LTC3788_15 Datasheet, PDF (2/32 Pages) Linear Technology – 2-Phase, Dual Output Synchronous Boost Controller

LTC3788
Absolute Maximum Ratings
(Notes 1, 3)
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, PGOOD2, 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
I_LIM, SS1, SS2, ITH1, ITH2, FREQ,
PHASMD, VFB1, VFB2............................–0.3V to INTV_CC
Operating Junction Temperature Range.....–40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
Pin Configuration
TOP VIEW
32 31 30 29 28 27 26 25
SENSE1^– 1
24 BOOST1
FREQ 2
23 BG1
PHASMD 3
CLKOUT 4
PLLIN/MODE 5
SGND 6
RUN1 7
RUN2 8
22 VBIAS
33
21 PGND
GND
20 EXTV_CC
19 INTV_CC
18 BG2
17 BOOST2
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 34°C/W
EXPOSED PAD (PIN 33) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3788EUH#PBF
LTC3788EUH#TRPBF
3788
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3788IUH#PBF
LTC3788IUH#TRPBF
3788
32-Lead (5mm × 5mm) Plastic QFN
–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.
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 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
V_{FB1, 2}
I_{FB1, 2}
V_REFLNREG
Regulated Feedback Voltage
Feedback Current
Reference Line Voltage Regulation
I_TH = 1.2V (Note 4)
(Note 4)
VBIAS = 6V to 38V
l 1.188 1.200 1.212
V
±5
±50
nA
0.002 0.02
%/V
3788fc
2