LTC3414
2
3414fb
Input Supply Voltage ................................... –0.3V to 6V
I
TH
, RUN/SS, V
FB
,
SYNC/MODE Voltages .................................. –0.3 to V
IN
SW Voltages ................................. –0.3V to (V
IN
+ 0.3V)
Peak SW Sink and Source Current ......................... 9.5A
Operating Temperature Range (Note 2)
E, I Grades .............................................. –40°C to 85°C
MP Grade ............................................. – 55°C to 125°C
Junction Temperature (Notes 5, 6) ....................... 125°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ORDER PART
NUMBER
EXPOSED PAD (PIN 21), MUST BE SOLDERED TO PCB
T
JMAX
= 125°C, θ
JA
= 38°C/W, θ
JC
= 10°C/W
LTC3414EFE
LTC3414IFE
LTC3414MPFE
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
ELECTRICAL CHARACTERISTICS
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 LTC3414E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3414I is guaranteed over the full
–40°C to 85°C operating temperature range. The LTC3414MP is
guaranteed over the full –55°C to 125°C operating tempaerature range.
Note 3: The LTC3414 is tested in a feedback loop that adjusts V
FB
to
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.3V unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Voltage Range ● 2.25 5.5 V
I
FB
Feedback Pin Input Current (Note 3) 0.2 μA
V
FB
Regulated Feedback Voltage E, I Grade (Note 3) ● 0.784 0.800 0.816 V
MP Grade 0.780 0.800 0.816 V
ΔV
FB
Reference Voltage Line Regulation V
IN
= 2.7V to 5.5V (Note 3) ● 0.04 0.2 %V
V
LOADREG
Output Voltage Load Regulation Measured in Servo Loop, V
ITH
= 0.36V ● 0.02 0.2 %
Mesured in Servo Loop, V
ITH
= 0.84V ● –0.02 –0.2 %
ΔV
PGOOD
Power Good Range ±7.5 ±9%
R
PGOOD
Power Good Resistance 120 200 Ω
I
Q
Input DC Bias Current (Note 4)
Active Current V
FB
= 0.75V, V
ITH
= 1.2V 250 330 μA
Sleep V
FB
= 1V, V
ITH
= 0V, V
SYNC/MODE
= 0V 64 100 μA
Shutdown V
RUN
= 0V 0.02 1 μA
f
OSC
Switching Frequency R
OSC
= 294k 0.88 1.00 1.12 MHz
Switching Frequency Range 0.3 4 MHz
f
SYNC
SYNC Capture Range 0.3 4 MHz
R
PFET
R
DS(ON)
of P-Channel FET I
SW
= 300mA 67 100 mΩ
R
NFET
R
DS(ON)
of N-Channel FET I
SW
= –300mA 50 100 mΩ
I
LIMIT
Peak Current Limit 6 8 A
V
UVLO
Undervoltage Lockout Threshold 1.75 2.00 2.25 V
I
LSW
SW Leakage Current V
RUN
= 0V, V
IN
= 5.5V 0.1 1.0 μA
V
RUN
RUN Threshold 0.5 0.65 0.8 V
1
2
3
4
5
6
7
8
9
10
TOP VIEW
20
19
18
17
16
15
14
13
12
11
PGND
RT
SYNC/MODE
RUN/SS
SGND
NC
PV
IN
SW
SW
PGND
PGND
V
FB
I
TH
PGOOD
SV
IN
NC
PV
IN
SW
SW
PGND
FE PACKAGE
20-LEAD PLASTIC TSSOP
21
achieve a specified error amplifier output voltage (I
TH
).
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 temperature T
A
and power
dissipation P
D
as follows: T
J
=T
A
+ (P
D
)(38°C/W)
Note 6: 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
temperature may impair device reliabability.
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
