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Linear Technology Electronic Components Datasheet

LTC3610 Datasheet

12A Monolithic Synchronous Step-Down DC/DC Converter

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FEATURES
12A Output Current
Wide VIN Range = 4V to 24V
Internal N-Channel MOSFETs
True Current Mode Control
Optimized for High Step-Down Ratios
tON(MIN) ≤100ns
Extremely Fast Transient Response
Stable with Ceramic COUT
±1% 0.6V Voltage Reference
Power Good Output Voltage Monitor
Adjustable On-Time/Switching Frequency
Adjustable Current Limit
Programmable Soft-Start
Output Overvoltage Protection
Optional Short-Circuit Shutdown Timer
Low Shutdown IQ: 15μA
Available in a 9mm × 9mm 64-Pin QFN Package
APPLICATIONS
Point of Load Regulation
Distributed Power Systems
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents including
5481178, 6100678, 6580258, 5847554, 6304066.
LTC3610
24V, 12A Monolithic
Synchronous Step-Down
DC/DC Converter
DESCRIPTION
The LTC®3610 is a high efficiency, monolithic synchronous
step-down DC/DC converter that can deliver up to 12A
output current from a 4V to 24V (28V maximum) input
supply. It uses a valley current control architecture to de-
liver very low duty cycle operation at high frequency with
excellent transient response. The operating frequency is
selected by an external resistor and is compensated for
variations in VIN and VOUT.
The LTC3610 can be configured for discontinuous or
forced continuous operation at light load. Forced continu-
ous operation reduces noise and RF interference while
discontinuous mode provides high efficiency by reducing
switching losses at light loads.
Fault protection is provided by internal foldback current
limiting, an output overvoltage comparator and an optional
short-circuit shutdown timer. Soft-start capability for sup-
ply sequencing is accomplished using an external timing
capacitor. The regulator current limit is user programmable.
A power good output voltage monitor indicates when
the output is in regulation. The LTC3610 is available in a
compact 9mm × 9mm QFN package.
TYPICAL APPLICATION
High Efficiency Step-Down Converter
0.1μF
100pF
470pF
31.83k
VON
RUN/SS
ION
VIN
LTC3610
SW
ITH BOOST
SGND INTVCC
FCB
VRNG
PGOOD PGND
EXTVCC VFB
3610 TA01a
604k
0.47μH
0.22μF
10μF
×3
VIN
4V TO 24V
100μF
×2
VOUT
2.5V
12A
4.7μF
30.1k
9.5k
Efficiency vs Load Current
100
95
90
85
80
75
70
65
60
55
50
0.01
VIN = 5V
VIN = 12V
10000
1000
100
POWER LOSS 12V
POWER LOSS 5V
10
VOUT = 2.5V
1
0.1 1 10
LOAD CURRENT (A)
3610 TA01b
3610fd
1


Linear Technology Electronic Components Datasheet

LTC3610 Datasheet

12A Monolithic Synchronous Step-Down DC/DC Converter

No Preview Available !

LTC3610www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (VIN, ION) .................. 28V to –0.3V
Boosted Topside Driver Supply Voltage
(BOOST) ................................................ 34V to –0.3V
SW Voltage ............................................... 28V to –5V
INTVCC, EXTVCC, (BOOST – SW), RUN/SS,
PGOOD Voltages...................................... 7V to –0.3V
FCB, VON, VRNG Voltages............ INTVCC + 0.3V to –0.3V
ITH, VFB Voltages ....................................... 2.7V to –0.3V
Operating Temperature Range
(Note 4) ............................................... –40°C to 85°C
Junction Temperature (Note 2) ............................. 125°C
Storage Temperature Range................... –55°C to 125°C
PIN CONFIGURATION
TOP VIEW
PGND 1
PGND 2
PGND 3
SW 4
SW 5
SW 6
SW 7
SW 8
SW 9
SW 10
SW 11
PVIN 12
PVIN 13
PVIN 14
PVIN 15
PVIN 16
65
PGND
66
SW
67
PVIN
68
SGND
48 SGND
47 SGND
46 SGND
45 SGND
44 EXTVCC
43 VFB
42 SGND
41 ION
40 SGND
39 FCB
38 ITH
37 VRNG
36 PGOOD
35 VON
34 SGND
33 SGND
WP PACKAGE
64-LEAD (9mm × 9mm) QFN MULTIPAD
TJMAX = 125°C, θJA = 28°C/W
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3610EWP#PBF
LTC3610EWP#TRPBF LTC3610WP
64-Lead (9mm × 9mm) Plastic QFN
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3610EWP
LTC3610EWP#TR
LTC3610WP
64-Lead (9mm × 9mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
TEMPERATURE RANGE
–40°C to 85°C
TEMPERATURE RANGE
–40°C to 85°C
3610fd
2


Part Number LTC3610
Description 12A Monolithic Synchronous Step-Down DC/DC Converter
Maker Linear Technology
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LTC3610 Datasheet PDF





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