EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
MSE PACKAGE
10-LEAD PLASTIC MSOP
θ
JA
= 45°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3680EDD#PBF
LT3680IDD#PBF
LT3680EMSE#PBF
LT3680IMSE#PBF
LT3680HMSE#PBF
TAPE AND REEL
LT3680EDD#TRPBF
LT3680IDD#TRPBF
LT3680EMSE#TRPBF
LT3680IMSE#TRPBF
LT3680HMSE#TRPBF
PART MARKING*
LCYK
LCYK
LTCYM
LTCYM
LTCYM
PACKAGE DESCRIPTION
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead Plastic MSOP
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
–40°C to 150°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/
3680fb
2
LT3680
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
Quiescent Current from V
IN
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
RUN/SS
= 10V V
BOOST
= 15V, V
BD
= 3.3V unless otherwise
noted. (Note 2)
CONDITIONS
●
MIN
Quiescent Current from BD
V
RUN/SS
= 0.2V
V
BD
= 3V, Not Switching
V
BD
= 0, Not Switching
V
RUN/SS
= 0.2V
V
BD
= 3V, Not Switching
V
BD
= 0, Not Switching
●
●
Minimum Bias Voltage (BD Pin)
Feedback Voltage
●
780
775
TYP
3
0.01
30
120
0.01
90
1
2.7
790
790
10
0.002
500
2000
60
60
5.3
2.0
2.45
1.1
230
60
5.4
335
0.02
1.5
35
5
MAX
3.6
0.5
65
160
0.5
130
5
3
800
805
40
0.01
UNITS
V
μA
μA
μA
μA
μA
μA
V
mV
mV
nA
%/V
μMho
μA
μA
A/V
V
MHz
MHz
kHz
nS
A
mV
μA
V
mA
μA
V
V
mV
mV
μA
μA
V
V
μA
FB Pin Bias Current (Note 3)
FB Voltage Line Regulation
Error Amp g
m
Error Amp Gain
V
C
Source Current
V
C
Sink Current
V
C
Pin to Switch Current Gain
V
C
Clamp Voltage
Switching Frequency
V
FB
= 0.8V, V
C
= 0.4V
4V < V
IN
< 36V
●
R
T
= 8.66k
R
T
= 29.4k
R
T
= 187k
●
2.2
1.0
200
4.6
Minimum Switch Off-Time
Switch Current Limit
Switch V
CESAT
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 4)
BOOST Pin Current
RUN/SS Pin Current
RUN/SS Input Voltage High
RUN/SS Input Voltage Low
PG Threshold Offset from Feedback Voltage
PG Hysteresis
PG Leakage
PG Sink Current
SYNC Low Threshold
SYNC High Threshold
SYNC Pin Bias Current
Duty Cycle = 5%
I
SW
= 3.5A
V
BOOST
= 10V, V
BD
= 0V
●
2.7
1.25
260
150
6.0
2
2.0
50
8
2.5
I
SW
= 1A
V
RUN/SS
= 2.5V
0.2
V
FB
Rising
V
PG
= 5V
V
PG
= 0.4V
●
200
0.5
65
10
0.1
800
1
0.7
V
SYNC
= 0V
0.1
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 LT3680E is guaranteed to meet performance specifications
from 0°C to 125°C. Specifications over the –40°C to 125°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LT3680I specifications are
guaranteed over the –40°C to 125°C temperature range. The LT3680H
specifications are guaranteed over the –40°C to 150°C operating
temerature range. High junction temperatures degrade operating lifetimes.
Operating lifetime is derated at junction temperatures greater than 125°C.
Note 3:
Bias current flows out of the FB pin.
Note 4:
This is the minimum voltage across the boost capacitor needed to
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