Datasheet

LTC3788-1
2
37881fc
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
VBIAS ........................................................ –0.3V to 40V
BOOST1, BOOST2 ...................................... –0.3V to 76V
SW1, SW2 .................................................. –0.3V to 70V
RUN1, RUN2 ................................................ –0.3V to 8V
Maximum Current Sourced into Pin
from Source > 8V .............................................100µA
PGOOD1, PLLIN/MODE ............................... –0.3V to 6V
INTV
CC
, (BOOST1-SW1, BOOST2-SW2) ...... –0.3V to 6V
EXTV
CC
........................................................ –0.3V to 6V
SENSE1
+
, SENSE1
–
,
SENSE2
+
, SENSE2
–
.................................... –0.3V to 40V
SENSE1
+
– SENSE1
–
,
SENSE2
+
– SENSE2
–
................................. –0.3V to 0.3V
SS1, SS2, ITH1, ITH2, FREQ,
VFB1, VFB2 ...........................................–0.3V to INTV
CC
Operating Junction Temperature Range ....–40°C to 125°C
Storage Temperature Range .................. –65°C to 125°C
Lead Temperature (Soldering, 10 seconds) ...........300°C
(Notes 1, 3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
GN PACKAGE
28-LEAD PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ITH1
VFB1
SENSE1
+
SENSE1
–
FREQ
PLLIN/MODE
SGND
RUN1
RUN2
SENSE2
–
SENSE2
+
VFB2
ITH2
SS2
SS1
PGOOD1
SW1
TG1
BOOST1
BG1
VBIAS
PGND
EXTV
CC
INTV
CC
BG2
BOOST2
TG2
SW2
T
JMAX
= 125°C, θ
JA
= 80°C/W
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3788EGN-1#PBF LTC3788EGN-1#TRPBF LTC3788GN-1 28-Lead Plastic SSOP –40°C to 125°C
LTC3788IGN-1#PBF LTC3788IGN-1#TRPBF LTC3788GN-1 28-Lead Plastic SSOP –40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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 PARAMETER CONDITIONS MIN TYP MAX UNITS
Main Control Loop
VBIAS Chip Bias Voltage Operating Range 4.5 38 V
VFB1,2 Regulated Feedback Voltage I
TH
= 1.2V (Note 4)
l
1.188 1.200 1.212 V
IFB1,2 Feedback Current (Note 4) ±5 ±50 nA
V
REFLNREG
Reference Line Voltage Regulation V
IN
= 6V to 38V 0.002 0.02 %/V
The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C, VBIAS = 12V, unless otherwise noted (Note 2).