LT3477EUF#TRPBF Linear Technology, LT3477EUF#TRPBF Datasheet - Page 19

• Manufacturer Part Number: LT3477EUF#TRPBF
• Description: IC LED DRVR HP CONST CURR 20-QFN
• Manufacturer: Linear Technology
• Type: High Power, Constant Currentr

Specifications of LT3477EUF#TRPBF

• Constant Current: Yes
• Constant Voltage: Yes
• Topology: Flyback, PWM, SEPIC, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: General Purpose
• Type - Secondary: White LED
• Frequency: 200kHz ~ 3.5MHz
• Voltage - Supply: 2.5 V ~ 25 V
• Mounting Type: Surface Mount
• Package / Case: 20-QFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 3A
• Internal Switch(s): Yes
• Efficiency: 93%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -

PACKAGE DESCRIPTION
6.60 ±0.10
(.0035 – .0079)
0.09 – 0.20
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
4.50 ±0.10
RECOMMENDED SOLDER PAD LAYOUT
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
(.169 – .177)
4.30 – 4.50*
(.020 – .030)
0.50 – 0.75
SEE NOTE 4
(.152)
MILLIMETERS
3.86
(INCHES)
0.65 BSC
0.45 ±0.05
20-Lead Plastic TSSOP (4.4mm)
(Reference LTC DWG # 05-08-1663)
(.108)
0.25
REF
2.74
Exposed Pad Variation CB
1.05 ±0.10
0° – 8°
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
4. RECOMMENDED MINIMUM PCB METAL SIZE
SHALL NOT EXCEED 0.150mm (.006") PER SIDE
FOR EXPOSED PAD ATTACHMENT
FE Package
(.0256)
0.65
BSC
20 1918 17 16 15
1
(.0077 – .0118)
0.195 – 0.30
2
TYP
3 4 5 6 7 8 9 10
(.252 – .260)
6.40 – 6.60*
(.152)
3.86
14 13
12
11
FE20 (CB) TSSOP 0204
(.002 – .006)
0.05 – 0.15
(.108)
(.047)
2.74
MAX
1.20
(.252)
6.40
BSC
LT3477
19
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