LTC3858-1 Linear Technology Corporation, LTC3858-1 Datasheet - Page 2

• Manufacturer Part Number: LTC3858-1
• Description: Dual 2-Phase Synchronous Step-Down Controller
• Manufacturer: Linear Technology Corporation

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ABSOLUTE MAXIMUM RATINGS
LTC3858-1
Input Supply Voltage (V
Topside Driver Voltages
Switch Voltage (SW1, SW2) ........................ –5V to 40V
(BOOST1-SW1), (BOOST2-SW2) ................ –0.3V to 6V
RUN1, RUN2 ............................................... –0.3V to 8V
SENSE1
SENSE2
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH
LTC3858EUFD-1#PBF
LTC3858IUFD-1#PBF
LTC3858EGN-1#PBF
LTC3858IGN-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:
For more information on tape and reel specifi cations, go to:
2
BOOST1, BOOST2 ................................. –0.3V to 46V
Maximum Current Sourced Into Pin
from Source >8V...............................................100μA
+
–
, SENSE2
Voltages ...................................... –0.3V to 28V
EXPOSED PAD (PIN 29) IS SGND, MUST BE SOLDERED TO PCB
PLLIN/MODE
SENSE1
SENSE1
SENSE2
SGND
RUN1
RUN2
FREQ
28-LEAD (4mm 5mm) PLASTIC QFN
+
+
–
–
, SENSE1
T
1
2
3
4
5
6
7
8
JMAX
TAPE AND REEL
LTC3858EUFD-1#TRPBF
LTC3858IUFD-1#TRPBF
LTC3858EGN-1#TRPBF
LTC3858IGN-1#TRPBF
28 27 26 25 24
9 10
IN
= 125°C, θ
UFD PACKAGE
) ......................... –0.3V to 40V
TOP VIEW
11 12 13
–
29
JA
= 43°C/W
14
23
22
21
20
19
18
17
16
15
BOOST1
BG1
V
PGND
EXTV
INTV
BG2
BOOST2
http://www.linear.com/leadfree/
IN
PART MARKING*
38581
38581
LTC3858GN-1
LTC3858GN-1
CC
CC
http://www.linear.com/tapeandreel/
(Note 1)
PLLIN/MODE, FREQ Voltages .............. –0.3V to INTV
EXTV
I
PGOOD1 Voltage ......................................... –0.3V to 6V
SS1, SS2, INTV
Operating Temperature Range (Note 2).. –40°C to 125°C
Maximum Junction Temperature (Note 3) ............ 125°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TH1
PACKAGE DESCRIPTION
28-Lead (4mm × 5mm) Plastic QFN
28-Lead (4mm × 5mm) Plastic QFN
28-Lead Plastic SSOP
28-Lead Plastic SSOP
, I
CC
TH2
...................................................... –0.3V to 14V
,V
PLLIN/MODE
FB1
SENSE1
SENSE1
SENSE2
SENSE2
, V
CC
SGND
RUN1
RUN2
FREQ
V
V
I
I
SS2
FB2
TH1
TH2
FB1
FB2
Voltages ......................... –0.3V to 6V
+
–
–
+
T
JMAX
28-LEAD PLASTIC SSOP
Voltages ...................... –0.3V to 6V
10
11
12
13
14
1
2
3
4
5
6
7
8
9
= 125°C, θ
GN PACKAGE
TOP VIEW
JA
= 90°C/W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
SS1
PGOOD1
TG1
SW1
BOOST1
BG1
V
PGND
EXTV
INTV
BG2
BOOST2
SW2
TG2
IN
CC
CC
38581f
CC