EXPOSED PAD (PIN 15) IS GND, MUST BE SOLDERED TO PCB
θ
JA
= 45°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
orDer inFormaTion
LEAD FREE FINISH
LT3980EDE#PBF
LT3980IDE#PBF
LT3980EMSE#PBF
LT3980IMSE#PBF
LT3980HMSE#PBF
TAPE AND REEL
LT3980EDE#TRPBF
LT3980IDE#TRPBF
LT3980EMSE#TRPBF
LT3980IMSE#TRPBF
LT3980HMSE#TRPBF
PART MARKING*
3980
3980
3980
3980
3980
PACKAGE DESCRIPTION
14-Lead (3mm
×
4mm) Plastic DFN
14-Lead (3mm
×
4mm) Plastic DFN
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-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/
elecTrical characTerisTics
PARAMETER
Minimum Input Voltage
V
IN
Overvoltage Lockout
Quiescent Current from V
IN
The
●
denotes the specifications which apply over the full operating temper-
ature 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
58
20
70
TYP
3
61.5
0.01
35
120
MAX
3.6
64
0.5
60
160
UNITS
V
V
µA
µA
µA
3980fa
V
RUN/SS
= 0.2V
V
BD
= 3V, Not Switching
V
BD
= 0, Not Switching
2
For more information
www.linear.com/LT3980
LT3980
elecTrical characTerisTics
PARAMETER
Quiescent Current from BD
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
V
RUN/SS
= 0.2V
V
BD
= 3V, Not Switching
V
BD
= 0, Not Switching
●
MIN
55
782
770
TYP
0.01
82
1
790
790
10
0.002
500
1800
60
60
3.87
2
MAX
0.5
115
5
798
805
40
0.01
UNITS
µA
µA
µA
mV
mV
nA
%/V
µmho
µA
µA
A/V
V
Feedback Voltage
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
R
T
= 8.66k
R
T
= 29.4k
R
T
= 187k
V
FB
= 0.8V, V
C
= 1.2V
4V < V
IN
< 56V
●
1.95
0.86
195
●
2.25
1.07
225
140
4
540
2.4
0.02
1.7
40
6
2.55
1.27
255
230
4.9
3
2
2.2
55
10
2.5
MHz
MHz
kHz
nS
A
mV
A
µA
V
mA
µA
V
V
mV
mV
µA
µA
V
µA
Minimum Switch Off-Time
Switch Current Limit
Switch V
CESAT
DA Pin Current to Pause OSC
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 Threshold
SYNC Pin Bias Current
V
SYNC
= 0V
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 LT3980E 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 LT3980I specifications are
guaranteed over the –40°C to 125°C temperature range. The LT3980H
V
PG
= 5V
V
PG
= 0.4V
V
FB
Rising
I
SW
= 2A
V
RUN/SS
= 2.5V
V
BD
= 0V
Duty Cycle = 5%
I
SW
= 2A
3.3
1.9
●
●
●
0.4
50
65
14
0.1
1
0.775
80
●
200
0.575
700
0.675
0.1
specifications are guaranteed over the –40°C to 150°C operating
temperature 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
guarantee full saturation of the switch.
Note 5:
Absolute Maximum at V
IN
and RUN/SS pins is 80V for non-
repetitive 1 minute transients, and 60V for continuous operation.
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