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LTC3857 Datasheet(PDF) 2 Page - Linear Technology

Part # LTC3857
Description  Dual, 2-Phase, Synchronous Controller with Low Value DCR Sensing and Temperature Compensation
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3857 Datasheet(HTML) 2 Page - Linear Technology

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LTC3875
2
3875fb
For more information www.linear.com/LTC3875
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage (VIN)......................... 40V to –0.3V
Topside Driver Voltages
(BOOST1, BOOST2).................................... 46V to –0.3V
Switch Voltage (SW1, SW2).......................... 40V to –5V
INTVCC, RUN(s), PGOOD, EXTVCC
(BOOST-SW1), (BOOST2-SW2).................... 6V to –0.3V
SNSA+(s), SNSD+(s),
SNS–(s) Voltages ..................................INTVCC to –0.3V
(Note 1)
39
40
38 37 36 35 34 33 32 31
11
20
12 13 14 15
TOP VIEW
41
SGND/PGND
UJ PACKAGE
40-LEAD (6mm
× 6mm) PLASTIC QFN
16 17 18 19
22
23
24
25
26
27
28
29
9
8
7
6
5
4
3
2
TK/SS1
VOSNS1+
VOSNS1–
ITH1
ITH2
VOSNS2+
VOSNS2–
TK/SS2
SNSA2+
SNS2–
SW1
TG1
BOOST1
BG1
VIN
INTVCC
EXTVCC
BG2
BOOST2
TG2
21
30
10
1
TJMAX = 125°C, θJA = 33°C/W, θJC = 2.0°C/W
EXPOSED PAD (PIN 41) IS SGND/PGND, MUST BE SOLDERED TO PCB
MODE/PLLIN, ILIM, FREQ, IFAST, ENTMPB
VOSNS(s)+, VOSNS(s)– Voltages ...............INTVCC to –0.3V
ITH1, ITH2, PHASMD, TRSET1, TRSET2,
TCOMP1, TCOMP2, TAVG Voltages.......INTVCC to –0.3V
INTVCC Peak Output Current................................100mA
Operating Junction Temperature Range
(Notes 2, 3)............................................ –40°C to 125°C
Storage Temperature Range .................. –65°C to 125°C
39
40
38 37 36 35 34 33 32 31
11
20
12 13 14 15
TOP VIEW
41
SGND/PGND
UH PACKAGE
40-LEAD (5mm
× 5mm) PLASTIC QFN
16 17 18 19
22
23
24
25
26
27
28
29
9
8
7
6
5
4
3
2
TK/SS1
VOSNS1+
VOSNS1–
ITH1
ITH2
VOSNS2+
VOSNS2–
TK/SS2
SNSA2+
SNS2–
SW1
TG1
BOOST1
BG1
VIN
INTVCC
EXTVCC
BG2
BOOST2
TG2
21
30
10
1
TJMAX = 125°C, θJA = 44°C/W, θJC = 7.3°C/W
EXPOSED PAD (PIN 41) IS SGND/PGND, MUST BE SOLDERED TO PCB


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