LTC3878_15 Datasheet, PDF (2/26 Pages) Linear Technology – Fast, Wide Operating Range No RSENSE Step-Down DC/DC Controller

LTC3878
Absolute Maximum Ratings
(Note 1)
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
Pin Configuration
TOP VIEW
RUN/SS 1
PGOOD 2
V_RNG 3
FCB 4
I_TH 5
SGND 6
I_ON 7
V_FB 8
16 BOOST
15 TG
14 SW
13 PGND
12 BG
11 INTV_CC
10 V_IN
9 NC
GN PACKAGE
16-LEAD PLASTIC SSOP NARROW
T_JMAX = 125°C, θ_JA = 110°C/W
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/
Electrical Characteristics 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.
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 2000
µA
18
35
µA
V_FBREF
I_FB
g_m(EA)
V_FCB
t_ON
t_ON(MIN)
Feedback Reference Voltage
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Feedback Input Current
Error Amplifier Transconductance
FCB Threshold
FCB Pin Current
On-Time
Minimum On-Time
I_TH = 1.2V (Note 3)
V_IN = 4V to 38V, I_TH = 1.2V (Note 3)
I_TH = 0.5V to 1.9V (Note 3)
V_FB = 0.8V
I_TH = 1.2V (Note 3)
V_FCB = 0.8V
I_ON = 30µA
I_ON = 15µA
I_ON = 180µA
l 0.792 0.8 0.808
V
0.002
%/V
l
–0.05 –0.3
%
–5
±50
nA
1.4
1.7
2
mS
0.76
0.8
0.84
V
0
±1
µA
198
233
268
ns
396
466
536
ns
43
75
ns
3878fa