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The L7981 device is a step-down switching regulator with a 3.7 A (minimum) current limited embedded Power MOSFET, so it is able to deliver up to 3 A current to the load depending on the application conditions.
The input voltage can range from 4.5 V to 28 V, while the output voltage can be set starting from 0.6 V to VIN.
Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz.
The QFN and the HSOP packages with exposed pad allow reducing the RthJAdown to 60°C/W and 40°C/W respectively.主要特性
- 3 A DC output current
- 4.5 V to 28 V input voltage
- Output voltage adjustable from 0.6 V
- 250 kHz switching frequency, programmable up to 1 MHz
- Internal soft-start and enable
- Low dropout operation: 100% duty cycle
- Voltage feed-forward
- Zero load current operation
- Overcurrent and thermal protection
- VFQFPN 3 x 3 - 8L and HSOP8 package
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样片和购买
| 产品型号 | 封装 | 包装类型 | 供货状态 | 预算价格(US$) | 数量 | ECCN (US) | Country of Origin | 从分销商订购 | 从ST订购 |
|---|---|---|---|---|---|---|---|---|---|
| L7981A | PowerSO-8 | Tube |
Active
|
0.746 | 10000 | EAR99 | CHINA | 查看供货情况 | 立即购买 |
| L7981TR | DFN8 3x3 | Tape And Reel |
Active
|
0.719 | 10000 | EAR99 | PHILIPPINES | 查看供货情况 | Get sample |
| L7981ATR | PowerSO-8 | Tape And Reel |
Active
|
0.746 | 10000 | EAR99 | CHINA | 查看供货情况 | Get sample |
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
精选 视频
| 产品型号 | 供货状态 | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| L7981A |
Active
|
PowerSO-8 | 工业 | Ecopack2 | |
| L7981ATR |
Active
|
PowerSO-8 | 工业 | Ecopack2 | |
| L7981TR |
Active
|
DFN8 3x3 | 工业 | Ecopack2 |
|
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
