LTC3875_15 Datasheet, PDF (2/44 Pages) Linear Technology – Dual, 2-Phase, Synchronous Controller with Low Value DCR Sensing and Temperature Compensation

LTC3875
Absolute Maximum Ratings
(Note 1)
Input Supply Voltage (V_IN).......................... 40V to –0.3V
Topside Driver Voltages
(BOOST1, BOOST2).................................... 46V to –0.3V
Switch Voltage (SW1, SW2)........................... 40V to –5V
INTV_CC, RUN(s), PGOOD, EXTV_CC
(BOOST-SW1), (BOOST2-SW2).................... 6V to –0.3V
SNSA⁺(s), SNSD⁺(s),
SNS^–(s) Voltages................................... INTV_CC to –0.3V
MODE/PLLIN, ILIM, FREQ, IFAST, ENTMPB
V_OSNS(s)+, V_{OSNS(s)–} Voltages................ INTV_CC to –0.3V
I_TH1, I_TH2, PHASMD, TRSET1, TRSET2,
TCOMP1, TCOMP2, TAVG Voltages........ INTV_CC to –0.3V
INTV_CC Peak Output Current.................................100mA
Operating Junction Temperature Range
(Notes 2, 3)............................................. –40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
Pin Configuration
TOP VIEW
40 39 38 37 36 35 34 33 32 31
TK/SS1 1
V_OSNS1+ 2
V_OSNS1– 3
I_TH1 4
I_TH2 5
V_OSNS2+ 6
V_OSNS2– 7
TK/SS2 8
SNSA2⁺ 9
SNS2^– 10
41
SGND/PGND
30 SW1
29 TG1
28 BOOST1
27 BG1
26 V_IN
25 INTV_CC
24 EXTV_CC
23 BG2
22 BOOST2
21 TG2
11 12 13 14 15 16 17 18 19 20
UJ PACKAGE
40-LEAD (6mm × 6mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 33°C/W, θ_JC = 2.0°C/W
EXPOSED PAD (PIN 41) IS SGND/PGND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3875EUJ#PBF
LTC3875EUJ#TRPBF
LTC3875
40-Lead (6mm × 6mm) Plastic QFN
LTC3875IUJ#PBF
LTC3875IUJ#TRPBF
LTC3875
40-Lead (6mm × 6mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard 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/
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T_A = 25°C (Note 2). V_IN = 15V, V_RUN1,2 = 5V unless otherwise noted.
SYMBOL
PARAMETER
Main Control Loops
V_IN
Input Voltage Range
V_OUT
Output Voltage Range
V_OSNS1,2+
I_OSNS1,2+
V_REFLNREG
Regulated V_OUT Feedback Voltage
Including Diffamp Error
Feedback Current
Reference Voltage Line Regulation
CONDITIONS
SNSD⁺
SNSD⁺
Pin
Pin
to
to
V_OUT
GND
(Note 4); I_TH1,2 Voltage = 1.2V, –40°C to 85°C
(Note 4); I_TH1,2 Voltage = 1.2V,–40°C to 125°C
(Note 4)
V_IN = 4.5V to 38V (Note 4)
MIN TYP MAX UNITS
4.5
38
V
0.6
3.5
V
0.6
5
V
0.597 0.600 0.603
V
l 0.5965 0.600 0.6045
V
–30 –100
nA
0.002 0.005 %/V
3875fa
2
For more information www.linear.com/LTC3875