LM2651 - 1.5A 高效开关稳压器

LM2651是TI德州仪器公司的一款转换器（集成开关）产品，LM2651是1.5A 高效开关稳压器，本站介绍了LM2651的封装应用图解、特点和优点、功能等，并给出了与LM2651相关的TI元器件型号供参考。

LM2651 - 1.5A 高效开关稳压器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM2651 switching regulator provides high efficiency power conversion over a 100:1 load range (1.5A to 15mA). This feature makes the LM2651 an ideal fit in battery-powered applications that demand long battery life in both run and standby modes.

Synchronous rectification is used to achieve up to 97% efficiency. At light loads, the LM2651 enters a low power hysteretic or “sleep” mode to keep the efficiency high. In many applications, the efficiency still exceeds 80% at 15mA load. A shutdown pin is available to disable the LM2651 and reduce the supply current to less than 10µA.

The LM2651 contains a patented current sensing circuitry for current mode control. This feature eliminates the external current sensing resistor required by other current-mode DC-DC converters.

The LM2651 has a 300 kHz fixed frequency internal oscillator. The high oscillator frequency allows the use of extremely small, low profile components.

A programmable soft-start feature limits current surges from the input power supply at start up and provides a simple means of sequencing multiple power supplies.

Other protection features include input undervoltage lockout, current limiting, and thermal shutdown.

产品特性

Ultra High Efficiency up to 97%
High Efficiency Over a 1.5A to Milliamperes Load Range
4V to 14V Input Voltage Range
1.8V, 2.5V, 3.3V, or ADJ Output Voltage
Internal MOSFET Switch with Low RDS(on) of 75m?
300kHz Fixed Frequency Internal Oscillator
7µA Shutdown Current
Patented Current Sensing for Current Mode Control
Input Undervoltage Lockout
Adjustable Soft-Start
Current Limit and Thermal Shutdown
16-pin TSSOP Package

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