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LTC3605A_15 Datasheet, PDF (2/22 Pages) Linear Technology – 20V, 5A Synchronous Step-Down Regulator
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LTC3605A
Absolute Maximum Ratings
(Note 1)
PVIN, SVIN, SW Voltage.............................. –0.3V to 22V
SW Transient Voltage...................................–2V to 24.5V
BOOST Voltage...........................–0.3V to PVIN + INTVCC
RUN Voltage.............................................. –0.3V to SVIN
VON Voltage................................................ –0.3V to SVIN
INTVCC Voltage.......................................... –0.3V to 3.6V
ITH, RT, CLKOUT, PGOOD Voltage......... –0.3V to INTVCC
CLKIN, PHMODE, MODE Voltage........... –0.3V to INTVCC
TRACK/SS, FB Voltage........................... –0.3V to INTVCC
Operating Junction Temperature Range
(Note 2)................................................... –40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
Pin Configuration
TOP VIEW
RT 1
PHMODE 2
MODE 3
FB 4
TRACK/SS 5
ITH 6
24 23 22 21 20 19
25
PGND
18 PVIN
17 PVIN
16 SW
15 SW
14 SW
13 SW
7 8 9 10 11 12
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN 25) IS PGND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3605AEUF#PBF
LTC3605AEUF#TRPBF 3605A
24-Lead (4mm × 4mm) Plastic QFN –40°C to 125°C
LTC3605AIUF#PBF
LTC3605AIUF#TRPBF 3605A
24-Lead (4mm × 4mm) 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.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TJ ≈ TA = 25°C (Note 2). VIN = 12V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
SVIN
PVIN
IQ
VFB
DVFB(LINE)
DVFB(LOAD)
IFB
gm (EA)
tON(MIN)
tOFF(MIN)
SVIN Supply Range
VIN Power Supply Range
Input DC Supply Current
Active
Shutdown
Feedback Reference Voltage
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Feedback Pin Input Current
Error Amplifier Transconductance
Minimum On-Time
Minimum Off-Time
(Note 3)
Mode = 0, RT = 162k
VIN =12V, RUN = 0
ITH =1.2V (Note 4)
VIN = 4V to 20V, ITH = 1.2V
ITH = 1.2V
4
20
V
1.2
20
V
1.5
5
mA
11
40
µA
l 0.594
0.600
0.606
V
l
0.001
0.03
%/V
l
0.1
0.3
%
±30
nA
1.15
1.35
1.6
mS
40
ns
70
ns
3605afc
2
For more information www.linear.com/LTC3605A
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