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Linear Technology Electronic Components Datasheet

LTC3613 Datasheet

15A Monolithic Step Down Regulator

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LTC3613
FEATURES
24V, 15A Monolithic
Step Down Regulator with
Differential Output Sensing
DESCRIPTION
n Wide VIN Range: 4.5V to 24V;
VOUT Range: 0.6V to 5.5V at up to 15A
n 0.67% Output Voltage Accuracy
n Controlled On-Time Valley Current Mode Architecture,
Excellent Current Sharing Capability
n Frequency Programmable from 200kHz to 1MHz
and Synchronizable to External Clock
n RSENSE or Inductor DCR Current Sensing With
Accurate Current Limit
n Fast Transient Response
n Differential Output Voltage Sensing Allowing 500mV
Common Mode Remote Ground
n tON(MIN) = 65ns; tOFF(MIN) = 105ns
n Overvoltage Protection and Current Limit Foldback
n Power Good Output Voltage Monitor
n Voltage Tracking Start-Up
n External VCC Input for Bypassing Internal LDO
n Micropower Shutdown: IQ = 15μA
n 7mm × 9mm 56-pin QFN Package
APPLICATIONS
n Distributed Power System
n Point-of-Load Converters
n Servers
The LTC®3613 is a monolithic synchronous step-down
switching regulator capable of regulating outputs from 0.6V
to 5.5V with up to 15A output current. The controlled on-time
constantfrequencyvalleycurrentmodearchitectureallowsfor
both fast transient response and constant frequency switch-
ing in steady-state operation, independent of VIN, VOUT and
load. This also provides excellent current sharing capability.
Differential output voltage sensing along with a precision
internal reference combine to offer ±0.67% output regula-
tion, even if the output ground reference deviates from
local ground by 500mV. The switching frequency can be
programmed from 200kHz to 1MHz with an external resis-
tor. The switching frequency is also phase synchronizable
to an external clock in applications where switching noise/
EMI reduction is crucial.
Very low tON and tOFF times allow for near 0% and near 100%
duty cycles, respectively. Voltage tracking soft start-up is
provided for tracking and sequencing applications. Safety fea-
tures include output overvoltage protection, programmable
current limit with foldback, and power good monitoring.
L, LT, LTC, LTM, OPTI-LOOP, Linear Technology and the Linear logo are registered trademarks
and Hot Swap and No RSENSE is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents including
5481178, 5487554, 6580258, 6304066, 6476589, 6774611.
TYPICAL APPLICATION
High Efficiency High Power Step-Down Converter
INTVCC
PVIN
SVIN
100k
0.1μF
47pF
LTC3613
PGOOD
VOUT
RUN
VRNG
SENSE
SENSE+
MODE/PLLIN
EXTVCC
SW
TRACK/SS BOOST
270pF
21k
115k
ITH
RT
SGND
INTVCC
PGND
VOSNS+
VOSNS–
3613 TA01
VIN
+ 4.5V TO 24V
0.1μF
82μF
10Ω
1000pF 10Ω
0.47μH
0.1μF
1.5mΩ
15k
4.7μF
10k
+
VOUT
1.5V
15A
330μF
×2
Efficiency and Power Loss
vs Load Current
100
90 PULSE-SKIPPING MODE
80
70
3.5
3.0
2.5
60
FORCED
2.0
50 CONTINUOUS
40 MODE 1.5
30
20
10
0
0.01
1.0
VIN = 12V
VOUT = 1.5V
0.1 1 10
LOAD CURRENT (A)
0.5
0
3613 TA01a
3613f
1
Datasheet pdf - http://www.DataSheet4U.net/


Linear Technology Electronic Components Datasheet

LTC3613 Datasheet

15A Monolithic Step Down Regulator

No Preview Available !

www.DataSheet.co.kr
LTC3613
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage (PVIN, SVIN)....................... –0.3V to 24V
Boost Voltage ............................................ –0.3V to 30V
SW Voltage ................................................ –0.3V to 24V
INTVCC, EXTVCC, (BOOST-SW), MODE /PLLIN,
VRNG, PGOOD, RUN Voltages....................... –0.3V to 6V
VOSNS+, VOSNS– Voltages ........ –0.6V to (INTVCC + 0.3V)
VOUT, SENSE+, SENSEVoltages ................. –0.6V to 6V
RT, ITH Voltages ..................... –0.3V to (INTVCC + 0.3V)
TRACK/SS Voltages..................................... –0.3V to 5V
Operating Junction Temperature Range
(Notes 2, 4)............................................ –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
PVIN 1
PVIN 2
PVIN 3
PVIN 4
PVIN 5
PVIN 6
PVIN 7
PVIN 8
PVIN 9
SW 10
BOOST 11
SGND 12
PGOOD 13
SNS+ 14
SNS– 15
SGND 16
PVIN SW
57 58
SGND
59
44 PGND
43 PGND
42 PGND
41 PGND
40 PGND
39 PGND
38 PGND
37 PGND
36 PGND
35 SW
34 INTVCC
33 INTVCC
32 SVIN
31 MODE/PLLIN
30 EXTVCC
29 SGND
WKH PACKAGE
56-LEAD (7mm × 9mm) MULTIPAD QFN
TJMAX = 125°C, θJA = 29°C/W
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3613EWKH#PBF
LTC3613EWKH#TRPBF LTC3613WKH
56-Lead (7mm × 9mm) Plastic QFN
–40°C to 125°C
LTC3613IWKH#PBF
LTC3613IWKH#TRPBF LTC3613WKH
56-Lead (7mm × 9mm) Plastic QFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
2
3613f
Datasheet pdf - http://www.DataSheet4U.net/


Part Number LTC3613
Description 15A Monolithic Step Down Regulator
Maker Linear Technology
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LTC3613 Datasheet PDF






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