LTC3788-1 Datasheet, PDF (2/28 Pages) Linear Technology – 2-Phase, Dual Output Synchronous Boost Controller

LTC3788-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
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
PIN CONFIGURATION
TOP VIEW
ITH1 1
VFB1 2
SENSE1⁺ 3
SENSE1^– 4
FREQ 5
PLLIN/MODE 6
SGND 7
RUN1 8
RUN2 9
SENSE2^– 10
SENSE2⁺ 11
VFB2 12
ITH2 13
SS2 14
28 SS1
27 PGOOD1
26 SW1
25 TG1
24 BOOST1
23 BG1
22 VBIAS
21 PGND
20 EXTV_CC
19 INTV_CC
18 BG2
17 BOOST2
16 TG2
15 SW2
GN PACKAGE
28-LEAD PLASTIC SSOP
T_JMAX = 125°C, θ_JA = 90°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 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).
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Main Control Loop
VBIAS
Chip Bias Voltage Operating Range
4.5
38
V
VFB1, 2
IFB1, 2
Regulated Feedback Voltage
Feedback Current
I_TH = 1.2V (Note 4)
(Note 4)
l 1.188 1.200 1.212
V
±5
±50
nA
V_REFLNREG
Reference Line Voltage Regulation
V_IN = 6V to 38V
0.002 0.02
%/V
37881f
2