LM5005
- High-efficiency DC-DC buck converter
- Wide input voltage range: from 7V to 75V
- Adjustable output voltage: as low as 1.225V
- Output current: as high as 2.5A
- Junction temperature range –40°C to 125°C
- Integrated 75V, 160mΩ buck MOSFET
- Meets EN55022 and CISPR 22 EMI standards
- Feedback voltage accuracy: ±1.5%
- Emulated peak current-mode control
- Ultra-fast line and load transient response
- Switching frequency: from 50kHz to 500kHz
- Controller or peripheral frequency synchronization input
- 80ns minimum PWM ON time for low VOUT
- Monotonic start-up into prebiased output
- Internal high-voltage VCC bias supply regulator
- Auxiliary bias supply option to VCC
- Configurable soft start with tracking
- Precision standby and shutdown input
- Programmable input UVLO with hysteresis
- Remote shutdown and standby control
- Cycle-by-cycle overcurrent protection
- VCC and gate drive UVLO protection
- Thermal shutdown protection with hysteresis
- Thermally-enhanced 20-pin HTSSOP package
- Create a custom design using the LM5005 with the WEBENCH Power Designer
The LM5005 high-voltage buck converter features all of the functions necessary to implement an efficient high-voltage switching regulator with a minimum number of external components. This easy-to-use converter operates over an input voltage range from 7V to 75V and delivers a maximum output current of 2.5A. The control loop architecture is based upon current-mode control using an emulated current ramp for high noise immunity. Current-mode control provides inherent line feed-forward, cycle-by-cycle overcurrent protection and straightforward loop compensation. The use of an emulated control ramp reduces noise sensitivity of the PWM circuit, allowing reliable control of small duty cycles necessary in high input voltage applications.
The switching frequency is resistor-programmable from 50kHz to 500kHz. To reduce EMI, an oscillator synchronization pin allows multiple LM5005 regulators to self-synchronize or be synchronized to an external clock signal. Additional protection features include configurable soft start, external power supply tracking, thermal shutdown with automatic recovery, and remote shutdown capability.
The LM5005 is available in an 20-pin HTSSOP package with an exposed pad that is soldered to the PCB to achieve a low junction-to-board thermal impedance. To create a custom regulator design, use the LM5005 with WEBENCH Power Designer.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM5005 75V, 2.5A Step-Down Switching Regulator With Wide Input Voltage Range datasheet (Rev. F) | PDF | HTML | 2025/12/8 | ||
| 白皮書 | Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) | 2018/7/3 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
訂購與品質
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