LM2770 - 具有休眠模式的高效开关电容器降压 DC/DC 稳压器

LM2770是TI德州仪器公司的一款电荷泵（无感应器）产品，LM2770是具有休眠模式的高效开关电容器降压 DC/DC 稳压器，本站介绍了LM2770的封装应用图解、特点和优点、功能等，并给出了与LM2770相关的TI元器件型号供参考。

LM2770 - 具有休眠模式的高效开关电容器降压 DC/DC 稳压器 - 电荷泵（无感应器） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM2770 is a switched capacitor step-down regulator that is ideal for powering low-voltage applications in portable systems. The LM2770 can supply load currents up to 250mA and operates over an input voltage range of 2.7V to 5.5V. This makes the LM2770 a great choice for systems powered by 1-cell Li-Ion batteries and chargers. The output voltage of the LM2770 can be dynamically switched between two output levels with a logic input pin. Output voltage pairs currently available include 1.2V/1.5V and 1.2V/1.575V. Other pairs of voltage options can be developed upon request.

LM2770 efficiency is superior to both fixed-gain switched capacitor buck regulators and low-dropout linear regulators (LDO's). Multiple fractional gains maximize power efficiency over the entire input voltage and output current ranges. The LM2770 can also be switched into a low-power sleep mode when load currents are light (≤ 20mA). In sleep mode, the charge pump is off, and the output is driven with a low-noise, low-power linear regulator.

Soft-start, short-circuit protection, current-limit protection, and thermal-shutdown protection are also included. The LM2770 is available in TI’s small 10-pin Leadless Leadframe Package (WSON-10).

产品特性

High Efficiency Multi-Gain Architecture: Peak Power Efficiency >85%
Output Voltage Pairs: 1.2V/1.5V and 1.2V/1.575V
Dynamic Output Voltage Selection
±3% Output Voltage Accuracy
Output Currents up to 250mA
2.7V to 5.5V Input Range
Low-Supply-Current Sleep Mode
55µA Quiescent Supply Current in Full-Power Mode
Soft-Start
Short-Circuit Protection in Full-Power Mode
Current-Limit Protection in Sleep Mode
WSON-10 Package (3mm × 3mm × 0.8mm)

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