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LTC®3788-1 Boost Controller


Linear Technology's LTC3788-1 is a high performance 2-phase dual synchronous boost converter controller


LTC3788-1 Boost ControllerLinear Technology's LTC3788-1 is a high performance 2-phase dual synchronous boost converter controller that drives all N-channel power MOSFETs. Synchronous rectification increases efficiency, reduces power losses, and eases thermal requirements, allowing the LTC3788-1 to be used in high power boost applications.

A constant-frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3788-1 features a precision 1.2V reference and a power good output indicator. A 4.5V to 38V input supply range encompasses a wide range of system architectures and battery chemistries.

Independent SS pins for each controller ramp the output voltages during startup. The PLLIN/MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous inductor current mode at light loads.

Features
  • Synchronous operation for highest efficiency and reduced heat dissipation
  • Wide input range: 4.5V to 38V (40V Abs max.) and operates down to 2.5V after startup
  • Output voltages up to 60V
  • ±1% 1.2V reference voltage
  • RSENSE or inductor DCR current sensing
  • 100% duty cycle capability for synchronous MOSFET
  • Low quiescent current: 125μA
  • Phase-lockable frequency (75kHz to 850kHz)
  • Programmable fixed frequency (50kHz to 900kHz)
  • Adjustable output voltage soft-start
  • Power good output voltage monitor
  • Low shutdown current IQ: <8μA
  • Internal LDO powers gate drive from VBIAS or EXTVCC
Digi-Key P/N Manufacturer P/N Description  
LTC3788EGN-1#PBF-ND LTC3788EGN-1#PBF IC CTRLR BOOST 2PH DUAL 28SSOP High-Capacitance MLCC Datasheet