器件名称: A-LED8-1ABAS-MR7-1-R
功能描述: Waterproof LED - Red/Green color, M8 size connector, ø5MM, Metal housing, Solder pins, IP67 unmated
文件大小: 1200KB 共1页
简 介:LM2772 Low-Ripple Switched Capacitor Step-Down Regulator
December 2006
LM2772 Low-Ripple Switched Capacitor Step-Down Regulator
General Description
The LM2772 is a switched capacitor step-down regulator that produces a 1.2V output. It is capable of supplying loads up to 150mA with 3% output voltage regulation over line, load, and temperature. The LM2772 operates with an input voltage from 3.0V to 5.5V, accommodating 1-cell Li-Ion batteries and chargers. The LM2772 utilizes a highly efficient regulated multi-gain charge pump. Pre-regulated 1.1MHz fixed-frequency switching results in very low ripple and noise on both the input and the output. When output currents are low, the part automatically switches to a low-ripple PFM regulation mode to maintain high efficiency over the entire load range. The LM2772 is available in National’s 10-pad Leadless Leadframe No-Pullback Package (LLP-10).
Features
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Low-Noise Fixed Frequency Operation 1.2V Output Voltage 3% Output Voltage Regulation Li-Ion (3.6V) to 1.2V with 80% Efficiency Very Low Output Ripple: 8mV @ 150mA Output Currents up to 150mA 2.7V to 5.5V Input Voltage Range Shutdown Disconnects Load from VIN 1.1MHz Switching Frequency No Inductors…Small Solution Size Short Circuit and Thermal Protection LLP-10 Package (3mm × 3mm × 0.8mm)
Applications
■ DSP, Memory, and Microprocessor Power Supplies ■ Mobile Phones and Pagers ■ Portable Electronic Devices
Typical Application Circuit
LM2772 Efficiency vs. Low-……
