Datasheet

LTC3546
2
3546fc
For more information www.linear.com/3546
absoluTe MaxiMuM raTings
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
(Note 1)
9 10
TOP VIEW
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
BMC2
TRACK/SS2
V
FB2
I
TH2
V
CCD
RUN2
V
IN2
V
IN1
BMC1
TRACK/SS1
V
FB1
I
TH1
PHASE
RUN1
PGND2
PGND1
PGOOD2 SYNC/MODE V
CCA
GNDA FREQ PGOOD1
V
IN1D
SW2A SW2B
SW1D
SW1
PGND1D
7
17
18
19
20
29
21
22
16
8
15
T
JMAX
= 125°C, θ
JA
= 34°C/W
EXPOSED PAD (PIN 29) IS GNDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
FE PACKAGE
28-LEAD PLASTIC TSSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CCA
SYNC/MODE
PGOOD2
BMC2
TRACK/SS2
V
FB2
I
TH2
V
CCD
RUN2
V
IN2
V
IN1
V
IN1D
SW2A
SW2B
GNDA
FREQ
PGOOD1
BMC1
TRACK/SS1
V
FB1
I
TH1
PHASE
RUN1
PGND2
PGND1
PGND1D
SW1
SW1D
29
T
JMAX
= 125°C, θ
JA
= 25°C/W
EXPOSED PAD (PIN 29) IS GNDD MUST BE SOLDERED TO PCB
pin conFiguraTion
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/
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