Analog Devices LT7809
The LT7809 is a high-performance, step-down, DC/DC switching regulator controller that drives a N-channel synchronous silicon metal oxide semiconductor fieldeffect transistor (MOSFET) stage and can operate voltages up to 135V. Its constant frequency current mode architecture allows a phase-lockable switching frequency of up to 2.5MHz. The gate drive voltage for the LT7809 is 10V to drive standard-threshold MOSFETs to maximize efficiency.| Part No. | LT7809 |
|---|---|
| Datasheet | LT7809 Download |
| Manufacturer |  Analog Devices |
| Description | 135V Synchronous Buck Controller |
| Buy | Stock & Price |
FEATURES
● Wide Input Voltage (VIN - VSS) Range: 8.0V to 135V (140V ABS MAX)● Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 135V (140V ABS MAX)
● Dynamically Adjustable VOUT Programming
● Symmetrical Sink and Source Current Capability for Fast VOUT Slewing Up or Down
● Split-Output Gate Drivers for Adjustable Turn-On and Turn-Off Driver Strengths and Small DeadTimes (35ns)
● Floating I/O Control Pins Referenced to System GND
● 100% Duty Cycle Operation
● Programmable or Synchronizable Frequency (100kHz to 2.5MHz)
● 32-Pin (5mm x 5mm) QFN Package
APPLICATIONS
● Industrial Power Systems● Telecommunications Power Systems
● Test Equipment
GENERAL DESCRIPTION
An internal charge pump allows for 100% duty cycle operation. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LT7809 features a precision 0.8V reference, enabling the output voltage to be statically programmed from 0.8V to 135V. An output voltage adjustment pin, combined with the LT7809’s symmetrical sink and source current capability, allows the output voltage to be dynamically slewed up or down.
