LTC3850EUFD#PBF Linear Technology, LTC3850EUFD#PBF Datasheet - Page 35

• Manufacturer Part Number: LTC3850EUFD#PBF
• Description: IC CNTRLR STP DWN SYNC 28-QFN
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3850EUFD#PBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 23.3 V
• Current - Output: 100mA
• Frequency - Switching: 250kHz ~ 780kHz
• Voltage - Input: 4 ~ 24 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

4.50 ± 0.05
3.10 ± 0.05
2.64 ± 0.05
(4 SIDES)
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
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
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE, IF PRESENT
ON THE TOP AND BOTTOM OF PACKAGE
PIN 1
TOP MARK
(NOTE 6)
4.00 ± 0.10
(4 SIDES)
(Reference LTC DWG # 05-08-1721 Rev A)
0.40 BSC
28-Lead Plastic QFN (4mm × 4mm)
0.20 ±0.05
0.70 ±0.05
0.200 REF
0.00 – 0.05
PACKAGE
OUTLINE
0.75 ± 0.05
UF Package
2.64 ± 0.10
(4-SIDES)
R = 0.05
TYP
LTC3850/LTC3850-1
R = 0.115
BOTTOM VIEW—EXPOSED PAD
TYP
27
28
0.40 BSC
0.20 ± 0.05
1
2
(UF28) QFN 0106 REVA
0.40 ± 0.05
PIN 1 NOTCH
R = 0.20 TYP
OR 0.35 × 45°
CHAMFER
35
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