LT7809
新規設計に推奨135V Synchronous Buck Controller with Symmetrical Sink/Source Capability and Dynamically Adjustable Output Voltage Programming
Wide input buck controller with symmetrical sink and source currents and split gate driver topology.
- 製品モデル
- 2
- 1Ku当たりの価格
- 最低価格:$10.55
製品情報
- 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 Dead-Times (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
The LT7809 is a high-performance, step-down, DC/DC switching regulator controller that drives a N-channel synchronous silicon metal oxide semiconductor field effect 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. 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.
APPLICATIONS
- Industrial Power Systems
- Telecommunications Power Systems
- Test Equipment
ドキュメント
データシート 1
ユーザ・ガイド 1
| 製品モデル | ピン/パッケージ図 | 資料 | CADシンボル、フットプリント、および3Dモデル |
|---|---|---|---|
| LT7809RUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LT7809RUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) |
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