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LTC3857EUH#TRPBF
Linear Technology/Analog DevicesRoHS 
RoHS compliant
RoHS compliantPackage 32-WFQFN Exposed Pad
Category PMIC - Voltage Regulators - DC DC Switching Controllers / PMIC - Voltage Regulators - DC DC Switching Controllers
Description
LTC3857 Buck Tape & Reel (TR) PolyPhase? DC to DC switching controller 5mm 24V 105kHz~835kHz 350kHz~535kHz -40C~125C TJ
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Inventory: 3245
Minimum: 1
Total Price: USD $28.75
Unit Price: USD $28.75251
≥1 USD $28.75251
≥200 USD $11.12814
≥500 USD $10.736896
≥1000 USD $10.542587
Technical Details
Physical
Mounting Type Surface Mount
Package / Case 32-WFQFN Exposed Pad
Surface Mount YES
Number of Pins 32
Dimensions
Height Seated (Max) 0.8mm
Length 5mm
Width 5mm
Technical
Operating Temperature -40°C~125°C TJ
Packaging Tape & Reel (TR)
Published 2012
Series PolyPhase?
JESD-609 Code e3
Part Status Active
Moisture Sensitivity Level (MSL) 1 (Unlimited)
Number of Terminations 32
ECCN Code EAR99
Terminal Finish Matte Tin (Sn)
Subcategory Switching Regulator or Controllers
Technology CMOS
Terminal Position QUAD
Peak Reflow Temperature (Cel) 260
Terminal Pitch 0.5mm
Base Part Number LTC3857
Function Step-Down
Number of Outputs 2
Output Voltage 24V
Output Type Transistor Driver
Input Voltage-Nom 12V
Number of Channels 1
Analog IC - Other Type DUAL SWITCHING CONTROLLER
Output Configuration Positive
Voltage - Supply (Vcc/Vdd) 4V~38V
Control Features Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start, Tracking
Input Voltage (Min) 4V
Topology Buck
Control Mode CURRENT-MODE
Frequency - Switching 105kHz~835kHz 350kHz~535kHz
Input Voltage (Max) 38V
Control Technique PULSE WIDTH MODULATION
Synchronous Rectifier Yes
Switcher Configuration PHASE-SHIFT
Max Frequency 850kHz
Duty Cycle (Max) 99.4%
Clock Sync No
Compliance
RoHS Status ROHS3 Compliant
Lead Free Lead Free
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