LTC3857-1_15 Datasheet, PDF (2/38 Pages) Linear Technology – Low IQ, Dual, 2-Phase Synchronous Step-Down Controller

LTC3857-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (V_IN) ......................... –0.3V to 40V
Topside Driver Voltages
BOOST1, BOOST2 ................................. –0.3V to 46V
Switch Voltage (SW1, SW2) ........................ –5V to 40V
(BOOST1-SW1), (BOOST2-SW2), INTV_CC ... –0.3V to 6V
RUN1, RUN2................................................ –0.3V to 8V
Maximum Current Sourced into Pin
from Source >8V...............................................100μA
SENSE1⁺, SENSE2⁺, SENSE1^–
SENSE2^– Voltages...................................... –0.3V to 28V
PLLIN/MODE, FREQ Voltages .............. –0.3V to INTV_CC
EXTV_CC ...................................................... –0.3V to 14V
I_TH1, I_TH2,V_FB1, V_FB2 Voltages ...................... –0.3V to 6V
PGOOD1 Voltage ......................................... –0.3V to 6V
TRACK/SS1, TRACK/SS2 Voltages .............. –0.3V to 6V
Operating Junction Temperature Range
(Note 2).................................................. –40°C to 125°C
Maximum Junction Temperature (Note 3) ............ 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
I_TH1 1
V_FB1 2
SENSE1⁺ 3
SENSE1^– 4
FREQ 5
PLLIN/MODE 6
SGND 7
RUN1 8
RUN2 9
SENSE2^– 10
SENSE2⁺ 11
V_FB2 12
I_TH2 13
TRACK/SS2 14
28 TRACK/SS1
27 PGOOD1
26 TG1
25 SW1
24 BOOST1
23 BG1
22 V_IN
21 PGND
20 EXTV_CC
19 INTV_CC
18 BG2
17 BOOST2
16 SW2
15 TG2
GN PACKAGE
28-LEAD PLASTIC SSOP
T_JMAX = 125°C, θ_JA = 90°C/W
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3857EGN-1#PBF
LTC3857EGN-1#TRPBF LTC3857GN-1
28-Lead Plastic SSOP
–40°C to 125°C
LTC3857IGN-1#PBF
LTC3857IGN-1#TRPBF LTC3857GN-1
28-Lead Plastic SSOP
–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/
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