LTC3868-1 Datasheet, PDF (2/38 Pages) Linear Technology – Low IQ, Dual 2-Phase Synchronous Step-Down Controller

LTC3868-1
Absolute Maximum Ratings (Note 1)
Input Supply Voltage (V_IN).......................... –0.3V to 28V
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⁺, SENSE1^–
SENSE2^– Voltages...................................... –0.3V to 16V
PLLIN/MODE, FREQ Voltages ............... –0.3V to INTV_CC
EXTV_CC ...................................................... –0.3V to 14V
I_TH1, I_TH2, V_FB1, V_FB2 Voltages...................... –0.3V to 6V
PGOOD1 Voltage ......................................... –0.3V to 6V
SS1, SS2, INTV_CC Voltages .......................... –0.3V to 6V
Operating Temperature Range (Note 2).... –40°C to 85°C
Junction Temperature (Note 3).............................. 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
SSOP................................................................. 300°C
Pin Configuration
TOP VIEW
28 27 26 25 24 23
SENSE1⁺ 1
22 BOOST1
SENSE1^– 2
21 BG1
FREQ 3
PLLIN/MODE 4
SGND 5
RUN1 6
RUN2 7
SENSE2^– 8
29
SGND
20 V_IN
19 PGND
18 EXTV_CC
17 INTV_CC
16 BG2
15 BOOST2
9 10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm s 5mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 43°C/W
EXPOSED PAD (PIN 29) IS SGND, MUST BE SOLDERED TO PCB
I_TH1 1
V_FB1 2
SENSE1⁺ 3
SENSE1^– 4
FREQ 5
PLLIN/MODE 6
SGND 7
RUN1 8
RUN2 9
SENSE2^– 10
SENSE2⁺ 11
V_FB2 12
I_TH2 13
SS2 14
TOP VIEW
28 SS1
27 PGOOD1
26 TG1
25 SW1
24 BOOST1
23 BG1
22 V_IN
21 PGND
20 EXTV_CC
19 INTV_CC
18 BG2
17 BOOST2
16 SW2
15 TG2
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
LTC3868EUFD-1#PBF LTC3868EUFD-1#TRPBF 38681
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC3868IUFD-1#PBF
LTC3868IUFD-1#TRPBF 38681
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC3868EGN-1#PBF
LTC3868EGN-1#TRPBF LTC3868GN-1
28-Lead Plastic SSOP
–40°C to 85°C
LTC3868IGN-1#PBF
LTC3868IGN-1#TRPBF LTC3868GN-1
28-Lead Plastic SSOP
–40°C to 85°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/
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