Datasheet
LTC3891
2
3891fa
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage (V
IN
) ......................... –0.3V to 65V
Topside Driver Voltage (BOOST)
.................–0.3V to 71V
Switch Voltage (SW)
..................................... –5V to 65V
(BOOST-SW)
................................................ –0.3V to 6V
RUN
............................................................. –0.3V to 8V
Maximum Current Sourced into Pin from
Source > 8V ......................................................100μA
SENSE
+
, SENSE
–
Voltages ......................... –0.3V to 28V
PLLIN/MODE, INTV
CC
Voltages ................... –0.3V to 6V
I
LIM
, FREQ Voltages ..............................–0.3V to INTV
CC
EXTV
CC
...................................................... –0.3V to 14V
(Note 1)
20 19 18 17
7 8
TOP VIEW
21
SGND
UDC PACKAGE
20-LEAD (3mm × 4mm) PLASTIC QFN
9 10
6
5
4
3
2
1
11
12
13
14
15
16
PLLIN/MODE
SGND
SGND
RUN
SENSE
–
SENSE
+
PGND
EXTV
CC
INTV
CC
BG
BOOST
SW
FREQ
TRACK/SS
I
LIM
V
IN
V
FB
ITH
PGOOD
TG
T
JMAX
= 150°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 21) IS SGND, MUST BE SOLDERED TO PCB
1
2
3
4
5
6
7
8
9
10
TOP VIEW
20
19
18
17
16
15
14
13
12
11
TRACK/SS
FREQ
PLLIN/MODE
SGND
SGND
RUN
SENSE
–
SENSE
+
V
FB
ITH
I
LIM
V
IN
PGND
EXTV
CC
INTV
CC
BG
BOOST
SW
TG
PGOOD
21
SGND
FE PACKAGE
20-LEAD PLASTIC TSSOP
T
JMAX
= 150°C, θ
JA
= 38°C/W
EXPOSED PAD (PIN 21) IS SGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3891EUDC#PBF LTC3891EUDC#TRPBF LFXV 20-Lead (3mm × 4mm) Plastic QFN –40°C to 125°C
LTC3891IUDC#PBF LTC3891IUDC#TRPBF LFXV 20-Lead (3mm × 4mm) Plastic QFN –40°C to 125°C
LTC3891HUDC#PBF LTC3891HUDC#TRPBF LFXV 20-Lead (3mm × 4mm) Plastic QFN –40°C to 150°C
LTC3891MPUDC#PBF LTC3891MPUDC#TRPBF LFXV 20-Lead (3mm × 4mm) Plastic QFN –55°C to 150°C
ITH, V
FB
Voltages ......................................... –0.3V to 6V
PGOOD Voltage
............................................ –0.3V to 6V
TRACK/SS Voltage
....................................... –0.3V to 6V
Operating Junction Temperature Range (Notes 2, 3)
LTC3891E, LTC3891I .......................... –40°C to 125°C
LTC3891H .......................................... –40°C to 150°C
LTC3891MP ....................................... –55°C to 150°C
Maximum Junction Temperature (Notes 2, 3)
LTC3891E, LTC3891I ......................................... 125°C
LTC3891H, LTC3891MP .................................... 150°C
Storage Temperature Range
.................. –65°C to 150°C