LTC3858 Linear Technology, LTC3858 Datasheet - Page 2

• Manufacturer Part Number: LTC3858
• Description: Synchronous Step-Down Controller
• Manufacturer: Linear Technology

absoluTe MaxiMuM raTings
LTC3858
(Note 1)
Input Supply Voltage (V
Topside Driver Voltages
BOOST1, BOOST2 . ................................ –0.3V to 46V
Switch Voltage (SW1, SW2) ........................ –5V to 40V
(BOOST1-SW1), (BOOST2-SW2) . ............... –0.3V to 6V
RUN1, RUN2 . .............................................. –0.3V to 8V
Maximum Current Sourced into Pin
from Source >8V...............................................100µA
SENSE1
SENSE2
PLLIN/MODE, FREQ Voltages .............. –0.3V to INTV
I
EXTV
I
PGOOD1, PGOOD2 Voltages ....................... –0.3V to 6V
SS1, SS2, INTV
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
orDer inForMaTion
LEAD FREE FINISH
LTC3858EUH#PBF
LTC3858IUH#PBF
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/
elecTrical characTerisTics
SYMBOL
V
V
I
V

junction temperature range, otherwise specifications are at T
FB1,2
LIM
TH1
IN
FB1,2
REFLNREG
, PHASMD Voltages ....................... –0.3V to INTV
, I
CC
TH2
. ..................................................... –0.3V to 14V
+
–
, SENSE2
Voltages . ..................................... –0.3V to 28V
,V
FB1
PARAMETER
Input Supply Operating Voltage Range
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
, V
CC
FB2
Voltages ......................... –0.3V to 6V
+
, SENSE1
Voltages ...................... –0.3V to 6V
TAPE AND REEL
LTC3858EUH#TRPBF
LTC3858IUH#TRPBF
IN
) ......................... –0.3V to 40V
–
PART MARKING*
3858
3858
CONDITIONS
(Note 4) I
–40°C to 125°C
–40°C to 85°C
(Note 4)
(Note 4) V
The
TH1,2
A
IN
CC
CC
= 25°C. V
= 4.5V to 38V
l
= 1.2V
denotes the specifications which apply over the full operating
pin conFiguraTion
IN
PACKAGE DESCRIPTION
32-Lead (5mm × 5mm) Plastic QFN
32-Lead (5mm × 5mm) Plastic QFN
= 12V, V
PLLIN/MODE
SENSE1
PHASMD
CLKOUT
EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
SGND
RUN1
RUN2
FREQ
RUN1,2
–
1
2
3
4
5
6
7
8
32-LEAD (5mm 5mm) PLASTIC QFN
= 5V, EXTV
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
T
JMAX
= 125°C, θ
l
UH PACKAGE
TOP VIEW
CC
SGND
33
0.788
0.792
= 0V unless otherwise noted.
MIN
JA
4
= 34°C/W
www.DataSheet4U.com
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
0.800
0.800
0.002
TYP
±5
24
23
22
21
20
19
18
17
BOOST1
BG1
V
PGND
EXTV
INTV
BG2
BOOST2
IN
0.812
0.808
MAX
0.02
±50
38
CC
CC
UNITS
3858fa
%/V
nA
V
V
V