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Analog Devices LT8311HFE#PBF

LT8311HFE#PBF MOSFET Driver, Secondary-Side Controller

MPNLT8311HFE#PBF
End of Life

Analog Devices LT8311HFE#PBF, Secondary-Side Controller, synchronous MOSFET driver, 3.7V to 30V supply, 4.5 mA supply current, -40°C to 150°C, 20-TSSOP-EP exposed pad, Tube.

$10.5Ref. price · indicative, final on quote
Packaging20-TSSOP (0.173", 4.40mm Width), 16 Leads, Exposed Pad
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LT8311HFE#PBF specifications
ParameterValue
MountingSurface Mount
Voltage3.7V ~ 30V
Current - supply4.5 mA
Operating temperature-40°C ~ 150°C
PackageTube
ApplicationsSecondary-Side Controller
Case20-TSSOP (0.173\", 4.40mm Width), 16 Leads, Exposed Pad

Product details

Synchronous MOSFET driver for secondary-side control

The LT8311HFE#PBF is a synchronous MOSFET driver configured as a Secondary-Side Controller, designed to drive the synchronous rectifier MOSFET on the output side of an isolated power converter.

150°C junction — H-grade thermal headroom

The H-grade suffix in LT8311HFE#PBF denotes the -40°C to 150°C operating temperature range.

Supply range and bias current

The 3.7V to 30V supply range covers the common secondary-side bias voltages from 5V to 24V rails. The 4.5 mA supply current is the quiescent draw of the controller itself — the total load on the bias rail includes the gate charge of the external MOSFETs, which depends on switching frequency and MOSFET input capacitance. This low bias current makes the LT8311HFE#PBF suitable for self-powered secondary-side circuits where the bias is derived from the output or an auxiliary winding.

The LT8311HFE#PBF is supplied in a 20-TSSOP package with exposed pad (20-TSSOP-EP), 0.173-inch body width, 4.40 mm nominal width, 16 leads plus the exposed pad.

It is ROHS3 compliant.

Frequently asked questions

What are the direct alternatives or equivalents for LT8311HFE#PBF?

The LT8311MPFE#PBF is the military-temperature variant rated -55°C to 150°C. The LT8310HFE#PBF is a different device — a Forward Converter Controller with a 6.0V minimum supply and 3.8 mA supply current, not a direct pin-compatible substitute.