LM2757 - 具有输出（停机时）的开关电容器升压稳压器

LM2757是TI德州仪器公司的一款电荷泵（无感应器）产品，LM2757是具有输出（停机时）的开关电容器升压稳压器，本站介绍了LM2757的封装应用图解、特点和优点、功能等，并给出了与LM2757相关的TI元器件型号供参考。

LM2757 - 具有输出（停机时）的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

Dual Gain Converter (2×, 3/2×) With up to 93% Efficiency
Inductorless Solution Uses Only 4 Small Ceramic Capacitors
Total Solution Area < 12 mm2
True Input-Output and Output-Input Disconnect
Up to 180-mA Output Current Capability (5 V)
Selectable 4.1-V, 4.5-V or 5-V Output
Pre-Regulation Minimizes Input Current Ripple
1.24-MHz Switching Frequency for Low-Noise, Low-Ripple Output Voltage
Integrated Overcurrent and Thermal Shutdown Protection

产品应用

USB/USB-OTG/HDMI Power
Supercapacitor Charger
Keypad LED Drive
Audio Amplifier Power Supply
Low-Current Camera Flash
General Purpose Li-Ion-to-5-V Conversion
Cellular Phone SIM Cards

产品说明

The LM2757 is a constant-frequency pre-regulated switched-capacitor charge pump that operates at 1.25 MHz to produce a low-noise regulated output voltage. The device can be configured to provide up to 100 mA at 4.1 V, 110 mA at 4.5 V, or 180 mA at 5 V. Excellent efficiency is achieved without the use of an inductor by operating the charge pump in a gain of either 3/2 or 2 according to the input voltage and output voltage option selection.

The LM2757 presents a high impedance at the VOUT pin when shut down. This allows for use in applications that require the regulated output bus to be driven by another supply while the LM2757 is shut down.

The LM2757 device comes in a tiny 12-pin 0.4-mm pitch DSBGA package. A perfect fit for space-constrained, battery-operated applications, the device requires only 4 small, inexpensive ceramic capacitors. Built-in soft-start, overcurrent protection, and thermal shutdown features are also included in this device.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (MAX)
LM2757	DSBGA (12)	1.641 mm × 1.581 mm

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