LTC3868 Linear Technology, LTC3868 Datasheet - Page 2

• Manufacturer Part Number: LTC3868
• Description: Low IQ Dual 2-Phase Synchronous Step-Down Controller
• Manufacturer: Linear Technology

absoluTe MaxiMuM raTings
LTC3868
(Note 1)
Input Supply Voltage (V
Topside Driver Voltages
BOOST1, BOOST2 . ................................ –0.3V to 34V
Switch Voltage (SW1, SW2) ........................ –5V to 28V
(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 Temperature Range (Note 2) ... –40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range . .................. –65°C to 150°C
orDer inForMaTion
LEAD FREE FINISH
LTC3868EUH#PBF
LTC3868IUH#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
V

temperature range, otherwise specifications are at T
FB1,2
LIM
TH1
IN
FB1,2
REFLNREG
LOADREG
, PHASMD Voltages ....................... –0.3V to INTV
, I
CC
TH2
. ..................................................... –0.3V to 14V
+
–
, SENSE2
Voltages . ..................................... –0.3V to 16V
,V
FB1
PARAMETER
Input Supply Operating Voltage Range
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
, V
CC
FB2
Voltages ......................... –0.3V to 6V
+
, SENSE1
Voltages ...................... –0.3V to 6V
TAPE AND REEL
LTC3868EUH#TRPBF
LTC3868IUH#TRPBF
IN
) ......................... –0.3V to 28V
–
PART MARKING*
3868
3868
CONDITIONS
(Note 4) I
(Note 4)
(Note 4) V
(Note4)
Measured in Servo Loop,
∆I
(Note4)
Measured in Servo Loop,
∆I
A
TH
TH
= 25°C. V
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 2V
The
TH1,2
IN
= 4.5V to 24V
CC
CC
l
IN
Voltage = 1.2V
denotes the specifications which apply over the full operating
= 12V, V
pin conFiguraTion
PACKAGE DESCRIPTION
32-Lead (5mm × 5mm) Plastic QFN
32-Lead (5mm × 5mm) Plastic QFN
RUN1,2
PLLIN/MODE
SENSE1
PHASMD
EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
CLKOUT
= 5V, EXTV
SGND
RUN1
RUN2
FREQ
–
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
CC
T
JMAX
= 0V unless otherwise noted.
= 125°C, θ
l
l
l
UH PACKAGE
TOP VIEW
SGND
33
0.788
MIN
JA
4
= 34°C/W
www.DataSheet4U.com
0.002
–0.01
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
TYP
0.01
0.8
±5
24
23
22
21
20
19
18
17
BOOST1
BG1
V
PGND
EXTV
INTV
BG2
BOOST2
IN
0.812
MAX
0.02
–0.1
±50
0.1
24
CC
CC
UNITS
3868fb
%/V
nA
%
%
V
V