LTC3546_15 Datasheet, PDF (2/30 Pages) Linear Technology – Dual Synchronous, 3A/1A or 2A/2A Configurable Step-Down DC/DC Regulator

LTC3546
Absolute Maximum Ratings
(Note 1)
V_IN1, V_IN1D, V_IN2, V_CCA, V_CCD Voltages.......... –0.3V to 6V
SYNC/MODE, SW1, SW1D, SW2A, SW2B,
RUN1, RUN2, V_FB1, V_FB2, PHASE, FREQ,
I_TH1, I_TH2, TRACK/SS1, TRACK/SS2, BMC1,
BMC2 Voltages................. –0.3V to (V_IN1 or V_IN2) + 0.3V
Maximum Difference Between Any of
V_IN1, V_IN1D, V_IN2, V_CCA, V_CCD ...................................0.3V
PGOOD1, PGOOD2 Voltage........................... –0.3V to 6V
Operating Junction Temperature Range
(Notes 2, 6, 7)......................................... –40°C to 125°C
Storage Temperature Range.................... –65°C to 125°C
Pin Configuration
TOP VIEW
28 27 26 25 24 23
BMC2 1
22 BMC1
TRACK/SS2 2
21 TRACK/SS1
V_FB2 3
I_TH2 4
V_CCD 5
RUN2 6
20 V_FB1
29
19 I_TH1
18 PHASE
17 RUN1
V_IN2 7
16 PGND2
V_IN1 8
15 PGND1
9 10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 34°C/W
EXPOSED PAD (PIN 29) IS GNDD
TOP VIEW
V_CCA 1
SYNC/MODE 2
28 GNDA
27 FREQ
PGOOD2 3
26 PGOOD1
BMC2 4
25 BMC1
TRACK/SS2 5
24 TRACK/SS1
V_FB2 6
23 V_FB1
I_TH2 7
29
22 I_TH1
V_CCD 8
21 PHASE
RUN2 9
20 RUN1
V_IN2 10
V_IN1 11
V_IN1D 12
SW2A 13
19 PGND2
18 PGND1
17 PGND1D
16 SW1
SW2B 14
15 SW1D
FE PACKAGE
28-LEAD PLASTIC TSSOP
T_JMAX = 125°C, θ_JA = 25°C/W
EXPOSED PAD (PIN 29) IS GNDD MUST BE SOLDERED TO PCB
order information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3546EUFD#PBF
LTC3546EUFD#TRPBF 3546
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC3546IUFD#PBF
LTC3546IUFD#TRPBF 3546
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3546EFE#PBF
LTC3546EFE#TRPBF
LTC3546FE
28-Lead Plastic TSSOP
–40°C to 85°C
LTC3546IFE#PBF
LTC3546IFE#TRPBF
LTC3546FE
28-Lead Plastic TSSOP
–40°C to 125°C
LEAD BASED FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3546EUFD
LTC3546EUFD#TR
3546
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC3546IUFD
LTC3546IUFD#TR
3546
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3546EFE
LTC3546EFE#TR
LTC3546FE
28-Lead Plastic TSSOP
–40°C to 85°C
LTC3546IFE
LTC3546IFE#TR
LTC3546FE
28-Lead Plastic TSSOP
–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/
3546fc
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For more information www.linear.com/3546