EXPOSED PAD (PIN 11) IS PGND, MUST BE SOLDERED TO PCB
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 120°C/W
orDer inForMaTion
LEAD FREE FINISH
LTC3411AEDD#PBF
LTC3411AIDD#PBF
LTC3411AEMS#PBF
LTC3411AIMS#PBF
TAPE AND REEL
LTC3411AEDD#TRPBF
LTC3411AIDD#TRPBF
LTC3411AEMS#TRPBF
LTC3411AIMS#TRPBF
PART MARKING*
LAJM
LAJM
LTAJK
LTAJK
PACKAGE DESCRIPTION
10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN
10-Lead Plastic MSOP
10-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *Temperature grades are 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/
The
l
denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 3.6V, R
T
= 125k unless otherwise specified. (Note 2)
SYMBOL
V
IN
I
FB
V
FB
ΔV
LINEREG
ΔV
LOADREG
g
m(EA)
PARAMETER
Operating Voltage Range
Feedback Pin Input Current
Feedback Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
Error Amplifier Transconductance
(Note 3)
(Note 3)
V
IN
= 2.5V to 5.5V
I
TH
= 0.55V to 0.9V
I
TH
Pin Load = ±5µA (Note 3)
l
l
elecTrical characTerisTics
CONDITIONS
l
MIN
2.5
0.784
TYP
MAX
5.5
±0.1
UNITS
V
µA
V
%/V
%
µS
3411afd
0.8
0.04
0.02
300
0.816
0.2
0.2
2
For more information
www.linear.com/LTC3411A
LTC3411A
The
l
denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 3.6V, R
T
= 125k unless otherwise specified. (Note 2)
SYMBOL
I
S
PARAMETER
Input DC Supply Current (Note 4)
Active Mode
Sleep Mode
Shutdown
Shutdown Threshold High Active
Oscillator Resistor
Oscillator Frequency
Synchronization Frequency
Peak Switch Current Limit
Top Switch On-Resistance
Bottom Switch On-Resistance
I
SW(LKG)
V
UVLO
PGOOD
Switch Leakage Current
Undervoltage Lockout Threshold
Power Good Threshold
Power Bad Threshold
R
PGOOD
PGOOD Blanking
V
SYNC-MODE
t
SOFT-START
Pulse Skip
Force Continuous
Burst
Power Good Pull-Down On-Resistance
CONDITIONS
V
SYNC/MODE
= 3.6V, V
FB
= 0.75V
V
SYNC/MODE
= 3.6V, V
FB
= 0.84V
V
SHDN/RT
= 3.6V
R
T
= 125k
(Note 7)
(Note 7)
V
FB
= 0.5V
MS Package
DD Package (Note 6)
MS Package
DD Package (Note 6)
V
IN
= 5.5V, V
SHDN/RT
= 5.5V, V
SW
= 0V
or 5.5V
V
IN
Ramping Down
V
FB
Ramping Up from 0.68V to 0.8V
V
FB
Ramping Down from 0.92V to 0.8V
V
FB
Ramping Down from 0.8V to 0.68V
V
FB
Ramping Up from 0.8V to 0.9V
V
FB
Step from 0V to 0.8V
V
FB
Step from 0.8V to 0V
V
IN
= 2.5V to 5.5V
V
IN
= 2.5V to 5.5V
V
IN
= 2.5V to 5.5V
10% to 90% of Regulation
2.25
0.4
1.6
2.1
0.15
0.15
0.13
0.13
0.01
1.8
–5
5
2.1
–7
7
–10
10
15
40
105
1.2
V
IN
– 0.6
0.5
0.6
V
IN
– 1.1
0.8
1.0
MIN
TYP
330
40
0.1
V
IN
– 0.6
125k
2.5
MAX
450
60
1
V
IN
– 0.4
1M
2.8
4
4
2.6
0.18
0.16
1
2.4
UNITS
µA
µA
µA
V
Ω
MHz
MHz
MHz
A
Ω
Ω
Ω
Ω
µA
V
%
%
%
%
Ω
µs
µs
V
V
V
ms
elecTrical characTerisTics
V
SHDN/RT
f
OSC
f
SYNC
I
LIM
R
DS(ON)
–12
12
30
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 LTC3411A is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTC3411AE is guaranteed to meet performance specifications
from 0°C to 85°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3411AI is guaranteed over the full –40°C to 125°C operating junction
temperature range. The maximum ambient temperature consistent with
these specifications is determined by specific operating conditions in
conjunction with board layout, the rated package thermal resistance and
other environmental factors.
Note 3:
The LTC3411A is tested in a feedback loop which servos V
FB
to the
midpoint for the error amplifier (V
ITH
= 0.7V).
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 formulas:
LTC3411AEDD: T
J
= T
A
+ (P
D
• 43°C/W)
LTC3411AEMS: T
J
= T
A
+ (P
D
• 120°C/W)
Note 6:
For the DD package, switch on-resistance is sampled at wafer level
measurements and assured by design, characterization and correlation
with statistical process controls.
Note 7:
4MHz operation is guaranteed by design but not production tested
and is subject to duty cycle limitations (see Applications Information).
Note 8:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
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