Voltage ..................................................– 0.3V to 6V
V
FB1
, V
FB2
Voltages...................................– 0.3V to 1.5V
RUN/SS1, RUN/SS2 Voltages ..................... – 0.3V to V
IN
MODE/SYNC Voltage .................................. – 0.3V to V
IN
SW1, SW2 Voltages ....................... – 0.3V to V
IN
+ 0.3V
POR Voltage ................................................– 0.3V to 6V
PI CO FIGURATIO
TOP VIEW
V
FB1
RUN/SS1
V
IN
SW1
GND
1
2
3
4
5
11
10
V
FB2
9
RUN/SS2
8
POR
7
SW2
6
MODE/SYNC
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 45°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS PGND, MUST BE CONNECTED TO GND
ORDER I FOR ATIO
LEAD FREE FINISH
LTC3407AEDD-2#PBF
LTC3407AEMSE-2#PBF
LTC3407AIDD-2#PBF
LTC3407AIMSE-2#PBF
LEAD BASED FINISH
LTC3407AEDD-2
LTC3407AEMSE-2
LTC3407AIDD-2
LTC3407AIMSE-2
TAPE AND REEL
LTC3407AEDD-2#TRPBF
LTC3407AEMSE-2#TRPBF
LTC3407AIDD-2#TRPBF
LTC3407AIMSE-2#TRPBF
TAPE AND REEL
LTC3407AEDD-2#TR
LTC3407AEMSE-2#TR
LTC3407AIDD-2#TR
LTC3407AIMSE-2#TR
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
U
U
W W
U
W
W
U
U
U
TOP VIEW
V
FB1
RUN/SS1
V
IN
SW1
GND
1
2
3
4
5
10
9
8
7
6
V
FB2
RUN/SS2
POR
SW2
MODE/SYNC
11
MSE PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 45°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS PGND, MUST BE CONNECTED TO GND
PART MARKING*
LDDH
LTDDJ
LDDH
LTDDJ
PART MARKING*
LDDH
LTDDJ
LDDH
LTDDJ
PACKAGE DESCRIPTION
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead Plastic MSOP
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead Plastic MSOP
PACKAGE DESCRIPTION
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead Plastic MSOP
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
3407a2f
LTC3407A-2
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.6V, unless otherwise specified. (Note 2)
SYMBOL
V
IN
I
FB
V
FB
ΔV
LINE REG
ΔV
LOAD REG
I
S
PARAMETER
Operating Voltage Range
Feedback Pin Input Current
Feedback Voltage (Note 3)
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Supply Current
Active Mode
Sleep Mode
Shutdown
Oscillator Frequency
Synchronization Frequency
Peak Switch Current Limit
Top Switch On-Resistance
Bottom Switch On-Resistance
Switch Leakage Current
Power-On Reset Threshold
Power-On Reset On-Resistance
Power-On Reset Delay
V
RUN
I
RUN
V
MODE
RUN/SS Threshold Low
RUN/SS Threshold High
RUN/SS Leakage Current
MODE Threshold Low
MODE Threshold High
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LTC3407AE-2 is guaranteed to meet specified performance
from 0°C to 85°C. Specifications over the – 40°C and 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3407AI-2 is guaranteed over the
full –40°C to 125°C operating temperature range.
●
●
●
ELECTRICAL CHARACTERISTICS
CONDITIONS
●
●
MIN
2.5
0.588
0.585
TYP
MAX
5.5
30
UNITS
V
nA
V
V
%/V
%
0°C
≤
T
A
≤
85°C
–40°C
≤
T
A
≤
125°C (Note 2)
V
IN
= 2.5V to 5.5V (Note 3)
MODE/SYNC = 0V (Note 3)
(Note 4)
V
FB1
= V
FB2
= 0.5V
V
FB1
= V
FB2
= 0.63V, MODE/SYNC = 3.6V
RUN = 0V, V
IN
= 5.5V, MODE/SYNC = 0V
V
FBX
= 0.6V
V
IN
= 3V, V
FBX
= 0.5V, Duty Cycle <35%
(Note 6)
(Note 6)
V
IN
= 5V, V
RUN
= 0V, V
FBX
= 0V
V
FBX
Ramping Up, MODE/SYNC = 0V
V
FBX
Ramping Down, MODE/SYNC = 0V
●
0.6
0.6
0.3
0.5
700
40
0.1
0.612
0.612
0.5
950
60
1
2.7
1.6
0.45
0.45
1
μA
μA
μA
MHz
MHz
A
Ω
Ω
μA
%
%
f
OSC
f
SYNC
I
LIM
R
DS(ON)
I
SW(LKG)
POR
●
1.8
1
2.25
2.25
1.2
0.35
0.30
0.01
8.5
–8.5
100
65,536
200
1.5
2
1
0.5
V
IN
Ω
Cycles
V
V
μA
V
V
0.3
1
0.01
0
V
IN
– 0.5
Note 3:
The LTC3407A-2 is tested in a proprietary test mode that connects
V
FB
to the output of the error amplifier.
Note 4:
Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5:
T
J
is calculated from the ambient T
A
and power dissipation P
D
according to the following formula: T
J
= T
A
+ (P
D
•
θ
JA
).
Note 6:
The DFN switch on-resistance is guaranteed by correlation to
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