LTC7878中文资料亚德诺数据手册PDF规格书

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.