LTC3851A-1_15 Datasheet, PDF (2/30 Pages) Linear Technology – Synchronous Step-Down Switching Regulator Controller

LTC3851A-1
Absolute Maximum Ratings (Note 1)
Input Supply Voltage (V_IN).......................... 40V to –0.3V
Topside Driver Voltage (BOOST)................. 46V to –0.3V
Switch Voltage (SW)...................................... 40V to –5V
INTV_CC, (BOOST – SW), RUN, PGOOD......... 6V to –0.3V
TK/SS....................................................INTV_CC to –0.3V
SENSE⁺, SENSE^–........................................... 6V to –0.3V
MODE/PLLIN, FREQ/PLLFLTR...............INTV_CC to –0.3V
I_TH, V_FB Voltages.......................................... 3V to –0.3V
INTV_CC Peak Output Current...................................50mA
Operating Junction Temperature Range (Notes 2, 3)
E-Grade, I-Grade................................. –40°C to 125°C
H-Grade.............................................. –40°C to 150°C
MP-Grade........................................... –55°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MSE................................................................... 300°C
Pin Configuration
TOP VIEW
MODE/PLLIN 1
16 SW
FREQ/PLLFLTR 2
15 TG
RUN 3
14 BOOST
TK/SS 4
17
13 V_IN
I_TH 5
GND
12 INTV_CC
FB 6
11 BG
SENSE^– 7
10 GND
SENSE⁺ 8
9 PGOOD
MSE PACKAGE
16-LEAD PLASTIC MSOP
T_JMAX = 125°C, θ_JA = 35°C/W TO 40°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
16 15 14 13
RUN 1
12 BOOST
TK/SS 2
17
11 V_IN
I_TH 3
GND
10 INTV_CC
FB 4
9 BG
5678
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 68°C/W, θ_JC = 4.2°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3851AEMSE-1#PBF LTC3851AEMSE-1#TRPBF 3851A1
16-Lead Plastic MSOP
–40°C to 125°C
LTC3851AIMSE-1#PBF LTC3851AIMSE-1#TRPBF
3851A1
16-Lead Plastic MSOP
–40°C to 125°C
LTC3851AHMSE-1#PBF LTC3851AHMSE-1#TRPBF 3851A1
16-Lead Plastic MSOP
–40°C to 150°C
LTC3851AMPMSE-1#PBF LTC3851AMPMSE-1#TRPBF 3851A1
16-Lead Plastic MSOP
–55°C to 150°C
LTC3851AEUD-1#PBF
LTC3851AEUD-1#TRPBF
LFQB
16-Lead (3mm × 3mm) Plastic QFN –40°C to 125°C
LTC3851AIUD-1#PBF
LTC3851AIUD-1#TRPBF
LFQB
16-Lead (3mm × 3mm) Plastic QFN –40°C to 125°C
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/
3851a1fa
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