LT3477EUF#TRPBF Linear Technology, LT3477EUF#TRPBF Datasheet - Page 18

• 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: -

LT3477
PACKAGE DESCRIPTION
18
4.50 ± 0.05
3.10 ± 0.05
2.45 ± 0.05
(4 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
NOTE:
1. DRAWING IS PROPOSED TO BE MADE A JEDEC PACKAGE OUTLINE MO-220
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
VARIATION (WGGD-1)—TO BE APPROVED
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
ON THE TOP AND BOTTOM OF PACKAGE
PIN 1
TOP MARK
(NOTE 6)
4.00 ± 0.10
(4 SIDES)
20-Lead Plastic QFN (4mm
(Reference LTC DWG # 05-08-1710)
0.50 BSC
0.25 ±0.05
0.70 ±0.05
PACKAGE
OUTLINE
UF Package
0.75 ± 0.05
0.200 REF
0.00 – 0.05
×
2.45 ± 0.10
(4-SIDES)
4mm)
R = 0.115
BOTTOM VIEW—EXPOSED PAD
TYP
19
20
0.50 BSC
0.25 ± 0.05
0.38 ± 0.10
1
2
(UF20) QFN 10-04
PIN 1 NOTCH
R = 0.30 TYP
3477fc