LM5008A
- Operating Input Voltage Range: 6 V to 95 V
- Integrated 100-V N-Channel Buck Switch
- Internal Start-Up Regulator
- No Loop Compensation Required
- Ultra-Fast Transient Response
- On-Time Varies Inversely With Input Voltage
- Operating Frequency Remains Constant With Varying Line Voltage and Load Current
- Adjustable Output Voltage From 2.5 V
- Highly Efficient Operation
- Precision Internal Reference
- Low Bias Current
- Intelligent Current Limit
- Thermal Shutdown
- 8-Pin VSSOP and 8-Pin WSON Packages
- Create a Custom Design Using the LM5008A With the WEBENCH® Power Designer
The LM5008A DC/DC converter is a functional variant of the LM5008 COT Buck Switching Regulator. The functional differences of the LM5008A are: the minimum input operating voltage is 6 V, the on-time equation is slightly different, and the requirement for a minimum load current is removed.
The LM5008A 350-mA step-down switching regulator features all of the functions required to implement a low-cost and efficient buck regulator. This high-voltage converter has an integrated 100-V N-channel buck switch and operates over an input voltage range of 6 V to 95 V. The device is easy to implement and is provided in 8-pin VSSOP and the thermally enhanced 8-pin WSON packages. The converter uses PWM control scheme with an on-time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The control scheme requires no loop compensation. An intelligent current limit is implemented with forced off-time, which is inversely proportional to VOUT. This scheme ensures short-circuit control while providing minimum foldback. Other features include: thermal shutdown, VCC undervoltage lockout, gate drive undervoltage lockout, maximum duty cycle limiter, and a pre-charge switch.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM5008A 95-V, 350-mA, Constant On-Time DC/DC Buck Switching Regulator datasheet (Rev. H) | PDF | HTML | 2018年 10月 11日 |
| White paper | Wide VIN power management ICs simplify white paper (Rev. A) | 2013年 9月 19日 | ||
| EVM User's guide | AN-1925 LM5008A Evaluation Board (Rev. C) | 2013年 4月 30日 |
設計與開發
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LM5008AEVAL — 適用於 LM5008A 寬輸入電壓恆定導通時間降壓切換穩壓器的評估板
The LM5008AEVAL evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 5V output over an input range of 8V to 75V. The circuit delivers load currents to 300 mA, with current (...)
| 封裝 | 引腳 | 下載 |
|---|---|---|
| VSSOP (DGK) | 8 | 檢視選項 |
| WSON (NGU) | 8 | 檢視選項 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 資格摘要
- 進行中可靠性監測
- 晶圓廠位置
- 組裝地點