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LTC3850EUFD-PBF Datasheet(PDF) 2 Page - Linear Technology

Part # LTC3850EUFD-PBF
Description  Dual, 2-Phase Synchronous Step-Down Switching Controller
Download  36 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3850EUFD-PBF Datasheet(HTML) 2 Page - Linear Technology

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LTC3850/LTC3850-1
2
38501fb
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage (VIN).........................28V to –0.3V
Input Supply Voltage (VIN),
LTC3850I Only ....................................... 30V to –0.3V
Input Supply Transient Voltage (VIN) < 500ms, with
INTVCC ≥ 5V, LTC3850I Only...................34V to –0.3V
Top Side Driver Voltages
BOOST1, BOOST2.................................. 34V to –0.3V
Switch Voltage (SW1, SW2) ......................... 28V to –5V
Switch Voltage (SW1, SW2),
LTC3850I Only ....................................... 30V to –0.3V
INTVCC, RUN1, RUN2, PGOOD, EXTVCC,
(BOOST1-SW1), (BOOST2-SW2)................. 6V to –0.3V
(Note 1)
SENSE1+, SENSE2+, SENSE1–,
SENSE2– Voltages..................................... 5.5V to –0.3V
MODE/PLLIN, ILIM,TK/SS1,TK/SS2, FREQ/PLLFLTR
Voltages ................................................ INTVCC to –0.3V
ITH1, ITH2, VFB1, VFB2 Voltages..................2.7V to –0.3V
INTVCC Peak Output Current ................................100mA
Operating Temperature Range (Note 2)....–40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range...................–65°C to 125°C
Lead Temperature (Soldering, 10 sec)
(GN Package).................................................... 300°C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
GN PACKAGE
28-LEAD NARROW PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RUN1
SENSE1+
SENSE1–
TK/SS1
ITH1
VFB1
SGND
VFB2
ITH2
TK/SS2
SENSE2–
SENSE2+
RUN2
ILIM (EXTVCC)*
FREQ/PLLFLTR
MODE/PLLIN
SW1
TG1
BOOST1
BG1
VIN
INTVCC
BG2
PGND
BOOST2
TG2
SW2
PGOOD
TJMAX = 125°C, θJA = 95°C/W
*PIN 14 = ILIM FOR LTC3850GN, EXTVCC FOR LTC3850GN-1
28 27 26 25 24 23
8
9
TOP VIEW
29
UF PACKAGE
28-LEAD (4mm × 4mm) PLASTIC QFN
10 11 12 13 14
TK/SS1
ITH1
VFB1
VFB2
ITH2
TK/SS2
SENSE2–
BOOST1
BG1
VIN
INTVCC
BG2
PGND
BOOST2
16
15
17
18
19
20
21
6
7
5
4
3
2
1
22
TJMAX = 125°C, θJA = 37°C/W, θJC = 2.6°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
9
10
TOP VIEW
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
SENSE1–
TK/SS1
ITH1
VFB1
VFB2
ITH2
TK/SS2
SENSE2–
BOOST1
BG1
VIN
INTVCC
BG2
PGND
BOOST2
TG2
7
17
18
19
20
21
22
16
8
15
29
TJMAX = 125°C, θJA = 34°C/W, EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
PIN CONFIGURATION


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