LM2750中文资料输入电压为 2.7V 至 5.6V 的低噪声开关电容升压倍压器数据手册TI规格书

描述 Description

The LM2750 is a regulated switched-capacitor doubler that produces a low-noise output voltage. The 5-V output voltage option (LM2750-5.0) can supply up to 120 mA of output current over a 2.9-V to 5.6-V input range, as well as up to 40 mA of output current when the input voltage is as low as 2.7 V. An adjustable output voltage option with similar output current capabilities is also available (LM2750-ADJ). The LM2750 has been placed in TI's 10-pin WSON, a package with excellent thermal properties that keeps the part from overheating under almost all rated operating conditions. A perfect fit for space-constrained, battery-powered applications, the LM2750 requires only three external components: one input capacitor, one output capacitor, and one flying capacitor. Small, inexpensive ceramic capacitors are recommended for use. In conjunction with the1.7-MHz fixed switching frequency of the LM2750, these capacitors yield low output-voltage ripple, which is beneficial for systems requiring a low-noise supply. Pre-regulation minimizes input current ripple, thus reducing input noise to negligible levels. A tightly controlled soft-start feature limits inrush currents during part activation. Shutdown completely disconnects the load from the input. Output current limiting and thermal shutdown circuitry protect both the LM2750 and other connected devices in the event of output shorts or excessive current loads. For all available packages, see the orderable addendum at the end of the data sheet.

特性 Features

• Wide Input Voltage Range: 2.7 V to 5.6 V
• Fixed 5-V Output and Adjustable Output Voltage Options Available
• 70% Average Efficiency Over Li-Ion Input Range (2.9 V to 4.2 V)
• Output Current up to 120 mA With 2.9 V ≤ VIN ≤ 5.6 V
• Fixed 1.7-MHz Switching Frequency for a Low-Noise, Low-Ripple Output Signal
• Shutdown Supply Current Less Than 2 µA
• Tiny WSON Package With Outstanding Power Dissipation: Usually No Derating Required