LTC3878 Linear Technology Corporation, LTC3878 Datasheet - Page 2

• Manufacturer Part Number: LTC3878
• Description: Wide Operating Range No RSENSE Step-Down Controller
• Manufacturer: Linear Technology Corporation

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ABSOLUTE MAXIMUM RATINGS
LTC3878
(Note 1)
Input Supply Voltage (V
I
BOOST Voltage .......................................... –0.3V to 46V
SW Voltage ................................................... –5V to 40V
INTV
PGOOD Voltages .......................................... –0.3V to 6V
FCB, V
V
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
ORDER INFORMATION
LEAD FREE FINISH
LTC3878EGN#PBF
LTC3878IGN#PBF
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
ELECTRICAL CHARACTERISTICS
SYMBOL
Main Control Loop
I
V
I
g
V
t
t
2
temperature range, otherwise specifi cations are at T
Q
FB
ON
ON(MIN)
ON
m(EA)
FBREF
FCB
FB
, I
Voltage ................................................. –0.3V to 40V
CC
TH
RNG
, (BOOST-SW), RUN/SS,
Voltages ....................................... –0.3V to 2.7V
Voltages .................... –0.3V to INTV
PARAMETER
Input Operating Voltage Range
Input DC Supply Current
Feedback Reference Voltage
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Feedback Input Current
Error Amplifi er Transconductance
FCB Threshold
FCB Pin Current
On-Time
Minimum On-Time
Normal
Shutdown Supply Current
TAPE AND REEL
LTC3878EGN#TRPBF
LTC3878IGN#TRPBF
IN
) ......................... –0.3V to 40V
http://www.linear.com/leadfree/
PART MARKING*
3878
3878
http://www.linear.com/tapeandreel/
A
CC
= 25°C. V
CONDITIONS
I
V
I
V
I
V
I
I
I
TH
TH
TH
ON
ON
ON
IN
FB
FCB
+ 0.3V
The
= 1.2V (Note 3)
= 0.5V to 1.9V (Note 3)
= 1.2V (Note 3)
= 4V to 38V, I
= 30μA
= 15μA
= 180μA
= 0.8V
= 0.8V
l
IN
denotes the specifi cations which apply over the full operating
= 15V unless otherwise noted.
PIN CONFIGURATION
TH
= 1.2V (Note 3)
PACKAGE DESCRIPTION
16-Lead Plastic SSOP
16-Lead Plastic SSOP
RUN/SS
PGOOD
SGND
V
RNG
FCB
V
I
I
16-LEAD PLASTIC SSOP NARROW
ON
TH
FB
T
JMAX
1
2
3
4
5
6
7
8
l
l
= 125°C, θ
GN PACKAGE
TOP VIEW
0.792
0.76
MIN
198
370
1.4
4
JA
= 110°C/W
16
15
14
13
12
11
10
9
0.002
–0.05
1500
TYP
233
440
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
0.8
1.7
0.8
18
–5
43
BOOST
TG
SW
PGND
BG
INTV
V
NC
0
IN
CC
0.808
2000
MAX
–0.3
0.84
±50
268
510
38
35
±1
75
2
UNITS
3878f
%/V
mS
μA
μA
nA
μA
ns
ns
ns
%
V
V
V