LTC3605A
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
TOP VIEW
CLKOUT
INTV
CC
BOOST
CLKIN
SGND
SV
IN
18 PV
IN
17 PV
IN
25
PGND
16 SW
15 SW
14 SW
13 SW
7
RUN
8
PGOOD
9 10 11 12
PGND
SW
V
ON
SW
PV
IN
, SV
IN
, SW Voltage .............................. –0.3V to 22V
SW Transient Voltage ................................. –2V to 24.5V
BOOST Voltage .......................... –0.3V to PV
IN
+ INTV
CC
RUN Voltage ............................................. –0.3V to SV
IN
V
ON
Voltage ............................................... –0.3V to SV
IN
INTV
CC
Voltage.......................................... –0.3V to 3.6V
ITH, RT, CLKOUT, PGOOD Voltage ......... –0.3V to INTV
CC
CLKIN, PHMODE, MODE Voltage .......... –0.3V to INTV
CC
TRACK/SS, FB Voltage .......................... –0.3V to INTV
CC
Operating Junction Temperature Range
(Note 2).................................................. –40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
24 23 22 21 20 19
RT 1
PHMODE 2
MODE 3
FB 4
TRACK/SS 5
ITH 6
UF PACKAGE
24-LEAD (4mm
×
4mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 37°C/W
EXPOSED PAD (PIN 25) IS PGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC3605AEUF#PBF
LTC3605AIUF#PBF
TAPE AND REEL
LTC3605AEUF#TRPBF
LTC3605AIUF#TRPBF
PART MARKING*
3605A
3605A
PACKAGE DESCRIPTION
24-Lead (4mm
×
4mm) Plastic QFN
24-Lead (4mm
×
4mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–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
SYMBOL
SV
IN
PV
IN
I
Q
V
FB
DV
FB(LINE)
DV
FB(LOAD)
I
FB
g
m
(EA)
t
ON(MIN)
t
OFF(MIN)
PARAMETER
SV
IN
Supply Range
V
IN
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
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
J
≈ T
A
= 25°C. (Note 2)
CONDITIONS
MIN
4
1.2
(Note 3)
Mode = 0, R
T
= 162k
V
IN
=12V, RUN = 0
ITH =1.2V (Note 4)
V
IN
= 4V to 20V, ITH = 1.2V
l
l
l
TYP
MAX
20
20
UNITS
V
V
mA
µA
V
%/V
%
nA
mS
ns
ns
3605af
1.5
11
0.594
0.600
0.001
0.1
1.15
1.35
40
70
5
40
0.606
0.03
0.3
±30
1.6
ITH = 1.2V
2
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
