LTC4278

42

4278fc

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417



LINEAR TECHNOLOGY CORPORATION 2009

LT 0412 REV C • PRINTED IN USA

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

Single Switch Synchronous Forward Counter

Synchronous Controller, Programmable Volt-Sec Clamp, Low Start Current

LTC3803-3

300kHz Constant-Frequency, Adjustable Slope Compensation, Optimized

for High Input Voltage Applications

LTC3805

Adjustable Frequency Current Mode Flyback Controller Slope Comp, Overcurrent Protect, Internal/External Clock

LTC3825

Isolated No-Opto Synchronous Flyback Controller with

Wide Input Supply Range

Adjustable Switching Frequency, Programmable Undervoltage Lockout,

Accurate Regulation without Trim, Synchronous for High Efficiency

LTC4257-1

IEEE 802.3af PD Interface Controller

100V 400mA Internal Switch, Programmable Classification, Dual

Current Limit

LTC4258

Quad IEEE 802.3af Power over Ethernet Controller

DC Disconnect Only, IEEE-Compliant PD Detection and Classification,

LTC4259A-1

Quad IEEE 802.3af Power over Ethernet Controller

AC or DC Disconnect, IEEE-Compliant PD Detection and Classification,

Autonomous Operation

LTC4263

Single IEEE 802.3af Power over Ethernet Controller

AC or DC Disconnect, IEEE-Compliant PD Detection and Classification,

LTC4263-1

High Power Single PSE Controller

Internal Switch, Autonomous Operation, 30W

LTC4264

High Power PD Interface Controller with 750mA

Current Limit

750mA Internal Switch, Programmable Classification Current to 75mA,

Precision Dual Current Limit with Disable.

LTC4265

IEEE 802.3at High Power PD Interface Controller with

2-Event Classification

2-Event Classification Recognition, 100mA Inrush Current, Single-Class

Programming Resistor, Full Compliance to 802.3at

LTC4266

IEEE 802.3at Quad PSE Controller

Supports IEEE 802.3at Type 1 and Type 2 PDs, 0.34Ω Channel Resistance,

Advanced Power Management, High Reliability 4-Point PD Detection,

Legacy Capacitance Detect

LTC4267-1

IEEE 802.3af PD Interface with an Integrated

Switching Regulator

100V 400mA Internal Switch, Programmable Classification, 200kHz

Constant-Frequency PWM, Optimized for IEEE-Compliant PD System

LTC4267-3

IEEE 802.3af PD Interface with an Integrated

Switching Regulator

100V 400mA Internal Switch, Programmable Classification, 300kHz

Constant-Frequency PWM, Optimized for IEEE-Compliant PD System

LTC4269-1

IEEE 802.3af/IEEE 802.3at PD with Synchronous

No-Opto Flyback Controller

2-Event Classification Recognition, 92% Power Supply Efficiency, Flexible

Aux Support, Superior EMI

LTC4269-2

IEEE 802.3af/IEEE 802.3at PD with Synchronous

Forward Controller

2-Event Classification Recognition, 94% Power Supply Efficiency, Flexible

Aux Support, Superior EMI