Datasheet

LTC3878
2
3878fa
absoluTe MaxiMuM raTings
Input Supply Voltage (V
IN
) ......................... –0.3V to 40V
I
ON
Voltage ................................................. –0.3V to 40V
BOOST Voltage .......................................... –0.3V to 46V
SW Voltage ................................................... –5V to 40V
INTV
CC
, (BOOST-SW), RUN/SS,
PGOOD Voltages .......................................... –0.3V to 6V
FCB, V
RNG
Voltages .................... –0.3V to INTV
CC
+ 0.3V
V
FB
, I
TH
Voltages ....................................... –0.3V to 2.7V
Operating Temperature Range (Note 4).... –40°C
to 85°C
Junction Temperature (Note 2) ............................. 125°C
Storage
Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ..................
300°C
(Note 1)
GN PACKAGE
16-LEAD PLASTIC SSOP NARROW
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
RUN/SS
PGOOD
V
RNG
FCB
I
TH
SGND
I
ON
V
FB
BOOST
TG
SW
PGND
BG
INTV
CC
V
IN
NC
T
JMAX
= 125°C, θ
JA
= 110°C/W
pin conFiguraTion
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Main Control Loop
Input Operating Voltage Range 4 38 V
I
Q
Input DC Supply Current
Normal
Shutdown
Supply Current
1500
18
2000
35
µA
µA
V
FBREF
Feedback Reference Voltage I
TH
= 1.2V (Note 3)
l
0.792 0.8 0.808 V
Feedback Voltage Line Regulation V
IN
= 4V to 38V, I
TH
= 1.2V (Note 3) 0.002 %/V
Feedback Voltage Load Regulation I
TH
= 0.5V to 1.9V (Note 3)
l
–0.05 –0.3 %
I
FB
Feedback Input Current V
FB
= 0.8V –5 ±50 nA
g
m(EA)
Error Amplifier Transconductance I
TH
= 1.2V (Note 3) 1.4 1.7 2 mS
V
FCB
FCB Threshold 0.76 0.8 0.84 V
FCB Pin Current V
FCB
= 0.8V 0 ±1 µA
t
ON
On-Time I
ON
= 30µA
I
ON
= 15µA
198
396
233
466
268
536
ns
ns
t
ON(MIN)
Minimum On-Time I
ON
= 180µA 43 75 ns
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 15V unless otherwise noted.
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3878EGN#PBF LTC3878EGN#TRPBF 3878 16-Lead
Plastic SSOP –40°C to 85°C (Note 4)
LTC3878IGN#PBF LTC3878IGN#TRPBF 3878 16-Lead
Plastic SSOP –40°C to 85°C (Note 4)
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/