LTC7878中文資料亞德諾數(shù)據手冊PDF規(guī)格書

FEATURES

? Built-In Multiphase Current Sharing

? 18μA Pass-Thru Mode IQ with 99.9 Efficiency

? Pass-Thru or Fixed Output CCM, DCM Operation

? Programmable Non-Switching Pass-Thru Window

? VIN Range: 2.8V to 100V (4.5V for Start-Up)

? VOUT Range: 1V to 100V

? Reverse Input Protection to -40V

? ±2 Output Voltage Accuracy (–40°C to 125°C)

? Programmable Current Limit

? 10V Quad N-Channel MOSFET Gate Drivers

? ±20 Cycle-by-Cycle Inductor Current Limit

? No Top MOSFET Refresh Noise in Buck or Boost

? Fixed/Phase-Lockable Frequency: 80kHz to 400kHz

? Spread-Spectrum Frequency Modulation for Low EMI

? Power Good Output Voltage/Overcurrent Monitor

? Available in a 40-Lead (6mm x 6mm) QFN Package

APPLICATIONS

? Industrial, Telecom, Avionics Systems, Automotive

Qualification in Progress

GENERAL DESCRIPTION

The LT?8210-1 is a 4-switch synchronous buck-boost

DC/DC controller that can operate in pass-thru mode,

forced continuous conduction, or pulse-skipping mode.

Pass-Thru is a feature that passes the input directly to

the output when the input is within a user

programmable window. Pass-Thru mode eliminates

switching losses and EMI while maximizing efficiency.

For input voltages above or below the pass-thru

window, the buck or boost regulation loops maintain

the output at the set maximum or minimum values,

respectively. The LT8210-1 is pin compatible with the

LT8210. The IMON pin on the LT8210-1 has an ISHARE

function, which allows for masterless current sharing.

Multiple LT8210-1 can be connected in parallel for

higher output current and reduced voltage ripple. A

masterless closed loop current sharing loop balances

the current per phase and allows phase shedding.

Optional reverse input protection down to -40V can be

implemented with the addition of a single N-channel

MOSFET. The LT8210-1 includes a precision current

sense amplifier that can accurately monitor and limit

output or input average current.