 V
Nominal input voltage10 V
JESD-30 codeR-PDSO-G28
JESD-609 codee3
length10.2 mm
Humidity sensitivity level1
Number of functions1
Number of terminals28
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Encapsulate equivalent codeSSOP28,.3
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)250
Certification statusNot Qualified
Maximum seat height2 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 temperatureNOT SPECIFIED
width5.5 mm
FEATURES
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
LTC3810
100V Current Mode
Synchronous Switching
Regulator Controller
DESCRIPTION
The LTC3810 is a synchronous step-down switching
regulator controller that can directly step-down voltages
from up to 100V, making it ideal for telecom and automo-
tive applications. The LTC3810 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 drivers
allow the LTC3810 to drive multiple MOSFETs for higher
current applications. The operating frequency is selected
by an external resistor and is compensated for variations
in V
IN
and can also be synchronized to an external clock
for switching-noise sensitive applications. A shutdown pin
allows the LTC3810 to be turned off, reducing the supply
current to 240μA.
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.
High Voltage Operation: Up to 100V
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 Output Voltage Tracking/Soft-Start
Generates 10V Driver Supply from Input Supply
Synchronizable to External Clock
Selectable Pulse Skip Mode Operation
Power Good Output Voltage Monitor
Adjustable On-Time/Frequency: t
ON(MIN)
< 100ns
Adjustable Cycle-by-Cycle Current Limit
Programmable Undervoltage Lockout
Output Overvoltage Protection
28-Pin SSOP Package
APPLICATIONS
n
n
n
48V Telecom and Base Station Power Supplies
Networking Equipment, Servers
Automotive and Industrial Control Systems
L,
LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks
and No R
SENSE
is a trademark 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.
TYPICAL APPLICATION
High Efficiency High Voltage Step-Down Converter
R
ON
261k
I
ON
PGOOD
V
RNG
C
SS
1000pF
LTC3810
TG
0.1μF
SW
EXTV
CC
DRV
CC
INTV
CC
SENSE
+
BG
SGND
SENSE
BGRTN
M2
Si7456DP
R
FB2
1k
D1
MBR1100
R
FB1
14k
M1
Si7456DP
L1
10μH
V
OUT
12V/6A
NDRV
BOOST
100k
M3
ZXMN10A07F
Efficiency vs Load Current
100
V
IN
= 50V
V
IN
= 25V
95
EFFICIENCY (%)
V
IN
= 75V
90
+
V
IN
15V TO 100V
C
IN
22μF
MODE/SYNC
SS/TRACK
SHDN
85
47pF
I
TH
200k
V
FB
+
C
OUT
270μF
80
0
1
2
3
LOAD (A)
4
5
6
3810 TA01b
5pF
1μF
3810 TA01
3810fc
1

LTC3810IG#PBF Related Products

LTC3810IG#PBF LTC3810EG#PBF LTC3810EG#TRPBF LTC3810IG#TRPBF
Description Outputable current: - Switching operating frequency: - Output type: Transistor Driver Number of output voltage channels: 1 Function type: Step-Down Output configuration: Positive IC reg ctrlr buck pwm CM 28-ssop IC REG CTRLR BUCK 28SSOP IC REG CTRLR BUCK 28SSOP
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, SSOP28,.3 SSOP, SSOP28,.3 SSOP, SSOP28,.3 SSOP, SSOP28,.3
Contacts 28 28 28 28
Manufacturer packaging code G G G G
Reach Compliance Code compliant compli 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 6.35 V 6.35 V 6.35 V 6.35 V
Nominal input voltage 10 V 10 V 10 V 10 V
JESD-30 code R-PDSO-G28 R-PDSO-G28 R-PDSO-G28 R-PDSO-G28
JESD-609 code e3 e3 e3 e3
length 10.2 mm 10.2 mm 10.2 mm 10.2 mm
Humidity sensitivity level 1 1 1 1
Number of functions 1 1 1 1
Number of terminals 28 28 28 28
Maximum operating temperature 125 °C 85 °C 85 °C 125 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SSOP SSOP SSOP SSOP
Encapsulate equivalent code SSOP28,.3 SSOP28,.3 SSOP28,.3 SSOP28,.3
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) 250 260 260 250
Certification status Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 2 mm 2 mm 2 mm 2 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 NOT SPECIFIED 30 30 NOT SPECIFIED
width 5.5 mm 5.5 mm 5.5 mm 5.5 mm
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