LM2750 - 低噪声稳压器开关电容器升压稳压器

LM2750是TI德州仪器公司的一款电荷泵（无感应器）产品，LM2750是低噪声稳压器开关电容器升压稳压器，本站介绍了LM2750的封装应用图解、特点和优点、功能等，并给出了与LM2750相关的TI元器件型号供参考。

LM2750 - 低噪声稳压器开关电容器升压稳压器 - 电荷泵（无感应器） - DC/DC开关稳压器 - 德州仪器

产品特性

Wide Input Voltage Range: 2.7 V to 5.6 V
Inductorless Solution: Application Requires Only Three Small Ceramic Capacitors
Fixed 5-V Output and Adjustable Output Voltage Options Available
85% Peak Efficiency
- 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
- Output Current up to 40 mA With 2.7 V ≤ VIN ≤ 2.9 V
Fixed 1.7-MHz Switching Frequency for a Low-Noise, Low-Ripple Output Signal
Pre-Regulation Minimizes Input Current Ripple, Keeping the Battery Line (VIN) Virtually Noise-Free
Shutdown Supply Current Less Than 2 µA
Tiny WSON Package With Outstanding Power Dissipation: Usually No Derating Required

产品应用

White and Colored LED-Based Display Lighting
Cellular Phone SIM Cards
Audio Amplifier Power Supplies
General Purpose Li-Ion-to-5-V Conversion

产品说明

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 the 1.7-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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
LM2750 LM2750-ADJ	WSON (10)	3.00 mm × 3.00 mm

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