LTC3546IUFD#PBF Linear Technology, LTC3546IUFD#PBF Datasheet - Page 2

• Manufacturer Part Number: LTC3546IUFD#PBF
• Description: IC BUCK SYNC ADJ 1A/2A DL 28QFN
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3546IUFD#PBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.6 ~ 5 V
• Current - Output: 1A, 2A
• Frequency - Switching: 2.25MHz, 0.75MHz ~ 4MHz
• Voltage - Input: 2.25 ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 28-QFN
• Dc To Dc Converter Type: Step Down
• Pin Count: 28
• Input Voltage: 5.5V
• Output Voltage: 0.6 to 5V
• Switching Freq: 750 TO 4000/2900KHz
• Output Current: 2A
• Efficiency: 96%
• Package Type: QFN EP
• Output Type: Adjustable
• Switching Regulator: Yes
• Load Regulation: 0.2%
• Line Regulation: 0.2%/V
• Mounting: Surface Mount
• Input Voltage (min): 2.25V
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Compliant

ABSOLUTE MAXIMUM RATINGS
LTC3546
(Note 1)
V
SYNC/MODE, SW1, SW1D, SW2A, SW2B,
RUN1, RUN2, V
I
BMC2 Voltages ................ –0.3V to (V
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH
LTC3546EUFD#PBF
LTC3546IUFD#PBF
LTC3546EFE#PBF
LTC3546IFE#PBF
LEAD BASED FINISH
LTC3546EUFD
LTC3546IUFD
LTC3546EFE
LTC3546IFE
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
2
TH1
IN1
, I
, V
TH2
IN1D
, TRACK/SS1, TRACK/SS2, BMC1,
, V
TRACK/SS2
IN2
FB1
BMC2
RUN2
, V
V
V
V
V
I
CCD
TH2
FB2
IN2
IN1
28-LEAD (4mm 5mm) PLASTIC QFN
, V
CCA
EXPOSED PAD (PIN 29) IS GNDD
T
1
2
3
4
5
6
7
8
JMAX
FB2
TAPE AND REEL
LTC3546EUFD#TRPBF
LTC3546IUFD#TRPBF
LTC3546EFE#TRPBF
LTC3546IFE#TRPBF
TAPE AND REEL
LTC3546EUFD#TR
LTC3546IUFD#TR
LTC3546EFE#TR
LTC3546IFE#TR
28 27 26 25 24
, V
9 10
= 125°C, θ
, PHASE, FREQ,
UFD PACKAGE
CCD
TOP VIEW
11 12 13
29
Voltages ......... –0.3V to 6V
JA
= 34°C/W
14
23
22
21
20
19
18
17
16
15
IN1
BMC1
TRACK/SS1
V
I
PHASE
RUN1
PGND2
PGND1
TH1
FB1
http://www.linear.com/leadfree/
or V
PART MARKING*
3546
3546
LTC3546FE
LTC3546FE
PART MARKING*
3546
3546
LTC3546FE
LTC3546FE
http://www.linear.com/tapeandreel/
IN2
) + 0.3V
Maximum Difference Between Any of
V
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
IN1
PACKAGE DESCRIPTION
28-Lead (4mm × 5mm) Plastic QFN
28-Lead (4mm × 5mm) Plastic QFN
28-Lead Plastic TSSOP
28-Lead Plastic TSSOP
PACKAGE DESCRIPTION
28-Lead (4mm × 5mm) Plastic QFN
28-Lead (4mm × 5mm) Plastic QFN
28-Lead Plastic TSSOP
28-Lead Plastic TSSOP
, V
IN1D
EXPOSED PAD (PIN 29) IS GNDD MUST BE SOLDERED TO PCB
, V
SYNC/MODE
TRACK/SS2
PGOOD2
IN2
SW2A
SW2B
BMC2
RUN2
V
V
V
V
V
V
IN1D
I
, V
CCA
CCD
TH2
FB2
IN2
IN1
T
CCA
JMAX
28-LEAD PLASTIC TSSOP
10
11
12
13
14
1
2
3
4
5
6
7
8
9
= 125°C, θ
, V
FE PACKAGE
TOP VIEW
CCD
29
JA
..................................0.3V
= 25°C/W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
GNDA
FREQ
PGOOD1
BMC1
TRACK/SS1
V
I
PHASE
RUN1
PGND2
PGND1
PGND1D
SW1
SW1D
TH1
FB1
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–40°C to 85°C
–40°C to 125°C
3546fb