LTC3546IUFD#PBF Linear Technology, LTC3546IUFD#PBF Datasheet - Page 27

• 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

PACKAGE DESCRIPTION
6.60 ±0.10
4.50 ±0.10
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
RECOMMENDED SOLDER PAD LAYOUT
(.0035 – .0079)
0.09 – 0.20
SEE NOTE 4
(.187)
MILLIMETERS
4.75
(INCHES)
(.169 – .177)
4.30 – 4.50*
(.020 – .030)
0.50 – 0.75
0.65 BSC
0.45 ±0.05
28-Lead Plastic TSSOP (4.4mm)
(Reference LTC DWG # 05-08-1663)
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
(.108)
4. RECOMMENDED MINIMUM PCB METAL SIZE
2.74
SHALL NOT EXCEED 0.150mm (.006") PER SIDE
FOR EXPOSED PAD ATTACHMENT
1.05 ±0.10
Exposed Pad Variation EB
0.25
REF
0° – 8°
PAD HEAT SINK
ON BOTTOM OF
FE Package
EXPOSED
PACKAGE
(.0256)
0.65
BSC
28 2726 25 24 23
1
(.0077 – .0118)
0.195 – 0.30
2
TYP
3 4 5 6 7 8 9 10 11 12 13 14
(.378 – .386)
9.60 – 9.80*
(.187)
22 21
4.75
20
19
18 17
16
15
(.002 – .006)
0.05 – 0.15
FE28 (EB) TSSOP 0204
LTC3546
(.047)
(.108)
1.20
MAX
2.74
(.252)
6.40
BSC
27
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