Datenblatt-Suchmaschine für elektronische Bauteile |
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LM3242 Datenblatt(PDF) 1 Page - Texas Instruments |
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LM3242 Datenblatt(HTML) 1 Page - Texas Instruments |
1 / 28 page FB EN VIN VCON SW VIN 2.7V to 5.5V 0.4V to 3.6V 10 PF 4.7 PF PGND 0.5 PH LM3242 VOUT = 2.5 x VCON BPEN SGND DAC GPO1 LM3242 www.ti.com SNOSB48D – OCTOBER 2011 – REVISED MARCH 2013 LM3242 6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC Converter with Auto Bypass for RF Power Amplifiers Check for Samples: LM3242 1 FEATURES DESCRIPTION The LM3242 is a DC-DC converter optimized for 2 • 6MHz (typ.) PWM Switching Frequency powering RF power amplifiers (PAs) from a single • Operates from a Single Li-Ion Cell (2.7V to Lithium-Ion cell; however, it may be used in many 5.5V) other applications. It steps down an input voltage • Adjustable Output Voltage (0.4V to 3.6V) from 2.7V to 5.5V to an adjustable output voltage from 0.4V to 3.6V. Output voltage is set using a • 750 mA Maximum Load Capability (up to 1A in VCON analog input for controlling power levels and Bypass) efficiency of the RF PA. • High Efficiency (95% typ. at 3.9VIN, 3.3VOUT at The LM3242 offers five modes of operation. In PWM 500 mA) mode the device operates at a fixed frequency of • Automatic ECO/PWM/BP mode change 6MHz (typ.) which minimizes RF interference when • 9-bump DSBGA Package driving medium-to-heavy loads. At light load, the device enters into ECO mode automatically and • Current Overload Protection operates with reduced switching frequency. In ECO • Thermal Overload Protection mode, the quiescent current is reduced and extends • Soft-Start Function the battery life. Shutdown mode turns the device off and reduces battery consumption to 0.1 µA (typ.). In • Small Chip Inductor in 0805 (2012) case size low-battery condition Bypass mode reduces the voltage dropout to less than 50 mV (typ.). The part APPLICATIONS also features a Sleep mode. • Battery-Powered 3G/4G RF PAs The LM3242 is available in a 9-bump lead-free • Hand-Held Radios DSBGA package. A high switching frequency (6MHz) • RF PC Cards allows use of only three tiny surface-mount components: one inductor and two ceramic • Battery-Powered RF Devices capacitors. Typical Application 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 © 2011–2013, 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. |
Ähnliche Teilenummer - LM3242_14 |
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Ähnliche Beschreibung - LM3242_14 |
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