LTC3827EG-1#PBF

Product Summary

The LTC3827-1 is a high performance dual step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 650kHz. Power loss and noise due to the ESR of the input capacitor ESR are minimized by operating the two controller output stages out of phase.

The 80μA no-load quiescent current extends operating life in battery powered systems. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3827-1 features a precision 0.8V reference and a power good output indicator. A wide 4V to 36V input supply range encompasses all battery chemistries.

Independent TRACK/SS pins for each controller ramp the output voltage during startup. Current foldback limits MOSFET heat dissipation during short-circuit conditions.

The PLLIN/MODE pin selects among Burst Mode operation, pulse skipping mode, or continuous inductor current mode at light loads. For a leadless package version (5mm x 5mm QFN) with additional features, see the LTC3827 datasheet.



Among them if you have any need quote or problem, please could you tell us.
E-mail: abel.huang911@gamil.com
MSN:abel.huang@hotmail.com

Features

Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V
Low Operating IQ: 80μA (One Channel On)
Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
OPTI-LOOP? Compensation Minimizes COUT
±1% Output Voltage Accuracy
Wide VIN Range: 4V to 36V Operation
Phase-Lockable Fixed Frequency 140kHz to 650kHz
Selectable Continuous, Pulse Skipping or Low Ripple Burst Mode? Operation at Light Loads
Dual N-Channel MOSFET Synchronous Drive
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Output Voltage Soft-Start or Tracking
Output Current Foldback Limiting
Power Good Output Voltage Monitor
Output Overvoltage Protection
Low Shutdown IQ: 8μA
Internal LDO Powers Gate Drive from VIN or VOUT
Small 28-Lead SSOP Package