ltc3851-1 Linear Technology Corporation, ltc3851-1 Datasheet - Page 2

• Manufacturer Part Number: ltc3851-1
• Description: Synchronous Step-down Switching Regulator Controller
• Manufacturer: Linear Technology Corporation

ABSOLUTE MAXIMUM RATINGS
LTC3851-1
Input Supply Voltage (V
Topside Driver Voltage (BOOST) ................ 46V to –0.3V
Switch Voltage (SW) ..................................... 40V to –5V
INTV
TK/SS .................................................... INTV
SENSE
MODE/PLLIN, FREQ/PLLFLTR ............... INTV
ORDER INFORMATION
LEAD FREE FINISH
LTC3851EMSE-1#PBF
LTC3851IMSE-1#PBF
LTC3851EUD-1#PBF
LTC3851IUD-1#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: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
PIN CONFIGURATION
2
CC
+
, (BOOST – SW), RUN, PGOOD ........ 6V to –0.3V
, SENSE
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
FREQ/PLLFLTR
MODE/PLLIN
–
SENSE
SENSE
.......................................... 6V to –0.3V
T
TK/SS
JMAX
RUN
I
TH
FB
–
+
= 125°C, θ
TAPE AND REEL
LTC3851EMSE-1#TRPBF
LTC3851IMSE-1#TRPBF
LTC3851EUD-1#TRPBF
LTC3851IUD-1#TRPBF
1
2
3
4
5
6
7
8
16-LEAD PLASTIC MSOP
IN
) ......................... 40V to –0.3V
MSE PACKAGE
TOP VIEW
JA
= 35°C/W TO 40°C/W
17
16
15
14
13
12
11
10
9
SW
TG
BOOST
V
INTV
BG
GND
PGOOD
IN
PART MARKING*
38511
38511
LDNT
LDNT
CC
CC
CC
to –0.3V
to –0.3V
(Note 1)
I
INTV
Operating Junction Temperature Range
(Notes 2, 3) ............................................ –40°C to 125°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TH
MSE .................................................................. 300°C
, V
PACKAGE DESCRIPTION
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead (3mm × 3mm) Plastic QFN
16-Lead (3mm × 3mm) Plastic QFN
CC
FB
Peak Output Current ..................................50mA
Voltages .......................................... 3V to –0.3V
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
TK/SS
T
16-LEAD (3mm 3mm) PLASTIC QFN
RUN
JMAX
I
TH
FB
= 125°C, θ
1
2
3
4
16 15 14 13
5
UD PACKAGE
TOP VIEW
6
JA
17
= 68°C/W, θ
7
8
12
11
10
9
JC
= 4.2°C/W
BOOST
V
INTV
BG
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
IN
CC
38511f