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LM2772 Scheda tecnica(PDF) 1 Page - Texas Instruments |
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LM2772 Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 17 page LM2772 VIN VOUT EN Capacitors: 1 µF - TDK C1005X5R0J105K 4.7 µF - TDK C1608X5R0J475K or equivalent VIN = 3.0V to 5.5V C1 1 µF CIN 1 µF COUT 4.7 µF VOUT: 1.2V IOUT up to 150 mA High: ON Low: Shutdown C1+ C1- GND C2 1 µF C2+ C2- C3 1 µF C3+ C3- LM2772 www.ti.com SNVS486B – DECEMBER 2006 – REVISED MAY 2013 LM2772 Low-Ripple Switched Capacitor Step-Down Regulator Check for Samples: LM2772 1 FEATURES DESCRIPTION The LM2772 is a switched capacitor step-down 2 • Low-Noise Fixed Frequency Operation regulator that produces a 1.2V output. It is capable of • 1.2V Output Voltage supplying loads up to 150mA with 3% output voltage • 3% Output Voltage Regulation regulation over line, load, and temperature. The LM2772 operates with an input voltage from 3.0V to • Li-Ion (3.6V) to 1.2V with 80% Efficiency 5.5V, accommodating 1-cell Li-Ion batteries and • Very Low Output Ripple: 8mV @ 150mA chargers. • Output Currents up to 150mA The LM2772 utilizes a highly efficient regulated multi- • 2.7V to 5.5V Input Voltage Range gain charge pump. Pre-regulated 1.1MHz fixed- • Shutdown Disconnects Load from VIN frequency switching results in very low ripple and noise on both the input and the output. When output • 1.1MHz Switching Frequency currents are low, the part automatically switches to a • No Inductors…Small Solution Size low-ripple PFM regulation mode to maintain high • Short Circuit and Thermal Protection efficiency over the entire load range. • WSON-10 Package (3mm × 3mm × 0.8mm) The LM2772 is available in TI’s WSON-10 Package (WSON-10). APPLICATIONS • DSP, Memory, and Microprocessor Power Supplies • Mobile Phones and Pagers • Portable Electronic Devices Typical Application Circuit Figure 1. Figure 2. LM2772 Efficiency vs. Low-Dropout Linear Regulator (LDO) Efficiency 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2006–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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