LM2771SD/NOPB 供应商
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LM2771SD/NOPB
品牌：TI 封装/批号：原厂原装/22+ -
LM2771SD/NOPB
品牌：TI(德州仪器) 封装/批号：WSON-10/2022+
LM2771SD/NOPB 属性参数
- 制造商：National Semiconductor (TI)
- 功能：Step Down
- 输出电压：1.5 V
- 输出电流：250 mA
- 最大工作温度：+ 85 C
- 封装 / 箱体：LLP EP
- 封装：Reel
- 最小工作温度：- 30 C
- 工厂包装数量：1000
产品特性
- Low-Noise Fixed Frequency Operation
- 1.5V Output Voltage
- Li-Ion (3.6V) to 1.5V with 81% Efficiency
- 1.7% Output Voltage Accuracy
- Very Low Output Ripple: 8mV @ 250mA
- Output Currents up to 250mA
- 2.7V to 5.5V Input Range
- Shutdown Disconnects Load from VIN
- 1.1MHz Switching Frequency
- No Inductors…Small Solution Size
- Current Limit and Thermal Protection
- WSON-10 Package (3mm × 3mm × 0.8mm)
产品概述
The LM2771 is a switched capacitor step-down regulator that produces a 1.5V output
without the use of an inductor. It is capable of supplying loads up to 250mA. The LM2771 operates
with an input voltage from 2.7V to 5.5V, and requires only 3 low-cost ceramic capacitors.
The LM2771 uses a regulated 0.5x charge pump to give power conversion efficiencies nearly
twice as high as an LDO. Pre-regulated 1.1MHz fixed-frequency switching results in very low ripple
and noise on both the input and the output. When output currents are low (<30mA typ.), the part
automatically switches to a low-ripple PFM regulation mode to maintain high efficiency over the
entire load range. At input voltages below 3.5V (Typ), the charge pump goes into pass mode, with
efficiencies similar to an LDO.
LM2771SD/NOPB 电路图
