description
The LTC3829 is a high performance, three phase, single output, synchronous step-down DC/DC switching controller for driving all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture provides a phase lockable frequency of up to 770kHz. By operating the three controller output stages out of phase, power loss and noise due to the ESR of the input capacitor are minimized.
The LTC3829 is configurable for 6-phase operation with DCR temperature compensation and output foldback current limiting. The device features a precision 0.6V reference and a power good indicator.
Optimize efficiency at light loads by choosing to use output progressive decrement or burst mode operation. At the point of load, a differential amplifier provides true output voltage remote sampling.
The LTC3829 is available in a low profile 38-lead 5mm x 7mm QFN package and a bare pad FE package.
Characteristics
Optional nonlinear control for fast response ±0.75%, 0.6V reference accuracy
PWM, Stage SheddingTM or Burst Mode? Operational efficiency: up to 95%
RSENSE or DCR current sense programmable DCR temperature compensated phase-lockable fixed frequency: 250kHz to 770kHz
True Remote Sampling Differential Amplifier Programmable Active Voltage Positioning (AVP)
Triple N-Channel MOSFET Synchronous Drive Wide VIN Range: 4.5V to 38V Operation
VOUT range: 0.6V to 5V (differential amplifier not used)
VOUT range: 0.6V to 3.3V (with differential amplifier)
Clock input and output adjustable soft start or VOUT tracking for 6-phase operation
38-pin (5mm x 7mm) QFN package and FE package
application
Laptop and palmtop telecommunication system portable instrument
DC power distribution system
LTC3829 Typical Application Circuit
See the PDF document data sheet for more details!
1.27mm Ejector Header Connector
Shenzhen CGE Electronics Co.,Ltd , https://www.cgeconnector.com