LP3985
- Input Voltage: 2.5 V to 6 V
- 100-mV Maximum Dropout with 150-mA Load
- 150-mA Verified Output
- 50-dB PSRR at 1 kHz at VIN = VOUT + 0.2 V
- ≤ 1.5-µA Quiescent Current when Shut Down
- Fast Turn-On time: 200 µs (typ.)
- 30-µVRMS Output Noise (typical) over 10 Hz to 100
kHz - −40°C to 125°C Junction Temperature Range for
Operation - 2.5-V, 2.6-V, 2.7-V, 2.8-V, 2.85-V, 2.9-V, 3-V, 3.1-
V, 3.2-V, 3.3-V, 4.7-V, 4.75-V, 4.8-V and 5-V
Outputs Standard - Logic Controlled Enable
- Stable with Ceramic and High-Quality Tantalum
Capacitors - Fast Turnon
- Thermal Shutdown and Short-Circuit Current Limit
The LP3985 is designed for portable and wireless applications with demanding performance and space requirements. LP3985 performance is optimized for battery-powered systems to deliver ultra low noise, extremely low dropout voltage, and low quiescent current. Regulator ground current increases only slightly in dropout, further prolonging the battery life.
The LP3985 is stable with a small 1-µF ±30% ceramic or high-quality tantalum output capacitor. The DSBGA requires the smallest possible PC board area the total application circuit area can be less than 2 mm × 2.5 mm, a fraction of a 1206 case size.
An optional external bypass capacitor reduces the output noise without slowing down the load transient response. Fast startup time is achieved by utilizing an internal power-on circuit that actively pre-charges the bypass capacitor.
Power supply rejection is better than 50 dB at low frequencies and starts to roll off at 1 kHz. High power supply rejection is maintained down to low input voltage levels common to battery operated circuits.
The device is ideal for mobile phone and similar battery-powered wireless applications. It provides up to 150 mA, from a 2.5-V to 6-V input. The LP3985 consumes less than 1.5 µA in disable mode and has fast turn-on time less than 200 µs.
The LP3985 is available with fixed output voltages from 2.5 V to 5 V. Contact Texas Instruments Sales for specific voltage option needs.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | LP3985 Micropower, 150-mA Low-Noise Ultra-Low-Dropout CMOS Voltage Regulator 数据表 (Rev. AE) | PDF | HTML | 2015年 5月 8日 | ||
EVM 用户指南 | AN-1219 LP3985 DSBGA-5 Evaluation Board Instruction (Rev. C) | 2013年 4月 30日 | ||||
EVM 用户指南 | AN-1223 LP3985 SOT23-5 Evaluation Board (Rev. C) | 2013年 4月 30日 | ||||
应用手册 | Understanding Portable Applications Requirements to Improve System Performance | 2007年 3月 22日 |
设计和开发
如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。
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封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
DSBGA (YZR) | 5 | Ultra Librarian |
SOT-23 (DBV) | 5 | Ultra Librarian |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点
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