ltc3858-2 Linear Technology Corporation, ltc3858-2 Datasheet - Page 2

• Manufacturer Part Number: ltc3858-2
• Description: Ltc3858-2 - Low Iq, Dual 2-phase Synchronous Step-down Controller
• Manufacturer: Linear Technology Corporation

ABSOLUTE MAXIMUM RATINGS
LTC3858-2
(Note 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
PLLIN/MODE Voltage ................................... –0.3V to 6V
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-2#PBF
LTC3858IUH-2#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:
For more information on tape and reel specifications, go to:
ELECTRICAL CHARACTERISTICS
SYMBOL
V
V
I
V
2
junction temperature range, otherwise specifications are at T
otherwise noted.
FB1,2
LIM
TH1
IN
FB1,2
REFLNREG
BOOST1, BOOST2 ................................. –0.3V to 46V
Maximum Current Sourced into Pin
from Source >8V ..............................................100μA
, PHASMD, FREQ Voltages ............. –0.3V to INTV
, I
CC
TH2
+
–
, SENSE2
..................................................... –0.3V to 14V
,V
Voltages ..................................... –0.3V to 28V
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-2#TRPBF
LTC3858IUH-2#TRPBF
IN
) ......................... –0.3V to 40V
–
http://www.linear.com/leadfree/
CONDITIONS
(Note 4) I
(Note 4)
(Note 4) V
–40°C to 125°C
–40°C to 85°C
PART MARKING*
38582
38582
http://www.linear.com/tapeandreel/
TH1,2
IN
= 4.5V to 38V
The
= 1.2V
A
CC
= 25°C (Note 2). V
l
denotes the specifications which apply over the full operating
PIN CONFIGURATION
PACKAGE DESCRIPTION
32-Lead (5mm × 5mm) Plastic QFN
32-Lead (5mm × 5mm) Plastic QFN
PLLIN/MODE
PHASMD
SENSE1
EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
CLKOUT
IN
SGND
RUN1
RUN2
FREQ
= 12V, V
–
1
2
3
4
5
6
7
8
32-LEAD (5mm 5mm) PLASTIC QFN
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
RUN1,2
T
JMAX
= 125°C, θ
l
UH PACKAGE
= 5V, EXTV
TOP VIEW
SGND
33
0.788
0.792
MIN
JA
4
= 34°C/W
CC
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
= 0V unless
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
38582f
%/V
nA
V
V
V