ltc3890 Linear Technology Corporation, ltc3890 Datasheet - Page 2

• Manufacturer Part Number: ltc3890
• Description: 60v Low Iq, Dual, 2-phase Synchronous Step-down Dc/dc Controller
• Manufacturer: Linear Technology Corporation

ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
LTC3890
(Note 1)
Input Supply Voltage (V
Topside Driver Voltages
Switch Voltage (SW1, SW2) ........................ –5V to 65V
(BOOST1-SW1), (BOOST2-SW2) ................ –0.3V to 6V
RUN1, RUN2 ............................................... –0.3V to 8V
SENSE1
SENSE2
PLLIN/MODE, FREQ Voltages .............. –0.3V to INTV
I
EXTV
ITH1, ITH2, V
PGOOD1, PGOOD2 Voltages ....................... –0.3V to 6V
TRACK/SS1, TRACK/SS2 Voltages .............. –0.3V to 6V
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
LTC3890EUH#PBF
LTC3890IUH#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:
junction temperature range, otherwise specifi cations are at T
SYMBOL
V
V
I
V
2
FB1,2
LIM
IN
FB1,2
REFLNREG
BOOST1, BOOST2 ................................ –0.3V to 71V
Maximum Current Sourced into Pin from
Source > 8V .....................................................100μA
, PHASMD Voltages ....................... –0.3V to INTV
CC
+
–
...................................................... –0.3V to 14V
, SENSE2
Voltages ...................................... –0.3V to 28V
PARAMETER
Input Supply Operating Voltage Range
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
FB1
, V
+
FB2
, SENSE1
TAPE AND REEL
LTC3890EUH#TRPBF
LTC3890IUH#TRPBF
Voltages ................... –0.3V to 6V
IN
) ......................... –0.3V to 65V
–
http://www.linear.com/leadfree/
PART MARKING*
3890
3890
CONDITIONS
(Note 4) I
–40°C to 125°C
–40°C to 85°C
(Note 4)
(Note 4) V
http://www.linear.com/tapeandreel/
TH1,2
IN
The
= 4.5V to 60V
J
CC
CC
= 25°C. V
Voltage = 1.2V
l
denotes the specifi cations 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
PHASMD
SENSE1
EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
CLKOUT
SGND
RUN1,2
RUN1
RUN2
FREQ
–
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
l
= 125°C, θ
UH PACKAGE
TOP VIEW
CC
SGND
0.788
0.792
MIN
33
= 0V unless otherwise noted.
4
JA
= 34°C/W
0.800
0.800
0.002
TYP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
±5
24
23
22
21
20
19
18
17
BOOST1
BG1
V
PGND
EXTV
INTV
BG2
BOOST2
0.812
0.808
IN
MAX
0.02
±50
60
CC
CC
UNITS
3890f
%/V
nA
V
V
V
V